/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --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-fpi/ms1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 18:12:13,645 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 18:12:13,647 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 18:12:13,680 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 18:12:13,680 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 18:12:13,690 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 18:12:13,692 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 18:12:13,697 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 18:12:13,700 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 18:12:13,701 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 18:12:13,703 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 18:12:13,705 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 18:12:13,705 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 18:12:13,708 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 18:12:13,711 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 18:12:13,714 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 18:12:13,716 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 18:12:13,720 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 18:12:13,721 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 18:12:13,726 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 18:12:13,732 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 18:12:13,734 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 18:12:13,736 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 18:12:13,737 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 18:12:13,743 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 18:12:13,743 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 18:12:13,743 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 18:12:13,747 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 18:12:13,747 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 18:12:13,755 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 18:12:13,756 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 18:12:13,757 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 18:12:13,757 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 18:12:13,763 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 18:12:13,765 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 18:12:13,765 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 18:12:13,766 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 18:12:13,766 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 18:12:13,766 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 18:12:13,767 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 18:12:13,768 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 18:12:13,769 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 [2020-10-14 18:12:13,799 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 18:12:13,799 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 18:12:13,801 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 18:12:13,801 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 18:12:13,801 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 18:12:13,801 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 18:12:13,802 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 18:12:13,802 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 18:12:13,802 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 18:12:13,802 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 18:12:13,802 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 18:12:13,802 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 18:12:13,803 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 18:12:13,803 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 18:12:13,804 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 18:12:13,804 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 18:12:13,804 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 18:12:13,804 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 18:12:13,805 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 18:12:13,805 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 18:12:13,805 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 18:12:13,805 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 18:12:13,805 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 18:12:13,806 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 18:12:13,806 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 18:12:13,806 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 18:12:13,806 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 18:12:13,806 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 18:12:13,807 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 18:12:13,807 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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-14 18:12:14,183 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 18:12:14,208 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 18:12:14,213 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 18:12:14,218 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 18:12:14,219 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 18:12:14,220 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/ms1.c [2020-10-14 18:12:14,304 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8e0c5f390/f00dfd205de440f58f96762e4175f6ef/FLAG56bfc567b [2020-10-14 18:12:14,825 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 18:12:14,826 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/ms1.c [2020-10-14 18:12:14,835 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8e0c5f390/f00dfd205de440f58f96762e4175f6ef/FLAG56bfc567b [2020-10-14 18:12:15,194 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8e0c5f390/f00dfd205de440f58f96762e4175f6ef [2020-10-14 18:12:15,205 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 18:12:15,207 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 18:12:15,208 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 18:12:15,208 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 18:12:15,212 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 18:12:15,213 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 06:12:15" (1/1) ... [2020-10-14 18:12:15,216 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ee4d01a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:12:15, skipping insertion in model container [2020-10-14 18:12:15,216 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 06:12:15" (1/1) ... [2020-10-14 18:12:15,225 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 18:12:15,248 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 18:12:15,453 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 18:12:15,464 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 18:12:15,486 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 18:12:15,597 INFO L208 MainTranslator]: Completed translation [2020-10-14 18:12:15,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:12:15 WrapperNode [2020-10-14 18:12:15,597 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 18:12:15,598 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 18:12:15,598 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 18:12:15,599 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 18:12:15,613 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:12:15" (1/1) ... [2020-10-14 18:12:15,614 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:12:15" (1/1) ... [2020-10-14 18:12:15,623 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:12:15" (1/1) ... [2020-10-14 18:12:15,623 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:12:15" (1/1) ... [2020-10-14 18:12:15,631 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:12:15" (1/1) ... [2020-10-14 18:12:15,637 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:12:15" (1/1) ... [2020-10-14 18:12:15,639 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:12:15" (1/1) ... [2020-10-14 18:12:15,641 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 18:12:15,642 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 18:12:15,642 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 18:12:15,642 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 18:12:15,643 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:12:15" (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 [2020-10-14 18:12:15,710 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 18:12:15,711 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 18:12:15,711 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-14 18:12:15,711 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 18:12:15,711 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 18:12:15,711 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 18:12:15,711 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 18:12:15,712 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-14 18:12:15,713 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 18:12:15,713 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 18:12:15,713 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-14 18:12:15,713 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 18:12:15,713 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-14 18:12:15,713 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-14 18:12:15,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-14 18:12:15,714 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-14 18:12:15,715 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 18:12:15,715 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 18:12:15,715 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 18:12:16,008 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 18:12:16,009 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-14 18:12:16,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 06:12:16 BoogieIcfgContainer [2020-10-14 18:12:16,014 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 18:12:16,015 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 18:12:16,015 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 18:12:16,020 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 18:12:16,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 06:12:15" (1/3) ... [2020-10-14 18:12:16,021 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e7998ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 06:12:16, skipping insertion in model container [2020-10-14 18:12:16,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:12:15" (2/3) ... [2020-10-14 18:12:16,022 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e7998ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 06:12:16, skipping insertion in model container [2020-10-14 18:12:16,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 06:12:16" (3/3) ... [2020-10-14 18:12:16,024 INFO L109 eAbstractionObserver]: Analyzing ICFG ms1.c [2020-10-14 18:12:16,037 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 18:12:16,046 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 18:12:16,062 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 18:12:16,092 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 18:12:16,093 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 18:12:16,093 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 18:12:16,093 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 18:12:16,094 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 18:12:16,094 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 18:12:16,094 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 18:12:16,094 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 18:12:16,122 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-10-14 18:12:16,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-14 18:12:16,130 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:12:16,132 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] [2020-10-14 18:12:16,132 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:12:16,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:12:16,138 INFO L82 PathProgramCache]: Analyzing trace with hash -432131487, now seen corresponding path program 1 times [2020-10-14 18:12:16,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:12:16,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [127330164] [2020-10-14 18:12:16,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:12:16,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:16,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:16,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:16,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:16,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:16,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-14 18:12:16,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 18:12:16,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 561 [2020-10-14 18:12:16,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:16,847 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:16,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 18:12:16,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 18:12:16,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 18:12:16,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 18:12:16,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:12:16,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:16,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:16,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:16,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:12:16,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:16,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 18:12:16,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:16,945 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:16,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:12:16,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:16,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:12:16,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:12:16,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:12:16,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:16,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:16,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:16,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:16,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:12:16,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:12:16,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-14 18:12:16,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:16,977 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:16,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:12:16,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:16,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:12:16,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-14 18:12:16,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:12:16,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [127330164] [2020-10-14 18:12:16,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 18:12:16,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 18:12:17,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416715675] [2020-10-14 18:12:17,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 18:12:17,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:12:17,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 18:12:17,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 18:12:17,025 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 5 states. [2020-10-14 18:12:17,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:12:17,238 INFO L93 Difference]: Finished difference Result 60 states and 76 transitions. [2020-10-14 18:12:17,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 18:12:17,240 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-10-14 18:12:17,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:12:17,249 INFO L225 Difference]: With dead ends: 60 [2020-10-14 18:12:17,249 INFO L226 Difference]: Without dead ends: 27 [2020-10-14 18:12:17,253 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-14 18:12:17,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-14 18:12:17,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-14 18:12:17,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-14 18:12:17,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-10-14 18:12:17,289 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 21 [2020-10-14 18:12:17,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:12:17,290 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-10-14 18:12:17,290 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 18:12:17,290 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-10-14 18:12:17,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 18:12:17,292 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:12:17,292 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] [2020-10-14 18:12:17,293 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 18:12:17,293 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:12:17,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:12:17,293 INFO L82 PathProgramCache]: Analyzing trace with hash -445719797, now seen corresponding path program 1 times [2020-10-14 18:12:17,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:12:17,294 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [352474840] [2020-10-14 18:12:17,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:12:17,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:17,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:17,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:17,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 18:12:17,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:17,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 148 [2020-10-14 18:12:17,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:17,462 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:17,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 18:12:17,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-14 18:12:17,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 18:12:17,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 18:12:17,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:12:17,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:17,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:17,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:17,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:12:17,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:17,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 18:12:17,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:17,558 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:17,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:12:17,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:17,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:12:17,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:12:17,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:12:17,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:17,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:17,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:17,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:12:17,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:17,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 18:12:17,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:17,575 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:17,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:12:17,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:17,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:12:17,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:12:17,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 18:12:17,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [352474840] [2020-10-14 18:12:17,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 18:12:17,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-14 18:12:17,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968901119] [2020-10-14 18:12:17,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 18:12:17,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:12:17,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 18:12:17,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 18:12:17,587 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 7 states. [2020-10-14 18:12:17,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:12:17,743 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2020-10-14 18:12:17,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 18:12:17,744 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-10-14 18:12:17,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:12:17,745 INFO L225 Difference]: With dead ends: 36 [2020-10-14 18:12:17,745 INFO L226 Difference]: Without dead ends: 30 [2020-10-14 18:12:17,746 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-14 18:12:17,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-14 18:12:17,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2020-10-14 18:12:17,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-14 18:12:17,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-10-14 18:12:17,754 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 26 [2020-10-14 18:12:17,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:12:17,754 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-10-14 18:12:17,754 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 18:12:17,755 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-10-14 18:12:17,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 18:12:17,756 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:12:17,756 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] [2020-10-14 18:12:17,756 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 18:12:17,756 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:12:17,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:12:17,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1255066423, now seen corresponding path program 1 times [2020-10-14 18:12:17,757 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:12:17,758 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1748473300] [2020-10-14 18:12:17,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:12:17,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:17,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:17,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:17,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:18,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:18,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 18:12:18,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 18:12:18,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 499 [2020-10-14 18:12:18,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:18,273 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:18,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 18:12:18,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 18:12:18,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 18:12:18,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:12:18,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:12:18,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:18,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:18,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:18,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:12:18,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:18,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:12:18,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:18,479 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:18,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:12:18,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:18,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:12:18,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:12:18,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:12:18,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:18,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:18,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:18,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:12:18,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:18,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 18:12:18,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:18,491 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:18,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:12:18,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:18,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:12:18,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:12:18,496 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:12:18,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1748473300] [2020-10-14 18:12:18,497 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:12:18,497 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 18:12:18,497 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780670061] [2020-10-14 18:12:18,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 18:12:18,498 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:12:18,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 18:12:18,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-14 18:12:18,499 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 9 states. [2020-10-14 18:12:18,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:12:18,668 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2020-10-14 18:12:18,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 18:12:18,669 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-10-14 18:12:18,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:12:18,670 INFO L225 Difference]: With dead ends: 56 [2020-10-14 18:12:18,670 INFO L226 Difference]: Without dead ends: 43 [2020-10-14 18:12:18,671 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-10-14 18:12:18,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-14 18:12:18,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-10-14 18:12:18,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-14 18:12:18,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2020-10-14 18:12:18,679 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 26 [2020-10-14 18:12:18,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:12:18,679 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2020-10-14 18:12:18,679 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 18:12:18,680 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-10-14 18:12:18,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 18:12:18,681 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:12:18,681 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] [2020-10-14 18:12:18,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 18:12:18,681 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:12:18,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:12:18,682 INFO L82 PathProgramCache]: Analyzing trace with hash -278067577, now seen corresponding path program 2 times [2020-10-14 18:12:18,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:12:18,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1958117184] [2020-10-14 18:12:18,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:12:18,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:18,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:18,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:18,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:18,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 18:12:18,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:12:18,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 131 [2020-10-14 18:12:18,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:18,827 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:18,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 18:12:18,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:12:18,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 18:12:18,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:12:18,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:12:18,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:18,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:18,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:18,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:12:18,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:18,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:12:18,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:18,888 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:18,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:12:18,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:18,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:12:18,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:12:18,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:12:18,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:18,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:18,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:18,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:12:18,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:18,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:12:18,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:18,897 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:18,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:12:18,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:18,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:12:18,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:12:18,900 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:12:18,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1958117184] [2020-10-14 18:12:18,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:12:18,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 18:12:18,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738762434] [2020-10-14 18:12:18,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 18:12:18,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:12:18,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 18:12:18,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-14 18:12:18,903 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 8 states. [2020-10-14 18:12:19,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:12:19,090 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2020-10-14 18:12:19,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 18:12:19,091 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-10-14 18:12:19,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:12:19,092 INFO L225 Difference]: With dead ends: 45 [2020-10-14 18:12:19,092 INFO L226 Difference]: Without dead ends: 32 [2020-10-14 18:12:19,093 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2020-10-14 18:12:19,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-14 18:12:19,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-14 18:12:19,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-14 18:12:19,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-10-14 18:12:19,099 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 28 [2020-10-14 18:12:19,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:12:19,100 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-10-14 18:12:19,100 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 18:12:19,100 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-10-14 18:12:19,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-14 18:12:19,101 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:12:19,101 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:12:19,101 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 18:12:19,102 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:12:19,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:12:19,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1246872481, now seen corresponding path program 1 times [2020-10-14 18:12:19,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:12:19,103 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [401977510] [2020-10-14 18:12:19,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:12:19,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:19,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:19,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:19,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:19,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-14 18:12:19,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:12:19,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 612 [2020-10-14 18:12:19,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:19,732 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:19,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 18:12:19,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:12:19,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 18:12:19,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:12:19,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:12:19,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:19,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:19,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:19,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:12:19,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:19,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:12:19,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:19,895 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:19,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:12:19,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:19,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:12:19,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:12:19,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:12:19,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:19,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:19,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:19,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:12:19,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:19,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:12:19,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:19,902 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:19,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:12:19,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:19,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:12:19,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:12:19,907 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:12:19,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [401977510] [2020-10-14 18:12:19,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:12:19,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 18:12:19,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19349620] [2020-10-14 18:12:19,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 18:12:19,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:12:19,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 18:12:19,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-14 18:12:19,910 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 12 states. [2020-10-14 18:12:20,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:12:20,256 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-10-14 18:12:20,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 18:12:20,257 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2020-10-14 18:12:20,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:12:20,258 INFO L225 Difference]: With dead ends: 43 [2020-10-14 18:12:20,258 INFO L226 Difference]: Without dead ends: 37 [2020-10-14 18:12:20,259 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2020-10-14 18:12:20,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-14 18:12:20,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-10-14 18:12:20,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-14 18:12:20,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-10-14 18:12:20,265 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 31 [2020-10-14 18:12:20,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:12:20,266 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-10-14 18:12:20,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 18:12:20,266 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-10-14 18:12:20,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-14 18:12:20,267 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:12:20,267 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-14 18:12:20,267 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 18:12:20,267 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:12:20,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:12:20,268 INFO L82 PathProgramCache]: Analyzing trace with hash -726852151, now seen corresponding path program 2 times [2020-10-14 18:12:20,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:12:20,268 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [263915592] [2020-10-14 18:12:20,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:12:20,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:20,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:20,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:20,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:20,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:20,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:20,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:20,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:21,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:22,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:22,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:22,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-14 18:12:22,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 18:12:22,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2532 [2020-10-14 18:12:22,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:22,815 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:22,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 18:12:22,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 18:12:22,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 18:12:22,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:12:22,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:12:22,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:22,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:22,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:22,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:12:22,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:22,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:12:22,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:22,992 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:22,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:12:22,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:22,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:12:22,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:12:22,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:12:22,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:22,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:22,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:22,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:12:22,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:22,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:12:22,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:23,000 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:23,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:12:23,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:23,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:12:23,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:12:23,004 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 18:12:23,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [263915592] [2020-10-14 18:12:23,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:12:23,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 18:12:23,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56417534] [2020-10-14 18:12:23,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 18:12:23,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:12:23,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 18:12:23,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-14 18:12:23,007 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 13 states. [2020-10-14 18:12:23,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:12:23,424 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2020-10-14 18:12:23,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 18:12:23,425 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2020-10-14 18:12:23,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:12:23,426 INFO L225 Difference]: With dead ends: 57 [2020-10-14 18:12:23,426 INFO L226 Difference]: Without dead ends: 40 [2020-10-14 18:12:23,427 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2020-10-14 18:12:23,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-14 18:12:23,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2020-10-14 18:12:23,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-14 18:12:23,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2020-10-14 18:12:23,433 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2020-10-14 18:12:23,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:12:23,433 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2020-10-14 18:12:23,433 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 18:12:23,434 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2020-10-14 18:12:23,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 18:12:23,434 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:12:23,435 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:12:23,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 18:12:23,435 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:12:23,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:12:23,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1923985017, now seen corresponding path program 3 times [2020-10-14 18:12:23,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:12:23,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [782987046] [2020-10-14 18:12:23,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:12:23,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:23,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:23,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:24,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:24,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:24,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 18:12:24,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 18:12:24,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1290 [2020-10-14 18:12:24,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:24,741 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:24,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 18:12:24,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:12:24,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 18:12:24,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:12:25,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:12:25,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:25,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:25,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:25,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:12:25,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:25,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:12:25,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:25,090 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:25,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:12:25,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:25,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:12:25,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:12:25,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:12:25,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:25,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:25,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:25,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:12:25,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:25,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:12:25,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:25,102 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:25,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:12:25,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:25,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:12:25,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:12:25,110 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:12:25,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [782987046] [2020-10-14 18:12:25,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:12:25,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 18:12:25,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695770646] [2020-10-14 18:12:25,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 18:12:25,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:12:25,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 18:12:25,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2020-10-14 18:12:25,113 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 16 states. [2020-10-14 18:12:25,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:12:25,761 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2020-10-14 18:12:25,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 18:12:25,762 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 36 [2020-10-14 18:12:25,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:12:25,763 INFO L225 Difference]: With dead ends: 48 [2020-10-14 18:12:25,763 INFO L226 Difference]: Without dead ends: 42 [2020-10-14 18:12:25,764 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2020-10-14 18:12:25,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-14 18:12:25,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2020-10-14 18:12:25,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-14 18:12:25,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2020-10-14 18:12:25,776 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 36 [2020-10-14 18:12:25,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:12:25,776 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2020-10-14 18:12:25,776 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 18:12:25,776 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2020-10-14 18:12:25,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-14 18:12:25,778 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:12:25,778 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:12:25,778 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 18:12:25,779 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:12:25,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:12:25,779 INFO L82 PathProgramCache]: Analyzing trace with hash -231866845, now seen corresponding path program 4 times [2020-10-14 18:12:25,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:12:25,780 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1673686966] [2020-10-14 18:12:25,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:12:25,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:25,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:25,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:25,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:26,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:26,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:26,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:26,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:26,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:28,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:30,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:30,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:30,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-14 18:12:30,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-14 18:12:30,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 18:12:30,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:30,798 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:30,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 18:12:30,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 18:12:30,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 18:12:30,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:12:31,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:12:31,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:31,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:31,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:31,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:12:31,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:31,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:12:31,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:31,099 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:31,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:12:31,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:31,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:12:31,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:12:31,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:12:31,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:31,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:31,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:31,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:12:31,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:31,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 18:12:31,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:31,110 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:31,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:12:31,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:31,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:12:31,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:12:31,116 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 18:12:31,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1673686966] [2020-10-14 18:12:31,116 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:12:31,117 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 18:12:31,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707054087] [2020-10-14 18:12:31,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 18:12:31,118 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:12:31,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 18:12:31,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-14 18:12:31,118 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 16 states. [2020-10-14 18:12:31,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:12:31,819 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2020-10-14 18:12:31,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 18:12:31,820 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 39 [2020-10-14 18:12:31,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:12:31,821 INFO L225 Difference]: With dead ends: 65 [2020-10-14 18:12:31,821 INFO L226 Difference]: Without dead ends: 45 [2020-10-14 18:12:31,822 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=243, Invalid=749, Unknown=0, NotChecked=0, Total=992 [2020-10-14 18:12:31,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-14 18:12:31,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2020-10-14 18:12:31,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-14 18:12:31,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-10-14 18:12:31,837 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 39 [2020-10-14 18:12:31,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:12:31,837 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-10-14 18:12:31,837 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 18:12:31,837 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-10-14 18:12:31,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-14 18:12:31,840 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:12:31,840 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:12:31,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 18:12:31,840 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:12:31,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:12:31,841 INFO L82 PathProgramCache]: Analyzing trace with hash 604598565, now seen corresponding path program 5 times [2020-10-14 18:12:31,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:12:31,842 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [220643542] [2020-10-14 18:12:31,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:12:31,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:31,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:32,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:33,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:33,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:33,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:33,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-14 18:12:33,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:12:33,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1901 [2020-10-14 18:12:33,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:33,760 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:33,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 18:12:33,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:12:33,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 18:12:33,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:12:34,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:12:34,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:34,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:34,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:34,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:12:34,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:34,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:12:34,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:34,480 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:34,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:12:34,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:34,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:12:34,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:12:34,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:12:34,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:34,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:34,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:34,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:12:34,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:34,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:12:34,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:34,486 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:34,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:12:34,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:34,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:12:34,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:12:34,500 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:12:34,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [220643542] [2020-10-14 18:12:34,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:12:34,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 18:12:34,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888008003] [2020-10-14 18:12:34,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 18:12:34,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:12:34,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 18:12:34,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2020-10-14 18:12:34,510 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 20 states. [2020-10-14 18:12:35,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:12:35,462 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2020-10-14 18:12:35,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 18:12:35,462 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 41 [2020-10-14 18:12:35,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:12:35,463 INFO L225 Difference]: With dead ends: 53 [2020-10-14 18:12:35,463 INFO L226 Difference]: Without dead ends: 47 [2020-10-14 18:12:35,466 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=122, Invalid=748, Unknown=0, NotChecked=0, Total=870 [2020-10-14 18:12:35,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-14 18:12:35,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2020-10-14 18:12:35,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-14 18:12:35,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-10-14 18:12:35,475 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 41 [2020-10-14 18:12:35,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:12:35,476 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-10-14 18:12:35,476 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 18:12:35,476 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-10-14 18:12:35,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-14 18:12:35,478 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:12:35,478 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:12:35,478 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 18:12:35,478 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:12:35,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:12:35,479 INFO L82 PathProgramCache]: Analyzing trace with hash -629780027, now seen corresponding path program 6 times [2020-10-14 18:12:35,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:12:35,479 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1945009495] [2020-10-14 18:12:35,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:12:35,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:35,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:35,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:35,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:35,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:35,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:35,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:35,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:35,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:36,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:38,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:39,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:39,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:40,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:40,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:40,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-14 18:12:40,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-14 18:12:40,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4783 [2020-10-14 18:12:40,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:40,276 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:40,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 18:12:40,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 18:12:40,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-14 18:12:40,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:12:40,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:12:40,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:40,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:40,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:40,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:12:40,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:40,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:12:40,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:40,578 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:40,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:12:40,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:40,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:12:40,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:12:40,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:12:40,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:40,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:40,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:40,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:12:40,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:40,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:12:40,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:40,584 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:40,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:12:40,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:40,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:12:40,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:12:40,591 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 18:12:40,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1945009495] [2020-10-14 18:12:40,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:12:40,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 18:12:40,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205543081] [2020-10-14 18:12:40,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 18:12:40,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:12:40,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 18:12:40,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-10-14 18:12:40,594 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 19 states. [2020-10-14 18:12:41,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:12:41,336 INFO L93 Difference]: Finished difference Result 73 states and 75 transitions. [2020-10-14 18:12:41,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-14 18:12:41,336 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 44 [2020-10-14 18:12:41,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:12:41,337 INFO L225 Difference]: With dead ends: 73 [2020-10-14 18:12:41,337 INFO L226 Difference]: Without dead ends: 50 [2020-10-14 18:12:41,338 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=348, Invalid=1134, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 18:12:41,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-14 18:12:41,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2020-10-14 18:12:41,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-14 18:12:41,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-10-14 18:12:41,345 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 44 [2020-10-14 18:12:41,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:12:41,346 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-10-14 18:12:41,346 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 18:12:41,346 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-10-14 18:12:41,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-14 18:12:41,347 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:12:41,347 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:12:41,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 18:12:41,347 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:12:41,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:12:41,348 INFO L82 PathProgramCache]: Analyzing trace with hash -634097661, now seen corresponding path program 7 times [2020-10-14 18:12:41,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:12:41,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [34094482] [2020-10-14 18:12:41,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:12:41,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:41,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:41,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:41,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:42,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:43,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:44,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:44,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-14 18:12:44,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 18:12:44,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3221 [2020-10-14 18:12:44,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:44,583 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:44,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 18:12:44,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:12:44,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-14 18:12:44,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:12:45,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:12:45,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:45,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:45,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:45,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:12:45,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:45,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:12:45,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:45,722 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:45,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:12:45,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:45,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:12:45,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:12:45,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:12:45,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:45,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:45,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:45,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:12:45,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:45,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:12:45,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:45,728 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:45,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:12:45,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:45,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:12:45,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:12:45,744 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:12:45,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [34094482] [2020-10-14 18:12:45,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:12:45,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 18:12:45,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810361856] [2020-10-14 18:12:45,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 18:12:45,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:12:45,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 18:12:45,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2020-10-14 18:12:45,747 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 24 states. [2020-10-14 18:12:46,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:12:46,970 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-10-14 18:12:46,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 18:12:46,971 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2020-10-14 18:12:46,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:12:46,972 INFO L225 Difference]: With dead ends: 58 [2020-10-14 18:12:46,972 INFO L226 Difference]: Without dead ends: 52 [2020-10-14 18:12:46,973 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=157, Invalid=1033, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 18:12:46,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-14 18:12:46,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2020-10-14 18:12:46,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-14 18:12:46,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2020-10-14 18:12:46,980 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 46 [2020-10-14 18:12:46,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:12:46,981 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2020-10-14 18:12:46,981 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 18:12:46,981 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2020-10-14 18:12:46,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-14 18:12:46,982 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:12:46,982 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:12:46,982 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 18:12:46,982 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:12:46,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:12:46,983 INFO L82 PathProgramCache]: Analyzing trace with hash -270041561, now seen corresponding path program 8 times [2020-10-14 18:12:46,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:12:46,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1284312132] [2020-10-14 18:12:46,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:12:46,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:46,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:47,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:47,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:47,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:47,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:47,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:47,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:47,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:47,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:47,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:49,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:51,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:51,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-14 18:12:51,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-14 18:12:51,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 18:12:51,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:51,997 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:51,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 18:12:51,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:12:51,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 18:12:51,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:12:52,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:12:52,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:52,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:52,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:52,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:12:52,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:52,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:12:52,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:52,271 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:52,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:12:52,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:52,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:12:52,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:12:52,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:12:52,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:52,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:52,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:52,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:12:52,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:52,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:12:52,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:52,276 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:52,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:12:52,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:52,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:12:52,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:12:52,283 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 18:12:52,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1284312132] [2020-10-14 18:12:52,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:12:52,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 18:12:52,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534954373] [2020-10-14 18:12:52,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 18:12:52,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:12:52,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 18:12:52,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2020-10-14 18:12:52,286 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 18 states. [2020-10-14 18:12:53,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:12:53,277 INFO L93 Difference]: Finished difference Result 82 states and 84 transitions. [2020-10-14 18:12:53,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 18:12:53,277 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 49 [2020-10-14 18:12:53,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:12:53,279 INFO L225 Difference]: With dead ends: 82 [2020-10-14 18:12:53,279 INFO L226 Difference]: Without dead ends: 55 [2020-10-14 18:12:53,280 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=181, Invalid=875, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 18:12:53,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-14 18:12:53,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2020-10-14 18:12:53,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-14 18:12:53,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2020-10-14 18:12:53,294 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 49 [2020-10-14 18:12:53,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:12:53,294 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2020-10-14 18:12:53,295 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 18:12:53,295 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2020-10-14 18:12:53,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-14 18:12:53,296 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:12:53,296 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:12:53,296 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 18:12:53,296 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:12:53,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:12:53,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1307011415, now seen corresponding path program 9 times [2020-10-14 18:12:53,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:12:53,297 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [350633984] [2020-10-14 18:12:53,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:12:53,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:53,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:53,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:53,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:54,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:54,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:55,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:56,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:56,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-14 18:12:56,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 18:12:56,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3119 [2020-10-14 18:12:56,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:56,434 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:56,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 18:12:56,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:12:56,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 18:12:56,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:12:57,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:12:57,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:57,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:57,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:57,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:12:57,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:57,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:12:57,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:57,433 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:57,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:12:57,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:57,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:12:57,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:12:57,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:12:57,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:57,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:57,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:57,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:12:57,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:57,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:12:57,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:57,438 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:57,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:12:57,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:57,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:12:57,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:12:57,459 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:12:57,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [350633984] [2020-10-14 18:12:57,459 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:12:57,460 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-14 18:12:57,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807603589] [2020-10-14 18:12:57,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-14 18:12:57,461 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:12:57,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-14 18:12:57,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2020-10-14 18:12:57,461 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 28 states. [2020-10-14 18:12:58,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:12:58,977 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2020-10-14 18:12:58,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-14 18:12:58,978 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 51 [2020-10-14 18:12:58,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:12:58,979 INFO L225 Difference]: With dead ends: 63 [2020-10-14 18:12:58,979 INFO L226 Difference]: Without dead ends: 57 [2020-10-14 18:12:58,980 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=173, Invalid=1309, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 18:12:58,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-14 18:12:58,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2020-10-14 18:12:58,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-14 18:12:58,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2020-10-14 18:12:58,998 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 51 [2020-10-14 18:12:58,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:12:58,999 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2020-10-14 18:12:58,999 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-14 18:12:58,999 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2020-10-14 18:12:59,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-14 18:12:59,000 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:12:59,000 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:12:59,000 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 18:12:59,000 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:12:59,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:12:59,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1863650753, now seen corresponding path program 10 times [2020-10-14 18:12:59,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:12:59,001 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [526300857] [2020-10-14 18:12:59,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:12:59,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:59,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:59,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:59,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:59,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:59,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:59,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:59,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:59,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:59,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:59,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:59,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:01,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:01,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:04,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:04,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-14 18:13:04,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-14 18:13:04,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 18:13:04,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:04,011 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:04,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 18:13:04,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:13:04,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-14 18:13:04,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:04,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:13:04,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:04,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:04,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:04,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:13:04,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:13:04,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:13:04,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:04,325 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:04,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:13:04,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:13:04,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:13:04,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:04,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:13:04,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:04,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:04,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:04,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:13:04,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:13:04,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:13:04,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:04,329 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:04,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:13:04,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:13:04,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:13:04,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:04,336 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 18:13:04,336 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [526300857] [2020-10-14 18:13:04,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:13:04,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 18:13:04,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471148760] [2020-10-14 18:13:04,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 18:13:04,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:13:04,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 18:13:04,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2020-10-14 18:13:04,338 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 20 states. [2020-10-14 18:13:05,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:13:05,519 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2020-10-14 18:13:05,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 18:13:05,520 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 54 [2020-10-14 18:13:05,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:13:05,521 INFO L225 Difference]: With dead ends: 90 [2020-10-14 18:13:05,521 INFO L226 Difference]: Without dead ends: 60 [2020-10-14 18:13:05,523 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=213, Invalid=1119, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 18:13:05,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-14 18:13:05,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2020-10-14 18:13:05,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-14 18:13:05,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-10-14 18:13:05,531 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 54 [2020-10-14 18:13:05,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:13:05,531 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-10-14 18:13:05,531 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 18:13:05,531 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-10-14 18:13:05,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-14 18:13:05,532 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:13:05,532 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:13:05,532 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 18:13:05,533 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:13:05,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:13:05,533 INFO L82 PathProgramCache]: Analyzing trace with hash 900265599, now seen corresponding path program 11 times [2020-10-14 18:13:05,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:13:05,533 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1884651603] [2020-10-14 18:13:05,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:13:05,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:05,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:05,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:06,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:07,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:08,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:08,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:09,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:09,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:09,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-14 18:13:09,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 18:13:09,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4225 [2020-10-14 18:13:09,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:09,772 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:09,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-14 18:13:09,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:13:09,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-14 18:13:09,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:11,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:13:11,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:11,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:11,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:11,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:13:11,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:13:11,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:13:11,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:11,222 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:11,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:13:11,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:13:11,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:13:11,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:11,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:13:11,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:11,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:11,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:11,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:13:11,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:13:11,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:13:11,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:11,225 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:11,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:13:11,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:13:11,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:13:11,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:11,249 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:13:11,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1884651603] [2020-10-14 18:13:11,250 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:13:11,250 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-14 18:13:11,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983624355] [2020-10-14 18:13:11,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-14 18:13:11,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:13:11,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-14 18:13:11,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=878, Unknown=0, NotChecked=0, Total=992 [2020-10-14 18:13:11,251 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 32 states. [2020-10-14 18:13:13,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:13:13,391 INFO L93 Difference]: Finished difference Result 68 states and 69 transitions. [2020-10-14 18:13:13,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-14 18:13:13,392 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 56 [2020-10-14 18:13:13,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:13:13,393 INFO L225 Difference]: With dead ends: 68 [2020-10-14 18:13:13,393 INFO L226 Difference]: Without dead ends: 62 [2020-10-14 18:13:13,395 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=233, Invalid=1747, Unknown=0, NotChecked=0, Total=1980 [2020-10-14 18:13:13,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-14 18:13:13,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2020-10-14 18:13:13,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-14 18:13:13,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-10-14 18:13:13,402 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 56 [2020-10-14 18:13:13,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:13:13,403 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-10-14 18:13:13,403 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-14 18:13:13,403 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-10-14 18:13:13,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-14 18:13:13,404 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:13:13,404 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:13:13,404 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 18:13:13,404 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:13:13,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:13:13,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1391094229, now seen corresponding path program 12 times [2020-10-14 18:13:13,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:13:13,405 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [85639120] [2020-10-14 18:13:13,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:13:13,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:13,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:13,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:13,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:13,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:13,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:13,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:13,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:13,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:14,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:14,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:14,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:14,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:18,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:18,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-14 18:13:18,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-14 18:13:18,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 18:13:18,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:18,417 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:18,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 18:13:18,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:13:18,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 18:13:18,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:18,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:13:18,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:18,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:18,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:18,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:13:18,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:13:18,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:13:18,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:18,813 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:18,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:13:18,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:13:18,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:13:18,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:18,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:13:18,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:18,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:18,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:18,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:13:18,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:13:18,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:13:18,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:18,816 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:18,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:13:18,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:13:18,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:13:18,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:18,823 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 139 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 18:13:18,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [85639120] [2020-10-14 18:13:18,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:13:18,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 18:13:18,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354406862] [2020-10-14 18:13:18,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 18:13:18,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:13:18,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 18:13:18,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2020-10-14 18:13:18,825 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 22 states. [2020-10-14 18:13:20,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:13:20,341 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2020-10-14 18:13:20,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-14 18:13:20,342 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 59 [2020-10-14 18:13:20,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:13:20,343 INFO L225 Difference]: With dead ends: 98 [2020-10-14 18:13:20,343 INFO L226 Difference]: Without dead ends: 65 [2020-10-14 18:13:20,345 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=247, Invalid=1393, Unknown=0, NotChecked=0, Total=1640 [2020-10-14 18:13:20,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-14 18:13:20,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2020-10-14 18:13:20,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-14 18:13:20,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2020-10-14 18:13:20,358 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 59 [2020-10-14 18:13:20,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:13:20,359 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2020-10-14 18:13:20,359 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 18:13:20,359 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2020-10-14 18:13:20,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-14 18:13:20,360 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:13:20,360 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:13:20,360 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 18:13:20,361 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:13:20,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:13:20,361 INFO L82 PathProgramCache]: Analyzing trace with hash 854291501, now seen corresponding path program 13 times [2020-10-14 18:13:20,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:13:20,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1675913261] [2020-10-14 18:13:20,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:13:20,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:20,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:20,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:21,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:22,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:23,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:24,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:25,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:25,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:25,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-14 18:13:25,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 18:13:25,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 18:13:25,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:25,386 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:25,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-14 18:13:25,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:13:25,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-14 18:13:25,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:27,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:13:27,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:27,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:27,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:27,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:13:27,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:13:27,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:13:27,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:27,681 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:27,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:13:27,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:13:27,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:13:27,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:13:27,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:13:27,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:27,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:27,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:27,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:13:27,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:13:27,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:13:27,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:27,685 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:27,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:13:27,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:13:27,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:13:27,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:27,710 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:13:27,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1675913261] [2020-10-14 18:13:27,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:13:27,711 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-14 18:13:27,711 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939593687] [2020-10-14 18:13:27,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-14 18:13:27,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:13:27,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-14 18:13:27,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1106, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 18:13:27,713 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 36 states. [2020-10-14 18:13:30,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:13:30,556 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-10-14 18:13:30,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-14 18:13:30,557 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 61 [2020-10-14 18:13:30,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:13:30,557 INFO L225 Difference]: With dead ends: 73 [2020-10-14 18:13:30,557 INFO L226 Difference]: Without dead ends: 67 [2020-10-14 18:13:30,558 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=282, Invalid=2070, Unknown=0, NotChecked=0, Total=2352 [2020-10-14 18:13:30,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-14 18:13:30,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2020-10-14 18:13:30,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-14 18:13:30,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2020-10-14 18:13:30,565 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 61 [2020-10-14 18:13:30,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:13:30,565 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2020-10-14 18:13:30,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-14 18:13:30,566 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2020-10-14 18:13:30,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-14 18:13:30,566 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:13:30,567 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:13:30,567 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 18:13:30,567 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:13:30,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:13:30,567 INFO L82 PathProgramCache]: Analyzing trace with hash -910880323, now seen corresponding path program 14 times [2020-10-14 18:13:30,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:13:30,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1724188446] [2020-10-14 18:13:30,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:13:30,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:30,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:30,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:30,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:30,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:30,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:30,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:31,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:31,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:32,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:32,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:32,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:33,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:33,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:35,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:35,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-14 18:13:35,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-14 18:13:35,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-14 18:13:35,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:35,580 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:35,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 18:13:35,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:13:35,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-14 18:13:35,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:35,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:13:35,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:35,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:35,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:35,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:13:35,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:13:35,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:13:35,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:35,898 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:35,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:13:35,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:13:35,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:13:35,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:13:35,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:13:35,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:35,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:35,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:35,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:13:35,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:13:35,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:13:35,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:35,904 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:35,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:13:35,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:13:35,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:13:35,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:13:35,921 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 117 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:13:35,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1724188446] [2020-10-14 18:13:35,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:13:35,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 18:13:35,927 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98760951] [2020-10-14 18:13:35,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 18:13:35,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:13:35,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 18:13:35,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2020-10-14 18:13:35,933 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 22 states. [2020-10-14 18:13:36,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:13:36,486 INFO L93 Difference]: Finished difference Result 105 states and 107 transitions. [2020-10-14 18:13:36,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 18:13:36,487 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 64 [2020-10-14 18:13:36,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:13:36,488 INFO L225 Difference]: With dead ends: 105 [2020-10-14 18:13:36,489 INFO L226 Difference]: Without dead ends: 70 [2020-10-14 18:13:36,491 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=234, Invalid=758, Unknown=0, NotChecked=0, Total=992 [2020-10-14 18:13:36,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-14 18:13:36,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 67. [2020-10-14 18:13:36,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-14 18:13:36,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2020-10-14 18:13:36,506 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 64 [2020-10-14 18:13:36,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:13:36,507 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2020-10-14 18:13:36,507 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 18:13:36,507 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2020-10-14 18:13:36,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-14 18:13:36,509 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:13:36,509 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:13:36,509 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 18:13:36,509 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:13:36,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:13:36,510 INFO L82 PathProgramCache]: Analyzing trace with hash 2017699067, now seen corresponding path program 15 times [2020-10-14 18:13:36,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:13:36,511 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [441448729] [2020-10-14 18:13:36,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:13:36,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:36,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:37,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:38,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:40,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:41,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:41,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-14 18:13:41,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:13:41,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 18:13:41,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:41,545 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:41,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-14 18:13:41,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:13:41,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-14 18:13:41,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:42,934 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 42 [2020-10-14 18:13:43,141 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 50 [2020-10-14 18:13:43,370 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 50 [2020-10-14 18:13:43,899 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 56 [2020-10-14 18:13:44,093 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 51 [2020-10-14 18:13:44,959 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2020-10-14 18:13:45,574 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2020-10-14 18:13:46,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:13:46,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:46,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:46,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:46,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:13:46,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:13:46,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:13:46,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:46,273 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:46,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:13:46,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:13:46,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:13:46,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:46,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:13:46,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:46,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:46,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:46,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:13:46,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:13:46,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:13:46,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:46,276 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:46,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:13:46,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:13:46,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:13:46,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:46,325 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 25 proven. 173 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:13:46,325 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [441448729] [2020-10-14 18:13:46,325 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:13:46,325 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-14 18:13:46,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000835530] [2020-10-14 18:13:46,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-14 18:13:46,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:13:46,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-14 18:13:46,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1597, Unknown=0, NotChecked=0, Total=1806 [2020-10-14 18:13:46,327 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 43 states. [2020-10-14 18:13:47,057 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2020-10-14 18:13:48,056 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-10-14 18:13:48,622 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 50 [2020-10-14 18:13:49,178 WARN L193 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 107 [2020-10-14 18:13:49,787 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 59 [2020-10-14 18:13:49,966 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 60 [2020-10-14 18:13:50,201 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 62 [2020-10-14 18:13:50,404 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 64 [2020-10-14 18:13:50,621 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2020-10-14 18:13:50,811 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 62 [2020-10-14 18:13:51,221 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 67 [2020-10-14 18:13:51,546 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 56 [2020-10-14 18:13:51,865 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 58 [2020-10-14 18:13:52,174 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 56 [2020-10-14 18:13:52,461 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 58 [2020-10-14 18:13:52,728 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 55 [2020-10-14 18:13:52,947 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 57 [2020-10-14 18:13:53,281 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 56 [2020-10-14 18:13:53,551 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 58 [2020-10-14 18:13:53,941 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2020-10-14 18:13:54,374 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 69 [2020-10-14 18:13:54,807 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 71 [2020-10-14 18:13:55,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:13:55,228 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2020-10-14 18:13:55,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-14 18:13:55,230 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 66 [2020-10-14 18:13:55,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:13:55,231 INFO L225 Difference]: With dead ends: 76 [2020-10-14 18:13:55,231 INFO L226 Difference]: Without dead ends: 70 [2020-10-14 18:13:55,233 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1643 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=985, Invalid=5821, Unknown=0, NotChecked=0, Total=6806 [2020-10-14 18:13:55,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-14 18:13:55,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-10-14 18:13:55,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-14 18:13:55,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2020-10-14 18:13:55,240 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 66 [2020-10-14 18:13:55,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:13:55,241 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2020-10-14 18:13:55,241 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-14 18:13:55,241 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2020-10-14 18:13:55,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-14 18:13:55,242 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:13:55,242 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:13:55,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 18:13:55,242 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:13:55,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:13:55,242 INFO L82 PathProgramCache]: Analyzing trace with hash 2072806959, now seen corresponding path program 16 times [2020-10-14 18:13:55,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:13:55,243 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1148989018] [2020-10-14 18:13:55,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:13:55,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:55,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:55,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:55,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:56,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:56,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:56,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:56,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:56,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:57,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:57,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:58,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:59,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:59,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:00,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:14:00,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-14 18:14:00,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-14 18:14:00,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-14 18:14:00,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:14:00,267 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:14:00,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 18:14:00,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:14:00,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-14 18:14:00,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:14:00,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:14:00,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:14:00,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:00,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:14:00,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:14:00,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:14:00,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:14:00,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:14:00,533 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:14:00,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:14:00,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:14:00,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:14:00,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:14:00,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:14:00,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:14:00,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:00,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:14:00,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:14:00,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:14:00,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:14:00,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:14:00,537 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:14:00,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:14:00,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:14:00,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:14:00,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:14:00,544 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 145 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:14:00,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1148989018] [2020-10-14 18:14:00,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:14:00,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 18:14:00,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263882615] [2020-10-14 18:14:00,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 18:14:00,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:14:00,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 18:14:00,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2020-10-14 18:14:00,547 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand 24 states. [2020-10-14 18:14:01,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:14:01,217 INFO L93 Difference]: Finished difference Result 113 states and 115 transitions. [2020-10-14 18:14:01,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-14 18:14:01,218 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 69 [2020-10-14 18:14:01,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:14:01,219 INFO L225 Difference]: With dead ends: 113 [2020-10-14 18:14:01,219 INFO L226 Difference]: Without dead ends: 75 [2020-10-14 18:14:01,220 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=279, Invalid=911, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 18:14:01,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-14 18:14:01,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2020-10-14 18:14:01,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-14 18:14:01,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-10-14 18:14:01,232 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 69 [2020-10-14 18:14:01,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:14:01,233 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-10-14 18:14:01,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 18:14:01,233 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-10-14 18:14:01,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-14 18:14:01,234 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:14:01,234 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:14:01,234 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 18:14:01,235 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:14:01,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:14:01,235 INFO L82 PathProgramCache]: Analyzing trace with hash -135378511, now seen corresponding path program 17 times [2020-10-14 18:14:01,235 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:14:01,235 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [372469620] [2020-10-14 18:14:01,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:14:01,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:14:01,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:02,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:03,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:04,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:05,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:06,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:06,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:14:06,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-14 18:14:06,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 18:14:06,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5450 [2020-10-14 18:14:06,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:14:06,707 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:14:06,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-14 18:14:06,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:14:06,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-14 18:14:06,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:14:10,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:14:10,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:14:10,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:10,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:14:10,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:14:10,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:14:10,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:14:10,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:14:10,151 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:14:10,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:14:10,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:14:10,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:14:10,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:14:10,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:14:10,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:14:10,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:10,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:14:10,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:14:10,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:14:10,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:14:10,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:14:10,155 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:14:10,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:14:10,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:14:10,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:14:10,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:14:10,215 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:14:10,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [372469620] [2020-10-14 18:14:10,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:14:10,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-14 18:14:10,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002637024] [2020-10-14 18:14:10,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-14 18:14:10,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:14:10,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-14 18:14:10,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1673, Unknown=0, NotChecked=0, Total=1892 [2020-10-14 18:14:10,217 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 44 states. [2020-10-14 18:14:11,903 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 57 [2020-10-14 18:14:12,353 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 56 [2020-10-14 18:14:14,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:14:14,530 INFO L93 Difference]: Finished difference Result 83 states and 84 transitions. [2020-10-14 18:14:14,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-14 18:14:14,530 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 71 [2020-10-14 18:14:14,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:14:14,532 INFO L225 Difference]: With dead ends: 83 [2020-10-14 18:14:14,532 INFO L226 Difference]: Without dead ends: 77 [2020-10-14 18:14:14,534 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=407, Invalid=3133, Unknown=0, NotChecked=0, Total=3540 [2020-10-14 18:14:14,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-14 18:14:14,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2020-10-14 18:14:14,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-14 18:14:14,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2020-10-14 18:14:14,542 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 71 [2020-10-14 18:14:14,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:14:14,542 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2020-10-14 18:14:14,542 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-14 18:14:14,542 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2020-10-14 18:14:14,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-14 18:14:14,543 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:14:14,543 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:14:14,543 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 18:14:14,543 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:14:14,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:14:14,543 INFO L82 PathProgramCache]: Analyzing trace with hash 780279225, now seen corresponding path program 18 times [2020-10-14 18:14:14,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:14:14,544 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [390792529] [2020-10-14 18:14:14,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:14:14,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:14:14,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:14,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:15,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:15,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:15,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:15,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:15,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:16,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:17,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:17,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:19,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:19,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:14:19,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-14 18:14:19,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-14 18:14:19,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-14 18:14:19,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:14:19,583 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:14:19,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 18:14:19,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:14:19,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-14 18:14:19,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 18:14:20,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:14:20,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:14:20,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:20,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:14:20,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:14:20,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:14:20,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:14:20,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:14:20,094 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:14:20,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:14:20,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:14:20,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:14:20,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:14:20,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:14:20,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:14:20,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:20,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:14:20,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:14:20,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:14:20,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:14:20,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:14:20,101 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:14:20,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:14:20,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:14:20,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:14:20,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:14:20,115 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 157 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:14:20,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [390792529] [2020-10-14 18:14:20,116 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:14:20,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-14 18:14:20,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356737771] [2020-10-14 18:14:20,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-14 18:14:20,118 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:14:20,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-14 18:14:20,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=491, Unknown=0, NotChecked=0, Total=650 [2020-10-14 18:14:20,119 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 26 states. [2020-10-14 18:14:20,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:14:20,924 INFO L93 Difference]: Finished difference Result 121 states and 123 transitions. [2020-10-14 18:14:20,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 18:14:20,927 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 74 [2020-10-14 18:14:20,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:14:20,928 INFO L225 Difference]: With dead ends: 121 [2020-10-14 18:14:20,928 INFO L226 Difference]: Without dead ends: 80 [2020-10-14 18:14:20,931 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=328, Invalid=1078, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 18:14:20,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-14 18:14:20,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2020-10-14 18:14:20,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-14 18:14:20,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2020-10-14 18:14:20,942 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 74 [2020-10-14 18:14:20,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:14:20,942 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2020-10-14 18:14:20,942 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-14 18:14:20,942 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2020-10-14 18:14:20,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-14 18:14:20,943 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:14:20,943 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:14:20,943 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 18:14:20,943 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:14:20,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:14:20,944 INFO L82 PathProgramCache]: Analyzing trace with hash -443008137, now seen corresponding path program 19 times [2020-10-14 18:14:20,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:14:20,944 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [321717230] [2020-10-14 18:14:20,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:14:20,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:14:20,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:21,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:23,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:24,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:25,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:26,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:14:26,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-14 18:14:26,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 18:14:26,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5605 [2020-10-14 18:14:26,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:14:26,574 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:14:26,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-14 18:14:26,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:14:26,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-14 18:14:26,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:14:31,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:14:31,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:14:31,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:31,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:14:31,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:14:31,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:14:31,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:14:31,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:14:31,697 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:14:31,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:14:31,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:14:31,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:14:31,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:14:31,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:14:31,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:14:31,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:31,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:14:31,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:14:31,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:14:31,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:14:31,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:14:31,701 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:14:31,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:14:31,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:14:31,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:14:31,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:14:31,752 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:14:31,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [321717230] [2020-10-14 18:14:31,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:14:31,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-14 18:14:31,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056066452] [2020-10-14 18:14:31,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-14 18:14:31,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:14:31,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-14 18:14:31,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=2000, Unknown=0, NotChecked=0, Total=2256 [2020-10-14 18:14:31,755 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 48 states. [2020-10-14 18:14:33,083 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2020-10-14 18:14:33,662 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 59 [2020-10-14 18:14:33,865 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 58 [2020-10-14 18:14:34,168 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 68 [2020-10-14 18:14:34,479 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 60 [2020-10-14 18:14:34,780 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 58 [2020-10-14 18:14:35,096 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 67 [2020-10-14 18:14:35,409 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 59 [2020-10-14 18:14:35,726 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 66 [2020-10-14 18:14:36,031 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 65 [2020-10-14 18:14:36,369 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2020-10-14 18:14:36,727 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 60 [2020-10-14 18:14:37,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:14:37,571 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2020-10-14 18:14:37,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-14 18:14:37,575 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 76 [2020-10-14 18:14:37,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:14:37,576 INFO L225 Difference]: With dead ends: 88 [2020-10-14 18:14:37,576 INFO L226 Difference]: Without dead ends: 82 [2020-10-14 18:14:37,578 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=470, Invalid=3690, Unknown=0, NotChecked=0, Total=4160 [2020-10-14 18:14:37,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-14 18:14:37,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2020-10-14 18:14:37,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-14 18:14:37,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2020-10-14 18:14:37,589 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 76 [2020-10-14 18:14:37,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:14:37,589 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2020-10-14 18:14:37,589 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-14 18:14:37,589 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2020-10-14 18:14:37,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-14 18:14:37,590 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:14:37,590 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:14:37,591 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 18:14:37,591 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:14:37,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:14:37,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1646300723, now seen corresponding path program 20 times [2020-10-14 18:14:37,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:14:37,592 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [205602998] [2020-10-14 18:14:37,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:14:37,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:14:37,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:37,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:38,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:38,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:38,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:38,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:38,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:39,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:39,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:40,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:40,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:40,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:42,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:14:42,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-14 18:14:42,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-14 18:14:42,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 18:14:42,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:14:42,608 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:14:42,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 18:14:42,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:14:42,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-14 18:14:42,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:14:43,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:14:43,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:14:43,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:43,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:14:43,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:14:43,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:14:43,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:14:43,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:14:43,042 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:14:43,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:14:43,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:14:43,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:14:43,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:14:43,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:14:43,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:14:43,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:43,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:14:43,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:14:43,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:14:43,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:14:43,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:14:43,046 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:14:43,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:14:43,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:14:43,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:14:43,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:14:43,052 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 210 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:14:43,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [205602998] [2020-10-14 18:14:43,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:14:43,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-14 18:14:43,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142512571] [2020-10-14 18:14:43,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-14 18:14:43,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:14:43,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-14 18:14:43,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2020-10-14 18:14:43,054 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand 28 states. [2020-10-14 18:14:43,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:14:43,799 INFO L93 Difference]: Finished difference Result 129 states and 131 transitions. [2020-10-14 18:14:43,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 18:14:43,800 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 79 [2020-10-14 18:14:43,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:14:43,801 INFO L225 Difference]: With dead ends: 129 [2020-10-14 18:14:43,802 INFO L226 Difference]: Without dead ends: 85 [2020-10-14 18:14:43,803 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=381, Invalid=1259, Unknown=0, NotChecked=0, Total=1640 [2020-10-14 18:14:43,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-14 18:14:43,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2020-10-14 18:14:43,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-14 18:14:43,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2020-10-14 18:14:43,817 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 79 [2020-10-14 18:14:43,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:14:43,817 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2020-10-14 18:14:43,817 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-14 18:14:43,817 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2020-10-14 18:14:43,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-14 18:14:43,818 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:14:43,818 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:14:43,818 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 18:14:43,818 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:14:43,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:14:43,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1770870581, now seen corresponding path program 21 times [2020-10-14 18:14:43,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:14:43,819 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [429550341] [2020-10-14 18:14:43,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:14:43,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:14:43,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:45,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:46,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:48,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:49,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:14:49,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-14 18:14:49,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:14:49,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5237 [2020-10-14 18:14:49,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:14:49,080 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:14:49,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-14 18:14:49,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:14:49,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-14 18:14:49,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:14:51,869 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 61 [2020-10-14 18:14:55,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:14:55,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:14:55,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:55,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:14:55,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:14:55,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:14:55,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:14:55,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:14:55,344 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:14:55,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:14:55,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:14:55,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:14:55,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:14:55,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:14:55,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:14:55,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:55,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:14:55,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:14:55,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:14:55,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:14:55,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:14:55,348 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:14:55,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:14:55,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:14:55,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:14:55,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:14:55,410 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:14:55,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [429550341] [2020-10-14 18:14:55,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:14:55,411 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-14 18:14:55,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099967915] [2020-10-14 18:14:55,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-14 18:14:55,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:14:55,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-14 18:14:55,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=2429, Unknown=0, NotChecked=0, Total=2652 [2020-10-14 18:14:55,413 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand 52 states. [2020-10-14 18:14:57,159 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 61 [2020-10-14 18:14:57,988 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 63 [2020-10-14 18:14:58,320 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 67 [2020-10-14 18:14:58,732 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 73 [2020-10-14 18:14:59,109 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 64 [2020-10-14 18:14:59,515 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 62 [2020-10-14 18:14:59,915 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 67 [2020-10-14 18:15:00,279 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 63 [2020-10-14 18:15:00,660 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 71 [2020-10-14 18:15:01,052 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 70 [2020-10-14 18:15:01,445 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 71 [2020-10-14 18:15:01,813 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 69 [2020-10-14 18:15:02,220 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 65 [2020-10-14 18:15:03,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:15:03,140 INFO L93 Difference]: Finished difference Result 93 states and 94 transitions. [2020-10-14 18:15:03,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-14 18:15:03,141 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 81 [2020-10-14 18:15:03,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:15:03,142 INFO L225 Difference]: With dead ends: 93 [2020-10-14 18:15:03,142 INFO L226 Difference]: Without dead ends: 87 [2020-10-14 18:15:03,144 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 892 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=467, Invalid=4363, Unknown=0, NotChecked=0, Total=4830 [2020-10-14 18:15:03,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-14 18:15:03,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 85. [2020-10-14 18:15:03,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-14 18:15:03,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2020-10-14 18:15:03,153 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 81 [2020-10-14 18:15:03,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:15:03,154 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2020-10-14 18:15:03,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-14 18:15:03,154 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2020-10-14 18:15:03,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-14 18:15:03,154 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:15:03,154 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:15:03,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-14 18:15:03,155 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:15:03,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:15:03,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1789391285, now seen corresponding path program 22 times [2020-10-14 18:15:03,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:15:03,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [397329588] [2020-10-14 18:15:03,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:15:03,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:15:03,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:15:03,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:15:03,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:15:03,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:15:03,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:15:03,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:15:04,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:15:04,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:15:06,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:15:07,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:15:08,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:15:08,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:15:08,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-14 18:15:08,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-14 18:15:08,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-14 18:15:08,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:15:08,184 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:15:08,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-14 18:15:08,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:15:08,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-14 18:15:08,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:15:08,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:15:08,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:15:08,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:15:08,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:15:08,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:15:08,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:15:08,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:15:08,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:15:08,746 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:15:08,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:15:08,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:15:08,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:15:08,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:15:08,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:15:08,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:15:08,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:15:08,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:15:08,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:15:08,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:15:08,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:15:08,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:15:08,757 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:15:08,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:15:08,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:15:08,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:15:08,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:15:08,778 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 224 proven. 167 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:15:08,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [397329588] [2020-10-14 18:15:08,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:15:08,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-14 18:15:08,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098933450] [2020-10-14 18:15:08,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-14 18:15:08,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:15:08,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-14 18:15:08,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=657, Unknown=0, NotChecked=0, Total=870 [2020-10-14 18:15:08,783 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 30 states. [2020-10-14 18:15:10,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:15:10,108 INFO L93 Difference]: Finished difference Result 137 states and 139 transitions. [2020-10-14 18:15:10,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-14 18:15:10,109 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 84 [2020-10-14 18:15:10,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:15:10,110 INFO L225 Difference]: With dead ends: 137 [2020-10-14 18:15:10,110 INFO L226 Difference]: Without dead ends: 90 [2020-10-14 18:15:10,111 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=438, Invalid=1454, Unknown=0, NotChecked=0, Total=1892 [2020-10-14 18:15:10,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-14 18:15:10,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2020-10-14 18:15:10,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-14 18:15:10,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2020-10-14 18:15:10,125 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 84 [2020-10-14 18:15:10,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:15:10,125 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2020-10-14 18:15:10,125 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-14 18:15:10,125 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2020-10-14 18:15:10,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-14 18:15:10,126 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:15:10,126 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:15:10,127 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-14 18:15:10,127 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:15:10,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:15:10,127 INFO L82 PathProgramCache]: Analyzing trace with hash 674920947, now seen corresponding path program 23 times [2020-10-14 18:15:10,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:15:10,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [264978100] [2020-10-14 18:15:10,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:15:10,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:15:10,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:15:11,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:15:15,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:15:15,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-14 18:15:15,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:15:15,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 18:15:15,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:15:15,160 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:15:15,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-14 18:15:15,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:15:15,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-14 18:15:15,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:15:17,321 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 65 [2020-10-14 18:15:18,274 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2020-10-14 18:15:21,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:15:21,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:15:21,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:15:21,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:15:21,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:15:21,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:15:21,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:15:21,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:15:21,352 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:15:21,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:15:21,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:15:21,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:15:21,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:15:21,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:15:21,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:15:21,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:15:21,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:15:21,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:15:21,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:15:21,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:15:21,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:15:21,357 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:15:21,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:15:21,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:15:21,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:15:21,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:15:21,460 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:15:21,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [264978100] [2020-10-14 18:15:21,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:15:21,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-14 18:15:21,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670884049] [2020-10-14 18:15:21,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-14 18:15:21,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:15:21,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-14 18:15:21,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=2761, Unknown=0, NotChecked=0, Total=3080 [2020-10-14 18:15:21,463 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 56 states. [2020-10-14 18:15:24,428 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 63 [2020-10-14 18:15:25,269 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 64 [2020-10-14 18:15:25,605 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 71 [2020-10-14 18:15:25,962 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 64 [2020-10-14 18:15:26,358 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 65 [2020-10-14 18:15:26,785 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 66 [2020-10-14 18:15:27,166 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 62 [2020-10-14 18:15:27,584 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 63 [2020-10-14 18:15:28,001 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 67 [2020-10-14 18:15:28,431 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 65 [2020-10-14 18:15:28,838 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 68 [2020-10-14 18:15:29,274 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2020-10-14 18:15:29,713 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2020-10-14 18:15:30,210 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 67 [2020-10-14 18:15:31,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:15:31,326 INFO L93 Difference]: Finished difference Result 98 states and 99 transitions. [2020-10-14 18:15:31,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-14 18:15:31,328 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 86 [2020-10-14 18:15:31,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:15:31,328 INFO L225 Difference]: With dead ends: 98 [2020-10-14 18:15:31,329 INFO L226 Difference]: Without dead ends: 92 [2020-10-14 18:15:31,330 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=594, Invalid=4956, Unknown=0, NotChecked=0, Total=5550 [2020-10-14 18:15:31,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-14 18:15:31,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 90. [2020-10-14 18:15:31,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-14 18:15:31,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2020-10-14 18:15:31,339 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 86 [2020-10-14 18:15:31,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:15:31,340 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2020-10-14 18:15:31,340 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-14 18:15:31,340 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2020-10-14 18:15:31,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-14 18:15:31,341 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:15:31,341 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:15:31,341 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-14 18:15:31,341 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:15:31,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:15:31,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1599738313, now seen corresponding path program 24 times [2020-10-14 18:15:31,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:15:31,342 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [847707050] [2020-10-14 18:15:31,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:15:31,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:15:31,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:15:33,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:15:35,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:15:35,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:15:36,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:15:36,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-14 18:15:36,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:15:36,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 18:15:36,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:15:36,361 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:15:36,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-14 18:15:36,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:15:36,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-14 18:15:36,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:15:37,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:15:37,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:15:37,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:15:37,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:15:37,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:15:37,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:15:37,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:15:37,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:15:37,056 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:15:37,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:15:37,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:15:37,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:15:37,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:15:37,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:15:37,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:15:37,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:15:37,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:15:37,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:15:37,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:15:37,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:15:37,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:15:37,060 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:15:37,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:15:37,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:15:37,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:15:37,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:15:37,069 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 287 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:15:37,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [847707050] [2020-10-14 18:15:37,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:15:37,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-14 18:15:37,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787779493] [2020-10-14 18:15:37,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-14 18:15:37,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:15:37,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-14 18:15:37,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=749, Unknown=0, NotChecked=0, Total=992 [2020-10-14 18:15:37,071 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand 32 states. [2020-10-14 18:15:38,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:15:38,205 INFO L93 Difference]: Finished difference Result 145 states and 147 transitions. [2020-10-14 18:15:38,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-14 18:15:38,207 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 89 [2020-10-14 18:15:38,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:15:38,208 INFO L225 Difference]: With dead ends: 145 [2020-10-14 18:15:38,208 INFO L226 Difference]: Without dead ends: 95 [2020-10-14 18:15:38,209 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=499, Invalid=1663, Unknown=0, NotChecked=0, Total=2162 [2020-10-14 18:15:38,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-14 18:15:38,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2020-10-14 18:15:38,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-14 18:15:38,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2020-10-14 18:15:38,220 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 89 [2020-10-14 18:15:38,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:15:38,221 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2020-10-14 18:15:38,221 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-14 18:15:38,221 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2020-10-14 18:15:38,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-14 18:15:38,222 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:15:38,222 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:15:38,223 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-14 18:15:38,223 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:15:38,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:15:38,223 INFO L82 PathProgramCache]: Analyzing trace with hash 188013753, now seen corresponding path program 25 times [2020-10-14 18:15:38,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:15:38,224 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [960233504] [2020-10-14 18:15:38,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:15:38,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:15:38,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:15:41,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:15:43,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:15:43,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-14 18:15:43,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:15:43,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-14 18:15:43,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:15:43,303 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:15:43,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 58 [2020-10-14 18:15:43,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:15:43,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-14 18:15:43,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:15:46,161 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 69 [2020-10-14 18:15:46,927 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2020-10-14 18:15:47,386 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-10-14 18:15:47,852 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 58 [2020-10-14 18:15:48,273 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2020-10-14 18:15:48,853 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 48 [2020-10-14 18:15:49,285 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-10-14 18:15:51,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:15:51,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:15:51,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:15:51,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:15:51,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:15:51,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:15:51,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:15:51,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:15:51,874 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:15:51,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:15:51,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:15:51,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:15:51,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:15:51,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:15:51,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:15:51,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:15:51,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:15:51,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:15:51,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:15:51,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:15:51,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:15:51,879 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:15:51,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:15:51,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:15:51,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:15:51,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:15:51,966 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 483 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:15:51,966 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [960233504] [2020-10-14 18:15:51,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:15:51,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-10-14 18:15:51,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730704439] [2020-10-14 18:15:51,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-10-14 18:15:51,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:15:51,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-10-14 18:15:51,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=366, Invalid=3174, Unknown=0, NotChecked=0, Total=3540 [2020-10-14 18:15:51,968 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand 60 states.