/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_copy6_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 23:30:36,740 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 23:30:36,743 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 23:30:36,766 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 23:30:36,766 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 23:30:36,767 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 23:30:36,768 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 23:30:36,770 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 23:30:36,772 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 23:30:36,773 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 23:30:36,774 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 23:30:36,775 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 23:30:36,775 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 23:30:36,776 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 23:30:36,777 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 23:30:36,783 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 23:30:36,784 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 23:30:36,785 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 23:30:36,789 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 23:30:36,792 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 23:30:36,796 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 23:30:36,797 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 23:30:36,798 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 23:30:36,799 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 23:30:36,806 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 23:30:36,806 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 23:30:36,807 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 23:30:36,808 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 23:30:36,809 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 23:30:36,809 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 23:30:36,810 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 23:30:36,813 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 23:30:36,813 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 23:30:36,815 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 23:30:36,816 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 23:30:36,816 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 23:30:36,824 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 23:30:36,825 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 23:30:36,825 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 23:30:36,826 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 23:30:36,827 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 23:30:36,830 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 23:30:36,869 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 23:30:36,869 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 23:30:36,871 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 23:30:36,872 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 23:30:36,872 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 23:30:36,872 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 23:30:36,872 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 23:30:36,872 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 23:30:36,873 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 23:30:36,873 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 23:30:36,874 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 23:30:36,874 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 23:30:36,874 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 23:30:36,875 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 23:30:36,875 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 23:30:36,875 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 23:30:36,875 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 23:30:36,875 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 23:30:36,876 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 23:30:36,876 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 23:30:36,876 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 23:30:36,876 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 23:30:36,876 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 23:30:36,877 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 23:30:36,877 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 23:30:36,877 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 23:30:36,877 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 23:30:36,877 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 23:30:36,878 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 23:30:36,878 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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-13 23:30:37,212 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 23:30:37,225 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 23:30:37,228 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 23:30:37,230 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 23:30:37,230 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 23:30:37,231 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy6_ground-1.i [2020-10-13 23:30:37,305 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1a5ea2c16/292ccf5c5db4435bbf2762c51f498f63/FLAGb5021a932 [2020-10-13 23:30:37,802 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 23:30:37,805 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_copy6_ground-1.i [2020-10-13 23:30:37,812 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1a5ea2c16/292ccf5c5db4435bbf2762c51f498f63/FLAGb5021a932 [2020-10-13 23:30:38,157 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1a5ea2c16/292ccf5c5db4435bbf2762c51f498f63 [2020-10-13 23:30:38,168 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 23:30:38,170 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 23:30:38,172 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 23:30:38,172 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 23:30:38,175 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 23:30:38,176 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:30:38" (1/1) ... [2020-10-13 23:30:38,179 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17135c3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:30:38, skipping insertion in model container [2020-10-13 23:30:38,179 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:30:38" (1/1) ... [2020-10-13 23:30:38,187 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 23:30:38,205 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 23:30:38,408 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:30:38,411 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 23:30:38,435 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:30:38,455 INFO L208 MainTranslator]: Completed translation [2020-10-13 23:30:38,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:30:38 WrapperNode [2020-10-13 23:30:38,456 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 23:30:38,457 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 23:30:38,457 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 23:30:38,457 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 23:30:38,560 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:30:38" (1/1) ... [2020-10-13 23:30:38,562 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:30:38" (1/1) ... [2020-10-13 23:30:38,574 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:30:38" (1/1) ... [2020-10-13 23:30:38,575 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:30:38" (1/1) ... [2020-10-13 23:30:38,585 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:30:38" (1/1) ... [2020-10-13 23:30:38,593 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:30:38" (1/1) ... [2020-10-13 23:30:38,595 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:30:38" (1/1) ... [2020-10-13 23:30:38,600 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 23:30:38,601 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 23:30:38,601 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 23:30:38,601 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 23:30:38,602 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:30:38" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 23:30:38,652 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 23:30:38,652 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 23:30:38,652 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 23:30:38,652 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 23:30:38,652 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 23:30:38,653 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 23:30:38,653 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 23:30:38,653 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 23:30:38,653 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 23:30:38,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 23:30:38,653 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 23:30:38,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 23:30:38,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 23:30:38,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 23:30:39,002 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 23:30:39,002 INFO L295 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-13 23:30:39,007 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:30:39 BoogieIcfgContainer [2020-10-13 23:30:39,008 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 23:30:39,009 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 23:30:39,009 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 23:30:39,012 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 23:30:39,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:30:38" (1/3) ... [2020-10-13 23:30:39,013 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b6a8147 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:30:39, skipping insertion in model container [2020-10-13 23:30:39,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:30:38" (2/3) ... [2020-10-13 23:30:39,014 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b6a8147 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:30:39, skipping insertion in model container [2020-10-13 23:30:39,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:30:39" (3/3) ... [2020-10-13 23:30:39,015 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy6_ground-1.i [2020-10-13 23:30:39,027 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 23:30:39,034 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 23:30:39,051 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 23:30:39,076 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 23:30:39,076 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 23:30:39,076 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 23:30:39,076 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 23:30:39,077 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 23:30:39,077 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 23:30:39,077 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 23:30:39,077 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 23:30:39,099 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2020-10-13 23:30:39,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-13 23:30:39,112 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:30:39,112 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] [2020-10-13 23:30:39,113 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:30:39,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:30:39,119 INFO L82 PathProgramCache]: Analyzing trace with hash 772526198, now seen corresponding path program 1 times [2020-10-13 23:30:39,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:30:39,129 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1760023722] [2020-10-13 23:30:39,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:30:39,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:39,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:39,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:39,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:39,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:39,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:39,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:39,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:40,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:40,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 23:30:40,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:30:40,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1521 [2020-10-13 23:30:40,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:40,781 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:40,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:40,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:30:40,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:40,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-13 23:30:40,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:30:40,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:40,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:40,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:40,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:30:40,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:30:40,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 23:30:40,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:40,884 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:40,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:40,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:30:40,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:40,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 23:30:40,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:30:40,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1760023722] [2020-10-13 23:30:40,907 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:30:40,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 23:30:40,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760705987] [2020-10-13 23:30:40,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 23:30:40,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:30:40,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 23:30:40,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:30:40,947 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 3 states. [2020-10-13 23:30:41,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:30:41,118 INFO L93 Difference]: Finished difference Result 76 states and 107 transitions. [2020-10-13 23:30:41,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 23:30:41,120 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-10-13 23:30:41,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:30:41,128 INFO L225 Difference]: With dead ends: 76 [2020-10-13 23:30:41,128 INFO L226 Difference]: Without dead ends: 37 [2020-10-13 23:30:41,132 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:30:41,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-13 23:30:41,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-13 23:30:41,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-13 23:30:41,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2020-10-13 23:30:41,178 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 25 [2020-10-13 23:30:41,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:30:41,179 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2020-10-13 23:30:41,179 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 23:30:41,179 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2020-10-13 23:30:41,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-13 23:30:41,180 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:30:41,181 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] [2020-10-13 23:30:41,181 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 23:30:41,181 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:30:41,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:30:41,182 INFO L82 PathProgramCache]: Analyzing trace with hash 514335338, now seen corresponding path program 1 times [2020-10-13 23:30:41,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:30:41,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [876967670] [2020-10-13 23:30:41,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:30:41,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:41,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:41,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:41,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:41,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:41,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:41,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:41,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:43,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:43,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 23:30:43,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:30:43,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2599 [2020-10-13 23:30:43,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:43,795 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:43,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:30:43,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-13 23:30:43,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:30:43,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:30:43,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:30:43,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:43,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:43,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:43,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:30:43,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:30:43,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:30:43,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:43,829 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:43,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:43,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:30:43,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:43,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:30:43,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:30:43,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [876967670] [2020-10-13 23:30:43,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:30:43,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 23:30:43,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093579175] [2020-10-13 23:30:43,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 23:30:43,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:30:43,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 23:30:43,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:30:43,837 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand 4 states. [2020-10-13 23:30:43,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:30:43,973 INFO L93 Difference]: Finished difference Result 75 states and 93 transitions. [2020-10-13 23:30:43,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 23:30:43,974 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-13 23:30:43,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:30:43,975 INFO L225 Difference]: With dead ends: 75 [2020-10-13 23:30:43,976 INFO L226 Difference]: Without dead ends: 49 [2020-10-13 23:30:43,977 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:30:43,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-13 23:30:43,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2020-10-13 23:30:43,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-13 23:30:43,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2020-10-13 23:30:43,989 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 25 [2020-10-13 23:30:43,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:30:43,990 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2020-10-13 23:30:43,990 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 23:30:43,990 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2020-10-13 23:30:43,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 23:30:43,994 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:30:43,994 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:30:43,994 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 23:30:43,995 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:30:43,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:30:43,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1854451550, now seen corresponding path program 1 times [2020-10-13 23:30:43,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:30:43,996 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1398446817] [2020-10-13 23:30:43,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:30:44,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:44,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:44,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:44,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:44,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:44,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:44,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:45,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:49,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:49,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 23:30:49,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:30:49,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 23:30:49,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:49,028 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:49,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:30:49,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:30:49,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:30:49,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 23:30:49,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:30:49,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:49,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:49,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:49,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:30:49,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:30:49,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:30:49,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:49,065 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:49,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:49,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:30:49,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:49,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:30:49,070 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 23:30:49,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1398446817] [2020-10-13 23:30:49,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:30:49,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 23:30:49,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185968986] [2020-10-13 23:30:49,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 23:30:49,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:30:49,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 23:30:49,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:30:49,073 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand 4 states. [2020-10-13 23:30:49,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:30:49,207 INFO L93 Difference]: Finished difference Result 80 states and 94 transitions. [2020-10-13 23:30:49,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 23:30:49,208 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 37 [2020-10-13 23:30:49,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:30:49,209 INFO L225 Difference]: With dead ends: 80 [2020-10-13 23:30:49,209 INFO L226 Difference]: Without dead ends: 45 [2020-10-13 23:30:49,210 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:30:49,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-13 23:30:49,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-10-13 23:30:49,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-13 23:30:49,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2020-10-13 23:30:49,227 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 37 [2020-10-13 23:30:49,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:30:49,227 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2020-10-13 23:30:49,227 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 23:30:49,227 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2020-10-13 23:30:49,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 23:30:49,231 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:30:49,231 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:30:49,231 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 23:30:49,231 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:30:49,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:30:49,232 INFO L82 PathProgramCache]: Analyzing trace with hash 342802812, now seen corresponding path program 1 times [2020-10-13 23:30:49,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:30:49,233 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1788758954] [2020-10-13 23:30:49,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:30:49,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:49,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:49,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:49,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:49,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:49,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:49,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:49,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:54,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:54,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 23:30:54,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:30:54,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:30:54,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:54,258 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:54,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 23:30:54,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 23:30:54,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 23:30:54,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:30:54,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:30:54,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:54,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:54,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:54,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:30:54,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:30:54,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:30:54,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:54,304 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:54,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:54,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:30:54,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:54,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 23:30:54,315 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 23:30:54,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1788758954] [2020-10-13 23:30:54,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:30:54,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 23:30:54,317 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164102672] [2020-10-13 23:30:54,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 23:30:54,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:30:54,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 23:30:54,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:30:54,322 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand 5 states. [2020-10-13 23:30:54,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:30:54,580 INFO L93 Difference]: Finished difference Result 93 states and 111 transitions. [2020-10-13 23:30:54,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 23:30:54,581 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 39 [2020-10-13 23:30:54,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:30:54,583 INFO L225 Difference]: With dead ends: 93 [2020-10-13 23:30:54,583 INFO L226 Difference]: Without dead ends: 62 [2020-10-13 23:30:54,584 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:30:54,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-13 23:30:54,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2020-10-13 23:30:54,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-13 23:30:54,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2020-10-13 23:30:54,598 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 39 [2020-10-13 23:30:54,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:30:54,599 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2020-10-13 23:30:54,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 23:30:54,599 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2020-10-13 23:30:54,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 23:30:54,602 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:30:54,603 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:30:54,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 23:30:54,603 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:30:54,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:30:54,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1643113616, now seen corresponding path program 2 times [2020-10-13 23:30:54,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:30:54,605 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [408548463] [2020-10-13 23:30:54,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:30:54,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:54,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:54,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:54,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:54,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:54,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:54,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:59,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:59,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 23:30:59,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:30:59,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 23:30:59,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:59,630 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:59,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:30:59,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-13 23:30:59,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:30:59,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:30:59,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:30:59,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:59,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:59,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:59,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:30:59,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:30:59,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:30:59,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:59,684 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:59,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:59,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:30:59,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:59,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:30:59,689 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-13 23:30:59,689 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [408548463] [2020-10-13 23:30:59,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:30:59,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 23:30:59,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624171665] [2020-10-13 23:30:59,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 23:30:59,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:30:59,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 23:30:59,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:30:59,693 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand 6 states. [2020-10-13 23:30:59,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:30:59,892 INFO L93 Difference]: Finished difference Result 115 states and 133 transitions. [2020-10-13 23:30:59,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 23:30:59,893 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 51 [2020-10-13 23:30:59,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:30:59,895 INFO L225 Difference]: With dead ends: 115 [2020-10-13 23:30:59,895 INFO L226 Difference]: Without dead ends: 74 [2020-10-13 23:30:59,896 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:30:59,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-13 23:30:59,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 68. [2020-10-13 23:30:59,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-13 23:30:59,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 75 transitions. [2020-10-13 23:30:59,905 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 75 transitions. Word has length 51 [2020-10-13 23:30:59,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:30:59,905 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 75 transitions. [2020-10-13 23:30:59,905 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 23:30:59,905 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 75 transitions. [2020-10-13 23:30:59,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-13 23:30:59,906 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:30:59,907 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1] [2020-10-13 23:30:59,907 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 23:30:59,907 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:30:59,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:30:59,907 INFO L82 PathProgramCache]: Analyzing trace with hash 2026301284, now seen corresponding path program 3 times [2020-10-13 23:30:59,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:30:59,908 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1882271376] [2020-10-13 23:30:59,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:30:59,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:59,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:59,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:59,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:59,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:00,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:03,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:04,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:04,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-13 23:31:04,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:31:04,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 23:31:04,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:04,935 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:04,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 23:31:04,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:31:04,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 23:31:04,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 23:31:04,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:04,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:04,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:04,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:04,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:04,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:04,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:31:04,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:04,979 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:04,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:04,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:04,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:04,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:31:04,986 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2020-10-13 23:31:04,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1882271376] [2020-10-13 23:31:04,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:04,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 23:31:04,988 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481901826] [2020-10-13 23:31:04,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 23:31:04,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:04,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 23:31:04,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:31:04,989 INFO L87 Difference]: Start difference. First operand 68 states and 75 transitions. Second operand 5 states. [2020-10-13 23:31:05,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:05,085 INFO L93 Difference]: Finished difference Result 130 states and 144 transitions. [2020-10-13 23:31:05,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 23:31:05,086 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2020-10-13 23:31:05,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:05,087 INFO L225 Difference]: With dead ends: 130 [2020-10-13 23:31:05,087 INFO L226 Difference]: Without dead ends: 71 [2020-10-13 23:31:05,088 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:31:05,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-13 23:31:05,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2020-10-13 23:31:05,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-13 23:31:05,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 77 transitions. [2020-10-13 23:31:05,101 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 77 transitions. Word has length 63 [2020-10-13 23:31:05,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:05,101 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 77 transitions. [2020-10-13 23:31:05,101 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 23:31:05,101 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 77 transitions. [2020-10-13 23:31:05,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 23:31:05,103 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:05,104 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:31:05,104 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 23:31:05,105 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:05,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:05,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1440378882, now seen corresponding path program 4 times [2020-10-13 23:31:05,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:05,105 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2124863508] [2020-10-13 23:31:05,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:05,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:05,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:05,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:05,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:05,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:05,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:08,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:10,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:10,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 23:31:10,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:31:10,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-13 23:31:10,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:10,153 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:10,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:31:10,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 23:31:10,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 23:31:10,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:31:10,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:10,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:10,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:10,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:10,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:10,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:10,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:31:10,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:10,245 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:10,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:10,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:10,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:10,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:31:10,252 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-13 23:31:10,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2124863508] [2020-10-13 23:31:10,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:10,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 23:31:10,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152979132] [2020-10-13 23:31:10,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 23:31:10,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:10,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 23:31:10,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:31:10,255 INFO L87 Difference]: Start difference. First operand 70 states and 77 transitions. Second operand 7 states. [2020-10-13 23:31:10,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:10,570 INFO L93 Difference]: Finished difference Result 139 states and 157 transitions. [2020-10-13 23:31:10,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 23:31:10,571 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 65 [2020-10-13 23:31:10,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:10,572 INFO L225 Difference]: With dead ends: 139 [2020-10-13 23:31:10,572 INFO L226 Difference]: Without dead ends: 88 [2020-10-13 23:31:10,574 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:31:10,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-13 23:31:10,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 82. [2020-10-13 23:31:10,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-13 23:31:10,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 89 transitions. [2020-10-13 23:31:10,592 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 89 transitions. Word has length 65 [2020-10-13 23:31:10,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:10,594 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 89 transitions. [2020-10-13 23:31:10,595 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 23:31:10,595 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 89 transitions. [2020-10-13 23:31:10,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-13 23:31:10,596 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:10,596 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:31:10,596 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 23:31:10,597 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:10,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:10,600 INFO L82 PathProgramCache]: Analyzing trace with hash -529938186, now seen corresponding path program 5 times [2020-10-13 23:31:10,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:10,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [478203649] [2020-10-13 23:31:10,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:10,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:10,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:10,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:10,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:10,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:10,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:15,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:15,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-13 23:31:15,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:31:15,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-13 23:31:15,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:15,641 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:15,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:31:15,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:31:15,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:31:15,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:31:15,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:15,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:15,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:15,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:15,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:15,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:15,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:31:15,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:15,705 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:15,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:15,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:15,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:15,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:31:15,712 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2020-10-13 23:31:15,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [478203649] [2020-10-13 23:31:15,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:15,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 23:31:15,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74106534] [2020-10-13 23:31:15,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 23:31:15,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:15,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 23:31:15,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:31:15,715 INFO L87 Difference]: Start difference. First operand 82 states and 89 transitions. Second operand 6 states. [2020-10-13 23:31:15,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:15,814 INFO L93 Difference]: Finished difference Result 156 states and 170 transitions. [2020-10-13 23:31:15,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 23:31:15,815 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 77 [2020-10-13 23:31:15,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:15,816 INFO L225 Difference]: With dead ends: 156 [2020-10-13 23:31:15,816 INFO L226 Difference]: Without dead ends: 85 [2020-10-13 23:31:15,817 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:31:15,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-13 23:31:15,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2020-10-13 23:31:15,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-13 23:31:15,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 91 transitions. [2020-10-13 23:31:15,824 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 91 transitions. Word has length 77 [2020-10-13 23:31:15,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:15,824 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 91 transitions. [2020-10-13 23:31:15,824 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 23:31:15,825 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 91 transitions. [2020-10-13 23:31:15,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-13 23:31:15,826 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:15,826 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2020-10-13 23:31:15,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 23:31:15,826 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:15,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:15,827 INFO L82 PathProgramCache]: Analyzing trace with hash -434445036, now seen corresponding path program 6 times [2020-10-13 23:31:15,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:15,827 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1524627913] [2020-10-13 23:31:15,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:15,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:15,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:15,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:15,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:15,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:15,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:20,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:20,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-13 23:31:20,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:31:20,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 23:31:20,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:20,844 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:20,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 23:31:20,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-13 23:31:20,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 23:31:20,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:31:20,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:20,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:20,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:20,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:20,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:20,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:20,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:31:20,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:20,902 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:20,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:20,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:20,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:20,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:31:20,909 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2020-10-13 23:31:20,914 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1524627913] [2020-10-13 23:31:20,915 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:20,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 23:31:20,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806729751] [2020-10-13 23:31:20,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 23:31:20,916 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:20,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 23:31:20,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:31:20,917 INFO L87 Difference]: Start difference. First operand 84 states and 91 transitions. Second operand 8 states. [2020-10-13 23:31:21,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:21,204 INFO L93 Difference]: Finished difference Result 163 states and 181 transitions. [2020-10-13 23:31:21,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 23:31:21,205 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 79 [2020-10-13 23:31:21,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:21,206 INFO L225 Difference]: With dead ends: 163 [2020-10-13 23:31:21,206 INFO L226 Difference]: Without dead ends: 102 [2020-10-13 23:31:21,207 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:31:21,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-13 23:31:21,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 96. [2020-10-13 23:31:21,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-13 23:31:21,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 103 transitions. [2020-10-13 23:31:21,222 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 103 transitions. Word has length 79 [2020-10-13 23:31:21,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:21,222 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 103 transitions. [2020-10-13 23:31:21,222 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 23:31:21,222 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 103 transitions. [2020-10-13 23:31:21,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-13 23:31:21,223 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:21,224 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 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] [2020-10-13 23:31:21,224 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 23:31:21,224 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:21,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:21,224 INFO L82 PathProgramCache]: Analyzing trace with hash -2017066232, now seen corresponding path program 7 times [2020-10-13 23:31:21,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:21,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2128555490] [2020-10-13 23:31:21,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:21,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:21,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:21,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:21,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:21,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:21,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:26,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:26,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-13 23:31:26,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:31:26,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 23:31:26,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:26,250 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:26,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 23:31:26,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-13 23:31:26,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 23:31:26,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:31:26,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:26,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:26,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:26,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:26,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:26,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:26,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:31:26,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:26,317 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:26,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:26,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:26,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:26,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:26,326 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2020-10-13 23:31:26,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2128555490] [2020-10-13 23:31:26,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:26,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 23:31:26,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785925147] [2020-10-13 23:31:26,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 23:31:26,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:26,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 23:31:26,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:31:26,330 INFO L87 Difference]: Start difference. First operand 96 states and 103 transitions. Second operand 9 states. [2020-10-13 23:31:26,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:26,642 INFO L93 Difference]: Finished difference Result 185 states and 203 transitions. [2020-10-13 23:31:26,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 23:31:26,643 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 91 [2020-10-13 23:31:26,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:26,644 INFO L225 Difference]: With dead ends: 185 [2020-10-13 23:31:26,644 INFO L226 Difference]: Without dead ends: 114 [2020-10-13 23:31:26,645 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:31:26,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-13 23:31:26,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 108. [2020-10-13 23:31:26,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-13 23:31:26,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 115 transitions. [2020-10-13 23:31:26,664 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 115 transitions. Word has length 91 [2020-10-13 23:31:26,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:26,665 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 115 transitions. [2020-10-13 23:31:26,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 23:31:26,665 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 115 transitions. [2020-10-13 23:31:26,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-13 23:31:26,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:26,668 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 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] [2020-10-13 23:31:26,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 23:31:26,668 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:26,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:26,669 INFO L82 PathProgramCache]: Analyzing trace with hash -123690244, now seen corresponding path program 8 times [2020-10-13 23:31:26,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:26,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [234655193] [2020-10-13 23:31:26,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:26,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:26,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:26,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:26,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:26,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:26,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:31,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:31,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-13 23:31:31,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:31:31,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 23:31:31,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:31,694 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:31,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:31:31,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:31:31,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 23:31:31,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:31,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:31,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:31,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:31,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:31,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:31,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:31,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:31:31,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:31,747 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:31,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:31,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:31,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:31,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:31:31,755 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2020-10-13 23:31:31,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [234655193] [2020-10-13 23:31:31,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:31,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 23:31:31,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029090521] [2020-10-13 23:31:31,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 23:31:31,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:31,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 23:31:31,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:31:31,758 INFO L87 Difference]: Start difference. First operand 108 states and 115 transitions. Second operand 7 states. [2020-10-13 23:31:31,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:31,885 INFO L93 Difference]: Finished difference Result 206 states and 220 transitions. [2020-10-13 23:31:31,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 23:31:31,885 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 103 [2020-10-13 23:31:31,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:31,887 INFO L225 Difference]: With dead ends: 206 [2020-10-13 23:31:31,887 INFO L226 Difference]: Without dead ends: 111 [2020-10-13 23:31:31,887 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:31:31,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-13 23:31:31,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2020-10-13 23:31:31,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-13 23:31:31,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 117 transitions. [2020-10-13 23:31:31,894 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 117 transitions. Word has length 103 [2020-10-13 23:31:31,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:31,894 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 117 transitions. [2020-10-13 23:31:31,894 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 23:31:31,895 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 117 transitions. [2020-10-13 23:31:31,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-13 23:31:31,896 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:31,896 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 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] [2020-10-13 23:31:31,897 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 23:31:31,897 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:31,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:31,897 INFO L82 PathProgramCache]: Analyzing trace with hash -395922022, now seen corresponding path program 9 times [2020-10-13 23:31:31,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:31,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2041499138] [2020-10-13 23:31:31,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:31,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:31,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:31,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:31,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:32,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:32,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:36,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:36,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-13 23:31:36,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:31:36,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 23:31:36,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:36,920 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:36,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:31:36,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-13 23:31:36,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 23:31:36,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:37,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:37,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:37,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:37,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:37,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:37,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:37,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:31:37,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:37,005 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:37,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:37,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:37,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:37,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:31:37,016 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-10-13 23:31:37,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2041499138] [2020-10-13 23:31:37,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:37,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:31:37,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987639907] [2020-10-13 23:31:37,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:31:37,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:37,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:31:37,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:31:37,019 INFO L87 Difference]: Start difference. First operand 110 states and 117 transitions. Second operand 10 states. [2020-10-13 23:31:37,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:37,331 INFO L93 Difference]: Finished difference Result 209 states and 227 transitions. [2020-10-13 23:31:37,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 23:31:37,332 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 105 [2020-10-13 23:31:37,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:37,333 INFO L225 Difference]: With dead ends: 209 [2020-10-13 23:31:37,333 INFO L226 Difference]: Without dead ends: 128 [2020-10-13 23:31:37,336 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:31:37,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-13 23:31:37,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 122. [2020-10-13 23:31:37,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-13 23:31:37,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 129 transitions. [2020-10-13 23:31:37,343 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 129 transitions. Word has length 105 [2020-10-13 23:31:37,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:37,344 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 129 transitions. [2020-10-13 23:31:37,344 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:31:37,344 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 129 transitions. [2020-10-13 23:31:37,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-13 23:31:37,345 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:37,345 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 4, 4, 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] [2020-10-13 23:31:37,345 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 23:31:37,345 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:37,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:37,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1380656498, now seen corresponding path program 10 times [2020-10-13 23:31:37,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:37,347 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1348564010] [2020-10-13 23:31:37,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:37,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:37,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:37,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:37,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:37,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:37,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:42,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:42,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-13 23:31:42,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:31:42,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-13 23:31:42,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:42,386 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:42,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 23:31:42,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:31:42,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 23:31:42,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:42,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:42,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:42,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:42,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:42,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:42,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:42,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:31:42,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:42,449 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:42,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:42,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:42,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:42,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:42,461 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2020-10-13 23:31:42,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1348564010] [2020-10-13 23:31:42,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:42,462 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 23:31:42,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937739023] [2020-10-13 23:31:42,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 23:31:42,463 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:42,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 23:31:42,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:31:42,463 INFO L87 Difference]: Start difference. First operand 122 states and 129 transitions. Second operand 8 states. [2020-10-13 23:31:42,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:42,562 INFO L93 Difference]: Finished difference Result 232 states and 246 transitions. [2020-10-13 23:31:42,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 23:31:42,562 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 117 [2020-10-13 23:31:42,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:42,563 INFO L225 Difference]: With dead ends: 232 [2020-10-13 23:31:42,564 INFO L226 Difference]: Without dead ends: 125 [2020-10-13 23:31:42,564 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:31:42,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-13 23:31:42,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2020-10-13 23:31:42,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-13 23:31:42,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 131 transitions. [2020-10-13 23:31:42,570 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 131 transitions. Word has length 117 [2020-10-13 23:31:42,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:42,571 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 131 transitions. [2020-10-13 23:31:42,571 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 23:31:42,571 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 131 transitions. [2020-10-13 23:31:42,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-13 23:31:42,572 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:42,573 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 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] [2020-10-13 23:31:42,573 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 23:31:42,573 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:42,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:42,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1843331244, now seen corresponding path program 11 times [2020-10-13 23:31:42,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:42,574 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1818752173] [2020-10-13 23:31:42,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:42,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:42,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:42,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:42,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:42,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:43,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:47,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:47,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-13 23:31:47,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:31:47,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-13 23:31:47,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:47,615 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:47,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 23:31:47,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-13 23:31:47,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 23:31:47,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:47,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:47,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:47,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:47,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:47,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:47,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:47,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:31:47,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:47,709 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:47,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:47,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:47,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:47,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:47,720 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2020-10-13 23:31:47,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1818752173] [2020-10-13 23:31:47,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:47,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 23:31:47,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628827212] [2020-10-13 23:31:47,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 23:31:47,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:47,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 23:31:47,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:31:47,723 INFO L87 Difference]: Start difference. First operand 124 states and 131 transitions. Second operand 11 states. [2020-10-13 23:31:48,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:48,058 INFO L93 Difference]: Finished difference Result 233 states and 251 transitions. [2020-10-13 23:31:48,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 23:31:48,058 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 119 [2020-10-13 23:31:48,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:48,059 INFO L225 Difference]: With dead ends: 233 [2020-10-13 23:31:48,060 INFO L226 Difference]: Without dead ends: 142 [2020-10-13 23:31:48,060 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:31:48,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-13 23:31:48,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 136. [2020-10-13 23:31:48,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-13 23:31:48,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 143 transitions. [2020-10-13 23:31:48,068 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 143 transitions. Word has length 119 [2020-10-13 23:31:48,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:48,068 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 143 transitions. [2020-10-13 23:31:48,068 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 23:31:48,068 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 143 transitions. [2020-10-13 23:31:48,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-10-13 23:31:48,070 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:48,070 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 5, 5, 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] [2020-10-13 23:31:48,070 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 23:31:48,070 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:48,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:48,071 INFO L82 PathProgramCache]: Analyzing trace with hash -6034784, now seen corresponding path program 12 times [2020-10-13 23:31:48,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:48,071 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [376762420] [2020-10-13 23:31:48,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:48,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:48,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:48,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:48,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:48,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:48,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:53,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:53,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-13 23:31:53,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:31:53,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5041 [2020-10-13 23:31:53,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:53,132 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:53,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 23:31:53,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:31:53,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 23:31:53,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:53,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:53,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:53,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:53,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:53,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:53,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:53,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:31:53,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:53,188 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:53,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:53,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:53,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:53,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:53,198 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2020-10-13 23:31:53,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [376762420] [2020-10-13 23:31:53,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:53,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 23:31:53,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250812171] [2020-10-13 23:31:53,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 23:31:53,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:53,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 23:31:53,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:31:53,200 INFO L87 Difference]: Start difference. First operand 136 states and 143 transitions. Second operand 9 states. [2020-10-13 23:31:53,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:53,349 INFO L93 Difference]: Finished difference Result 258 states and 272 transitions. [2020-10-13 23:31:53,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 23:31:53,349 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 131 [2020-10-13 23:31:53,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:53,351 INFO L225 Difference]: With dead ends: 258 [2020-10-13 23:31:53,351 INFO L226 Difference]: Without dead ends: 139 [2020-10-13 23:31:53,351 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:31:53,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-13 23:31:53,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2020-10-13 23:31:53,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-13 23:31:53,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 145 transitions. [2020-10-13 23:31:53,358 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 145 transitions. Word has length 131 [2020-10-13 23:31:53,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:53,358 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 145 transitions. [2020-10-13 23:31:53,358 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 23:31:53,358 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 145 transitions. [2020-10-13 23:31:53,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-13 23:31:53,359 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:53,360 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 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] [2020-10-13 23:31:53,360 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 23:31:53,360 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:53,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:53,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1204421694, now seen corresponding path program 13 times [2020-10-13 23:31:53,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:53,361 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1166516026] [2020-10-13 23:31:53,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:53,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:53,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:53,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:53,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:53,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:54,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:58,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:58,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 141 [2020-10-13 23:31:58,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:31:58,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-13 23:31:58,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:58,413 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:58,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:31:58,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-13 23:31:58,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 23:31:58,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:58,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:58,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:58,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:58,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:58,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:58,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:58,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:31:58,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:58,520 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:58,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:58,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:58,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:58,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:58,530 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 356 trivial. 0 not checked. [2020-10-13 23:31:58,531 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1166516026] [2020-10-13 23:31:58,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:58,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:31:58,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469476334] [2020-10-13 23:31:58,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:31:58,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:58,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:31:58,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:31:58,533 INFO L87 Difference]: Start difference. First operand 138 states and 145 transitions. Second operand 12 states. [2020-10-13 23:31:58,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:58,939 INFO L93 Difference]: Finished difference Result 257 states and 275 transitions. [2020-10-13 23:31:58,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 23:31:58,940 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 133 [2020-10-13 23:31:58,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:58,941 INFO L225 Difference]: With dead ends: 257 [2020-10-13 23:31:58,942 INFO L226 Difference]: Without dead ends: 156 [2020-10-13 23:31:58,943 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:31:58,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-13 23:31:58,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 150. [2020-10-13 23:31:58,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-13 23:31:58,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 157 transitions. [2020-10-13 23:31:58,948 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 157 transitions. Word has length 133 [2020-10-13 23:31:58,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:58,949 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 157 transitions. [2020-10-13 23:31:58,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:31:58,949 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 157 transitions. [2020-10-13 23:31:58,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-13 23:31:58,950 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:58,950 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 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] [2020-10-13 23:31:58,950 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 23:31:58,951 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:58,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:58,951 INFO L82 PathProgramCache]: Analyzing trace with hash -883363022, now seen corresponding path program 14 times [2020-10-13 23:31:58,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:58,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1491103540] [2020-10-13 23:31:58,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:58,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:58,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:58,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:59,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:59,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:59,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:04,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:04,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 153 [2020-10-13 23:32:04,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:32:04,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5058 [2020-10-13 23:32:04,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:04,023 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:04,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 23:32:04,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-13 23:32:04,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 23:32:04,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:04,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:04,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:04,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:04,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:04,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:04,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:04,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:32:04,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:04,136 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:04,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:04,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:04,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:04,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:04,145 INFO L134 CoverageAnalysis]: Checked inductivity of 522 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2020-10-13 23:32:04,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1491103540] [2020-10-13 23:32:04,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:04,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 23:32:04,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017771389] [2020-10-13 23:32:04,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 23:32:04,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:04,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 23:32:04,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:32:04,147 INFO L87 Difference]: Start difference. First operand 150 states and 157 transitions. Second operand 13 states. [2020-10-13 23:32:04,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:04,558 INFO L93 Difference]: Finished difference Result 279 states and 297 transitions. [2020-10-13 23:32:04,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 23:32:04,558 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 145 [2020-10-13 23:32:04,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:04,560 INFO L225 Difference]: With dead ends: 279 [2020-10-13 23:32:04,560 INFO L226 Difference]: Without dead ends: 168 [2020-10-13 23:32:04,561 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:32:04,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-13 23:32:04,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 162. [2020-10-13 23:32:04,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-13 23:32:04,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 169 transitions. [2020-10-13 23:32:04,568 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 169 transitions. Word has length 145 [2020-10-13 23:32:04,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:04,569 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 169 transitions. [2020-10-13 23:32:04,569 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 23:32:04,569 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 169 transitions. [2020-10-13 23:32:04,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-10-13 23:32:04,571 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:04,571 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 6, 6, 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] [2020-10-13 23:32:04,571 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 23:32:04,571 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:04,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:04,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1752556582, now seen corresponding path program 15 times [2020-10-13 23:32:04,572 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:04,572 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1584091753] [2020-10-13 23:32:04,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:04,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:04,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:04,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:04,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:04,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:05,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:09,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:09,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-10-13 23:32:09,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:32:09,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5048 [2020-10-13 23:32:09,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:09,635 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:09,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:32:09,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:32:09,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 23:32:09,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:09,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:09,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:09,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:09,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:09,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:09,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:09,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:32:09,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:09,714 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:09,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:09,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:09,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:09,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:09,724 INFO L134 CoverageAnalysis]: Checked inductivity of 636 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2020-10-13 23:32:09,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1584091753] [2020-10-13 23:32:09,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:09,725 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:32:09,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247225010] [2020-10-13 23:32:09,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:32:09,726 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:09,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:32:09,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:32:09,727 INFO L87 Difference]: Start difference. First operand 162 states and 169 transitions. Second operand 10 states. [2020-10-13 23:32:09,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:09,840 INFO L93 Difference]: Finished difference Result 308 states and 322 transitions. [2020-10-13 23:32:09,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 23:32:09,840 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 157 [2020-10-13 23:32:09,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:09,842 INFO L225 Difference]: With dead ends: 308 [2020-10-13 23:32:09,842 INFO L226 Difference]: Without dead ends: 165 [2020-10-13 23:32:09,843 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:32:09,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-13 23:32:09,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2020-10-13 23:32:09,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-13 23:32:09,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 171 transitions. [2020-10-13 23:32:09,851 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 171 transitions. Word has length 157 [2020-10-13 23:32:09,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:09,851 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 171 transitions. [2020-10-13 23:32:09,851 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:32:09,851 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 171 transitions. [2020-10-13 23:32:09,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-10-13 23:32:09,853 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:09,853 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 7, 7, 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] [2020-10-13 23:32:09,853 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 23:32:09,854 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:09,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:09,854 INFO L82 PathProgramCache]: Analyzing trace with hash 2009535556, now seen corresponding path program 16 times [2020-10-13 23:32:09,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:09,854 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1995324884] [2020-10-13 23:32:09,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:09,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:09,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:09,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:09,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:09,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:11,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:14,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:14,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-13 23:32:14,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:32:14,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5078 [2020-10-13 23:32:14,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:14,948 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:14,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:32:14,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-13 23:32:14,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 23:32:14,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:15,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:15,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:15,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:15,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:15,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:15,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:15,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:32:15,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:15,075 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:15,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:15,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:15,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:15,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:15,085 INFO L134 CoverageAnalysis]: Checked inductivity of 649 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 549 trivial. 0 not checked. [2020-10-13 23:32:15,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1995324884] [2020-10-13 23:32:15,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:15,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:32:15,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998550769] [2020-10-13 23:32:15,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:32:15,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:15,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:32:15,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:32:15,088 INFO L87 Difference]: Start difference. First operand 164 states and 171 transitions. Second operand 14 states. [2020-10-13 23:32:15,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:15,472 INFO L93 Difference]: Finished difference Result 303 states and 321 transitions. [2020-10-13 23:32:15,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 23:32:15,473 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 159 [2020-10-13 23:32:15,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:15,474 INFO L225 Difference]: With dead ends: 303 [2020-10-13 23:32:15,474 INFO L226 Difference]: Without dead ends: 182 [2020-10-13 23:32:15,475 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:32:15,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-13 23:32:15,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 176. [2020-10-13 23:32:15,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-10-13 23:32:15,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 183 transitions. [2020-10-13 23:32:15,482 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 183 transitions. Word has length 159 [2020-10-13 23:32:15,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:15,482 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 183 transitions. [2020-10-13 23:32:15,482 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:32:15,482 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 183 transitions. [2020-10-13 23:32:15,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-10-13 23:32:15,484 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:15,484 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 7, 7, 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] [2020-10-13 23:32:15,485 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 23:32:15,485 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:15,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:15,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1363817928, now seen corresponding path program 17 times [2020-10-13 23:32:15,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:15,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [515584085] [2020-10-13 23:32:15,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:15,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:15,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:15,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:15,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:15,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:17,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:20,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:20,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-13 23:32:20,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:32:20,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5090 [2020-10-13 23:32:20,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:20,591 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:20,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 23:32:20,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:32:20,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 23:32:20,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:20,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:20,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:20,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:20,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:20,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:20,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:20,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:32:20,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:20,672 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:20,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:20,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:20,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:20,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:20,685 INFO L134 CoverageAnalysis]: Checked inductivity of 775 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 726 trivial. 0 not checked. [2020-10-13 23:32:20,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [515584085] [2020-10-13 23:32:20,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:20,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 23:32:20,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564970742] [2020-10-13 23:32:20,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 23:32:20,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:20,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 23:32:20,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:32:20,687 INFO L87 Difference]: Start difference. First operand 176 states and 183 transitions. Second operand 11 states. [2020-10-13 23:32:20,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:20,830 INFO L93 Difference]: Finished difference Result 334 states and 348 transitions. [2020-10-13 23:32:20,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 23:32:20,830 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 171 [2020-10-13 23:32:20,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:20,832 INFO L225 Difference]: With dead ends: 334 [2020-10-13 23:32:20,832 INFO L226 Difference]: Without dead ends: 179 [2020-10-13 23:32:20,832 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:32:20,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-13 23:32:20,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 178. [2020-10-13 23:32:20,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-10-13 23:32:20,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 185 transitions. [2020-10-13 23:32:20,840 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 185 transitions. Word has length 171 [2020-10-13 23:32:20,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:20,841 INFO L479 AbstractCegarLoop]: Abstraction has 178 states and 185 transitions. [2020-10-13 23:32:20,841 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 23:32:20,841 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 185 transitions. [2020-10-13 23:32:20,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-10-13 23:32:20,843 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:20,843 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 8, 8, 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] [2020-10-13 23:32:20,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 23:32:20,843 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:20,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:20,844 INFO L82 PathProgramCache]: Analyzing trace with hash -941003306, now seen corresponding path program 18 times [2020-10-13 23:32:20,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:20,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1441770507] [2020-10-13 23:32:20,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:20,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:20,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:20,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:20,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:20,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:22,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:25,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:25,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 181 [2020-10-13 23:32:25,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:32:25,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5090 [2020-10-13 23:32:25,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:25,950 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:25,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 23:32:25,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-13 23:32:25,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 23:32:25,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:26,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:26,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:26,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:26,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:26,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:26,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:26,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:32:26,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:26,097 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:26,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:26,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:26,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:26,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:26,110 INFO L134 CoverageAnalysis]: Checked inductivity of 790 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 669 trivial. 0 not checked. [2020-10-13 23:32:26,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1441770507] [2020-10-13 23:32:26,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:26,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 23:32:26,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520843983] [2020-10-13 23:32:26,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 23:32:26,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:26,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 23:32:26,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:32:26,112 INFO L87 Difference]: Start difference. First operand 178 states and 185 transitions. Second operand 15 states. [2020-10-13 23:32:26,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:26,586 INFO L93 Difference]: Finished difference Result 327 states and 345 transitions. [2020-10-13 23:32:26,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 23:32:26,587 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 173 [2020-10-13 23:32:26,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:26,588 INFO L225 Difference]: With dead ends: 327 [2020-10-13 23:32:26,588 INFO L226 Difference]: Without dead ends: 196 [2020-10-13 23:32:26,589 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:32:26,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-13 23:32:26,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 190. [2020-10-13 23:32:26,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-10-13 23:32:26,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 197 transitions. [2020-10-13 23:32:26,598 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 197 transitions. Word has length 173 [2020-10-13 23:32:26,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:26,598 INFO L479 AbstractCegarLoop]: Abstraction has 190 states and 197 transitions. [2020-10-13 23:32:26,598 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 23:32:26,598 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 197 transitions. [2020-10-13 23:32:26,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-10-13 23:32:26,600 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:26,600 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 8, 8, 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] [2020-10-13 23:32:26,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 23:32:26,601 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:26,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:26,601 INFO L82 PathProgramCache]: Analyzing trace with hash 2126325962, now seen corresponding path program 19 times [2020-10-13 23:32:26,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:26,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1418021173] [2020-10-13 23:32:26,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:26,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:26,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:26,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:26,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:26,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:28,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:31,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:31,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 193 [2020-10-13 23:32:31,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:32:31,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5065 [2020-10-13 23:32:31,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:31,683 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:31,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:32:31,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-13 23:32:31,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 23:32:31,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:31,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:31,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:31,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:31,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:31,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:31,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:31,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:32:31,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:31,851 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:31,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:31,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:31,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:31,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:31,866 INFO L134 CoverageAnalysis]: Checked inductivity of 928 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-10-13 23:32:31,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1418021173] [2020-10-13 23:32:31,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:31,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:32:31,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289577004] [2020-10-13 23:32:31,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:32:31,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:31,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:32:31,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:32:31,868 INFO L87 Difference]: Start difference. First operand 190 states and 197 transitions. Second operand 16 states. [2020-10-13 23:32:32,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:32,325 INFO L93 Difference]: Finished difference Result 349 states and 367 transitions. [2020-10-13 23:32:32,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 23:32:32,327 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 185 [2020-10-13 23:32:32,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:32,328 INFO L225 Difference]: With dead ends: 349 [2020-10-13 23:32:32,329 INFO L226 Difference]: Without dead ends: 208 [2020-10-13 23:32:32,329 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:32:32,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-13 23:32:32,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 202. [2020-10-13 23:32:32,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-10-13 23:32:32,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 209 transitions. [2020-10-13 23:32:32,337 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 209 transitions. Word has length 185 [2020-10-13 23:32:32,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:32,338 INFO L479 AbstractCegarLoop]: Abstraction has 202 states and 209 transitions. [2020-10-13 23:32:32,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:32:32,338 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 209 transitions. [2020-10-13 23:32:32,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-10-13 23:32:32,339 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:32,340 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 8, 8, 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] [2020-10-13 23:32:32,340 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 23:32:32,340 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:32,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:32,340 INFO L82 PathProgramCache]: Analyzing trace with hash -306649666, now seen corresponding path program 20 times [2020-10-13 23:32:32,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:32,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1170091447] [2020-10-13 23:32:32,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:32,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:32,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:32,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:32,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:32,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:34,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:37,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:37,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 205 [2020-10-13 23:32:37,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:32:37,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5108 [2020-10-13 23:32:37,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:37,465 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:37,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:32:37,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:32:37,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 23:32:37,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:37,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:37,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:37,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:37,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:37,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:37,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:37,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:32:37,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:37,558 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:37,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:37,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:37,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:37,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:37,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1078 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 1014 trivial. 0 not checked. [2020-10-13 23:32:37,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1170091447] [2020-10-13 23:32:37,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:37,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:32:37,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970102454] [2020-10-13 23:32:37,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:32:37,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:37,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:32:37,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:32:37,577 INFO L87 Difference]: Start difference. First operand 202 states and 209 transitions. Second operand 12 states. [2020-10-13 23:32:37,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:37,721 INFO L93 Difference]: Finished difference Result 384 states and 398 transitions. [2020-10-13 23:32:37,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 23:32:37,721 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 197 [2020-10-13 23:32:37,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:37,723 INFO L225 Difference]: With dead ends: 384 [2020-10-13 23:32:37,723 INFO L226 Difference]: Without dead ends: 205 [2020-10-13 23:32:37,725 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:32:37,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-10-13 23:32:37,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 204. [2020-10-13 23:32:37,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-10-13 23:32:37,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 211 transitions. [2020-10-13 23:32:37,732 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 211 transitions. Word has length 197 [2020-10-13 23:32:37,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:37,732 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 211 transitions. [2020-10-13 23:32:37,733 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:32:37,733 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 211 transitions. [2020-10-13 23:32:37,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-10-13 23:32:37,734 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:37,734 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 9, 9, 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] [2020-10-13 23:32:37,734 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 23:32:37,735 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:37,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:37,735 INFO L82 PathProgramCache]: Analyzing trace with hash 450830300, now seen corresponding path program 21 times [2020-10-13 23:32:37,735 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:37,735 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [26803012] [2020-10-13 23:32:37,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:37,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:37,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:37,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:37,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:37,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:43,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:43,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 207 [2020-10-13 23:32:43,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:32:43,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5315 [2020-10-13 23:32:43,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:43,068 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:43,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 23:32:43,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-13 23:32:43,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 23:32:43,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:43,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:43,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:43,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:43,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:43,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:43,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:43,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:32:43,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:43,234 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:43,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:43,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:43,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:43,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:43,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1095 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 926 trivial. 0 not checked. [2020-10-13 23:32:43,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [26803012] [2020-10-13 23:32:43,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:43,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 23:32:43,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767017638] [2020-10-13 23:32:43,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 23:32:43,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:43,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 23:32:43,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:32:43,260 INFO L87 Difference]: Start difference. First operand 204 states and 211 transitions. Second operand 17 states. [2020-10-13 23:32:43,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:43,761 INFO L93 Difference]: Finished difference Result 373 states and 391 transitions. [2020-10-13 23:32:43,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 23:32:43,762 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 199 [2020-10-13 23:32:43,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:43,764 INFO L225 Difference]: With dead ends: 373 [2020-10-13 23:32:43,764 INFO L226 Difference]: Without dead ends: 222 [2020-10-13 23:32:43,766 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:32:43,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-13 23:32:43,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 216. [2020-10-13 23:32:43,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-10-13 23:32:43,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 223 transitions. [2020-10-13 23:32:43,778 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 223 transitions. Word has length 199 [2020-10-13 23:32:43,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:43,779 INFO L479 AbstractCegarLoop]: Abstraction has 216 states and 223 transitions. [2020-10-13 23:32:43,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 23:32:43,779 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 223 transitions. [2020-10-13 23:32:43,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-10-13 23:32:43,781 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:43,782 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 9, 9, 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] [2020-10-13 23:32:43,785 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 23:32:43,787 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:43,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:43,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1225236944, now seen corresponding path program 22 times [2020-10-13 23:32:43,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:43,788 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1605893275] [2020-10-13 23:32:43,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:43,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:43,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:43,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:43,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:44,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:47,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:48,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:48,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 219 [2020-10-13 23:32:48,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:32:48,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5140 [2020-10-13 23:32:48,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:48,949 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:48,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 23:32:48,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:32:48,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 23:32:48,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:49,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:49,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:49,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:49,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:49,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:49,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:49,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:32:49,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:49,058 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:49,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:49,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:49,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:49,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:49,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1257 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 1176 trivial. 0 not checked. [2020-10-13 23:32:49,083 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1605893275] [2020-10-13 23:32:49,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:49,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 23:32:49,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278912825] [2020-10-13 23:32:49,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 23:32:49,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:49,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 23:32:49,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:32:49,085 INFO L87 Difference]: Start difference. First operand 216 states and 223 transitions. Second operand 13 states. [2020-10-13 23:32:49,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:49,223 INFO L93 Difference]: Finished difference Result 410 states and 424 transitions. [2020-10-13 23:32:49,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 23:32:49,223 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 211 [2020-10-13 23:32:49,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:49,225 INFO L225 Difference]: With dead ends: 410 [2020-10-13 23:32:49,225 INFO L226 Difference]: Without dead ends: 219 [2020-10-13 23:32:49,226 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:32:49,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-13 23:32:49,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 218. [2020-10-13 23:32:49,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2020-10-13 23:32:49,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 225 transitions. [2020-10-13 23:32:49,234 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 225 transitions. Word has length 211 [2020-10-13 23:32:49,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:49,234 INFO L479 AbstractCegarLoop]: Abstraction has 218 states and 225 transitions. [2020-10-13 23:32:49,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 23:32:49,234 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 225 transitions. [2020-10-13 23:32:49,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2020-10-13 23:32:49,236 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:49,236 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 10, 10, 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] [2020-10-13 23:32:49,236 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 23:32:49,236 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:49,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:49,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1183395986, now seen corresponding path program 23 times [2020-10-13 23:32:49,237 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:49,237 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [815015255] [2020-10-13 23:32:49,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:49,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:49,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:49,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:49,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:49,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:49,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:54,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:54,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 221 [2020-10-13 23:32:54,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:32:54,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5055 [2020-10-13 23:32:54,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:54,311 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:54,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 23:32:54,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-13 23:32:54,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 23:32:54,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:54,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:54,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:54,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:54,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:54,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:54,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:54,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:32:54,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:54,495 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:54,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:54,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:54,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:54,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:54,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1276 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1080 trivial. 0 not checked. [2020-10-13 23:32:54,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [815015255] [2020-10-13 23:32:54,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:54,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 23:32:54,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748620653] [2020-10-13 23:32:54,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 23:32:54,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:54,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 23:32:54,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:32:54,518 INFO L87 Difference]: Start difference. First operand 218 states and 225 transitions. Second operand 18 states. [2020-10-13 23:32:54,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:54,990 INFO L93 Difference]: Finished difference Result 397 states and 415 transitions. [2020-10-13 23:32:54,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 23:32:54,991 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 213 [2020-10-13 23:32:54,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:54,992 INFO L225 Difference]: With dead ends: 397 [2020-10-13 23:32:54,992 INFO L226 Difference]: Without dead ends: 236 [2020-10-13 23:32:54,993 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:32:54,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-10-13 23:32:55,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 230. [2020-10-13 23:32:55,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2020-10-13 23:32:55,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 237 transitions. [2020-10-13 23:32:55,002 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 237 transitions. Word has length 213 [2020-10-13 23:32:55,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:55,003 INFO L479 AbstractCegarLoop]: Abstraction has 230 states and 237 transitions. [2020-10-13 23:32:55,003 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 23:32:55,003 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 237 transitions. [2020-10-13 23:32:55,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-10-13 23:32:55,004 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:55,004 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 10, 10, 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] [2020-10-13 23:32:55,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 23:32:55,005 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:55,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:55,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1302287970, now seen corresponding path program 24 times [2020-10-13 23:32:55,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:55,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1901485027] [2020-10-13 23:32:55,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:55,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:55,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:55,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:55,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:55,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:58,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:00,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:00,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 233 [2020-10-13 23:33:00,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:33:00,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5084 [2020-10-13 23:33:00,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:00,120 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:00,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:33:00,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:33:00,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 23:33:00,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:00,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:33:00,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:00,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:00,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:00,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:33:00,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:33:00,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:33:00,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:00,254 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:00,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:33:00,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:33:00,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:33:00,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:00,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1450 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1350 trivial. 0 not checked. [2020-10-13 23:33:00,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1901485027] [2020-10-13 23:33:00,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:33:00,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:33:00,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798463214] [2020-10-13 23:33:00,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:33:00,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:33:00,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:33:00,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:33:00,275 INFO L87 Difference]: Start difference. First operand 230 states and 237 transitions. Second operand 14 states. [2020-10-13 23:33:00,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:33:00,417 INFO L93 Difference]: Finished difference Result 436 states and 450 transitions. [2020-10-13 23:33:00,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 23:33:00,418 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 225 [2020-10-13 23:33:00,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:33:00,419 INFO L225 Difference]: With dead ends: 436 [2020-10-13 23:33:00,419 INFO L226 Difference]: Without dead ends: 233 [2020-10-13 23:33:00,420 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:33:00,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-13 23:33:00,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 232. [2020-10-13 23:33:00,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-10-13 23:33:00,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 239 transitions. [2020-10-13 23:33:00,429 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 239 transitions. Word has length 225 [2020-10-13 23:33:00,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:33:00,430 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 239 transitions. [2020-10-13 23:33:00,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:33:00,430 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 239 transitions. [2020-10-13 23:33:00,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2020-10-13 23:33:00,431 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:33:00,431 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 11, 11, 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] [2020-10-13 23:33:00,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 23:33:00,432 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:33:00,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:33:00,432 INFO L82 PathProgramCache]: Analyzing trace with hash -689481856, now seen corresponding path program 25 times [2020-10-13 23:33:00,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:33:00,432 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [680520896] [2020-10-13 23:33:00,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:33:00,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:00,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:00,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:00,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:00,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:05,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:05,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:05,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 235 [2020-10-13 23:33:05,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:33:05,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5278 [2020-10-13 23:33:05,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:05,734 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:05,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 23:33:05,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 99 [2020-10-13 23:33:05,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 23:33:05,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:05,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:33:05,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:05,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:05,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:05,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:33:05,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:33:05,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:33:05,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:05,960 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:05,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:33:05,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:33:05,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:33:05,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:05,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1471 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 1246 trivial. 0 not checked. [2020-10-13 23:33:05,982 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [680520896] [2020-10-13 23:33:05,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:33:05,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 23:33:05,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582151416] [2020-10-13 23:33:05,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 23:33:05,983 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:33:05,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 23:33:05,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:33:05,984 INFO L87 Difference]: Start difference. First operand 232 states and 239 transitions. Second operand 19 states. [2020-10-13 23:33:06,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:33:06,582 INFO L93 Difference]: Finished difference Result 421 states and 439 transitions. [2020-10-13 23:33:06,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 23:33:06,583 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 227 [2020-10-13 23:33:06,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:33:06,584 INFO L225 Difference]: With dead ends: 421 [2020-10-13 23:33:06,585 INFO L226 Difference]: Without dead ends: 250 [2020-10-13 23:33:06,586 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:33:06,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-10-13 23:33:06,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 244. [2020-10-13 23:33:06,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-10-13 23:33:06,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 251 transitions. [2020-10-13 23:33:06,595 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 251 transitions. Word has length 227 [2020-10-13 23:33:06,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:33:06,595 INFO L479 AbstractCegarLoop]: Abstraction has 244 states and 251 transitions. [2020-10-13 23:33:06,595 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 23:33:06,595 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 251 transitions. [2020-10-13 23:33:06,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-10-13 23:33:06,597 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:33:06,597 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 11, 11, 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] [2020-10-13 23:33:06,597 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 23:33:06,597 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:33:06,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:33:06,598 INFO L82 PathProgramCache]: Analyzing trace with hash -114089100, now seen corresponding path program 26 times [2020-10-13 23:33:06,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:33:06,598 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1247131021] [2020-10-13 23:33:06,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:33:06,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:06,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:06,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:06,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:06,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:11,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:11,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:11,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 247 [2020-10-13 23:33:11,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:33:11,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5128 [2020-10-13 23:33:11,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:11,749 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:11,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 23:33:11,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 103 [2020-10-13 23:33:11,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 23:33:11,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:11,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:33:11,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:11,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:11,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:11,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:33:11,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:33:11,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:33:11,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:11,997 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:11,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:33:11,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:33:11,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:33:11,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:12,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1657 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 1401 trivial. 0 not checked. [2020-10-13 23:33:12,021 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1247131021] [2020-10-13 23:33:12,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:33:12,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 23:33:12,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935199309] [2020-10-13 23:33:12,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 23:33:12,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:33:12,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 23:33:12,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:33:12,023 INFO L87 Difference]: Start difference. First operand 244 states and 251 transitions. Second operand 20 states. [2020-10-13 23:33:12,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:33:12,606 INFO L93 Difference]: Finished difference Result 443 states and 461 transitions. [2020-10-13 23:33:12,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 23:33:12,609 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 239 [2020-10-13 23:33:12,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:33:12,611 INFO L225 Difference]: With dead ends: 443 [2020-10-13 23:33:12,611 INFO L226 Difference]: Without dead ends: 262 [2020-10-13 23:33:12,612 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:33:12,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-10-13 23:33:12,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 256. [2020-10-13 23:33:12,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-10-13 23:33:12,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 263 transitions. [2020-10-13 23:33:12,627 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 263 transitions. Word has length 239 [2020-10-13 23:33:12,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:33:12,627 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 263 transitions. [2020-10-13 23:33:12,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 23:33:12,627 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 263 transitions. [2020-10-13 23:33:12,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2020-10-13 23:33:12,629 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:33:12,629 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 11, 11, 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] [2020-10-13 23:33:12,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 23:33:12,629 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:33:12,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:33:12,631 INFO L82 PathProgramCache]: Analyzing trace with hash -844795544, now seen corresponding path program 27 times [2020-10-13 23:33:12,631 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:33:12,631 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1444736003] [2020-10-13 23:33:12,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:33:12,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:12,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:12,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:12,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:12,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:17,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:17,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 259 [2020-10-13 23:33:17,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:33:17,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5312 [2020-10-13 23:33:17,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:17,969 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:17,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 23:33:17,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:33:17,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 23:33:17,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:18,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:33:18,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:18,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:18,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:18,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:33:18,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:33:18,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:33:18,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:18,143 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:18,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:33:18,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:33:18,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:33:18,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:33:18,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1855 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 1734 trivial. 0 not checked. [2020-10-13 23:33:18,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1444736003] [2020-10-13 23:33:18,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:33:18,219 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 23:33:18,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201009416] [2020-10-13 23:33:18,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 23:33:18,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:33:18,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 23:33:18,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:33:18,221 INFO L87 Difference]: Start difference. First operand 256 states and 263 transitions. Second operand 15 states. [2020-10-13 23:33:18,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:33:18,441 INFO L93 Difference]: Finished difference Result 486 states and 500 transitions. [2020-10-13 23:33:18,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 23:33:18,442 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 251 [2020-10-13 23:33:18,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:33:18,444 INFO L225 Difference]: With dead ends: 486 [2020-10-13 23:33:18,444 INFO L226 Difference]: Without dead ends: 259 [2020-10-13 23:33:18,446 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:33:18,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-10-13 23:33:18,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 258. [2020-10-13 23:33:18,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-10-13 23:33:18,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 265 transitions. [2020-10-13 23:33:18,459 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 265 transitions. Word has length 251 [2020-10-13 23:33:18,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:33:18,459 INFO L479 AbstractCegarLoop]: Abstraction has 258 states and 265 transitions. [2020-10-13 23:33:18,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 23:33:18,460 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 265 transitions. [2020-10-13 23:33:18,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2020-10-13 23:33:18,462 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:33:18,463 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 12, 12, 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] [2020-10-13 23:33:18,463 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 23:33:18,463 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:33:18,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:33:18,464 INFO L82 PathProgramCache]: Analyzing trace with hash -713152250, now seen corresponding path program 28 times [2020-10-13 23:33:18,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:33:18,464 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [776535187] [2020-10-13 23:33:18,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:33:18,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:18,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:18,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:18,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:18,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:23,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:23,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 261 [2020-10-13 23:33:23,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:33:23,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5309 [2020-10-13 23:33:23,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:23,811 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:23,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 23:33:23,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-13 23:33:23,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 23:33:23,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:33:24,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:33:24,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:24,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:24,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:24,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:33:24,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:33:24,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:33:24,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:24,156 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:24,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:33:24,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:33:24,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:33:24,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:33:24,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1878 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 1589 trivial. 0 not checked. [2020-10-13 23:33:24,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [776535187] [2020-10-13 23:33:24,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:33:24,203 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 23:33:24,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877870473] [2020-10-13 23:33:24,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 23:33:24,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:33:24,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 23:33:24,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:33:24,206 INFO L87 Difference]: Start difference. First operand 258 states and 265 transitions. Second operand 21 states. [2020-10-13 23:33:24,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:33:24,903 INFO L93 Difference]: Finished difference Result 467 states and 485 transitions. [2020-10-13 23:33:24,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 23:33:24,904 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 253 [2020-10-13 23:33:24,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:33:24,906 INFO L225 Difference]: With dead ends: 467 [2020-10-13 23:33:24,906 INFO L226 Difference]: Without dead ends: 276 [2020-10-13 23:33:24,907 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:33:24,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-10-13 23:33:24,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 270. [2020-10-13 23:33:24,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-10-13 23:33:24,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 277 transitions. [2020-10-13 23:33:24,917 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 277 transitions. Word has length 253 [2020-10-13 23:33:24,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:33:24,917 INFO L479 AbstractCegarLoop]: Abstraction has 270 states and 277 transitions. [2020-10-13 23:33:24,918 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 23:33:24,918 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 277 transitions. [2020-10-13 23:33:24,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2020-10-13 23:33:24,920 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:33:24,920 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 12, 12, 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] [2020-10-13 23:33:24,921 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 23:33:24,921 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:33:24,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:33:24,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1911849990, now seen corresponding path program 29 times [2020-10-13 23:33:24,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:33:24,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [203091084] [2020-10-13 23:33:24,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:33:24,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:24,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:25,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:25,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:25,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:30,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:30,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 273 [2020-10-13 23:33:30,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:33:30,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5114 [2020-10-13 23:33:30,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:30,066 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:30,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:33:30,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:33:30,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 23:33:30,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:30,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:33:30,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:30,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:30,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:30,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:33:30,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:33:30,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:33:30,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:30,232 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:30,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:33:30,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:33:30,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:33:30,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:30,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2088 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 1944 trivial. 0 not checked. [2020-10-13 23:33:30,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [203091084] [2020-10-13 23:33:30,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:33:30,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:33:30,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977742205] [2020-10-13 23:33:30,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:33:30,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:33:30,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:33:30,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:33:30,259 INFO L87 Difference]: Start difference. First operand 270 states and 277 transitions. Second operand 16 states. [2020-10-13 23:33:30,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:33:30,428 INFO L93 Difference]: Finished difference Result 512 states and 526 transitions. [2020-10-13 23:33:30,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 23:33:30,428 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 265 [2020-10-13 23:33:30,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:33:30,429 INFO L225 Difference]: With dead ends: 512 [2020-10-13 23:33:30,430 INFO L226 Difference]: Without dead ends: 273 [2020-10-13 23:33:30,431 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:33:30,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-10-13 23:33:30,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 272. [2020-10-13 23:33:30,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-10-13 23:33:30,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 279 transitions. [2020-10-13 23:33:30,439 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 279 transitions. Word has length 265 [2020-10-13 23:33:30,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:33:30,439 INFO L479 AbstractCegarLoop]: Abstraction has 272 states and 279 transitions. [2020-10-13 23:33:30,439 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:33:30,440 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 279 transitions. [2020-10-13 23:33:30,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2020-10-13 23:33:30,441 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:33:30,441 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 13, 13, 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] [2020-10-13 23:33:30,442 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 23:33:30,442 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:33:30,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:33:30,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1245939480, now seen corresponding path program 30 times [2020-10-13 23:33:30,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:33:30,442 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [587034579] [2020-10-13 23:33:30,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:33:30,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:30,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:30,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:30,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:30,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:35,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:35,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 275 [2020-10-13 23:33:35,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:33:35,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5128 [2020-10-13 23:33:35,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:35,596 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:35,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 23:33:35,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 77 [2020-10-13 23:33:35,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 23:33:35,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:35,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:33:35,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:35,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:35,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:35,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:33:35,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:33:35,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:33:35,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:35,908 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:35,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:33:35,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:33:35,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:33:35,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:35,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 1789 trivial. 0 not checked. [2020-10-13 23:33:35,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [587034579] [2020-10-13 23:33:35,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:33:35,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 23:33:35,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296561639] [2020-10-13 23:33:35,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 23:33:35,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:33:35,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 23:33:35,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:33:35,946 INFO L87 Difference]: Start difference. First operand 272 states and 279 transitions. Second operand 22 states. [2020-10-13 23:33:36,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:33:36,556 INFO L93 Difference]: Finished difference Result 491 states and 509 transitions. [2020-10-13 23:33:36,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 23:33:36,556 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 267 [2020-10-13 23:33:36,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:33:36,558 INFO L225 Difference]: With dead ends: 491 [2020-10-13 23:33:36,558 INFO L226 Difference]: Without dead ends: 290 [2020-10-13 23:33:36,559 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:33:36,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-10-13 23:33:36,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 284. [2020-10-13 23:33:36,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-10-13 23:33:36,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 291 transitions. [2020-10-13 23:33:36,570 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 291 transitions. Word has length 267 [2020-10-13 23:33:36,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:33:36,571 INFO L479 AbstractCegarLoop]: Abstraction has 284 states and 291 transitions. [2020-10-13 23:33:36,571 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 23:33:36,571 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 291 transitions. [2020-10-13 23:33:36,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2020-10-13 23:33:36,573 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:33:36,573 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 13, 13, 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] [2020-10-13 23:33:36,573 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 23:33:36,573 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:33:36,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:33:36,574 INFO L82 PathProgramCache]: Analyzing trace with hash 2144280332, now seen corresponding path program 31 times [2020-10-13 23:33:36,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:33:36,574 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [356824009] [2020-10-13 23:33:36,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:33:36,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:36,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:36,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:36,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:36,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:36,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:41,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:41,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-13 23:33:41,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:33:41,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5165 [2020-10-13 23:33:41,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:41,764 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:41,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 23:33:41,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 159 [2020-10-13 23:33:41,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 23:33:41,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:42,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:33:42,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:42,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:42,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:42,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:33:42,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:33:42,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:33:42,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:42,111 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:42,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:33:42,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:33:42,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:33:42,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:42,146 INFO L134 CoverageAnalysis]: Checked inductivity of 2335 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 1974 trivial. 0 not checked. [2020-10-13 23:33:42,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [356824009] [2020-10-13 23:33:42,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:33:42,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 23:33:42,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208733123] [2020-10-13 23:33:42,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 23:33:42,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:33:42,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 23:33:42,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 23:33:42,148 INFO L87 Difference]: Start difference. First operand 284 states and 291 transitions. Second operand 23 states. [2020-10-13 23:33:42,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:33:42,773 INFO L93 Difference]: Finished difference Result 513 states and 531 transitions. [2020-10-13 23:33:42,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 23:33:42,774 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 279 [2020-10-13 23:33:42,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:33:42,776 INFO L225 Difference]: With dead ends: 513 [2020-10-13 23:33:42,776 INFO L226 Difference]: Without dead ends: 302 [2020-10-13 23:33:42,777 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 23:33:42,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2020-10-13 23:33:42,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 296. [2020-10-13 23:33:42,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2020-10-13 23:33:42,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 303 transitions. [2020-10-13 23:33:42,786 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 303 transitions. Word has length 279 [2020-10-13 23:33:42,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:33:42,786 INFO L479 AbstractCegarLoop]: Abstraction has 296 states and 303 transitions. [2020-10-13 23:33:42,786 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 23:33:42,786 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 303 transitions. [2020-10-13 23:33:42,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2020-10-13 23:33:42,788 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:33:42,788 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 13, 13, 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] [2020-10-13 23:33:42,788 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 23:33:42,789 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:33:42,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:33:42,789 INFO L82 PathProgramCache]: Analyzing trace with hash -962905856, now seen corresponding path program 32 times [2020-10-13 23:33:42,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:33:42,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1560153721] [2020-10-13 23:33:42,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:33:42,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:42,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:42,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:42,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:43,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:47,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:47,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 299 [2020-10-13 23:33:47,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:33:47,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5110 [2020-10-13 23:33:47,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:47,925 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:47,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 23:33:47,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:33:47,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 23:33:47,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:48,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:33:48,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:48,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:48,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:48,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:33:48,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:33:48,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:33:48,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:48,133 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:48,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:33:48,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:33:48,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:33:48,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:48,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2569 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 2400 trivial. 0 not checked. [2020-10-13 23:33:48,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1560153721] [2020-10-13 23:33:48,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:33:48,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 23:33:48,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402553791] [2020-10-13 23:33:48,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 23:33:48,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:33:48,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 23:33:48,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:33:48,217 INFO L87 Difference]: Start difference. First operand 296 states and 303 transitions. Second operand 17 states. [2020-10-13 23:33:48,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:33:48,387 INFO L93 Difference]: Finished difference Result 562 states and 576 transitions. [2020-10-13 23:33:48,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 23:33:48,388 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 291 [2020-10-13 23:33:48,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:33:48,390 INFO L225 Difference]: With dead ends: 562 [2020-10-13 23:33:48,390 INFO L226 Difference]: Without dead ends: 299 [2020-10-13 23:33:48,392 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:33:48,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-10-13 23:33:48,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 298. [2020-10-13 23:33:48,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2020-10-13 23:33:48,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 305 transitions. [2020-10-13 23:33:48,400 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 305 transitions. Word has length 291 [2020-10-13 23:33:48,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:33:48,400 INFO L479 AbstractCegarLoop]: Abstraction has 298 states and 305 transitions. [2020-10-13 23:33:48,400 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 23:33:48,400 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 305 transitions. [2020-10-13 23:33:48,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2020-10-13 23:33:48,402 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:33:48,402 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 14, 14, 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] [2020-10-13 23:33:48,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 23:33:48,403 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:33:48,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:33:48,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1611365022, now seen corresponding path program 33 times [2020-10-13 23:33:48,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:33:48,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [985940267] [2020-10-13 23:33:48,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:33:48,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:48,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:48,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:48,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:48,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:48,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:53,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:53,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 301 [2020-10-13 23:33:53,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:33:53,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5350 [2020-10-13 23:33:53,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:53,783 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:53,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 23:33:53,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-13 23:33:53,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 23:33:53,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:54,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:33:54,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:54,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:54,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:54,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:33:54,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:33:54,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:33:54,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:54,129 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:54,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:33:54,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:33:54,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:33:54,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:54,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2596 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 2196 trivial. 0 not checked. [2020-10-13 23:33:54,162 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [985940267] [2020-10-13 23:33:54,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:33:54,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 23:33:54,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405276654] [2020-10-13 23:33:54,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 23:33:54,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:33:54,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 23:33:54,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:33:54,163 INFO L87 Difference]: Start difference. First operand 298 states and 305 transitions. Second operand 24 states. [2020-10-13 23:33:54,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:33:54,891 INFO L93 Difference]: Finished difference Result 537 states and 555 transitions. [2020-10-13 23:33:54,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 23:33:54,892 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 293 [2020-10-13 23:33:54,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:33:54,894 INFO L225 Difference]: With dead ends: 537 [2020-10-13 23:33:54,894 INFO L226 Difference]: Without dead ends: 316 [2020-10-13 23:33:54,895 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:33:54,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2020-10-13 23:33:54,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 310. [2020-10-13 23:33:54,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 310 states. [2020-10-13 23:33:54,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 317 transitions. [2020-10-13 23:33:54,905 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 317 transitions. Word has length 293 [2020-10-13 23:33:54,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:33:54,906 INFO L479 AbstractCegarLoop]: Abstraction has 310 states and 317 transitions. [2020-10-13 23:33:54,906 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 23:33:54,906 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 317 transitions. [2020-10-13 23:33:54,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2020-10-13 23:33:54,907 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:33:54,908 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 14, 14, 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] [2020-10-13 23:33:54,908 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 23:33:54,908 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:33:54,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:33:54,908 INFO L82 PathProgramCache]: Analyzing trace with hash -519202414, now seen corresponding path program 34 times [2020-10-13 23:33:54,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:33:54,909 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [379042062] [2020-10-13 23:33:54,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:33:54,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:54,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:55,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:55,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:55,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:00,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:00,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 313 [2020-10-13 23:34:00,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:34:00,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5483 [2020-10-13 23:34:00,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:00,419 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:00,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 23:34:00,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:34:00,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 23:34:00,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:00,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:00,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:00,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:00,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:00,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:00,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:00,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:34:00,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:00,611 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:00,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:00,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:00,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:00,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:00,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2842 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2646 trivial. 0 not checked. [2020-10-13 23:34:00,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [379042062] [2020-10-13 23:34:00,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:00,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 23:34:00,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790071150] [2020-10-13 23:34:00,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 23:34:00,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:00,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 23:34:00,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:34:00,678 INFO L87 Difference]: Start difference. First operand 310 states and 317 transitions. Second operand 18 states. [2020-10-13 23:34:00,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:00,863 INFO L93 Difference]: Finished difference Result 588 states and 602 transitions. [2020-10-13 23:34:00,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 23:34:00,863 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 305 [2020-10-13 23:34:00,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:00,866 INFO L225 Difference]: With dead ends: 588 [2020-10-13 23:34:00,867 INFO L226 Difference]: Without dead ends: 313 [2020-10-13 23:34:00,868 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:34:00,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-10-13 23:34:00,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 312. [2020-10-13 23:34:00,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2020-10-13 23:34:00,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 319 transitions. [2020-10-13 23:34:00,876 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 319 transitions. Word has length 305 [2020-10-13 23:34:00,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:00,877 INFO L479 AbstractCegarLoop]: Abstraction has 312 states and 319 transitions. [2020-10-13 23:34:00,877 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 23:34:00,877 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 319 transitions. [2020-10-13 23:34:00,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2020-10-13 23:34:00,879 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:00,879 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 15, 15, 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] [2020-10-13 23:34:00,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 23:34:00,880 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:00,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:00,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1642311344, now seen corresponding path program 35 times [2020-10-13 23:34:00,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:00,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [691034551] [2020-10-13 23:34:00,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:00,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:00,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:00,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:01,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:01,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:06,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:06,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 315 [2020-10-13 23:34:06,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:34:06,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5352 [2020-10-13 23:34:06,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:06,259 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:06,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 23:34:06,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 87 [2020-10-13 23:34:06,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 23:34:06,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:06,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:06,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:06,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:06,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:06,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:06,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:06,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:34:06,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:06,652 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:06,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:06,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:06,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:06,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:06,722 INFO L134 CoverageAnalysis]: Checked inductivity of 2871 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 2430 trivial. 0 not checked. [2020-10-13 23:34:06,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [691034551] [2020-10-13 23:34:06,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:06,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 23:34:06,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881583988] [2020-10-13 23:34:06,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 23:34:06,723 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:06,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 23:34:06,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:34:06,724 INFO L87 Difference]: Start difference. First operand 312 states and 319 transitions. Second operand 25 states. [2020-10-13 23:34:07,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:07,464 INFO L93 Difference]: Finished difference Result 561 states and 579 transitions. [2020-10-13 23:34:07,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 23:34:07,465 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 307 [2020-10-13 23:34:07,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:07,468 INFO L225 Difference]: With dead ends: 561 [2020-10-13 23:34:07,468 INFO L226 Difference]: Without dead ends: 330 [2020-10-13 23:34:07,469 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:34:07,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-10-13 23:34:07,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 324. [2020-10-13 23:34:07,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2020-10-13 23:34:07,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 331 transitions. [2020-10-13 23:34:07,477 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 331 transitions. Word has length 307 [2020-10-13 23:34:07,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:07,477 INFO L479 AbstractCegarLoop]: Abstraction has 324 states and 331 transitions. [2020-10-13 23:34:07,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 23:34:07,478 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 331 transitions. [2020-10-13 23:34:07,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2020-10-13 23:34:07,480 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:07,480 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 15, 15, 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] [2020-10-13 23:34:07,480 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 23:34:07,480 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:07,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:07,481 INFO L82 PathProgramCache]: Analyzing trace with hash 650056356, now seen corresponding path program 36 times [2020-10-13 23:34:07,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:07,481 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1127872873] [2020-10-13 23:34:07,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:07,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:07,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:07,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:07,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:07,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:12,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:12,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 327 [2020-10-13 23:34:12,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:34:12,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 23:34:12,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:12,514 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:12,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 23:34:12,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:34:12,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 23:34:12,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:12,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:12,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:12,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:12,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:12,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:12,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:12,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:34:12,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:12,746 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:12,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:12,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:12,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:12,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:12,828 INFO L134 CoverageAnalysis]: Checked inductivity of 3129 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 2904 trivial. 0 not checked. [2020-10-13 23:34:12,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1127872873] [2020-10-13 23:34:12,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:12,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 23:34:12,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550594355] [2020-10-13 23:34:12,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 23:34:12,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:12,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 23:34:12,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:34:12,830 INFO L87 Difference]: Start difference. First operand 324 states and 331 transitions. Second operand 19 states. [2020-10-13 23:34:12,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:12,984 INFO L93 Difference]: Finished difference Result 614 states and 628 transitions. [2020-10-13 23:34:12,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 23:34:12,984 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 319 [2020-10-13 23:34:12,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:12,987 INFO L225 Difference]: With dead ends: 614 [2020-10-13 23:34:12,987 INFO L226 Difference]: Without dead ends: 327 [2020-10-13 23:34:12,988 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:34:12,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2020-10-13 23:34:12,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 326. [2020-10-13 23:34:12,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 326 states. [2020-10-13 23:34:12,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 333 transitions. [2020-10-13 23:34:12,995 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 333 transitions. Word has length 319 [2020-10-13 23:34:12,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:12,996 INFO L479 AbstractCegarLoop]: Abstraction has 326 states and 333 transitions. [2020-10-13 23:34:12,996 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 23:34:12,996 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 333 transitions. [2020-10-13 23:34:12,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2020-10-13 23:34:12,998 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:12,998 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 16, 16, 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] [2020-10-13 23:34:12,998 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 23:34:12,998 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:12,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:12,999 INFO L82 PathProgramCache]: Analyzing trace with hash 8575810, now seen corresponding path program 37 times [2020-10-13 23:34:12,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:12,999 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1639804489] [2020-10-13 23:34:12,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:13,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:13,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:13,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:13,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:13,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:18,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:18,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 329 [2020-10-13 23:34:18,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:34:18,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5655 [2020-10-13 23:34:18,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:18,681 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:18,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 23:34:18,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-13 23:34:18,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 23:34:18,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:19,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:19,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:19,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:19,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:19,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:19,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:19,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:34:19,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:19,064 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:19,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:19,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:19,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:19,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:19,103 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 2676 trivial. 0 not checked. [2020-10-13 23:34:19,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1639804489] [2020-10-13 23:34:19,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:19,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 23:34:19,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252490125] [2020-10-13 23:34:19,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 23:34:19,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:19,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 23:34:19,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 23:34:19,104 INFO L87 Difference]: Start difference. First operand 326 states and 333 transitions. Second operand 26 states. [2020-10-13 23:34:19,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:19,782 INFO L93 Difference]: Finished difference Result 585 states and 603 transitions. [2020-10-13 23:34:19,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 23:34:19,783 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 321 [2020-10-13 23:34:19,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:19,785 INFO L225 Difference]: With dead ends: 585 [2020-10-13 23:34:19,785 INFO L226 Difference]: Without dead ends: 344 [2020-10-13 23:34:19,786 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 23:34:19,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2020-10-13 23:34:19,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 338. [2020-10-13 23:34:19,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 338 states. [2020-10-13 23:34:19,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 345 transitions. [2020-10-13 23:34:19,794 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 345 transitions. Word has length 321 [2020-10-13 23:34:19,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:19,795 INFO L479 AbstractCegarLoop]: Abstraction has 338 states and 345 transitions. [2020-10-13 23:34:19,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 23:34:19,795 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 345 transitions. [2020-10-13 23:34:19,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-10-13 23:34:19,797 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:19,797 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 16, 16, 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] [2020-10-13 23:34:19,797 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 23:34:19,798 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:19,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:19,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1747633206, now seen corresponding path program 38 times [2020-10-13 23:34:19,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:19,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1917071238] [2020-10-13 23:34:19,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:19,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:19,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:19,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:20,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:20,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking...