/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_copy4_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 09:51:00,672 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 09:51:00,675 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 09:51:00,700 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 09:51:00,701 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 09:51:00,702 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 09:51:00,703 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 09:51:00,705 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 09:51:00,707 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 09:51:00,708 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 09:51:00,709 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 09:51:00,710 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 09:51:00,710 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 09:51:00,711 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 09:51:00,712 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 09:51:00,713 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 09:51:00,714 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 09:51:00,715 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 09:51:00,717 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 09:51:00,719 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 09:51:00,720 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 09:51:00,721 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 09:51:00,722 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 09:51:00,723 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 09:51:00,726 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 09:51:00,726 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 09:51:00,726 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 09:51:00,727 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 09:51:00,727 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 09:51:00,728 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 09:51:00,729 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 09:51:00,729 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 09:51:00,730 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 09:51:00,731 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 09:51:00,732 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 09:51:00,732 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 09:51:00,733 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 09:51:00,733 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 09:51:00,733 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 09:51:00,734 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 09:51:00,735 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 09:51:00,735 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 09:51:00,779 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 09:51:00,780 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 09:51:00,783 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 09:51:00,783 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 09:51:00,783 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 09:51:00,783 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 09:51:00,783 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 09:51:00,784 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 09:51:00,784 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 09:51:00,784 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 09:51:00,784 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 09:51:00,784 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 09:51:00,785 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 09:51:00,785 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 09:51:00,786 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 09:51:00,786 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 09:51:00,786 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 09:51:00,787 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 09:51:00,787 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 09:51:00,787 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 09:51:00,787 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 09:51:00,788 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 09:51:00,788 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 09:51:00,788 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 09:51:00,788 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 09:51:00,789 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 09:51:00,789 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 09:51:00,789 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 09:51:00,790 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 09:51:00,790 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 09:51:01,115 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 09:51:01,128 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 09:51:01,132 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 09:51:01,134 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 09:51:01,135 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 09:51:01,136 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy4_ground-1.i [2020-10-12 09:51:01,215 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b6dc43a91/37672f82ed7f45d8b37e8701b47f626a/FLAG36e739105 [2020-10-12 09:51:01,696 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 09:51:01,697 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_copy4_ground-1.i [2020-10-12 09:51:01,703 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b6dc43a91/37672f82ed7f45d8b37e8701b47f626a/FLAG36e739105 [2020-10-12 09:51:02,188 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b6dc43a91/37672f82ed7f45d8b37e8701b47f626a [2020-10-12 09:51:02,197 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 09:51:02,199 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 09:51:02,200 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 09:51:02,200 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 09:51:02,204 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 09:51:02,205 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 09:51:02" (1/1) ... [2020-10-12 09:51:02,208 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c33243d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:02, skipping insertion in model container [2020-10-12 09:51:02,208 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 09:51:02" (1/1) ... [2020-10-12 09:51:02,216 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 09:51:02,233 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 09:51:02,406 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 09:51:02,410 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 09:51:02,436 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 09:51:02,456 INFO L208 MainTranslator]: Completed translation [2020-10-12 09:51:02,457 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:02 WrapperNode [2020-10-12 09:51:02,457 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 09:51:02,458 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 09:51:02,458 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 09:51:02,458 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 09:51:02,555 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:02" (1/1) ... [2020-10-12 09:51:02,556 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:02" (1/1) ... [2020-10-12 09:51:02,563 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:02" (1/1) ... [2020-10-12 09:51:02,564 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:02" (1/1) ... [2020-10-12 09:51:02,573 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:02" (1/1) ... [2020-10-12 09:51:02,580 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:02" (1/1) ... [2020-10-12 09:51:02,581 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:02" (1/1) ... [2020-10-12 09:51:02,584 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 09:51:02,585 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 09:51:02,585 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 09:51:02,585 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 09:51:02,586 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:02" (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 09:51:02,658 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 09:51:02,658 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 09:51:02,658 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 09:51:02,658 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 09:51:02,658 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 09:51:02,659 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 09:51:02,659 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 09:51:02,659 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 09:51:02,659 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-12 09:51:02,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 09:51:02,659 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 09:51:02,660 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 09:51:02,660 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 09:51:02,660 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 09:51:02,978 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 09:51:02,978 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-12 09:51:02,982 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 09:51:02 BoogieIcfgContainer [2020-10-12 09:51:02,983 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 09:51:02,984 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 09:51:02,984 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 09:51:02,987 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 09:51:02,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 09:51:02" (1/3) ... [2020-10-12 09:51:02,988 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79d8a00b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 09:51:02, skipping insertion in model container [2020-10-12 09:51:02,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:02" (2/3) ... [2020-10-12 09:51:02,989 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79d8a00b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 09:51:02, skipping insertion in model container [2020-10-12 09:51:02,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 09:51:02" (3/3) ... [2020-10-12 09:51:02,991 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy4_ground-1.i [2020-10-12 09:51:03,001 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 09:51:03,008 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 09:51:03,022 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 09:51:03,067 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 09:51:03,067 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 09:51:03,067 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 09:51:03,067 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 09:51:03,068 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 09:51:03,068 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 09:51:03,068 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 09:51:03,068 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 09:51:03,086 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-10-12 09:51:03,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-12 09:51:03,093 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:03,094 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:51:03,095 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:03,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:03,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1010407240, now seen corresponding path program 1 times [2020-10-12 09:51:03,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:03,108 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [541177369] [2020-10-12 09:51:03,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:03,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:03,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:03,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:03,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:03,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:03,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:04,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:04,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-12 09:51:04,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:51:04,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 987 [2020-10-12 09:51:04,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:04,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:51:04,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 09:51:04,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 09:51:04,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-12 09:51:04,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:04,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:04,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:04,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:04,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:04,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:04,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:51:04,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:04,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:04,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:04,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:04,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 09:51:04,366 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 09:51:04,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [541177369] [2020-10-12 09:51:04,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 09:51:04,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 09:51:04,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467178770] [2020-10-12 09:51:04,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 09:51:04,382 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:04,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 09:51:04,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 09:51:04,400 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 4 states. [2020-10-12 09:51:04,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:04,601 INFO L93 Difference]: Finished difference Result 72 states and 103 transitions. [2020-10-12 09:51:04,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-12 09:51:04,603 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-12 09:51:04,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:04,619 INFO L225 Difference]: With dead ends: 72 [2020-10-12 09:51:04,619 INFO L226 Difference]: Without dead ends: 39 [2020-10-12 09:51:04,624 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 09:51:04,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-12 09:51:04,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2020-10-12 09:51:04,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-12 09:51:04,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2020-10-12 09:51:04,671 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 21 [2020-10-12 09:51:04,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:04,671 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2020-10-12 09:51:04,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 09:51:04,671 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2020-10-12 09:51:04,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-12 09:51:04,673 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:04,673 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:51:04,673 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 09:51:04,674 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:04,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:04,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1377677638, now seen corresponding path program 1 times [2020-10-12 09:51:04,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:04,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2099489462] [2020-10-12 09:51:04,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:04,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:04,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:04,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:04,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:04,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:04,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:06,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:09,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:09,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-12 09:51:09,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:51:09,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 09:51:09,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:09,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 09:51:09,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:51:09,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 09:51:09,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-12 09:51:10,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:10,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:10,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:10,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:10,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:10,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:10,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:51:10,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:10,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:10,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:10,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:10,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:51:10,879 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:51:10,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2099489462] [2020-10-12 09:51:10,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:51:10,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 09:51:10,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902861342] [2020-10-12 09:51:10,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 09:51:10,883 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:10,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 09:51:10,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2020-10-12 09:51:10,885 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand 15 states. [2020-10-12 09:51:11,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:11,485 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2020-10-12 09:51:11,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 09:51:11,485 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 29 [2020-10-12 09:51:11,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:11,489 INFO L225 Difference]: With dead ends: 67 [2020-10-12 09:51:11,489 INFO L226 Difference]: Without dead ends: 65 [2020-10-12 09:51:11,491 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2020-10-12 09:51:11,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-12 09:51:11,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 56. [2020-10-12 09:51:11,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-12 09:51:11,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 65 transitions. [2020-10-12 09:51:11,507 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 65 transitions. Word has length 29 [2020-10-12 09:51:11,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:11,507 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 65 transitions. [2020-10-12 09:51:11,508 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 09:51:11,508 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 65 transitions. [2020-10-12 09:51:11,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-12 09:51:11,509 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:11,509 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:51:11,510 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 09:51:11,510 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:11,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:11,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1068329768, now seen corresponding path program 2 times [2020-10-12 09:51:11,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:11,511 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1358555491] [2020-10-12 09:51:11,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:11,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:11,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:11,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:11,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:11,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:11,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:14,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:16,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:16,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-12 09:51:16,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:51:16,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-12 09:51:16,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:16,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 09:51:16,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:51:16,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 09:51:16,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:17,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:17,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:17,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:17,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:17,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:17,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:17,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:51:17,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:17,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:17,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:17,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:17,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:51:17,608 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:51:17,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1358555491] [2020-10-12 09:51:17,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:51:17,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 09:51:17,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248533390] [2020-10-12 09:51:17,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 09:51:17,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:17,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 09:51:17,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2020-10-12 09:51:17,614 INFO L87 Difference]: Start difference. First operand 56 states and 65 transitions. Second operand 17 states. [2020-10-12 09:51:18,208 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2020-10-12 09:51:18,477 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2020-10-12 09:51:18,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:18,793 INFO L93 Difference]: Finished difference Result 69 states and 78 transitions. [2020-10-12 09:51:18,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 09:51:18,799 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 31 [2020-10-12 09:51:18,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:18,804 INFO L225 Difference]: With dead ends: 69 [2020-10-12 09:51:18,804 INFO L226 Difference]: Without dead ends: 67 [2020-10-12 09:51:18,805 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2020-10-12 09:51:18,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-12 09:51:18,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 41. [2020-10-12 09:51:18,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-12 09:51:18,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2020-10-12 09:51:18,826 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 31 [2020-10-12 09:51:18,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:18,826 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2020-10-12 09:51:18,826 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 09:51:18,827 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2020-10-12 09:51:18,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 09:51:18,828 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:18,829 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:51:18,829 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 09:51:18,829 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:18,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:18,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1321065201, now seen corresponding path program 1 times [2020-10-12 09:51:18,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:18,832 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [701411053] [2020-10-12 09:51:18,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:18,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:18,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:18,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:18,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:18,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:18,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:22,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:22,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-12 09:51:22,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:51:22,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3343 [2020-10-12 09:51:22,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:22,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 09:51:22,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 09:51:22,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-12 09:51:22,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:22,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:22,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:22,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:22,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:22,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:22,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:22,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:51:22,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:22,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:22,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:22,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:22,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:51:22,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-12 09:51:22,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:22,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:22,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:22,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:51:22,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:22,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:51:22,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:22,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:22,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:51:22,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:22,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 09:51:22,255 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-12 09:51:22,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [701411053] [2020-10-12 09:51:22,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:51:22,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-12 09:51:22,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104275742] [2020-10-12 09:51:22,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 09:51:22,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:22,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 09:51:22,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 09:51:22,259 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand 5 states. [2020-10-12 09:51:22,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:22,389 INFO L93 Difference]: Finished difference Result 82 states and 94 transitions. [2020-10-12 09:51:22,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 09:51:22,389 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2020-10-12 09:51:22,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:22,390 INFO L225 Difference]: With dead ends: 82 [2020-10-12 09:51:22,391 INFO L226 Difference]: Without dead ends: 53 [2020-10-12 09:51:22,392 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 09:51:22,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-12 09:51:22,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2020-10-12 09:51:22,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-12 09:51:22,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2020-10-12 09:51:22,410 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 37 [2020-10-12 09:51:22,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:22,411 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2020-10-12 09:51:22,411 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 09:51:22,411 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2020-10-12 09:51:22,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-12 09:51:22,414 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:22,415 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:51:22,415 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 09:51:22,416 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:22,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:22,417 INFO L82 PathProgramCache]: Analyzing trace with hash -190611479, now seen corresponding path program 2 times [2020-10-12 09:51:22,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:22,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [961459280] [2020-10-12 09:51:22,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:22,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:22,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:22,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:22,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:22,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:22,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:27,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:27,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-12 09:51:27,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:51:27,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 09:51:27,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:27,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:51:27,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-12 09:51:27,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:51:27,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:27,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:27,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:27,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:27,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:27,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:27,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:27,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 09:51:27,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:27,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:27,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:27,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:27,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:51:27,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-12 09:51:27,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:27,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:27,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:27,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:51:27,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:27,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:51:27,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:27,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:27,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:51:27,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:27,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:51:27,499 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-12 09:51:27,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [961459280] [2020-10-12 09:51:27,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:51:27,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 09:51:27,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861090986] [2020-10-12 09:51:27,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 09:51:27,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:27,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 09:51:27,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-12 09:51:27,505 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand 6 states. [2020-10-12 09:51:27,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:27,671 INFO L93 Difference]: Finished difference Result 96 states and 108 transitions. [2020-10-12 09:51:27,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 09:51:27,673 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 45 [2020-10-12 09:51:27,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:27,675 INFO L225 Difference]: With dead ends: 96 [2020-10-12 09:51:27,675 INFO L226 Difference]: Without dead ends: 61 [2020-10-12 09:51:27,675 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-12 09:51:27,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-12 09:51:27,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 57. [2020-10-12 09:51:27,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-12 09:51:27,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2020-10-12 09:51:27,692 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 45 [2020-10-12 09:51:27,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:27,692 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2020-10-12 09:51:27,692 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 09:51:27,693 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2020-10-12 09:51:27,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-12 09:51:27,698 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:27,699 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:51:27,700 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 09:51:27,700 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:27,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:27,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1974602977, now seen corresponding path program 3 times [2020-10-12 09:51:27,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:27,701 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [994551252] [2020-10-12 09:51:27,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:27,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:27,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:27,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:27,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:27,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:27,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:32,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:32,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 09:51:32,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:51:32,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 09:51:32,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:32,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 09:51:32,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:51:32,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 09:51:32,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:32,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:32,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:32,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:32,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:32,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:32,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:32,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:51:32,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:32,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:32,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:32,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:32,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:32,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-12 09:51:32,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:32,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:32,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:32,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:51:32,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:32,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:51:32,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:32,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:32,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:51:32,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:32,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:32,767 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-10-12 09:51:32,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [994551252] [2020-10-12 09:51:32,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:51:32,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 09:51:32,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333911541] [2020-10-12 09:51:32,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 09:51:32,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:32,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 09:51:32,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 09:51:32,770 INFO L87 Difference]: Start difference. First operand 57 states and 62 transitions. Second operand 7 states. [2020-10-12 09:51:32,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:32,953 INFO L93 Difference]: Finished difference Result 110 states and 122 transitions. [2020-10-12 09:51:32,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 09:51:32,954 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 53 [2020-10-12 09:51:32,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:32,955 INFO L225 Difference]: With dead ends: 110 [2020-10-12 09:51:32,955 INFO L226 Difference]: Without dead ends: 69 [2020-10-12 09:51:32,956 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 09:51:32,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-12 09:51:32,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 65. [2020-10-12 09:51:32,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-12 09:51:32,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2020-10-12 09:51:32,967 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 53 [2020-10-12 09:51:32,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:32,968 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2020-10-12 09:51:32,968 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 09:51:32,968 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2020-10-12 09:51:32,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-12 09:51:32,969 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:32,969 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:51:32,969 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 09:51:32,969 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:32,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:32,970 INFO L82 PathProgramCache]: Analyzing trace with hash 164725209, now seen corresponding path program 4 times [2020-10-12 09:51:32,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:32,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1083466313] [2020-10-12 09:51:32,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:32,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:32,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:32,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:32,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:33,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:33,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:37,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:37,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 09:51:37,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:51:37,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 09:51:37,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:37,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 09:51:37,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:51:37,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 09:51:37,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:38,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:38,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:38,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:38,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:38,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:38,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:38,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:51:38,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:38,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:38,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:38,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:38,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:38,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-12 09:51:38,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:38,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:38,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:38,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:51:38,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:38,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:51:38,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:38,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:38,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:51:38,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:38,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:38,042 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-10-12 09:51:38,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1083466313] [2020-10-12 09:51:38,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:51:38,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 09:51:38,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758745837] [2020-10-12 09:51:38,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 09:51:38,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:38,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 09:51:38,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-12 09:51:38,045 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand 8 states. [2020-10-12 09:51:38,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:38,257 INFO L93 Difference]: Finished difference Result 124 states and 136 transitions. [2020-10-12 09:51:38,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 09:51:38,257 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 61 [2020-10-12 09:51:38,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:38,258 INFO L225 Difference]: With dead ends: 124 [2020-10-12 09:51:38,258 INFO L226 Difference]: Without dead ends: 77 [2020-10-12 09:51:38,259 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-12 09:51:38,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-12 09:51:38,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 73. [2020-10-12 09:51:38,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-12 09:51:38,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 78 transitions. [2020-10-12 09:51:38,272 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 78 transitions. Word has length 61 [2020-10-12 09:51:38,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:38,272 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 78 transitions. [2020-10-12 09:51:38,272 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 09:51:38,272 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 78 transitions. [2020-10-12 09:51:38,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-12 09:51:38,273 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:38,273 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:51:38,273 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 09:51:38,274 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:38,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:38,274 INFO L82 PathProgramCache]: Analyzing trace with hash -219554095, now seen corresponding path program 5 times [2020-10-12 09:51:38,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:38,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [167442219] [2020-10-12 09:51:38,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:38,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:38,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:38,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:38,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:38,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:38,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:43,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:43,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-12 09:51:43,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:51:43,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 09:51:43,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:43,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 09:51:43,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-12 09:51:43,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 09:51:43,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:43,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:43,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:43,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:43,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:43,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:43,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:43,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:51:43,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:43,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:43,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:43,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:43,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:43,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-12 09:51:43,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:43,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:43,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:43,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:51:43,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:43,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:51:43,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:43,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:43,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:51:43,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:43,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:43,356 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-10-12 09:51:43,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [167442219] [2020-10-12 09:51:43,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:51:43,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 09:51:43,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359981302] [2020-10-12 09:51:43,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 09:51:43,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:43,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 09:51:43,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-12 09:51:43,359 INFO L87 Difference]: Start difference. First operand 73 states and 78 transitions. Second operand 9 states. [2020-10-12 09:51:43,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:43,582 INFO L93 Difference]: Finished difference Result 138 states and 150 transitions. [2020-10-12 09:51:43,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 09:51:43,583 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 69 [2020-10-12 09:51:43,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:43,584 INFO L225 Difference]: With dead ends: 138 [2020-10-12 09:51:43,584 INFO L226 Difference]: Without dead ends: 85 [2020-10-12 09:51:43,586 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-12 09:51:43,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-12 09:51:43,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 81. [2020-10-12 09:51:43,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-12 09:51:43,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 86 transitions. [2020-10-12 09:51:43,600 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 86 transitions. Word has length 69 [2020-10-12 09:51:43,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:43,600 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 86 transitions. [2020-10-12 09:51:43,600 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 09:51:43,600 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 86 transitions. [2020-10-12 09:51:43,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-12 09:51:43,601 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:43,601 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:51:43,602 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 09:51:43,602 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:43,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:43,602 INFO L82 PathProgramCache]: Analyzing trace with hash 2095260617, now seen corresponding path program 6 times [2020-10-12 09:51:43,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:43,603 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1275381257] [2020-10-12 09:51:43,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:43,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:43,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:43,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:43,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:43,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:45,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:48,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:48,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-12 09:51:48,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:51:48,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 09:51:48,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:48,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 09:51:48,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-12 09:51:48,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 09:51:48,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:48,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:48,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:48,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:48,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:48,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:48,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:48,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:51:48,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:48,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:48,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:48,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:48,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:48,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-10-12 09:51:48,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:48,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:48,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:48,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:51:48,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:48,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:51:48,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:48,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:48,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:51:48,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:48,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:48,702 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-12 09:51:48,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1275381257] [2020-10-12 09:51:48,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:51:48,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 09:51:48,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546209464] [2020-10-12 09:51:48,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 09:51:48,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:48,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 09:51:48,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-12 09:51:48,705 INFO L87 Difference]: Start difference. First operand 81 states and 86 transitions. Second operand 10 states. [2020-10-12 09:51:48,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:48,953 INFO L93 Difference]: Finished difference Result 152 states and 164 transitions. [2020-10-12 09:51:48,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 09:51:48,954 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 77 [2020-10-12 09:51:48,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:48,955 INFO L225 Difference]: With dead ends: 152 [2020-10-12 09:51:48,955 INFO L226 Difference]: Without dead ends: 93 [2020-10-12 09:51:48,956 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-12 09:51:48,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-12 09:51:48,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2020-10-12 09:51:48,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-12 09:51:48,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 94 transitions. [2020-10-12 09:51:48,975 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 94 transitions. Word has length 77 [2020-10-12 09:51:48,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:48,976 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 94 transitions. [2020-10-12 09:51:48,976 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 09:51:48,976 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 94 transitions. [2020-10-12 09:51:48,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-12 09:51:48,977 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:48,977 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:51:48,977 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 09:51:48,977 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:48,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:48,978 INFO L82 PathProgramCache]: Analyzing trace with hash -39497535, now seen corresponding path program 7 times [2020-10-12 09:51:48,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:48,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [288261863] [2020-10-12 09:51:48,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:48,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:48,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:48,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:49,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:49,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:50,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:54,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:54,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-12 09:51:54,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:51:54,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-12 09:51:54,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:54,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 09:51:54,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-12 09:51:54,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 09:51:54,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:54,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:54,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:54,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:54,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:54,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:54,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:54,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:51:54,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:54,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:54,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:54,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:54,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:54,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-10-12 09:51:54,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:54,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:54,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:54,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:51:54,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:54,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:51:54,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:54,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:54,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:51:54,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:54,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:54,109 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 2 proven. 49 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2020-10-12 09:51:54,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [288261863] [2020-10-12 09:51:54,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:51:54,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 09:51:54,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879694247] [2020-10-12 09:51:54,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 09:51:54,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:54,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 09:51:54,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-12 09:51:54,111 INFO L87 Difference]: Start difference. First operand 89 states and 94 transitions. Second operand 11 states. [2020-10-12 09:51:54,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:54,328 INFO L93 Difference]: Finished difference Result 166 states and 178 transitions. [2020-10-12 09:51:54,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 09:51:54,328 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 85 [2020-10-12 09:51:54,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:54,331 INFO L225 Difference]: With dead ends: 166 [2020-10-12 09:51:54,332 INFO L226 Difference]: Without dead ends: 101 [2020-10-12 09:51:54,333 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-12 09:51:54,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-12 09:51:54,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 97. [2020-10-12 09:51:54,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-12 09:51:54,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 102 transitions. [2020-10-12 09:51:54,350 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 102 transitions. Word has length 85 [2020-10-12 09:51:54,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:54,353 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 102 transitions. [2020-10-12 09:51:54,353 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 09:51:54,353 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 102 transitions. [2020-10-12 09:51:54,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-12 09:51:54,355 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:54,356 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:51:54,356 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 09:51:54,356 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:54,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:54,356 INFO L82 PathProgramCache]: Analyzing trace with hash -719821383, now seen corresponding path program 8 times [2020-10-12 09:51:54,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:54,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [886789228] [2020-10-12 09:51:54,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:54,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:54,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:54,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:54,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:54,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:59,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:59,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-12 09:51:59,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:51:59,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 09:51:59,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:59,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 09:51:59,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-12 09:51:59,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 09:51:59,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:59,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:59,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:59,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:59,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:59,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:59,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:59,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:51:59,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:59,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:59,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:59,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:59,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:59,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-10-12 09:51:59,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:59,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:59,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:59,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:51:59,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:59,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:51:59,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:59,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:59,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:51:59,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:59,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:59,494 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2020-10-12 09:51:59,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [886789228] [2020-10-12 09:51:59,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:51:59,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 09:51:59,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985742954] [2020-10-12 09:51:59,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 09:51:59,497 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:59,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 09:51:59,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-12 09:51:59,498 INFO L87 Difference]: Start difference. First operand 97 states and 102 transitions. Second operand 12 states. [2020-10-12 09:51:59,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:59,856 INFO L93 Difference]: Finished difference Result 180 states and 192 transitions. [2020-10-12 09:51:59,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 09:51:59,857 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 93 [2020-10-12 09:51:59,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:59,859 INFO L225 Difference]: With dead ends: 180 [2020-10-12 09:51:59,859 INFO L226 Difference]: Without dead ends: 109 [2020-10-12 09:51:59,860 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-12 09:51:59,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-12 09:51:59,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 105. [2020-10-12 09:51:59,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-12 09:51:59,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 110 transitions. [2020-10-12 09:51:59,907 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 110 transitions. Word has length 93 [2020-10-12 09:51:59,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:59,907 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 110 transitions. [2020-10-12 09:51:59,907 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 09:51:59,908 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 110 transitions. [2020-10-12 09:51:59,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-12 09:51:59,909 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:59,909 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:51:59,910 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 09:51:59,910 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:59,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:59,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1831101105, now seen corresponding path program 9 times [2020-10-12 09:51:59,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:59,911 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1478626935] [2020-10-12 09:51:59,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:59,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:59,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:59,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:59,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:00,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:04,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:04,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-12 09:52:04,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:52:04,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-12 09:52:04,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:04,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 09:52:04,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:52:04,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 09:52:04,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:05,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:05,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:05,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:05,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:05,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:05,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:05,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:05,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:05,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:05,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:05,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:05,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:05,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-10-12 09:52:05,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:05,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:05,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:05,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:52:05,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:05,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:05,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:05,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:05,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:52:05,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:05,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:05,099 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 2 proven. 81 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2020-10-12 09:52:05,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1478626935] [2020-10-12 09:52:05,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:05,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 09:52:05,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873322705] [2020-10-12 09:52:05,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 09:52:05,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:05,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 09:52:05,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-12 09:52:05,103 INFO L87 Difference]: Start difference. First operand 105 states and 110 transitions. Second operand 13 states. [2020-10-12 09:52:05,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:05,450 INFO L93 Difference]: Finished difference Result 194 states and 206 transitions. [2020-10-12 09:52:05,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 09:52:05,451 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 101 [2020-10-12 09:52:05,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:05,452 INFO L225 Difference]: With dead ends: 194 [2020-10-12 09:52:05,453 INFO L226 Difference]: Without dead ends: 117 [2020-10-12 09:52:05,454 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-12 09:52:05,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-12 09:52:05,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 113. [2020-10-12 09:52:05,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-12 09:52:05,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 118 transitions. [2020-10-12 09:52:05,473 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 118 transitions. Word has length 101 [2020-10-12 09:52:05,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:05,474 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 118 transitions. [2020-10-12 09:52:05,474 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 09:52:05,474 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 118 transitions. [2020-10-12 09:52:05,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-12 09:52:05,475 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:05,475 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:52:05,475 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 09:52:05,475 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:05,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:05,476 INFO L82 PathProgramCache]: Analyzing trace with hash 967919529, now seen corresponding path program 10 times [2020-10-12 09:52:05,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:05,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [24878031] [2020-10-12 09:52:05,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:05,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:05,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:05,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:05,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:05,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:10,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:10,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-12 09:52:10,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:52:10,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-12 09:52:10,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:10,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 09:52:10,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-12 09:52:10,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 09:52:10,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:10,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:10,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:10,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:10,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:10,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:10,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:10,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:10,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:10,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:10,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:10,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:10,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:10,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-10-12 09:52:10,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:10,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:10,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:10,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:52:10,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:10,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:52:10,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:10,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:10,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:52:10,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:10,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:10,633 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 2 proven. 100 refuted. 0 times theorem prover too weak. 302 trivial. 0 not checked. [2020-10-12 09:52:10,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [24878031] [2020-10-12 09:52:10,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:10,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 09:52:10,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291527413] [2020-10-12 09:52:10,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 09:52:10,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:10,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 09:52:10,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-12 09:52:10,635 INFO L87 Difference]: Start difference. First operand 113 states and 118 transitions. Second operand 14 states. [2020-10-12 09:52:10,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:10,968 INFO L93 Difference]: Finished difference Result 208 states and 220 transitions. [2020-10-12 09:52:10,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 09:52:10,969 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 109 [2020-10-12 09:52:10,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:10,971 INFO L225 Difference]: With dead ends: 208 [2020-10-12 09:52:10,971 INFO L226 Difference]: Without dead ends: 125 [2020-10-12 09:52:10,972 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-12 09:52:10,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-12 09:52:10,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 121. [2020-10-12 09:52:10,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-12 09:52:10,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 126 transitions. [2020-10-12 09:52:10,989 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 126 transitions. Word has length 109 [2020-10-12 09:52:10,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:10,989 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 126 transitions. [2020-10-12 09:52:10,989 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 09:52:10,989 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 126 transitions. [2020-10-12 09:52:10,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-12 09:52:10,993 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:10,994 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:52:10,994 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 09:52:10,994 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:10,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:10,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1197009759, now seen corresponding path program 11 times [2020-10-12 09:52:10,995 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:10,996 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1481216532] [2020-10-12 09:52:10,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:11,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:11,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:11,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:11,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:11,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:16,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:16,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-12 09:52:16,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:52:16,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-12 09:52:16,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:16,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 09:52:16,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-12 09:52:16,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 09:52:16,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:16,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:16,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:16,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:16,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:16,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:16,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:16,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:16,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:16,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:16,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:16,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:16,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:16,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-10-12 09:52:16,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:16,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:16,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:16,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:52:16,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:16,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:52:16,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:16,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:16,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:52:16,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:16,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:16,169 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 2 proven. 121 refuted. 0 times theorem prover too weak. 365 trivial. 0 not checked. [2020-10-12 09:52:16,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1481216532] [2020-10-12 09:52:16,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:16,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 09:52:16,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478242068] [2020-10-12 09:52:16,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 09:52:16,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:16,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 09:52:16,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-12 09:52:16,173 INFO L87 Difference]: Start difference. First operand 121 states and 126 transitions. Second operand 15 states. [2020-10-12 09:52:16,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:16,478 INFO L93 Difference]: Finished difference Result 222 states and 234 transitions. [2020-10-12 09:52:16,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 09:52:16,479 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 117 [2020-10-12 09:52:16,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:16,480 INFO L225 Difference]: With dead ends: 222 [2020-10-12 09:52:16,480 INFO L226 Difference]: Without dead ends: 133 [2020-10-12 09:52:16,481 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-12 09:52:16,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-12 09:52:16,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 129. [2020-10-12 09:52:16,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-12 09:52:16,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 134 transitions. [2020-10-12 09:52:16,498 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 134 transitions. Word has length 117 [2020-10-12 09:52:16,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:16,498 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 134 transitions. [2020-10-12 09:52:16,498 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 09:52:16,499 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 134 transitions. [2020-10-12 09:52:16,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-12 09:52:16,500 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:16,500 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:52:16,500 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 09:52:16,500 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:16,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:16,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1911409049, now seen corresponding path program 12 times [2020-10-12 09:52:16,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:16,501 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [409962469] [2020-10-12 09:52:16,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:16,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:16,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:16,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:16,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:16,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:21,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:21,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-12 09:52:21,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:52:21,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5044 [2020-10-12 09:52:21,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:21,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 09:52:21,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-12 09:52:21,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 09:52:21,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:21,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:21,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:21,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:21,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:21,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:21,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:21,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:21,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:21,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:21,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:21,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:21,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:21,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2020-10-12 09:52:21,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:21,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:21,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:21,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:52:21,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:21,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:52:21,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:21,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:21,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:52:21,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:21,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:21,727 INFO L134 CoverageAnalysis]: Checked inductivity of 580 backedges. 2 proven. 144 refuted. 0 times theorem prover too weak. 434 trivial. 0 not checked. [2020-10-12 09:52:21,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [409962469] [2020-10-12 09:52:21,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:21,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 09:52:21,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524660934] [2020-10-12 09:52:21,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 09:52:21,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:21,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 09:52:21,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-12 09:52:21,729 INFO L87 Difference]: Start difference. First operand 129 states and 134 transitions. Second operand 16 states. [2020-10-12 09:52:22,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:22,041 INFO L93 Difference]: Finished difference Result 236 states and 248 transitions. [2020-10-12 09:52:22,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 09:52:22,042 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 125 [2020-10-12 09:52:22,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:22,043 INFO L225 Difference]: With dead ends: 236 [2020-10-12 09:52:22,043 INFO L226 Difference]: Without dead ends: 141 [2020-10-12 09:52:22,044 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-12 09:52:22,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-12 09:52:22,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 137. [2020-10-12 09:52:22,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-12 09:52:22,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 142 transitions. [2020-10-12 09:52:22,057 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 142 transitions. Word has length 125 [2020-10-12 09:52:22,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:22,058 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 142 transitions. [2020-10-12 09:52:22,058 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 09:52:22,058 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 142 transitions. [2020-10-12 09:52:22,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-12 09:52:22,059 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:22,059 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:52:22,060 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 09:52:22,060 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:22,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:22,060 INFO L82 PathProgramCache]: Analyzing trace with hash -143825263, now seen corresponding path program 13 times [2020-10-12 09:52:22,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:22,061 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [748403216] [2020-10-12 09:52:22,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:22,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:22,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:22,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:22,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:22,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:27,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:27,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-12 09:52:27,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:52:27,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5050 [2020-10-12 09:52:27,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:27,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 09:52:27,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-12 09:52:27,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 09:52:27,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:27,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:27,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:27,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:27,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:27,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:27,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:27,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:27,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:27,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:27,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:27,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:27,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:27,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2020-10-12 09:52:27,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:27,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:27,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:27,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:52:27,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:27,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:52:27,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:27,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:27,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:52:27,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:27,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:27,322 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 2 proven. 169 refuted. 0 times theorem prover too weak. 509 trivial. 0 not checked. [2020-10-12 09:52:27,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [748403216] [2020-10-12 09:52:27,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:27,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 09:52:27,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637491872] [2020-10-12 09:52:27,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 09:52:27,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:27,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 09:52:27,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-12 09:52:27,325 INFO L87 Difference]: Start difference. First operand 137 states and 142 transitions. Second operand 17 states. [2020-10-12 09:52:27,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:27,641 INFO L93 Difference]: Finished difference Result 250 states and 262 transitions. [2020-10-12 09:52:27,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 09:52:27,641 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 133 [2020-10-12 09:52:27,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:27,643 INFO L225 Difference]: With dead ends: 250 [2020-10-12 09:52:27,643 INFO L226 Difference]: Without dead ends: 149 [2020-10-12 09:52:27,644 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-12 09:52:27,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-12 09:52:27,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 145. [2020-10-12 09:52:27,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-12 09:52:27,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 150 transitions. [2020-10-12 09:52:27,657 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 150 transitions. Word has length 133 [2020-10-12 09:52:27,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:27,658 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 150 transitions. [2020-10-12 09:52:27,658 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 09:52:27,658 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 150 transitions. [2020-10-12 09:52:27,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-10-12 09:52:27,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:27,659 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:52:27,660 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 09:52:27,660 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:27,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:27,660 INFO L82 PathProgramCache]: Analyzing trace with hash -452072567, now seen corresponding path program 14 times [2020-10-12 09:52:27,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:27,661 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [189182170] [2020-10-12 09:52:27,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:27,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:27,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:27,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:27,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:27,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:32,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:32,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 151 [2020-10-12 09:52:32,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:52:32,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5043 [2020-10-12 09:52:32,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:32,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 09:52:32,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-12 09:52:32,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 09:52:32,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:32,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:32,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:32,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:32,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:32,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:32,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:32,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:32,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:32,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:32,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:32,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:32,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:32,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2020-10-12 09:52:32,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:32,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:32,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:32,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:52:32,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:32,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:52:32,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:32,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:32,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:52:32,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:32,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:32,922 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 2 proven. 196 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-10-12 09:52:32,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [189182170] [2020-10-12 09:52:32,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:32,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 09:52:32,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064724331] [2020-10-12 09:52:32,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 09:52:32,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:32,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 09:52:32,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-12 09:52:32,924 INFO L87 Difference]: Start difference. First operand 145 states and 150 transitions. Second operand 18 states. [2020-10-12 09:52:33,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:33,287 INFO L93 Difference]: Finished difference Result 264 states and 276 transitions. [2020-10-12 09:52:33,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 09:52:33,288 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 141 [2020-10-12 09:52:33,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:33,290 INFO L225 Difference]: With dead ends: 264 [2020-10-12 09:52:33,290 INFO L226 Difference]: Without dead ends: 157 [2020-10-12 09:52:33,291 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-12 09:52:33,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-12 09:52:33,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 153. [2020-10-12 09:52:33,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-12 09:52:33,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 158 transitions. [2020-10-12 09:52:33,305 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 158 transitions. Word has length 141 [2020-10-12 09:52:33,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:33,306 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 158 transitions. [2020-10-12 09:52:33,306 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 09:52:33,306 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 158 transitions. [2020-10-12 09:52:33,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-10-12 09:52:33,307 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:33,308 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:52:33,308 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 09:52:33,308 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:33,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:33,308 INFO L82 PathProgramCache]: Analyzing trace with hash -524855167, now seen corresponding path program 15 times [2020-10-12 09:52:33,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:33,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [820121680] [2020-10-12 09:52:33,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:33,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:33,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:33,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:33,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:33,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:38,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:38,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-12 09:52:38,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:52:38,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5053 [2020-10-12 09:52:38,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:38,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 09:52:38,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:52:38,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 09:52:38,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:38,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:38,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:38,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:38,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:38,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:38,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:38,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:38,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:38,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:38,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:38,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:38,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:38,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-10-12 09:52:38,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:38,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:38,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:38,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:52:38,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:38,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:52:38,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:38,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:38,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:52:38,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:38,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:38,588 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 2 proven. 225 refuted. 0 times theorem prover too weak. 677 trivial. 0 not checked. [2020-10-12 09:52:38,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [820121680] [2020-10-12 09:52:38,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:38,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 09:52:38,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544826021] [2020-10-12 09:52:38,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 09:52:38,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:38,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 09:52:38,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-12 09:52:38,591 INFO L87 Difference]: Start difference. First operand 153 states and 158 transitions. Second operand 19 states. [2020-10-12 09:52:39,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:39,005 INFO L93 Difference]: Finished difference Result 278 states and 290 transitions. [2020-10-12 09:52:39,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 09:52:39,005 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 149 [2020-10-12 09:52:39,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:39,006 INFO L225 Difference]: With dead ends: 278 [2020-10-12 09:52:39,007 INFO L226 Difference]: Without dead ends: 165 [2020-10-12 09:52:39,007 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-12 09:52:39,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-12 09:52:39,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 161. [2020-10-12 09:52:39,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-12 09:52:39,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 166 transitions. [2020-10-12 09:52:39,023 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 166 transitions. Word has length 149 [2020-10-12 09:52:39,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:39,023 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 166 transitions. [2020-10-12 09:52:39,023 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 09:52:39,023 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 166 transitions. [2020-10-12 09:52:39,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-10-12 09:52:39,025 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:39,025 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:52:39,025 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 09:52:39,025 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:39,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:39,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1705923207, now seen corresponding path program 16 times [2020-10-12 09:52:39,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:39,026 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1457426270] [2020-10-12 09:52:39,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:39,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:39,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:39,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:39,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:39,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:44,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:44,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-12 09:52:44,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:52:44,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5050 [2020-10-12 09:52:44,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:44,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 09:52:44,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-12 09:52:44,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 09:52:44,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:44,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:44,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:44,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:44,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:44,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:44,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:44,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:44,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:44,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:44,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:44,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:44,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:44,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2020-10-12 09:52:44,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:44,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:44,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:44,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:52:44,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:44,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:52:44,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:44,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:44,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:52:44,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:44,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:44,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1028 backedges. 2 proven. 256 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2020-10-12 09:52:44,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1457426270] [2020-10-12 09:52:44,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:44,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 09:52:44,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833784954] [2020-10-12 09:52:44,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 09:52:44,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:44,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 09:52:44,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-12 09:52:44,348 INFO L87 Difference]: Start difference. First operand 161 states and 166 transitions. Second operand 20 states. [2020-10-12 09:52:44,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:44,787 INFO L93 Difference]: Finished difference Result 292 states and 304 transitions. [2020-10-12 09:52:44,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 09:52:44,788 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 157 [2020-10-12 09:52:44,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:44,789 INFO L225 Difference]: With dead ends: 292 [2020-10-12 09:52:44,789 INFO L226 Difference]: Without dead ends: 173 [2020-10-12 09:52:44,790 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-12 09:52:44,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-12 09:52:44,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 169. [2020-10-12 09:52:44,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-12 09:52:44,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 174 transitions. [2020-10-12 09:52:44,804 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 174 transitions. Word has length 157 [2020-10-12 09:52:44,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:44,805 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 174 transitions. [2020-10-12 09:52:44,805 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 09:52:44,805 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 174 transitions. [2020-10-12 09:52:44,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-10-12 09:52:44,807 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:44,807 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:52:44,807 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 09:52:44,807 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:44,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:44,808 INFO L82 PathProgramCache]: Analyzing trace with hash -876287375, now seen corresponding path program 17 times [2020-10-12 09:52:44,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:44,808 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2122503366] [2020-10-12 09:52:44,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:44,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:44,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:44,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:44,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:44,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:49,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:49,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 175 [2020-10-12 09:52:49,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:52:49,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5104 [2020-10-12 09:52:49,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:49,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 09:52:49,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-12 09:52:49,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 09:52:49,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:50,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:50,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:50,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:50,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:50,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:50,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:50,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:52:50,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:50,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:50,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:50,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:50,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:50,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-10-12 09:52:50,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:50,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:50,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:50,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:52:50,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:50,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:52:50,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:50,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:50,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:52:50,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:50,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:50,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1160 backedges. 2 proven. 289 refuted. 0 times theorem prover too weak. 869 trivial. 0 not checked. [2020-10-12 09:52:50,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2122503366] [2020-10-12 09:52:50,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:50,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 09:52:50,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089477391] [2020-10-12 09:52:50,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 09:52:50,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:50,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 09:52:50,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-12 09:52:50,210 INFO L87 Difference]: Start difference. First operand 169 states and 174 transitions. Second operand 21 states. [2020-10-12 09:52:50,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:50,678 INFO L93 Difference]: Finished difference Result 306 states and 318 transitions. [2020-10-12 09:52:50,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 09:52:50,679 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 165 [2020-10-12 09:52:50,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:50,681 INFO L225 Difference]: With dead ends: 306 [2020-10-12 09:52:50,681 INFO L226 Difference]: Without dead ends: 181 [2020-10-12 09:52:50,682 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-12 09:52:50,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-12 09:52:50,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 177. [2020-10-12 09:52:50,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-10-12 09:52:50,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 182 transitions. [2020-10-12 09:52:50,698 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 182 transitions. Word has length 165 [2020-10-12 09:52:50,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:50,699 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 182 transitions. [2020-10-12 09:52:50,699 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 09:52:50,699 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 182 transitions. [2020-10-12 09:52:50,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-10-12 09:52:50,701 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:50,701 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:52:50,701 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 09:52:50,701 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:50,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:50,702 INFO L82 PathProgramCache]: Analyzing trace with hash 955846505, now seen corresponding path program 18 times [2020-10-12 09:52:50,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:50,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1919862409] [2020-10-12 09:52:50,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:50,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:50,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:50,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:50,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:50,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:56,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:56,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 183 [2020-10-12 09:52:56,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:52:56,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5320 [2020-10-12 09:52:56,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:56,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 09:52:56,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:52:56,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 09:52:56,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:56,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:56,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:56,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:56,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:56,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:56,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:56,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:52:56,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:56,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:56,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:56,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:56,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:56,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2020-10-12 09:52:56,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:56,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:56,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:56,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:52:56,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:56,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:52:56,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:56,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:56,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:52:56,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:56,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:56,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 2 proven. 324 refuted. 0 times theorem prover too weak. 974 trivial. 0 not checked. [2020-10-12 09:52:56,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1919862409] [2020-10-12 09:52:56,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:56,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 09:52:56,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37991659] [2020-10-12 09:52:56,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 09:52:56,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:56,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 09:52:56,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-12 09:52:56,347 INFO L87 Difference]: Start difference. First operand 177 states and 182 transitions. Second operand 22 states. [2020-10-12 09:52:56,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:56,780 INFO L93 Difference]: Finished difference Result 320 states and 332 transitions. [2020-10-12 09:52:56,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 09:52:56,780 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 173 [2020-10-12 09:52:56,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:56,782 INFO L225 Difference]: With dead ends: 320 [2020-10-12 09:52:56,782 INFO L226 Difference]: Without dead ends: 189 [2020-10-12 09:52:56,783 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-12 09:52:56,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-12 09:52:56,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 185. [2020-10-12 09:52:56,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-10-12 09:52:56,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 190 transitions. [2020-10-12 09:52:56,799 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 190 transitions. Word has length 173 [2020-10-12 09:52:56,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:56,800 INFO L479 AbstractCegarLoop]: Abstraction has 185 states and 190 transitions. [2020-10-12 09:52:56,800 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 09:52:56,800 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 190 transitions. [2020-10-12 09:52:56,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-10-12 09:52:56,802 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:56,803 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:52:56,803 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 09:52:56,803 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:56,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:56,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1344922527, now seen corresponding path program 19 times [2020-10-12 09:52:56,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:56,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1466803392] [2020-10-12 09:52:56,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:56,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:56,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:56,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:56,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:56,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:01,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:01,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 191 [2020-10-12 09:53:01,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:53:01,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5093 [2020-10-12 09:53:01,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:01,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 09:53:01,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 93 [2020-10-12 09:53:01,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 09:53:01,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:02,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:02,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:02,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:02,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:02,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:02,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:02,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:02,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:02,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:02,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:02,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:02,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:02,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2020-10-12 09:53:02,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:02,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:02,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:02,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:53:02,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:02,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:53:02,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:02,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:02,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:53:02,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:02,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:02,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1448 backedges. 2 proven. 361 refuted. 0 times theorem prover too weak. 1085 trivial. 0 not checked. [2020-10-12 09:53:02,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1466803392] [2020-10-12 09:53:02,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:02,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 09:53:02,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059227349] [2020-10-12 09:53:02,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 09:53:02,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:02,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 09:53:02,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-12 09:53:02,249 INFO L87 Difference]: Start difference. First operand 185 states and 190 transitions. Second operand 23 states. [2020-10-12 09:53:02,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:02,756 INFO L93 Difference]: Finished difference Result 334 states and 346 transitions. [2020-10-12 09:53:02,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 09:53:02,760 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 181 [2020-10-12 09:53:02,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:02,762 INFO L225 Difference]: With dead ends: 334 [2020-10-12 09:53:02,762 INFO L226 Difference]: Without dead ends: 197 [2020-10-12 09:53:02,763 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-12 09:53:02,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-12 09:53:02,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 193. [2020-10-12 09:53:02,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-10-12 09:53:02,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 198 transitions. [2020-10-12 09:53:02,777 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 198 transitions. Word has length 181 [2020-10-12 09:53:02,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:02,778 INFO L479 AbstractCegarLoop]: Abstraction has 193 states and 198 transitions. [2020-10-12 09:53:02,778 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 09:53:02,778 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 198 transitions. [2020-10-12 09:53:02,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-10-12 09:53:02,779 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:02,779 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:53:02,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 09:53:02,779 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:02,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:02,779 INFO L82 PathProgramCache]: Analyzing trace with hash 138678617, now seen corresponding path program 20 times [2020-10-12 09:53:02,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:02,780 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [552410877] [2020-10-12 09:53:02,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:02,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:02,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:02,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:02,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:02,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:07,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:07,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 199 [2020-10-12 09:53:07,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:53:07,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 09:53:07,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:07,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 09:53:07,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-12 09:53:07,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 09:53:07,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:08,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:08,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:08,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:08,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:08,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:08,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:08,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:08,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:08,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:08,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:08,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:08,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:08,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2020-10-12 09:53:08,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:08,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:08,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:08,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:53:08,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:08,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:53:08,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:08,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:08,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:53:08,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:08,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:08,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1604 backedges. 2 proven. 400 refuted. 0 times theorem prover too weak. 1202 trivial. 0 not checked. [2020-10-12 09:53:08,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [552410877] [2020-10-12 09:53:08,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:08,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 09:53:08,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942726645] [2020-10-12 09:53:08,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 09:53:08,150 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:08,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 09:53:08,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-12 09:53:08,151 INFO L87 Difference]: Start difference. First operand 193 states and 198 transitions. Second operand 24 states. [2020-10-12 09:53:08,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:08,703 INFO L93 Difference]: Finished difference Result 348 states and 360 transitions. [2020-10-12 09:53:08,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 09:53:08,703 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 189 [2020-10-12 09:53:08,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:08,706 INFO L225 Difference]: With dead ends: 348 [2020-10-12 09:53:08,706 INFO L226 Difference]: Without dead ends: 205 [2020-10-12 09:53:08,707 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-12 09:53:08,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-10-12 09:53:08,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 201. [2020-10-12 09:53:08,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-10-12 09:53:08,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 206 transitions. [2020-10-12 09:53:08,724 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 206 transitions. Word has length 189 [2020-10-12 09:53:08,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:08,724 INFO L479 AbstractCegarLoop]: Abstraction has 201 states and 206 transitions. [2020-10-12 09:53:08,725 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 09:53:08,725 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 206 transitions. [2020-10-12 09:53:08,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-10-12 09:53:08,726 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:08,726 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:53:08,726 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 09:53:08,726 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:08,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:08,727 INFO L82 PathProgramCache]: Analyzing trace with hash 606793297, now seen corresponding path program 21 times [2020-10-12 09:53:08,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:08,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1802824843] [2020-10-12 09:53:08,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:08,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:08,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:08,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:08,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:08,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:13,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:13,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 207 [2020-10-12 09:53:13,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:53:13,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5198 [2020-10-12 09:53:13,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:13,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 09:53:13,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:53:13,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-12 09:53:13,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:14,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:14,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:14,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:14,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:14,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:14,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:14,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:53:14,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:14,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:14,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:14,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:14,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:53:14,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2020-10-12 09:53:14,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:14,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:14,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:14,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:53:14,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:14,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:14,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:14,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:14,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:53:14,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:14,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:53:14,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1768 backedges. 2 proven. 441 refuted. 0 times theorem prover too weak. 1325 trivial. 0 not checked. [2020-10-12 09:53:14,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1802824843] [2020-10-12 09:53:14,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:14,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 09:53:14,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815854835] [2020-10-12 09:53:14,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 09:53:14,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:14,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 09:53:14,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-12 09:53:14,479 INFO L87 Difference]: Start difference. First operand 201 states and 206 transitions. Second operand 25 states. [2020-10-12 09:53:15,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:15,167 INFO L93 Difference]: Finished difference Result 362 states and 374 transitions. [2020-10-12 09:53:15,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 09:53:15,168 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 197 [2020-10-12 09:53:15,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:15,169 INFO L225 Difference]: With dead ends: 362 [2020-10-12 09:53:15,169 INFO L226 Difference]: Without dead ends: 213 [2020-10-12 09:53:15,170 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-12 09:53:15,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-12 09:53:15,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 209. [2020-10-12 09:53:15,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-10-12 09:53:15,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 214 transitions. [2020-10-12 09:53:15,190 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 214 transitions. Word has length 197 [2020-10-12 09:53:15,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:15,190 INFO L479 AbstractCegarLoop]: Abstraction has 209 states and 214 transitions. [2020-10-12 09:53:15,190 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 09:53:15,190 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 214 transitions. [2020-10-12 09:53:15,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-10-12 09:53:15,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:15,192 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:53:15,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-12 09:53:15,195 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:15,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:15,196 INFO L82 PathProgramCache]: Analyzing trace with hash -277695671, now seen corresponding path program 22 times [2020-10-12 09:53:15,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:15,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1404941240] [2020-10-12 09:53:15,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:15,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:15,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:15,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:15,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:15,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:20,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:20,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 215 [2020-10-12 09:53:20,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:53:20,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5305 [2020-10-12 09:53:20,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:20,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 09:53:20,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:53:20,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-12 09:53:20,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:21,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:21,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:21,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:21,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:21,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:21,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:21,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:21,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:21,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:21,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:21,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:21,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:53:21,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 193 [2020-10-12 09:53:21,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:21,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:21,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:21,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:53:21,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:21,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:21,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:21,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:21,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:53:21,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:21,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:53:21,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1940 backedges. 2 proven. 484 refuted. 0 times theorem prover too weak. 1454 trivial. 0 not checked. [2020-10-12 09:53:21,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1404941240] [2020-10-12 09:53:21,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:21,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-12 09:53:21,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816627909] [2020-10-12 09:53:21,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-12 09:53:21,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:21,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-12 09:53:21,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-12 09:53:21,094 INFO L87 Difference]: Start difference. First operand 209 states and 214 transitions. Second operand 26 states. [2020-10-12 09:53:21,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:21,822 INFO L93 Difference]: Finished difference Result 376 states and 388 transitions. [2020-10-12 09:53:21,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 09:53:21,822 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 205 [2020-10-12 09:53:21,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:21,824 INFO L225 Difference]: With dead ends: 376 [2020-10-12 09:53:21,824 INFO L226 Difference]: Without dead ends: 221 [2020-10-12 09:53:21,825 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-12 09:53:21,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-12 09:53:21,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 217. [2020-10-12 09:53:21,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-10-12 09:53:21,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 222 transitions. [2020-10-12 09:53:21,844 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 222 transitions. Word has length 205 [2020-10-12 09:53:21,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:21,845 INFO L479 AbstractCegarLoop]: Abstraction has 217 states and 222 transitions. [2020-10-12 09:53:21,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-12 09:53:21,845 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 222 transitions. [2020-10-12 09:53:21,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2020-10-12 09:53:21,846 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:21,847 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:53:21,847 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-12 09:53:21,848 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:21,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:21,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1610833985, now seen corresponding path program 23 times [2020-10-12 09:53:21,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:21,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [262861671] [2020-10-12 09:53:21,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:21,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:21,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:21,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:21,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:21,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:26,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:26,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 223 [2020-10-12 09:53:26,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:53:26,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5120 [2020-10-12 09:53:26,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:26,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-12 09:53:26,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-12 09:53:26,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-12 09:53:26,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:27,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:27,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:27,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:27,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:27,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:27,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:27,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:27,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:27,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:27,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:27,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:27,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:27,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 201 [2020-10-12 09:53:27,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:27,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:27,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:27,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:53:27,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:27,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:27,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:27,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:27,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:53:27,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:27,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-12 09:53:27,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2120 backedges. 2 proven. 529 refuted. 0 times theorem prover too weak. 1589 trivial. 0 not checked. [2020-10-12 09:53:27,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [262861671] [2020-10-12 09:53:27,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:27,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-12 09:53:27,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037737150] [2020-10-12 09:53:27,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-12 09:53:27,542 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:27,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-12 09:53:27,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-12 09:53:27,543 INFO L87 Difference]: Start difference. First operand 217 states and 222 transitions. Second operand 27 states. [2020-10-12 09:53:28,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:28,178 INFO L93 Difference]: Finished difference Result 390 states and 402 transitions. [2020-10-12 09:53:28,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 09:53:28,179 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 213 [2020-10-12 09:53:28,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:28,181 INFO L225 Difference]: With dead ends: 390 [2020-10-12 09:53:28,182 INFO L226 Difference]: Without dead ends: 229 [2020-10-12 09:53:28,183 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-12 09:53:28,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-10-12 09:53:28,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 225. [2020-10-12 09:53:28,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2020-10-12 09:53:28,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 230 transitions. [2020-10-12 09:53:28,203 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 230 transitions. Word has length 213 [2020-10-12 09:53:28,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:28,203 INFO L479 AbstractCegarLoop]: Abstraction has 225 states and 230 transitions. [2020-10-12 09:53:28,203 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-12 09:53:28,203 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 230 transitions. [2020-10-12 09:53:28,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-10-12 09:53:28,205 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:28,205 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:53:28,205 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-12 09:53:28,205 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:28,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:28,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1975842105, now seen corresponding path program 24 times [2020-10-12 09:53:28,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:28,206 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [925482469] [2020-10-12 09:53:28,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:28,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:28,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:28,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:28,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:28,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:33,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:33,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 231 [2020-10-12 09:53:33,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:53:33,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-12 09:53:33,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:33,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 09:53:33,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 113 [2020-10-12 09:53:33,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-12 09:53:33,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:33,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:33,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:33,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:33,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:33,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:33,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:33,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:33,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:33,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:33,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:33,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:33,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:53:33,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2020-10-12 09:53:33,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:33,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:33,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:33,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:53:33,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:33,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:33,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:33,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:33,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:53:33,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:33,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:53:33,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2308 backedges. 2 proven. 576 refuted. 0 times theorem prover too weak. 1730 trivial. 0 not checked. [2020-10-12 09:53:33,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [925482469] [2020-10-12 09:53:33,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:33,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-12 09:53:33,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436002009] [2020-10-12 09:53:33,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-12 09:53:33,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:33,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-12 09:53:33,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-12 09:53:33,795 INFO L87 Difference]: Start difference. First operand 225 states and 230 transitions. Second operand 28 states. [2020-10-12 09:53:34,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:34,445 INFO L93 Difference]: Finished difference Result 404 states and 416 transitions. [2020-10-12 09:53:34,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 09:53:34,445 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 221 [2020-10-12 09:53:34,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:34,446 INFO L225 Difference]: With dead ends: 404 [2020-10-12 09:53:34,447 INFO L226 Difference]: Without dead ends: 237 [2020-10-12 09:53:34,447 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-12 09:53:34,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-12 09:53:34,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 233. [2020-10-12 09:53:34,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2020-10-12 09:53:34,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 238 transitions. [2020-10-12 09:53:34,465 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 238 transitions. Word has length 221 [2020-10-12 09:53:34,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:34,465 INFO L479 AbstractCegarLoop]: Abstraction has 233 states and 238 transitions. [2020-10-12 09:53:34,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-12 09:53:34,465 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 238 transitions. [2020-10-12 09:53:34,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2020-10-12 09:53:34,467 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:34,467 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 25, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:53:34,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-12 09:53:34,467 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:34,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:34,469 INFO L82 PathProgramCache]: Analyzing trace with hash 983527985, now seen corresponding path program 25 times [2020-10-12 09:53:34,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:34,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1342471615] [2020-10-12 09:53:34,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:34,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:34,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:34,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:34,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:34,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:39,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:39,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 239 [2020-10-12 09:53:39,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:53:39,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5235 [2020-10-12 09:53:39,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:39,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-12 09:53:39,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:53:39,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-12 09:53:39,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:40,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:40,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:40,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:40,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:40,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:40,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:40,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:40,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:40,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:40,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:40,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:40,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:53:40,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2020-10-12 09:53:40,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:40,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:40,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:40,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:53:40,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:40,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:40,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:40,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:40,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:53:40,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:40,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:53:40,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2504 backedges. 2 proven. 625 refuted. 0 times theorem prover too weak. 1877 trivial. 0 not checked. [2020-10-12 09:53:40,279 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1342471615] [2020-10-12 09:53:40,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:40,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-12 09:53:40,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824532140] [2020-10-12 09:53:40,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-12 09:53:40,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:40,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-12 09:53:40,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-12 09:53:40,282 INFO L87 Difference]: Start difference. First operand 233 states and 238 transitions. Second operand 29 states. [2020-10-12 09:53:41,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:41,000 INFO L93 Difference]: Finished difference Result 418 states and 430 transitions. [2020-10-12 09:53:41,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-12 09:53:41,001 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 229 [2020-10-12 09:53:41,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:41,003 INFO L225 Difference]: With dead ends: 418 [2020-10-12 09:53:41,004 INFO L226 Difference]: Without dead ends: 245 [2020-10-12 09:53:41,005 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-12 09:53:41,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-10-12 09:53:41,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 241. [2020-10-12 09:53:41,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-10-12 09:53:41,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 246 transitions. [2020-10-12 09:53:41,023 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 246 transitions. Word has length 229 [2020-10-12 09:53:41,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:41,024 INFO L479 AbstractCegarLoop]: Abstraction has 241 states and 246 transitions. [2020-10-12 09:53:41,024 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-12 09:53:41,024 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 246 transitions. [2020-10-12 09:53:41,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-10-12 09:53:41,025 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:41,026 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 26, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:53:41,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-12 09:53:41,026 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:41,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:41,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1032136919, now seen corresponding path program 26 times [2020-10-12 09:53:41,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:41,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1289559036] [2020-10-12 09:53:41,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:41,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:41,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:41,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:41,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:41,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:46,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:46,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 247 [2020-10-12 09:53:46,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:53:46,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5289 [2020-10-12 09:53:46,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:46,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-12 09:53:46,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-12 09:53:46,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-12 09:53:46,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:46,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:46,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:46,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:46,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:46,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:46,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:46,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:46,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:46,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:46,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:46,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:46,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:46,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 225 [2020-10-12 09:53:46,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:46,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:46,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:46,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:53:46,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:46,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:53:46,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:46,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:46,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:53:46,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:46,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:46,890 INFO L134 CoverageAnalysis]: Checked inductivity of 2708 backedges. 2 proven. 676 refuted. 0 times theorem prover too weak. 2030 trivial. 0 not checked. [2020-10-12 09:53:46,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1289559036] [2020-10-12 09:53:46,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:46,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-12 09:53:46,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523057492] [2020-10-12 09:53:46,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-12 09:53:46,892 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:46,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-12 09:53:46,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-12 09:53:46,892 INFO L87 Difference]: Start difference. First operand 241 states and 246 transitions. Second operand 30 states. [2020-10-12 09:53:47,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:47,630 INFO L93 Difference]: Finished difference Result 432 states and 444 transitions. [2020-10-12 09:53:47,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 09:53:47,631 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 237 [2020-10-12 09:53:47,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:47,632 INFO L225 Difference]: With dead ends: 432 [2020-10-12 09:53:47,632 INFO L226 Difference]: Without dead ends: 253 [2020-10-12 09:53:47,638 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-12 09:53:47,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-10-12 09:53:47,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 249. [2020-10-12 09:53:47,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-10-12 09:53:47,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 254 transitions. [2020-10-12 09:53:47,658 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 254 transitions. Word has length 237 [2020-10-12 09:53:47,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:47,658 INFO L479 AbstractCegarLoop]: Abstraction has 249 states and 254 transitions. [2020-10-12 09:53:47,658 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-12 09:53:47,658 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 254 transitions. [2020-10-12 09:53:47,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2020-10-12 09:53:47,660 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:47,660 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 27, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:53:47,660 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-12 09:53:47,661 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:47,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:47,661 INFO L82 PathProgramCache]: Analyzing trace with hash 725558305, now seen corresponding path program 27 times [2020-10-12 09:53:47,661 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:47,661 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1134676492] [2020-10-12 09:53:47,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:47,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:47,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:47,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:47,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:47,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:52,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:52,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 255 [2020-10-12 09:53:52,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:53:52,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5093 [2020-10-12 09:53:52,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:52,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-12 09:53:52,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 125 [2020-10-12 09:53:52,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-12 09:53:52,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:53,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:53,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:53,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:53,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:53,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:53,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:53,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:53,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:53,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:53,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:53,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:53,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:53,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 233 [2020-10-12 09:53:53,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:53,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:53,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:53,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:53:53,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:53,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:53:53,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:53,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:53,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:53:53,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:53,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:53,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2920 backedges. 2 proven. 729 refuted. 0 times theorem prover too weak. 2189 trivial. 0 not checked. [2020-10-12 09:53:53,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1134676492] [2020-10-12 09:53:53,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:53,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-12 09:53:53,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930840299] [2020-10-12 09:53:53,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-12 09:53:53,357 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:53,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-12 09:53:53,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-12 09:53:53,358 INFO L87 Difference]: Start difference. First operand 249 states and 254 transitions. Second operand 31 states. [2020-10-12 09:53:54,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:54,067 INFO L93 Difference]: Finished difference Result 446 states and 458 transitions. [2020-10-12 09:53:54,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 09:53:54,067 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 245 [2020-10-12 09:53:54,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:54,070 INFO L225 Difference]: With dead ends: 446 [2020-10-12 09:53:54,070 INFO L226 Difference]: Without dead ends: 261 [2020-10-12 09:53:54,071 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-12 09:53:54,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-10-12 09:53:54,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 257. [2020-10-12 09:53:54,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2020-10-12 09:53:54,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 262 transitions. [2020-10-12 09:53:54,092 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 262 transitions. Word has length 245 [2020-10-12 09:53:54,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:54,093 INFO L479 AbstractCegarLoop]: Abstraction has 257 states and 262 transitions. [2020-10-12 09:53:54,093 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-12 09:53:54,093 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 262 transitions. [2020-10-12 09:53:54,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2020-10-12 09:53:54,094 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:54,095 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 28, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:53:54,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-12 09:53:54,095 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:54,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:54,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1663805159, now seen corresponding path program 28 times [2020-10-12 09:53:54,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:54,096 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1540431533] [2020-10-12 09:53:54,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:54,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:54,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:54,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:54,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:54,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:59,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:59,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 263 [2020-10-12 09:53:59,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:53:59,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5408 [2020-10-12 09:53:59,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:59,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-12 09:53:59,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-12 09:53:59,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-12 09:53:59,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:00,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:54:00,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:00,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:00,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:00,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:54:00,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:00,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:54:00,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:00,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:00,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:54:00,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:00,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:00,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 241 [2020-10-12 09:54:00,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:00,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:00,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:00,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:54:00,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:00,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:54:00,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:00,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:00,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:54:00,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:00,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:00,160 INFO L134 CoverageAnalysis]: Checked inductivity of 3140 backedges. 2 proven. 784 refuted. 0 times theorem prover too weak. 2354 trivial. 0 not checked. [2020-10-12 09:54:00,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1540431533] [2020-10-12 09:54:00,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:54:00,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-12 09:54:00,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254155993] [2020-10-12 09:54:00,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-12 09:54:00,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:54:00,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-12 09:54:00,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-12 09:54:00,161 INFO L87 Difference]: Start difference. First operand 257 states and 262 transitions. Second operand 32 states. [2020-10-12 09:54:00,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:54:00,872 INFO L93 Difference]: Finished difference Result 460 states and 472 transitions. [2020-10-12 09:54:00,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-12 09:54:00,873 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 253 [2020-10-12 09:54:00,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:54:00,875 INFO L225 Difference]: With dead ends: 460 [2020-10-12 09:54:00,875 INFO L226 Difference]: Without dead ends: 269 [2020-10-12 09:54:00,876 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-12 09:54:00,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-12 09:54:00,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 265. [2020-10-12 09:54:00,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-10-12 09:54:00,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 270 transitions. [2020-10-12 09:54:00,896 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 270 transitions. Word has length 253 [2020-10-12 09:54:00,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:54:00,897 INFO L479 AbstractCegarLoop]: Abstraction has 265 states and 270 transitions. [2020-10-12 09:54:00,897 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-12 09:54:00,897 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 270 transitions. [2020-10-12 09:54:00,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2020-10-12 09:54:00,898 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:54:00,899 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 29, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:54:00,899 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-12 09:54:00,899 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:54:00,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:54:00,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1226995217, now seen corresponding path program 29 times [2020-10-12 09:54:00,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:54:00,900 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1116829715] [2020-10-12 09:54:00,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:54:00,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:00,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:00,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:01,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:01,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:06,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:06,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 271 [2020-10-12 09:54:06,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:54:06,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5330 [2020-10-12 09:54:06,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:06,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-12 09:54:06,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-12 09:54:06,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-12 09:54:06,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:06,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:54:06,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:06,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:06,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:06,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:54:06,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:06,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:54:06,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:06,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:06,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:54:06,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:06,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:06,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 249 [2020-10-12 09:54:06,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:06,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:06,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:06,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:54:06,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:06,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:54:06,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:06,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:06,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:54:06,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:06,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:06,911 INFO L134 CoverageAnalysis]: Checked inductivity of 3368 backedges. 2 proven. 841 refuted. 0 times theorem prover too weak. 2525 trivial. 0 not checked. [2020-10-12 09:54:06,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1116829715] [2020-10-12 09:54:06,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:54:06,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-12 09:54:06,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560677697] [2020-10-12 09:54:06,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-12 09:54:06,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:54:06,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-12 09:54:06,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 09:54:06,913 INFO L87 Difference]: Start difference. First operand 265 states and 270 transitions. Second operand 33 states. [2020-10-12 09:54:07,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:54:07,723 INFO L93 Difference]: Finished difference Result 474 states and 486 transitions. [2020-10-12 09:54:07,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-12 09:54:07,724 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 261 [2020-10-12 09:54:07,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:54:07,726 INFO L225 Difference]: With dead ends: 474 [2020-10-12 09:54:07,726 INFO L226 Difference]: Without dead ends: 277 [2020-10-12 09:54:07,728 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 09:54:07,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-10-12 09:54:07,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 273. [2020-10-12 09:54:07,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2020-10-12 09:54:07,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 278 transitions. [2020-10-12 09:54:07,750 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 278 transitions. Word has length 261 [2020-10-12 09:54:07,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:54:07,750 INFO L479 AbstractCegarLoop]: Abstraction has 273 states and 278 transitions. [2020-10-12 09:54:07,750 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-12 09:54:07,750 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 278 transitions. [2020-10-12 09:54:07,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2020-10-12 09:54:07,752 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:54:07,752 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 30, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:54:07,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-12 09:54:07,752 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:54:07,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:54:07,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1813084937, now seen corresponding path program 30 times [2020-10-12 09:54:07,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:54:07,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [698795864] [2020-10-12 09:54:07,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:54:07,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:07,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:07,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:07,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:07,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:12,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:12,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 279 [2020-10-12 09:54:12,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:54:12,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5153 [2020-10-12 09:54:12,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:12,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-12 09:54:12,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:54:12,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-12 09:54:12,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:13,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:54:13,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:13,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:13,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:13,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:54:13,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:13,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:54:13,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:13,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:13,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:54:13,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:13,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:13,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2020-10-12 09:54:13,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:13,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:13,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:13,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:54:13,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:13,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:54:13,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:13,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:13,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:54:13,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:13,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:13,588 INFO L134 CoverageAnalysis]: Checked inductivity of 3604 backedges. 2 proven. 900 refuted. 0 times theorem prover too weak. 2702 trivial. 0 not checked. [2020-10-12 09:54:13,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [698795864] [2020-10-12 09:54:13,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:54:13,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-12 09:54:13,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505451323] [2020-10-12 09:54:13,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-12 09:54:13,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:54:13,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-12 09:54:13,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 09:54:13,591 INFO L87 Difference]: Start difference. First operand 273 states and 278 transitions. Second operand 34 states. [2020-10-12 09:54:14,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:54:14,408 INFO L93 Difference]: Finished difference Result 488 states and 500 transitions. [2020-10-12 09:54:14,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-12 09:54:14,409 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 269 [2020-10-12 09:54:14,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:54:14,411 INFO L225 Difference]: With dead ends: 488 [2020-10-12 09:54:14,412 INFO L226 Difference]: Without dead ends: 285 [2020-10-12 09:54:14,413 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 09:54:14,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-10-12 09:54:14,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 281. [2020-10-12 09:54:14,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 281 states. [2020-10-12 09:54:14,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 286 transitions. [2020-10-12 09:54:14,434 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 286 transitions. Word has length 269 [2020-10-12 09:54:14,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:54:14,435 INFO L479 AbstractCegarLoop]: Abstraction has 281 states and 286 transitions. [2020-10-12 09:54:14,435 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-12 09:54:14,435 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 286 transitions. [2020-10-12 09:54:14,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2020-10-12 09:54:14,437 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:54:14,437 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:54:14,437 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-12 09:54:14,437 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:54:14,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:54:14,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1267296257, now seen corresponding path program 31 times [2020-10-12 09:54:14,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:54:14,438 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [887126050] [2020-10-12 09:54:14,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:54:14,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:14,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:14,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:14,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:14,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:19,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:19,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-12 09:54:19,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:54:19,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5356 [2020-10-12 09:54:19,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:19,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-12 09:54:19,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 77 [2020-10-12 09:54:19,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-12 09:54:19,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:20,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:54:20,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:20,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:20,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:20,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:54:20,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:20,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:54:20,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:20,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:20,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:54:20,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:20,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:20,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 265 [2020-10-12 09:54:20,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:20,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:20,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:20,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:54:20,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:20,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:54:20,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:20,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:20,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:54:20,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:20,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:20,531 INFO L134 CoverageAnalysis]: Checked inductivity of 3848 backedges. 2 proven. 961 refuted. 0 times theorem prover too weak. 2885 trivial. 0 not checked. [2020-10-12 09:54:20,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [887126050] [2020-10-12 09:54:20,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:54:20,532 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-12 09:54:20,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499641698] [2020-10-12 09:54:20,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-12 09:54:20,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:54:20,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-12 09:54:20,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 09:54:20,534 INFO L87 Difference]: Start difference. First operand 281 states and 286 transitions. Second operand 35 states. [2020-10-12 09:54:21,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:54:21,327 INFO L93 Difference]: Finished difference Result 502 states and 514 transitions. [2020-10-12 09:54:21,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-12 09:54:21,328 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 277 [2020-10-12 09:54:21,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:54:21,330 INFO L225 Difference]: With dead ends: 502 [2020-10-12 09:54:21,330 INFO L226 Difference]: Without dead ends: 293 [2020-10-12 09:54:21,331 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 09:54:21,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2020-10-12 09:54:21,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 289. [2020-10-12 09:54:21,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2020-10-12 09:54:21,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 294 transitions. [2020-10-12 09:54:21,352 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 294 transitions. Word has length 277 [2020-10-12 09:54:21,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:54:21,352 INFO L479 AbstractCegarLoop]: Abstraction has 289 states and 294 transitions. [2020-10-12 09:54:21,352 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-12 09:54:21,353 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 294 transitions. [2020-10-12 09:54:21,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2020-10-12 09:54:21,354 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:54:21,354 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 32, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:54:21,355 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-12 09:54:21,355 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:54:21,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:54:21,355 INFO L82 PathProgramCache]: Analyzing trace with hash 930233593, now seen corresponding path program 32 times [2020-10-12 09:54:21,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:54:21,356 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [613310153] [2020-10-12 09:54:21,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:54:21,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:21,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:21,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:21,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:21,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:26,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:26,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 295 [2020-10-12 09:54:26,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:54:26,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5320 [2020-10-12 09:54:26,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:26,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-12 09:54:26,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 145 [2020-10-12 09:54:26,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-12 09:54:26,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:27,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:54:27,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:27,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:27,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:27,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:54:27,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:27,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:54:27,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:27,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:27,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:54:27,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:27,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:27,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 273 [2020-10-12 09:54:27,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:27,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:27,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:27,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:54:27,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:27,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:54:27,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:27,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:27,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:54:27,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:27,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:27,477 INFO L134 CoverageAnalysis]: Checked inductivity of 4100 backedges. 2 proven. 1024 refuted. 0 times theorem prover too weak. 3074 trivial. 0 not checked. [2020-10-12 09:54:27,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [613310153] [2020-10-12 09:54:27,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:54:27,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-12 09:54:27,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965619673] [2020-10-12 09:54:27,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-12 09:54:27,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:54:27,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-12 09:54:27,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 09:54:27,479 INFO L87 Difference]: Start difference. First operand 289 states and 294 transitions. Second operand 36 states. [2020-10-12 09:54:28,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:54:28,326 INFO L93 Difference]: Finished difference Result 516 states and 528 transitions. [2020-10-12 09:54:28,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-12 09:54:28,327 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 285 [2020-10-12 09:54:28,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:54:28,329 INFO L225 Difference]: With dead ends: 516 [2020-10-12 09:54:28,329 INFO L226 Difference]: Without dead ends: 301 [2020-10-12 09:54:28,331 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 09:54:28,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2020-10-12 09:54:28,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 297. [2020-10-12 09:54:28,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2020-10-12 09:54:28,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 302 transitions. [2020-10-12 09:54:28,352 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 302 transitions. Word has length 285 [2020-10-12 09:54:28,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:54:28,353 INFO L479 AbstractCegarLoop]: Abstraction has 297 states and 302 transitions. [2020-10-12 09:54:28,353 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-12 09:54:28,353 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 302 transitions. [2020-10-12 09:54:28,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2020-10-12 09:54:28,355 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:54:28,355 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 33, 33, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:54:28,355 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-12 09:54:28,355 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:54:28,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:54:28,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1984693775, now seen corresponding path program 33 times [2020-10-12 09:54:28,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:54:28,356 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1585862367] [2020-10-12 09:54:28,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:54:28,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:28,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:28,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:28,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:28,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:33,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:33,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 303 [2020-10-12 09:54:33,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:54:33,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5366 [2020-10-12 09:54:33,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:33,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-12 09:54:33,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-12 09:54:33,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-12 09:54:33,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:34,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:54:34,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:34,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:34,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:34,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:54:34,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:34,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:54:34,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:34,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:34,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:54:34,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:34,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:34,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 281 [2020-10-12 09:54:34,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:34,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:34,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:34,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:54:34,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:34,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:54:34,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:34,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:34,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:54:34,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:34,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:34,590 INFO L134 CoverageAnalysis]: Checked inductivity of 4360 backedges. 2 proven. 1089 refuted. 0 times theorem prover too weak. 3269 trivial. 0 not checked. [2020-10-12 09:54:34,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1585862367] [2020-10-12 09:54:34,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:54:34,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-12 09:54:34,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056501391] [2020-10-12 09:54:34,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-12 09:54:34,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:54:34,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-12 09:54:34,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 09:54:34,592 INFO L87 Difference]: Start difference. First operand 297 states and 302 transitions. Second operand 37 states. [2020-10-12 09:54:35,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:54:35,356 INFO L93 Difference]: Finished difference Result 530 states and 542 transitions. [2020-10-12 09:54:35,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-12 09:54:35,357 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 293 [2020-10-12 09:54:35,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:54:35,360 INFO L225 Difference]: With dead ends: 530 [2020-10-12 09:54:35,360 INFO L226 Difference]: Without dead ends: 309 [2020-10-12 09:54:35,361 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 09:54:35,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2020-10-12 09:54:35,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 305. [2020-10-12 09:54:35,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2020-10-12 09:54:35,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 310 transitions. [2020-10-12 09:54:35,382 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 310 transitions. Word has length 293 [2020-10-12 09:54:35,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:54:35,383 INFO L479 AbstractCegarLoop]: Abstraction has 305 states and 310 transitions. [2020-10-12 09:54:35,383 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-12 09:54:35,383 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 310 transitions. [2020-10-12 09:54:35,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2020-10-12 09:54:35,384 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:54:35,385 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 34, 34, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:54:35,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-12 09:54:35,385 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:54:35,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:54:35,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1506369815, now seen corresponding path program 34 times [2020-10-12 09:54:35,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:54:35,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [446060985] [2020-10-12 09:54:35,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:54:35,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:35,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:35,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:35,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:35,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:40,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:40,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 311 [2020-10-12 09:54:40,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:54:40,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5057 [2020-10-12 09:54:40,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:40,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-12 09:54:40,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:54:40,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-12 09:54:40,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:41,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:54:41,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:41,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:41,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:41,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:54:41,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:41,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:54:41,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:41,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:41,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:54:41,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:41,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:41,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 289 [2020-10-12 09:54:41,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:41,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:41,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:41,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:54:41,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:41,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:54:41,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:41,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:41,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:54:41,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:41,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:41,342 INFO L134 CoverageAnalysis]: Checked inductivity of 4628 backedges. 2 proven. 1156 refuted. 0 times theorem prover too weak. 3470 trivial. 0 not checked. [2020-10-12 09:54:41,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [446060985] [2020-10-12 09:54:41,343 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:54:41,343 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-12 09:54:41,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912758671] [2020-10-12 09:54:41,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-12 09:54:41,344 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:54:41,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-12 09:54:41,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 09:54:41,345 INFO L87 Difference]: Start difference. First operand 305 states and 310 transitions. Second operand 38 states. [2020-10-12 09:54:42,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:54:42,199 INFO L93 Difference]: Finished difference Result 544 states and 556 transitions. [2020-10-12 09:54:42,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-12 09:54:42,200 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 301 [2020-10-12 09:54:42,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:54:42,202 INFO L225 Difference]: With dead ends: 544 [2020-10-12 09:54:42,202 INFO L226 Difference]: Without dead ends: 317 [2020-10-12 09:54:42,204 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 09:54:42,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2020-10-12 09:54:42,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 313. [2020-10-12 09:54:42,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 313 states. [2020-10-12 09:54:42,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 318 transitions. [2020-10-12 09:54:42,227 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 318 transitions. Word has length 301 [2020-10-12 09:54:42,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:54:42,227 INFO L479 AbstractCegarLoop]: Abstraction has 313 states and 318 transitions. [2020-10-12 09:54:42,228 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-12 09:54:42,228 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 318 transitions. [2020-10-12 09:54:42,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2020-10-12 09:54:42,230 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:54:42,230 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 35, 35, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:54:42,230 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-12 09:54:42,230 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:54:42,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:54:42,231 INFO L82 PathProgramCache]: Analyzing trace with hash -85840927, now seen corresponding path program 35 times [2020-10-12 09:54:42,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:54:42,231 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1676406333] [2020-10-12 09:54:42,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:54:42,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:42,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:42,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:42,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:42,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:47,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:47,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 319 [2020-10-12 09:54:47,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:54:47,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5218 [2020-10-12 09:54:47,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:47,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-12 09:54:47,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:54:47,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-12 09:54:47,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:48,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:54:48,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:48,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:48,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:48,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:54:48,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:48,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:54:48,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:48,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:48,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:54:48,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:48,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:48,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 297 [2020-10-12 09:54:48,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:48,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:48,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:48,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:54:48,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:48,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:54:48,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:48,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:48,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:54:48,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:48,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:48,423 INFO L134 CoverageAnalysis]: Checked inductivity of 4904 backedges. 2 proven. 1225 refuted. 0 times theorem prover too weak. 3677 trivial. 0 not checked. [2020-10-12 09:54:48,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1676406333] [2020-10-12 09:54:48,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:54:48,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-12 09:54:48,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626929004] [2020-10-12 09:54:48,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-12 09:54:48,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:54:48,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-12 09:54:48,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 09:54:48,426 INFO L87 Difference]: Start difference. First operand 313 states and 318 transitions. Second operand 39 states. [2020-10-12 09:54:49,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:54:49,419 INFO L93 Difference]: Finished difference Result 558 states and 570 transitions. [2020-10-12 09:54:49,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-12 09:54:49,420 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 309 [2020-10-12 09:54:49,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:54:49,423 INFO L225 Difference]: With dead ends: 558 [2020-10-12 09:54:49,423 INFO L226 Difference]: Without dead ends: 325 [2020-10-12 09:54:49,424 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 09:54:49,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2020-10-12 09:54:49,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 321. [2020-10-12 09:54:49,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 321 states. [2020-10-12 09:54:49,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 326 transitions. [2020-10-12 09:54:49,447 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 326 transitions. Word has length 309 [2020-10-12 09:54:49,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:54:49,447 INFO L479 AbstractCegarLoop]: Abstraction has 321 states and 326 transitions. [2020-10-12 09:54:49,448 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-12 09:54:49,448 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 326 transitions. [2020-10-12 09:54:49,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-10-12 09:54:49,450 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:54:49,450 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 36, 36, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:54:49,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-12 09:54:49,450 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:54:49,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:54:49,451 INFO L82 PathProgramCache]: Analyzing trace with hash -6381351, now seen corresponding path program 36 times [2020-10-12 09:54:49,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:54:49,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1602001154] [2020-10-12 09:54:49,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:54:49,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:49,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:49,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:49,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:49,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:54,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:54,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 327 [2020-10-12 09:54:54,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:54:54,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5173 [2020-10-12 09:54:54,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:54,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-12 09:54:54,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 161 [2020-10-12 09:54:54,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-12 09:54:54,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:55,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:54:55,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:55,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:55,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:55,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:54:55,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:55,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:54:55,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:55,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:55,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:54:55,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:55,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:55,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 305 [2020-10-12 09:54:55,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:55,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:55,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:55,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:54:55,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:55,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:54:55,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:55,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:55,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:54:55,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:55,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:55,624 INFO L134 CoverageAnalysis]: Checked inductivity of 5188 backedges. 2 proven. 1296 refuted. 0 times theorem prover too weak. 3890 trivial. 0 not checked. [2020-10-12 09:54:55,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1602001154] [2020-10-12 09:54:55,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:54:55,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-12 09:54:55,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789616172] [2020-10-12 09:54:55,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-12 09:54:55,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:54:55,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-12 09:54:55,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 09:54:55,626 INFO L87 Difference]: Start difference. First operand 321 states and 326 transitions. Second operand 40 states. [2020-10-12 09:54:56,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:54:56,484 INFO L93 Difference]: Finished difference Result 572 states and 584 transitions. [2020-10-12 09:54:56,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-12 09:54:56,484 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 317 [2020-10-12 09:54:56,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:54:56,487 INFO L225 Difference]: With dead ends: 572 [2020-10-12 09:54:56,487 INFO L226 Difference]: Without dead ends: 333 [2020-10-12 09:54:56,488 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 09:54:56,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2020-10-12 09:54:56,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 329. [2020-10-12 09:54:56,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 329 states. [2020-10-12 09:54:56,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 334 transitions. [2020-10-12 09:54:56,510 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 334 transitions. Word has length 317 [2020-10-12 09:54:56,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:54:56,511 INFO L479 AbstractCegarLoop]: Abstraction has 329 states and 334 transitions. [2020-10-12 09:54:56,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-12 09:54:56,511 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 334 transitions. [2020-10-12 09:54:56,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-10-12 09:54:56,513 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:54:56,513 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 37, 37, 37, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:54:56,514 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-12 09:54:56,514 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:54:56,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:54:56,514 INFO L82 PathProgramCache]: Analyzing trace with hash 911474129, now seen corresponding path program 37 times [2020-10-12 09:54:56,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:54:56,514 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [222025595] [2020-10-12 09:54:56,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:54:56,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:56,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:56,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:56,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:56,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking...