/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/sorting_bubblesort_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 23:26:23,955 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 23:26:23,958 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 23:26:23,990 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 23:26:23,990 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 23:26:23,991 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 23:26:23,993 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 23:26:23,995 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 23:26:23,996 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 23:26:23,997 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 23:26:23,998 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 23:26:23,999 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 23:26:23,999 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 23:26:24,000 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 23:26:24,002 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 23:26:24,003 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 23:26:24,003 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 23:26:24,004 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 23:26:24,006 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 23:26:24,008 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 23:26:24,009 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 23:26:24,010 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 23:26:24,011 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 23:26:24,012 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 23:26:24,014 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 23:26:24,015 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 23:26:24,015 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 23:26:24,016 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 23:26:24,016 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 23:26:24,017 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 23:26:24,017 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 23:26:24,018 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 23:26:24,018 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 23:26:24,019 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 23:26:24,020 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 23:26:24,020 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 23:26:24,021 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 23:26:24,021 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 23:26:24,021 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 23:26:24,022 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 23:26:24,023 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 23:26:24,024 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 23:26:24,048 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 23:26:24,048 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 23:26:24,049 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 23:26:24,049 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 23:26:24,050 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 23:26:24,050 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 23:26:24,050 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 23:26:24,050 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 23:26:24,051 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 23:26:24,051 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 23:26:24,051 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 23:26:24,051 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 23:26:24,051 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 23:26:24,051 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 23:26:24,052 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 23:26:24,052 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 23:26:24,052 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 23:26:24,052 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 23:26:24,052 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 23:26:24,053 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 23:26:24,053 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 23:26:24,053 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 23:26:24,053 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 23:26:24,053 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 23:26:24,054 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 23:26:24,054 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 23:26:24,054 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 23:26:24,054 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 23:26:24,054 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 23:26:24,055 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 23:26:24,377 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 23:26:24,395 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 23:26:24,399 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 23:26:24,404 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 23:26:24,405 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 23:26:24,406 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sorting_bubblesort_ground-1.i [2020-10-13 23:26:24,490 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f65a53304/bbceff0cef55478cb222176fd3c78250/FLAGb9f4f8efe [2020-10-13 23:26:25,009 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 23:26:25,010 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/sorting_bubblesort_ground-1.i [2020-10-13 23:26:25,018 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f65a53304/bbceff0cef55478cb222176fd3c78250/FLAGb9f4f8efe [2020-10-13 23:26:25,418 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f65a53304/bbceff0cef55478cb222176fd3c78250 [2020-10-13 23:26:25,428 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 23:26:25,430 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 23:26:25,433 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 23:26:25,433 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 23:26:25,437 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 23:26:25,438 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:26:25" (1/1) ... [2020-10-13 23:26:25,441 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62030c09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:26:25, skipping insertion in model container [2020-10-13 23:26:25,442 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:26:25" (1/1) ... [2020-10-13 23:26:25,450 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 23:26:25,472 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 23:26:25,657 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:26:25,662 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 23:26:25,688 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:26:25,705 INFO L208 MainTranslator]: Completed translation [2020-10-13 23:26:25,705 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:26:25 WrapperNode [2020-10-13 23:26:25,706 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 23:26:25,706 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 23:26:25,707 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 23:26:25,707 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 23:26:25,812 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:26:25" (1/1) ... [2020-10-13 23:26:25,812 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:26:25" (1/1) ... [2020-10-13 23:26:25,820 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:26:25" (1/1) ... [2020-10-13 23:26:25,820 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:26:25" (1/1) ... [2020-10-13 23:26:25,828 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:26:25" (1/1) ... [2020-10-13 23:26:25,835 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:26:25" (1/1) ... [2020-10-13 23:26:25,837 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:26:25" (1/1) ... [2020-10-13 23:26:25,839 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 23:26:25,840 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 23:26:25,840 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 23:26:25,840 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 23:26:25,841 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:26:25" (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 23:26:25,906 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 23:26:25,907 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 23:26:25,908 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 23:26:25,908 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 23:26:25,908 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 23:26:25,910 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 23:26:25,910 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 23:26:25,911 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 23:26:25,911 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 23:26:25,911 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 23:26:25,911 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 23:26:25,911 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 23:26:25,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 23:26:25,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 23:26:26,216 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 23:26:26,216 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-13 23:26:26,222 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:26:26 BoogieIcfgContainer [2020-10-13 23:26:26,222 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 23:26:26,224 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 23:26:26,224 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 23:26:26,228 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 23:26:26,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:26:25" (1/3) ... [2020-10-13 23:26:26,229 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@806b4de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:26:26, skipping insertion in model container [2020-10-13 23:26:26,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:26:25" (2/3) ... [2020-10-13 23:26:26,230 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@806b4de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:26:26, skipping insertion in model container [2020-10-13 23:26:26,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:26:26" (3/3) ... [2020-10-13 23:26:26,232 INFO L109 eAbstractionObserver]: Analyzing ICFG sorting_bubblesort_ground-1.i [2020-10-13 23:26:26,246 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 23:26:26,255 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 23:26:26,271 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 23:26:26,309 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 23:26:26,310 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 23:26:26,310 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 23:26:26,310 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 23:26:26,311 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 23:26:26,311 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 23:26:26,311 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 23:26:26,311 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 23:26:26,333 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-10-13 23:26:26,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-13 23:26:26,341 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:26:26,342 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:26:26,343 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:26:26,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:26:26,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1296691801, now seen corresponding path program 1 times [2020-10-13 23:26:26,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:26:26,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2140243787] [2020-10-13 23:26:26,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:26:26,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:26,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:26,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:26,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:26,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 23:26:26,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:26:26,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 161 [2020-10-13 23:26:26,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:26,632 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:26,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:26:26,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 23:26:26,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:26:26,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-13 23:26:26,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:26:26,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:26,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:26,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:26,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:26:26,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:26:26,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 23:26:26,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:26,729 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:26,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:26:26,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:26:26,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:26:26,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:26:26,739 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 23:26:26,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2140243787] [2020-10-13 23:26:26,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:26:26,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 23:26:26,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800378982] [2020-10-13 23:26:26,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 23:26:26,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:26:26,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 23:26:26,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:26:26,771 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 3 states. [2020-10-13 23:26:26,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:26:26,877 INFO L93 Difference]: Finished difference Result 54 states and 75 transitions. [2020-10-13 23:26:26,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 23:26:26,879 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-10-13 23:26:26,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:26:26,889 INFO L225 Difference]: With dead ends: 54 [2020-10-13 23:26:26,889 INFO L226 Difference]: Without dead ends: 26 [2020-10-13 23:26:26,893 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 23:26:26,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-13 23:26:26,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-13 23:26:26,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-13 23:26:26,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2020-10-13 23:26:26,934 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 16 [2020-10-13 23:26:26,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:26:26,934 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2020-10-13 23:26:26,934 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 23:26:26,935 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2020-10-13 23:26:26,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-13 23:26:26,936 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:26:26,936 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:26:26,937 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 23:26:26,937 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:26:26,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:26:26,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1547542812, now seen corresponding path program 1 times [2020-10-13 23:26:26,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:26:26,938 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2016042277] [2020-10-13 23:26:26,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:26:26,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:26,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:26,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:27,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:27,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 23:26:27,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:26:27,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 210 [2020-10-13 23:26:27,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:27,166 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:27,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:26:27,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:26:27,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:26:27,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:26:27,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:26:27,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:27,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:27,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:27,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:26:27,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:26:27,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:26:27,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:27,206 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:27,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:26:27,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:26:27,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:26:27,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:26:27,211 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 23:26:27,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2016042277] [2020-10-13 23:26:27,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:26:27,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 23:26:27,213 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036300581] [2020-10-13 23:26:27,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 23:26:27,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:26:27,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 23:26:27,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:26:27,216 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 4 states. [2020-10-13 23:26:27,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:26:27,296 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2020-10-13 23:26:27,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 23:26:27,297 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-13 23:26:27,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:26:27,298 INFO L225 Difference]: With dead ends: 46 [2020-10-13 23:26:27,299 INFO L226 Difference]: Without dead ends: 28 [2020-10-13 23:26:27,300 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 23:26:27,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-13 23:26:27,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-10-13 23:26:27,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-13 23:26:27,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2020-10-13 23:26:27,308 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 16 [2020-10-13 23:26:27,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:26:27,309 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2020-10-13 23:26:27,309 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 23:26:27,309 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2020-10-13 23:26:27,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-13 23:26:27,310 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:26:27,310 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:26:27,311 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 23:26:27,311 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:26:27,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:26:27,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1387426810, now seen corresponding path program 1 times [2020-10-13 23:26:27,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:26:27,312 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1656051817] [2020-10-13 23:26:27,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:26:27,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:27,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:27,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:27,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:27,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 23:26:27,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:26:27,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 185 [2020-10-13 23:26:27,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:27,511 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:27,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:26:27,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 23:26:27,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:26:27,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:26:27,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:26:27,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:27,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:27,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:27,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:26:27,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:26:27,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:26:27,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:27,540 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:27,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:26:27,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:26:27,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:26:27,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:26:27,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 23:26:27,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1656051817] [2020-10-13 23:26:27,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:26:27,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 23:26:27,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269666573] [2020-10-13 23:26:27,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 23:26:27,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:26:27,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 23:26:27,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:26:27,548 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 4 states. [2020-10-13 23:26:27,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:26:27,623 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-10-13 23:26:27,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 23:26:27,624 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-13 23:26:27,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:26:27,625 INFO L225 Difference]: With dead ends: 44 [2020-10-13 23:26:27,625 INFO L226 Difference]: Without dead ends: 31 [2020-10-13 23:26:27,626 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 23:26:27,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-13 23:26:27,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-13 23:26:27,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-13 23:26:27,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2020-10-13 23:26:27,633 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 18 [2020-10-13 23:26:27,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:26:27,634 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2020-10-13 23:26:27,634 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 23:26:27,634 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2020-10-13 23:26:27,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 23:26:27,635 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:26:27,635 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:26:27,635 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 23:26:27,636 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:26:27,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:26:27,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1108929549, now seen corresponding path program 1 times [2020-10-13 23:26:27,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:26:27,637 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [984048059] [2020-10-13 23:26:27,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:26:27,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:27,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:27,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:27,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:27,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 23:26:27,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:26:27,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 101 [2020-10-13 23:26:27,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:27,748 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:27,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:26:27,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 23:26:27,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:26:27,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:26:27,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:26:27,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:27,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:27,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:27,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:26:27,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:26:27,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:26:27,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:27,785 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:27,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:26:27,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:26:27,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:26:27,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:26:27,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 23:26:27,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [984048059] [2020-10-13 23:26:27,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:26:27,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 23:26:27,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522782061] [2020-10-13 23:26:27,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 23:26:27,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:26:27,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 23:26:27,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:26:27,799 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand 4 states. [2020-10-13 23:26:27,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:26:27,885 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2020-10-13 23:26:27,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 23:26:27,886 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-13 23:26:27,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:26:27,887 INFO L225 Difference]: With dead ends: 56 [2020-10-13 23:26:27,887 INFO L226 Difference]: Without dead ends: 35 [2020-10-13 23:26:27,888 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 23:26:27,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-13 23:26:27,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-10-13 23:26:27,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-13 23:26:27,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-10-13 23:26:27,895 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 20 [2020-10-13 23:26:27,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:26:27,895 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-10-13 23:26:27,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 23:26:27,896 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-10-13 23:26:27,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-13 23:26:27,896 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:26:27,897 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] [2020-10-13 23:26:27,897 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 23:26:27,897 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:26:27,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:26:27,898 INFO L82 PathProgramCache]: Analyzing trace with hash -2055572838, now seen corresponding path program 1 times [2020-10-13 23:26:27,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:26:27,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [952225310] [2020-10-13 23:26:27,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:26:27,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:27,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:27,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:28,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:28,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:28,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 23:26:28,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:26:28,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 527 [2020-10-13 23:26:28,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:28,438 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:28,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 23:26:28,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 23:26:28,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 23:26:28,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:26:28,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:26:28,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:28,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:28,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:28,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:26:28,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:26:28,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:26:28,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:28,475 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:28,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:26:28,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:26:28,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:26:28,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:26:28,478 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 23:26:28,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [952225310] [2020-10-13 23:26:28,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:26:28,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 23:26:28,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088401375] [2020-10-13 23:26:28,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 23:26:28,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:26:28,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 23:26:28,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:26:28,481 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 5 states. [2020-10-13 23:26:28,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:26:28,554 INFO L93 Difference]: Finished difference Result 63 states and 81 transitions. [2020-10-13 23:26:28,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 23:26:28,555 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-13 23:26:28,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:26:28,556 INFO L225 Difference]: With dead ends: 63 [2020-10-13 23:26:28,556 INFO L226 Difference]: Without dead ends: 41 [2020-10-13 23:26:28,557 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 23:26:28,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-13 23:26:28,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2020-10-13 23:26:28,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-13 23:26:28,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2020-10-13 23:26:28,563 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 23 [2020-10-13 23:26:28,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:26:28,564 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2020-10-13 23:26:28,564 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 23:26:28,564 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2020-10-13 23:26:28,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-13 23:26:28,565 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:26:28,565 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:26:28,565 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 23:26:28,565 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:26:28,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:26:28,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1214036755, now seen corresponding path program 2 times [2020-10-13 23:26:28,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:26:28,566 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [577967575] [2020-10-13 23:26:28,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:26:28,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:28,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:28,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:28,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:29,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:29,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 23:26:29,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:26:29,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 706 [2020-10-13 23:26:29,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:29,282 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:29,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:26:29,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 23:26:29,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 23:26:29,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:26:29,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:26:29,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:29,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:29,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:29,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:26:29,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:26:29,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:26:29,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:29,320 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:29,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:26:29,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:26:29,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:26:29,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:26:29,324 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 23:26:29,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [577967575] [2020-10-13 23:26:29,325 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:26:29,325 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 23:26:29,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121476692] [2020-10-13 23:26:29,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 23:26:29,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:26:29,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 23:26:29,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:26:29,326 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand 6 states. [2020-10-13 23:26:29,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:26:29,412 INFO L93 Difference]: Finished difference Result 74 states and 95 transitions. [2020-10-13 23:26:29,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 23:26:29,412 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-10-13 23:26:29,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:26:29,413 INFO L225 Difference]: With dead ends: 74 [2020-10-13 23:26:29,413 INFO L226 Difference]: Without dead ends: 47 [2020-10-13 23:26:29,414 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 23:26:29,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-13 23:26:29,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2020-10-13 23:26:29,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-13 23:26:29,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2020-10-13 23:26:29,422 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 26 [2020-10-13 23:26:29,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:26:29,422 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2020-10-13 23:26:29,422 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 23:26:29,423 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2020-10-13 23:26:29,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-13 23:26:29,424 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:26:29,424 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:26:29,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 23:26:29,425 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:26:29,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:26:29,425 INFO L82 PathProgramCache]: Analyzing trace with hash -736694854, now seen corresponding path program 3 times [2020-10-13 23:26:29,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:26:29,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [859365572] [2020-10-13 23:26:29,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:26:29,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:29,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:29,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:29,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:30,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:30,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 23:26:30,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:26:30,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 879 [2020-10-13 23:26:30,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:30,314 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:30,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 23:26:30,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:26:30,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 23:26:30,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:26:30,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:26:30,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:30,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:30,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:30,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:26:30,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:26:30,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:26:30,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:30,344 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:30,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:26:30,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:26:30,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:26:30,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:26:30,348 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-13 23:26:30,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [859365572] [2020-10-13 23:26:30,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:26:30,349 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 23:26:30,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536446445] [2020-10-13 23:26:30,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 23:26:30,350 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:26:30,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 23:26:30,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:26:30,351 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand 5 states. [2020-10-13 23:26:30,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:26:30,420 INFO L93 Difference]: Finished difference Result 80 states and 100 transitions. [2020-10-13 23:26:30,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 23:26:30,421 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2020-10-13 23:26:30,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:26:30,422 INFO L225 Difference]: With dead ends: 80 [2020-10-13 23:26:30,422 INFO L226 Difference]: Without dead ends: 46 [2020-10-13 23:26:30,423 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 23:26:30,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-13 23:26:30,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-10-13 23:26:30,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-13 23:26:30,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 55 transitions. [2020-10-13 23:26:30,429 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 55 transitions. Word has length 29 [2020-10-13 23:26:30,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:26:30,430 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 55 transitions. [2020-10-13 23:26:30,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 23:26:30,430 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 55 transitions. [2020-10-13 23:26:30,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-13 23:26:30,431 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:26:30,431 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:26:30,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 23:26:30,432 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:26:30,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:26:30,432 INFO L82 PathProgramCache]: Analyzing trace with hash -531519528, now seen corresponding path program 4 times [2020-10-13 23:26:30,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:26:30,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1063703264] [2020-10-13 23:26:30,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:26:30,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:30,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:30,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:30,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:31,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:31,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-13 23:26:31,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:26:31,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1518 [2020-10-13 23:26:31,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:31,964 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:31,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:26:31,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-13 23:26:31,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 23:26:31,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 23:26:32,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:26:32,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:32,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:32,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:32,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:26:32,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:26:32,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:26:32,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:32,034 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:32,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:26:32,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:26:32,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:26:32,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:26:32,046 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 23:26:32,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1063703264] [2020-10-13 23:26:32,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:26:32,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 23:26:32,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080420364] [2020-10-13 23:26:32,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 23:26:32,049 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:26:32,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 23:26:32,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:26:32,050 INFO L87 Difference]: Start difference. First operand 45 states and 55 transitions. Second operand 7 states. [2020-10-13 23:26:32,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:26:32,165 INFO L93 Difference]: Finished difference Result 88 states and 113 transitions. [2020-10-13 23:26:32,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 23:26:32,165 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-10-13 23:26:32,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:26:32,166 INFO L225 Difference]: With dead ends: 88 [2020-10-13 23:26:32,166 INFO L226 Difference]: Without dead ends: 55 [2020-10-13 23:26:32,168 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 23:26:32,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-13 23:26:32,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2020-10-13 23:26:32,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-13 23:26:32,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2020-10-13 23:26:32,179 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 31 [2020-10-13 23:26:32,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:26:32,180 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2020-10-13 23:26:32,180 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 23:26:32,180 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2020-10-13 23:26:32,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-13 23:26:32,182 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:26:32,182 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:26:32,183 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 23:26:32,183 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:26:32,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:26:32,183 INFO L82 PathProgramCache]: Analyzing trace with hash -241164561, now seen corresponding path program 5 times [2020-10-13 23:26:32,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:26:32,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [976205664] [2020-10-13 23:26:32,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:26:32,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:32,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:32,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:32,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:33,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:33,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 23:26:33,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:26:33,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1685 [2020-10-13 23:26:33,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:33,881 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:33,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:26:33,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:26:33,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:26:33,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:26:33,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:26:33,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:33,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:33,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:33,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:26:33,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:26:33,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:26:33,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:33,922 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:33,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:26:33,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:26:33,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:26:33,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:26:33,926 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-10-13 23:26:33,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [976205664] [2020-10-13 23:26:33,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:26:33,927 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 23:26:33,927 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873216587] [2020-10-13 23:26:33,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 23:26:33,928 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:26:33,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 23:26:33,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:26:33,929 INFO L87 Difference]: Start difference. First operand 51 states and 63 transitions. Second operand 6 states. [2020-10-13 23:26:34,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:26:34,000 INFO L93 Difference]: Finished difference Result 94 states and 118 transitions. [2020-10-13 23:26:34,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 23:26:34,001 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 34 [2020-10-13 23:26:34,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:26:34,002 INFO L225 Difference]: With dead ends: 94 [2020-10-13 23:26:34,002 INFO L226 Difference]: Without dead ends: 54 [2020-10-13 23:26:34,003 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 23:26:34,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-13 23:26:34,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-10-13 23:26:34,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-13 23:26:34,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 65 transitions. [2020-10-13 23:26:34,010 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 65 transitions. Word has length 34 [2020-10-13 23:26:34,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:26:34,011 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 65 transitions. [2020-10-13 23:26:34,011 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 23:26:34,011 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 65 transitions. [2020-10-13 23:26:34,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-13 23:26:34,012 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:26:34,012 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:26:34,012 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 23:26:34,013 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:26:34,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:26:34,013 INFO L82 PathProgramCache]: Analyzing trace with hash 305858449, now seen corresponding path program 6 times [2020-10-13 23:26:34,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:26:34,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2070734006] [2020-10-13 23:26:34,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:26:34,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:34,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:34,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:34,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:36,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:36,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-13 23:26:36,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:26:36,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2201 [2020-10-13 23:26:36,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:36,226 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:36,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 23:26:36,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:26:36,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 23:26:36,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:26:36,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:26:36,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:36,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:36,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:36,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:26:36,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:26:36,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:26:36,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:36,282 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:36,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:26:36,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:26:36,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:26:36,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:26:36,286 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 23:26:36,287 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2070734006] [2020-10-13 23:26:36,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:26:36,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 23:26:36,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029349733] [2020-10-13 23:26:36,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 23:26:36,288 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:26:36,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 23:26:36,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:26:36,289 INFO L87 Difference]: Start difference. First operand 53 states and 65 transitions. Second operand 8 states. [2020-10-13 23:26:36,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:26:36,389 INFO L93 Difference]: Finished difference Result 102 states and 131 transitions. [2020-10-13 23:26:36,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 23:26:36,390 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2020-10-13 23:26:36,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:26:36,391 INFO L225 Difference]: With dead ends: 102 [2020-10-13 23:26:36,391 INFO L226 Difference]: Without dead ends: 63 [2020-10-13 23:26:36,392 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 23:26:36,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-13 23:26:36,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2020-10-13 23:26:36,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-13 23:26:36,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 73 transitions. [2020-10-13 23:26:36,405 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 73 transitions. Word has length 36 [2020-10-13 23:26:36,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:26:36,407 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 73 transitions. [2020-10-13 23:26:36,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 23:26:36,407 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 73 transitions. [2020-10-13 23:26:36,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 23:26:36,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:26:36,410 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:26:36,410 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 23:26:36,410 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:26:36,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:26:36,411 INFO L82 PathProgramCache]: Analyzing trace with hash 916093078, now seen corresponding path program 7 times [2020-10-13 23:26:36,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:26:36,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [303102771] [2020-10-13 23:26:36,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:26:36,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:36,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:36,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:36,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:40,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:40,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 23:26:40,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:26:40,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3673 [2020-10-13 23:26:40,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:40,099 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:40,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 23:26:40,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:26:40,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 23:26:40,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:26:40,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:26:40,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:40,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:40,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:40,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:26:40,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:26:40,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:26:40,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:40,186 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:40,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:26:40,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:26:40,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:26:40,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:26:40,190 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 23:26:40,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [303102771] [2020-10-13 23:26:40,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:26:40,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 23:26:40,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525449178] [2020-10-13 23:26:40,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 23:26:40,193 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:26:40,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 23:26:40,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:26:40,194 INFO L87 Difference]: Start difference. First operand 59 states and 73 transitions. Second operand 9 states. [2020-10-13 23:26:40,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:26:40,306 INFO L93 Difference]: Finished difference Result 114 states and 147 transitions. [2020-10-13 23:26:40,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 23:26:40,307 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 39 [2020-10-13 23:26:40,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:26:40,308 INFO L225 Difference]: With dead ends: 114 [2020-10-13 23:26:40,308 INFO L226 Difference]: Without dead ends: 69 [2020-10-13 23:26:40,309 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 23:26:40,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-13 23:26:40,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 65. [2020-10-13 23:26:40,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-13 23:26:40,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 81 transitions. [2020-10-13 23:26:40,320 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 81 transitions. Word has length 39 [2020-10-13 23:26:40,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:26:40,320 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 81 transitions. [2020-10-13 23:26:40,321 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 23:26:40,321 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 81 transitions. [2020-10-13 23:26:40,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 23:26:40,324 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:26:40,325 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:26:40,325 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 23:26:40,325 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:26:40,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:26:40,326 INFO L82 PathProgramCache]: Analyzing trace with hash -180638351, now seen corresponding path program 8 times [2020-10-13 23:26:40,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:26:40,326 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1964996978] [2020-10-13 23:26:40,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:26:40,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:40,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:40,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:40,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:43,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:43,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-13 23:26:43,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:26:43,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3484 [2020-10-13 23:26:43,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:43,821 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:43,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:26:43,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:26:43,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 23:26:43,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:26:43,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:26:43,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:43,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:43,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:43,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:26:43,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:26:43,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:26:43,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:43,868 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:43,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:26:43,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:26:43,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:26:43,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:26:43,872 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-10-13 23:26:43,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1964996978] [2020-10-13 23:26:43,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:26:43,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 23:26:43,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194229360] [2020-10-13 23:26:43,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 23:26:43,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:26:43,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 23:26:43,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:26:43,874 INFO L87 Difference]: Start difference. First operand 65 states and 81 transitions. Second operand 7 states. [2020-10-13 23:26:43,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:26:43,954 INFO L93 Difference]: Finished difference Result 120 states and 152 transitions. [2020-10-13 23:26:43,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 23:26:43,955 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-10-13 23:26:43,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:26:43,955 INFO L225 Difference]: With dead ends: 120 [2020-10-13 23:26:43,956 INFO L226 Difference]: Without dead ends: 68 [2020-10-13 23:26:43,956 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 23:26:43,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-13 23:26:43,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-10-13 23:26:43,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-13 23:26:43,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 83 transitions. [2020-10-13 23:26:43,963 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 83 transitions. Word has length 42 [2020-10-13 23:26:43,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:26:43,963 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 83 transitions. [2020-10-13 23:26:43,963 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 23:26:43,963 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 83 transitions. [2020-10-13 23:26:43,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-13 23:26:43,964 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:26:43,964 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:26:43,964 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 23:26:43,965 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:26:43,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:26:43,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1279470573, now seen corresponding path program 9 times [2020-10-13 23:26:43,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:26:43,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1968345257] [2020-10-13 23:26:43,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:26:43,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:43,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:43,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:44,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:47,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:47,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 23:26:47,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:26:47,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3469 [2020-10-13 23:26:47,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:47,445 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:47,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:26:47,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 23:26:47,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 23:26:47,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:26:47,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:26:47,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:47,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:47,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:47,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:26:47,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:26:47,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:26:47,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:47,528 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:47,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:26:47,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:26:47,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:26:47,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:26:47,532 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-13 23:26:47,533 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1968345257] [2020-10-13 23:26:47,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:26:47,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:26:47,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674912186] [2020-10-13 23:26:47,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:26:47,534 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:26:47,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:26:47,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:26:47,535 INFO L87 Difference]: Start difference. First operand 67 states and 83 transitions. Second operand 10 states. [2020-10-13 23:26:47,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:26:47,653 INFO L93 Difference]: Finished difference Result 128 states and 165 transitions. [2020-10-13 23:26:47,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 23:26:47,654 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 44 [2020-10-13 23:26:47,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:26:47,655 INFO L225 Difference]: With dead ends: 128 [2020-10-13 23:26:47,655 INFO L226 Difference]: Without dead ends: 77 [2020-10-13 23:26:47,656 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 23:26:47,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-13 23:26:47,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 73. [2020-10-13 23:26:47,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-13 23:26:47,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 91 transitions. [2020-10-13 23:26:47,666 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 91 transitions. Word has length 44 [2020-10-13 23:26:47,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:26:47,668 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 91 transitions. [2020-10-13 23:26:47,668 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:26:47,669 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 91 transitions. [2020-10-13 23:26:47,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-13 23:26:47,671 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:26:47,671 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:26:47,671 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 23:26:47,671 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:26:47,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:26:47,672 INFO L82 PathProgramCache]: Analyzing trace with hash -160414508, now seen corresponding path program 10 times [2020-10-13 23:26:47,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:26:47,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [855778743] [2020-10-13 23:26:47,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:26:47,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:47,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:47,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:48,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:51,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:51,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 23:26:51,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:26:51,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3915 [2020-10-13 23:26:51,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:51,597 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:51,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 23:26:51,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:26:51,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 23:26:51,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:26:51,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:26:51,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:51,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:51,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:51,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:26:51,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:26:51,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:26:51,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:51,652 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:51,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:26:51,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:26:51,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:26:51,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:26:51,657 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-10-13 23:26:51,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [855778743] [2020-10-13 23:26:51,658 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:26:51,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 23:26:51,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852382707] [2020-10-13 23:26:51,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 23:26:51,659 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:26:51,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 23:26:51,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:26:51,660 INFO L87 Difference]: Start difference. First operand 73 states and 91 transitions. Second operand 8 states. [2020-10-13 23:26:51,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:26:51,727 INFO L93 Difference]: Finished difference Result 134 states and 170 transitions. [2020-10-13 23:26:51,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 23:26:51,728 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 47 [2020-10-13 23:26:51,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:26:51,729 INFO L225 Difference]: With dead ends: 134 [2020-10-13 23:26:51,729 INFO L226 Difference]: Without dead ends: 76 [2020-10-13 23:26:51,731 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 23:26:51,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-13 23:26:51,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-10-13 23:26:51,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-13 23:26:51,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 93 transitions. [2020-10-13 23:26:51,743 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 93 transitions. Word has length 47 [2020-10-13 23:26:51,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:26:51,743 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 93 transitions. [2020-10-13 23:26:51,743 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 23:26:51,743 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 93 transitions. [2020-10-13 23:26:51,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-13 23:26:51,744 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:26:51,744 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:26:51,744 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 23:26:51,744 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:26:51,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:26:51,745 INFO L82 PathProgramCache]: Analyzing trace with hash 220722034, now seen corresponding path program 11 times [2020-10-13 23:26:51,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:26:51,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2128201453] [2020-10-13 23:26:51,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:26:51,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:51,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:51,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:52,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:55,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:55,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-13 23:26:55,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:26:55,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3784 [2020-10-13 23:26:55,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:55,543 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:55,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 23:26:55,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 23:26:55,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 23:26:55,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:26:55,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:26:55,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:55,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:55,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:55,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:26:55,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:26:55,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:26:55,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:55,711 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:55,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:26:55,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:26:55,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:26:55,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:26:55,719 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2020-10-13 23:26:55,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2128201453] [2020-10-13 23:26:55,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:26:55,720 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 23:26:55,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977109333] [2020-10-13 23:26:55,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 23:26:55,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:26:55,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 23:26:55,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:26:55,721 INFO L87 Difference]: Start difference. First operand 75 states and 93 transitions. Second operand 11 states. [2020-10-13 23:26:56,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:26:56,116 INFO L93 Difference]: Finished difference Result 167 states and 213 transitions. [2020-10-13 23:26:56,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 23:26:56,116 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2020-10-13 23:26:56,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:26:56,120 INFO L225 Difference]: With dead ends: 167 [2020-10-13 23:26:56,121 INFO L226 Difference]: Without dead ends: 110 [2020-10-13 23:26:56,122 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:26:56,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-13 23:26:56,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 102. [2020-10-13 23:26:56,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-13 23:26:56,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 127 transitions. [2020-10-13 23:26:56,135 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 127 transitions. Word has length 49 [2020-10-13 23:26:56,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:26:56,135 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 127 transitions. [2020-10-13 23:26:56,136 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 23:26:56,136 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 127 transitions. [2020-10-13 23:26:56,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 23:26:56,136 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:26:56,137 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:26:56,137 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 23:26:56,137 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:26:56,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:26:56,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1358339511, now seen corresponding path program 1 times [2020-10-13 23:26:56,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:26:56,138 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1907540946] [2020-10-13 23:26:56,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:26:56,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:56,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:56,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:56,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:56,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:58,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:01,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:01,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 23:27:01,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:27:01,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 23:27:01,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:01,152 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:01,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:27:01,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-13 23:27:01,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 23:27:01,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:27:01,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:27:01,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:01,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:01,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:01,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:27:01,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:27:01,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:27:01,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:01,206 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:01,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:27:01,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:27:01,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:27:01,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:27:01,209 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2020-10-13 23:27:01,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1907540946] [2020-10-13 23:27:01,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:27:01,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 23:27:01,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427594864] [2020-10-13 23:27:01,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 23:27:01,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:27:01,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 23:27:01,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:27:01,212 INFO L87 Difference]: Start difference. First operand 102 states and 127 transitions. Second operand 6 states. [2020-10-13 23:27:01,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:27:01,292 INFO L93 Difference]: Finished difference Result 120 states and 148 transitions. [2020-10-13 23:27:01,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 23:27:01,293 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-10-13 23:27:01,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:27:01,296 INFO L225 Difference]: With dead ends: 120 [2020-10-13 23:27:01,296 INFO L226 Difference]: Without dead ends: 106 [2020-10-13 23:27:01,297 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:27:01,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-13 23:27:01,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 103. [2020-10-13 23:27:01,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-13 23:27:01,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 127 transitions. [2020-10-13 23:27:01,304 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 127 transitions. Word has length 52 [2020-10-13 23:27:01,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:27:01,305 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 127 transitions. [2020-10-13 23:27:01,305 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 23:27:01,305 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 127 transitions. [2020-10-13 23:27:01,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 23:27:01,305 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:27:01,306 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:27:01,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 23:27:01,306 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:27:01,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:27:01,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1205283803, now seen corresponding path program 1 times [2020-10-13 23:27:01,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:27:01,307 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [516161904] [2020-10-13 23:27:01,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:27:01,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:01,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:01,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:01,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:01,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:06,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:06,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-13 23:27:06,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:27:06,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 23:27:06,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:06,320 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:06,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 23:27:06,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 23:27:06,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 23:27:06,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:27:06,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:27:06,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:06,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:06,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:06,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:27:06,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:27:06,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:27:06,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:06,406 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:06,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:27:06,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:27:06,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:27:06,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:27:06,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-13 23:27:06,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:06,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:06,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:06,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:27:06,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:27:06,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:27:06,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:06,412 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:06,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:27:06,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:27:06,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:27:06,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:27:06,417 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 3 proven. 70 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-13 23:27:06,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [516161904] [2020-10-13 23:27:06,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:27:06,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 23:27:06,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452751479] [2020-10-13 23:27:06,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 23:27:06,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:27:06,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 23:27:06,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:27:06,420 INFO L87 Difference]: Start difference. First operand 103 states and 127 transitions. Second operand 11 states. [2020-10-13 23:27:06,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:27:06,539 INFO L93 Difference]: Finished difference Result 203 states and 259 transitions. [2020-10-13 23:27:06,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 23:27:06,540 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 57 [2020-10-13 23:27:06,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:27:06,541 INFO L225 Difference]: With dead ends: 203 [2020-10-13 23:27:06,541 INFO L226 Difference]: Without dead ends: 118 [2020-10-13 23:27:06,542 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:27:06,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-13 23:27:06,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 112. [2020-10-13 23:27:06,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-13 23:27:06,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 139 transitions. [2020-10-13 23:27:06,550 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 139 transitions. Word has length 57 [2020-10-13 23:27:06,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:27:06,550 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 139 transitions. [2020-10-13 23:27:06,550 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 23:27:06,551 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 139 transitions. [2020-10-13 23:27:06,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 23:27:06,551 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:27:06,551 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:27:06,552 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 23:27:06,552 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:27:06,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:27:06,552 INFO L82 PathProgramCache]: Analyzing trace with hash -966098232, now seen corresponding path program 2 times [2020-10-13 23:27:06,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:27:06,553 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1365106388] [2020-10-13 23:27:06,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:27:06,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:06,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:06,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:07,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:07,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:11,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:11,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 23:27:11,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:27:11,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 23:27:11,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:11,561 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:11,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 23:27:11,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:27:11,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 23:27:11,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:27:11,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:27:11,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:11,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:11,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:11,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:27:11,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:27:11,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:27:11,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:11,612 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:11,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:27:11,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:27:11,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:27:11,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:27:11,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-13 23:27:11,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:11,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:11,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:11,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:27:11,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:27:11,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:27:11,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:11,617 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:11,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:27:11,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:27:11,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:27:11,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:27:11,621 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2020-10-13 23:27:11,621 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1365106388] [2020-10-13 23:27:11,621 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:27:11,621 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 23:27:11,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490029438] [2020-10-13 23:27:11,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 23:27:11,622 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:27:11,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 23:27:11,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:27:11,623 INFO L87 Difference]: Start difference. First operand 112 states and 139 transitions. Second operand 9 states. [2020-10-13 23:27:11,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:27:11,711 INFO L93 Difference]: Finished difference Result 210 states and 264 transitions. [2020-10-13 23:27:11,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 23:27:11,711 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 60 [2020-10-13 23:27:11,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:27:11,712 INFO L225 Difference]: With dead ends: 210 [2020-10-13 23:27:11,713 INFO L226 Difference]: Without dead ends: 115 [2020-10-13 23:27:11,714 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:27:11,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-13 23:27:11,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2020-10-13 23:27:11,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-13 23:27:11,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 141 transitions. [2020-10-13 23:27:11,720 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 141 transitions. Word has length 60 [2020-10-13 23:27:11,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:27:11,721 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 141 transitions. [2020-10-13 23:27:11,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 23:27:11,721 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 141 transitions. [2020-10-13 23:27:11,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-13 23:27:11,722 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:27:11,722 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:27:11,722 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 23:27:11,722 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:27:11,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:27:11,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1224735510, now seen corresponding path program 3 times [2020-10-13 23:27:11,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:27:11,723 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [577161592] [2020-10-13 23:27:11,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:27:11,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:11,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:11,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:12,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:12,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:16,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:16,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 23:27:16,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:27:16,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:27:16,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:16,734 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:16,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:27:16,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-13 23:27:16,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 23:27:16,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:27:16,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:27:16,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:16,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:16,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:16,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:27:16,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:27:16,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:27:16,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:16,835 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:16,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:27:16,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:27:16,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:27:16,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:27:16,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-13 23:27:16,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:16,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:16,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:16,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:27:16,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:27:16,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:27:16,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:16,842 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:16,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:27:16,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:27:16,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:27:16,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:27:16,851 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 3 proven. 92 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-10-13 23:27:16,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [577161592] [2020-10-13 23:27:16,851 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:27:16,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:27:16,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413971746] [2020-10-13 23:27:16,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:27:16,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:27:16,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:27:16,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:27:16,855 INFO L87 Difference]: Start difference. First operand 114 states and 141 transitions. Second operand 12 states. [2020-10-13 23:27:17,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:27:17,032 INFO L93 Difference]: Finished difference Result 223 states and 285 transitions. [2020-10-13 23:27:17,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 23:27:17,033 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 62 [2020-10-13 23:27:17,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:27:17,035 INFO L225 Difference]: With dead ends: 223 [2020-10-13 23:27:17,036 INFO L226 Difference]: Without dead ends: 129 [2020-10-13 23:27:17,037 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:27:17,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-13 23:27:17,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 123. [2020-10-13 23:27:17,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-13 23:27:17,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 153 transitions. [2020-10-13 23:27:17,046 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 153 transitions. Word has length 62 [2020-10-13 23:27:17,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:27:17,047 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 153 transitions. [2020-10-13 23:27:17,047 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:27:17,047 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 153 transitions. [2020-10-13 23:27:17,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 23:27:17,056 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:27:17,056 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:27:17,056 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 23:27:17,057 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:27:17,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:27:17,057 INFO L82 PathProgramCache]: Analyzing trace with hash -631316509, now seen corresponding path program 4 times [2020-10-13 23:27:17,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:27:17,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1506678785] [2020-10-13 23:27:17,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:27:17,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:17,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:17,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:18,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:18,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:22,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:22,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 23:27:22,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:27:22,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 23:27:22,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:22,083 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:22,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 23:27:22,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-13 23:27:22,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 23:27:22,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:27:22,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:27:22,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:22,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:22,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:22,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:27:22,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:27:22,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:27:22,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:22,196 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:22,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:27:22,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:27:22,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:27:22,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:27:22,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-13 23:27:22,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:22,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:22,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:22,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:27:22,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:27:22,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:27:22,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:22,202 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:22,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:27:22,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:27:22,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:27:22,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:27:22,206 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 3 proven. 117 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-10-13 23:27:22,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1506678785] [2020-10-13 23:27:22,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:27:22,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 23:27:22,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916130063] [2020-10-13 23:27:22,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 23:27:22,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:27:22,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 23:27:22,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:27:22,209 INFO L87 Difference]: Start difference. First operand 123 states and 153 transitions. Second operand 13 states. [2020-10-13 23:27:22,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:27:22,358 INFO L93 Difference]: Finished difference Result 241 states and 309 transitions. [2020-10-13 23:27:22,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 23:27:22,358 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 65 [2020-10-13 23:27:22,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:27:22,359 INFO L225 Difference]: With dead ends: 241 [2020-10-13 23:27:22,359 INFO L226 Difference]: Without dead ends: 138 [2020-10-13 23:27:22,360 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 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 23:27:22,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-13 23:27:22,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 132. [2020-10-13 23:27:22,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-13 23:27:22,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 165 transitions. [2020-10-13 23:27:22,368 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 165 transitions. Word has length 65 [2020-10-13 23:27:22,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:27:22,368 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 165 transitions. [2020-10-13 23:27:22,368 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 23:27:22,368 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 165 transitions. [2020-10-13 23:27:22,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 23:27:22,369 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:27:22,369 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:27:22,370 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 23:27:22,370 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:27:22,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:27:22,370 INFO L82 PathProgramCache]: Analyzing trace with hash -171248054, now seen corresponding path program 5 times [2020-10-13 23:27:22,370 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:27:22,371 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1178208307] [2020-10-13 23:27:22,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:27:22,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:22,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:22,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:23,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:23,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:27,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:27,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 23:27:27,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:27:27,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 23:27:27,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:27,379 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:27,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:27:27,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:27:27,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 23:27:27,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:27:27,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:27:27,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:27,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:27,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:27,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:27:27,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:27:27,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:27:27,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:27,446 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:27,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:27:27,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:27:27,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:27:27,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:27:27,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-13 23:27:27,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:27,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:27,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:27,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:27:27,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:27:27,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:27:27,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:27,452 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:27,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:27:27,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:27:27,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:27:27,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:27:27,466 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2020-10-13 23:27:27,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1178208307] [2020-10-13 23:27:27,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:27:27,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:27:27,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633100771] [2020-10-13 23:27:27,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:27:27,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:27:27,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:27:27,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:27:27,468 INFO L87 Difference]: Start difference. First operand 132 states and 165 transitions. Second operand 10 states. [2020-10-13 23:27:27,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:27:27,547 INFO L93 Difference]: Finished difference Result 248 states and 314 transitions. [2020-10-13 23:27:27,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 23:27:27,548 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 68 [2020-10-13 23:27:27,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:27:27,549 INFO L225 Difference]: With dead ends: 248 [2020-10-13 23:27:27,549 INFO L226 Difference]: Without dead ends: 135 [2020-10-13 23:27:27,550 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:27:27,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-13 23:27:27,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2020-10-13 23:27:27,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-13 23:27:27,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 167 transitions. [2020-10-13 23:27:27,557 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 167 transitions. Word has length 68 [2020-10-13 23:27:27,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:27:27,557 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 167 transitions. [2020-10-13 23:27:27,558 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:27:27,558 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 167 transitions. [2020-10-13 23:27:27,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 23:27:27,558 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:27:27,559 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:27:27,559 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 23:27:27,559 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:27:27,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:27:27,559 INFO L82 PathProgramCache]: Analyzing trace with hash -220907924, now seen corresponding path program 6 times [2020-10-13 23:27:27,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:27:27,560 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [15435889] [2020-10-13 23:27:27,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:27:27,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:27,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:27,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:28,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:28,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:32,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:32,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-13 23:27:32,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:27:32,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 23:27:32,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:32,578 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:32,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:27:32,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-13 23:27:32,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 23:27:32,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:27:32,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:27:32,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:32,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:32,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:32,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:27:32,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:27:32,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:27:32,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:32,695 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:32,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:27:32,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:27:32,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:27:32,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:27:32,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-13 23:27:32,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:32,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:32,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:32,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:27:32,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:27:32,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:27:32,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:32,699 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:32,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:27:32,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:27:32,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:27:32,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:27:32,704 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 3 proven. 145 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-13 23:27:32,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [15435889] [2020-10-13 23:27:32,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:27:32,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:27:32,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587038430] [2020-10-13 23:27:32,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:27:32,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:27:32,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:27:32,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:27:32,706 INFO L87 Difference]: Start difference. First operand 134 states and 167 transitions. Second operand 14 states. [2020-10-13 23:27:32,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:27:32,869 INFO L93 Difference]: Finished difference Result 261 states and 335 transitions. [2020-10-13 23:27:32,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 23:27:32,869 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 70 [2020-10-13 23:27:32,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:27:32,871 INFO L225 Difference]: With dead ends: 261 [2020-10-13 23:27:32,871 INFO L226 Difference]: Without dead ends: 149 [2020-10-13 23:27:32,872 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:27:32,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-13 23:27:32,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 143. [2020-10-13 23:27:32,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-13 23:27:32,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 179 transitions. [2020-10-13 23:27:32,879 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 179 transitions. Word has length 70 [2020-10-13 23:27:32,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:27:32,879 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 179 transitions. [2020-10-13 23:27:32,879 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:27:32,880 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 179 transitions. [2020-10-13 23:27:32,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-13 23:27:32,880 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:27:32,880 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:27:32,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 23:27:32,881 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:27:32,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:27:32,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1460984031, now seen corresponding path program 7 times [2020-10-13 23:27:32,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:27:32,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1720799211] [2020-10-13 23:27:32,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:27:32,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:32,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:32,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:34,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:34,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:37,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:37,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-13 23:27:37,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:27:37,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 23:27:37,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:37,890 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:37,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 23:27:37,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:27:37,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 23:27:37,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:27:37,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:27:37,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:37,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:37,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:37,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:27:37,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:27:37,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:27:37,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:37,963 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:37,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:27:37,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:27:37,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:27:37,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:27:37,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-13 23:27:37,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:37,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:37,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:37,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:27:37,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:27:37,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:27:37,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:37,968 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:37,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:27:37,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:27:37,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:27:37,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:27:37,972 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 2 proven. 49 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2020-10-13 23:27:37,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1720799211] [2020-10-13 23:27:37,972 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:27:37,972 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 23:27:37,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671748342] [2020-10-13 23:27:37,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 23:27:37,973 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:27:37,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 23:27:37,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:27:37,974 INFO L87 Difference]: Start difference. First operand 143 states and 179 transitions. Second operand 11 states. [2020-10-13 23:27:38,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:27:38,058 INFO L93 Difference]: Finished difference Result 268 states and 340 transitions. [2020-10-13 23:27:38,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 23:27:38,059 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 73 [2020-10-13 23:27:38,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:27:38,060 INFO L225 Difference]: With dead ends: 268 [2020-10-13 23:27:38,061 INFO L226 Difference]: Without dead ends: 146 [2020-10-13 23:27:38,061 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:27:38,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-13 23:27:38,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2020-10-13 23:27:38,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-13 23:27:38,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 181 transitions. [2020-10-13 23:27:38,069 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 181 transitions. Word has length 73 [2020-10-13 23:27:38,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:27:38,069 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 181 transitions. [2020-10-13 23:27:38,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 23:27:38,069 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 181 transitions. [2020-10-13 23:27:38,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-13 23:27:38,070 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:27:38,070 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:27:38,071 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 23:27:38,071 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:27:38,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:27:38,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1303532481, now seen corresponding path program 8 times [2020-10-13 23:27:38,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:27:38,072 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [363930998] [2020-10-13 23:27:38,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:27:38,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:38,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:38,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:39,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:39,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:43,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:43,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-13 23:27:43,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:27:43,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:27:43,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:43,082 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:43,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 23:27:43,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-13 23:27:43,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 23:27:43,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:27:43,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:27:43,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:43,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:43,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:43,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:27:43,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:27:43,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:27:43,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:43,312 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:43,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:27:43,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:27:43,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:27:43,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:27:43,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-13 23:27:43,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:43,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:43,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:43,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:27:43,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:27:43,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:27:43,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:43,317 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:43,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:27:43,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:27:43,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:27:43,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:27:43,332 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 3 proven. 52 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2020-10-13 23:27:43,333 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [363930998] [2020-10-13 23:27:43,333 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:27:43,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 23:27:43,333 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935374204] [2020-10-13 23:27:43,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 23:27:43,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:27:43,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 23:27:43,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:27:43,334 INFO L87 Difference]: Start difference. First operand 145 states and 181 transitions. Second operand 15 states. [2020-10-13 23:27:44,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:27:44,078 INFO L93 Difference]: Finished difference Result 199 states and 250 transitions. [2020-10-13 23:27:44,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 23:27:44,079 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 75 [2020-10-13 23:27:44,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:27:44,080 INFO L225 Difference]: With dead ends: 199 [2020-10-13 23:27:44,081 INFO L226 Difference]: Without dead ends: 197 [2020-10-13 23:27:44,081 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2020-10-13 23:27:44,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-13 23:27:44,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 153. [2020-10-13 23:27:44,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-13 23:27:44,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 190 transitions. [2020-10-13 23:27:44,097 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 190 transitions. Word has length 75 [2020-10-13 23:27:44,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:27:44,097 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 190 transitions. [2020-10-13 23:27:44,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 23:27:44,097 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 190 transitions. [2020-10-13 23:27:44,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-13 23:27:44,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:27:44,099 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 8, 8, 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] [2020-10-13 23:27:44,100 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 23:27:44,101 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:27:44,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:27:44,101 INFO L82 PathProgramCache]: Analyzing trace with hash 264624732, now seen corresponding path program 1 times [2020-10-13 23:27:44,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:27:44,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1527454987] [2020-10-13 23:27:44,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:27:44,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:44,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:44,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:44,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:49,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:49,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 23:27:49,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:27:49,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:27:49,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:49,112 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:49,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:27:49,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 66 [2020-10-13 23:27:49,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 23:27:49,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:27:49,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:27:49,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:49,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:49,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:49,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:27:49,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:27:49,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:27:49,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:49,141 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:49,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:27:49,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:27:49,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:27:49,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:27:49,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-13 23:27:49,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:49,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:49,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:49,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:27:49,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:27:49,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:27:49,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:49,147 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:49,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:27:49,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:27:49,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:27:49,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:27:49,152 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2020-10-13 23:27:49,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1527454987] [2020-10-13 23:27:49,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:27:49,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 23:27:49,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657880417] [2020-10-13 23:27:49,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 23:27:49,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:27:49,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 23:27:49,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:27:49,154 INFO L87 Difference]: Start difference. First operand 153 states and 190 transitions. Second operand 6 states. [2020-10-13 23:27:49,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:27:49,280 INFO L93 Difference]: Finished difference Result 173 states and 213 transitions. [2020-10-13 23:27:49,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 23:27:49,281 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-10-13 23:27:49,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:27:49,282 INFO L225 Difference]: With dead ends: 173 [2020-10-13 23:27:49,282 INFO L226 Difference]: Without dead ends: 160 [2020-10-13 23:27:49,283 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:27:49,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-13 23:27:49,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 153. [2020-10-13 23:27:49,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-13 23:27:49,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 189 transitions. [2020-10-13 23:27:49,301 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 189 transitions. Word has length 78 [2020-10-13 23:27:49,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:27:49,305 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 189 transitions. [2020-10-13 23:27:49,305 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 23:27:49,306 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 189 transitions. [2020-10-13 23:27:49,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-13 23:27:49,306 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:27:49,307 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:27:49,307 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 23:27:49,307 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:27:49,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:27:49,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1390637042, now seen corresponding path program 9 times [2020-10-13 23:27:49,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:27:49,308 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [963905495] [2020-10-13 23:27:49,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:27:49,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:49,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:49,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:51,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:51,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:52,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:54,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:54,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-13 23:27:54,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:27:54,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 23:27:54,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:54,330 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:54,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 23:27:54,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-13 23:27:54,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 23:27:54,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:27:54,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:27:54,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:54,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:54,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:54,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:27:54,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:27:54,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:27:54,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:54,453 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:54,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:27:54,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:27:54,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:27:54,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:27:54,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-13 23:27:54,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:54,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:54,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:54,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:27:54,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:27:54,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:27:54,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:54,457 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:54,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:27:54,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:27:54,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:27:54,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:27:54,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-13 23:27:54,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:54,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:54,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:54,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:27:54,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:27:54,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:27:54,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:54,461 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:54,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:27:54,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:27:54,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:27:54,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:27:54,467 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 5 proven. 176 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2020-10-13 23:27:54,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [963905495] [2020-10-13 23:27:54,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:27:54,468 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 23:27:54,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419405263] [2020-10-13 23:27:54,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 23:27:54,469 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:27:54,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 23:27:54,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:27:54,470 INFO L87 Difference]: Start difference. First operand 153 states and 189 transitions. Second operand 15 states. [2020-10-13 23:27:54,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:27:54,641 INFO L93 Difference]: Finished difference Result 297 states and 377 transitions. [2020-10-13 23:27:54,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 23:27:54,642 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 83 [2020-10-13 23:27:54,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:27:54,644 INFO L225 Difference]: With dead ends: 297 [2020-10-13 23:27:54,644 INFO L226 Difference]: Without dead ends: 168 [2020-10-13 23:27:54,646 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 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 23:27:54,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-13 23:27:54,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 162. [2020-10-13 23:27:54,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-13 23:27:54,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 201 transitions. [2020-10-13 23:27:54,663 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 201 transitions. Word has length 83 [2020-10-13 23:27:54,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:27:54,663 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 201 transitions. [2020-10-13 23:27:54,663 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 23:27:54,663 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 201 transitions. [2020-10-13 23:27:54,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-13 23:27:54,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:27:54,664 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:27:54,666 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 23:27:54,666 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:27:54,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:27:54,667 INFO L82 PathProgramCache]: Analyzing trace with hash -883384031, now seen corresponding path program 10 times [2020-10-13 23:27:54,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:27:54,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [841982217] [2020-10-13 23:27:54,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:27:54,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:54,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:54,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:56,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:56,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:57,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:59,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:59,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-13 23:27:59,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:27:59,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 23:27:59,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:59,690 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:59,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:27:59,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-13 23:27:59,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 23:27:59,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:27:59,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:27:59,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:59,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:59,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:59,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:27:59,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:27:59,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:27:59,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:59,831 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:59,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:27:59,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:27:59,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:27:59,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:27:59,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-10-13 23:27:59,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:59,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:59,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:59,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:27:59,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:27:59,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:27:59,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:59,834 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:59,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:27:59,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:27:59,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:27:59,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:27:59,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-10-13 23:27:59,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:59,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:59,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:59,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:27:59,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:27:59,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:27:59,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:59,837 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:59,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:27:59,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:27:59,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:27:59,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:27:59,842 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 5 proven. 210 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2020-10-13 23:27:59,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [841982217] [2020-10-13 23:27:59,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:27:59,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:27:59,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533359790] [2020-10-13 23:27:59,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:27:59,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:27:59,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:27:59,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:27:59,844 INFO L87 Difference]: Start difference. First operand 162 states and 201 transitions. Second operand 16 states. [2020-10-13 23:28:00,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:28:00,033 INFO L93 Difference]: Finished difference Result 315 states and 401 transitions. [2020-10-13 23:28:00,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 23:28:00,034 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 86 [2020-10-13 23:28:00,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:28:00,036 INFO L225 Difference]: With dead ends: 315 [2020-10-13 23:28:00,036 INFO L226 Difference]: Without dead ends: 177 [2020-10-13 23:28:00,037 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 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 23:28:00,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-13 23:28:00,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 171. [2020-10-13 23:28:00,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-13 23:28:00,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 213 transitions. [2020-10-13 23:28:00,046 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 213 transitions. Word has length 86 [2020-10-13 23:28:00,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:28:00,047 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 213 transitions. [2020-10-13 23:28:00,047 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:28:00,047 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 213 transitions. [2020-10-13 23:28:00,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-13 23:28:00,048 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:28:00,048 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:28:00,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 23:28:00,049 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:28:00,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:28:00,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1726009966, now seen corresponding path program 11 times [2020-10-13 23:28:00,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:28:00,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [316884864] [2020-10-13 23:28:00,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:28:00,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:00,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:00,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:02,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:02,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:03,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:05,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:05,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-13 23:28:05,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:28:05,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 23:28:05,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:05,067 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:05,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:28:05,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:28:05,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 23:28:05,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:05,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:28:05,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:05,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:05,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:05,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:28:05,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:28:05,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:28:05,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:05,151 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:05,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:28:05,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:28:05,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:28:05,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:05,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-10-13 23:28:05,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:05,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:05,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:05,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:28:05,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:28:05,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:28:05,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:05,154 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:05,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:28:05,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:28:05,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:28:05,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:05,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-10-13 23:28:05,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:05,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:05,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:05,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:28:05,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:28:05,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:28:05,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:05,158 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:05,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:28:05,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:28:05,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:28:05,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:05,164 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 4 proven. 64 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-10-13 23:28:05,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [316884864] [2020-10-13 23:28:05,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:28:05,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:28:05,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318836321] [2020-10-13 23:28:05,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:28:05,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:28:05,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:28:05,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:28:05,166 INFO L87 Difference]: Start difference. First operand 171 states and 213 transitions. Second operand 12 states. [2020-10-13 23:28:05,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:28:05,264 INFO L93 Difference]: Finished difference Result 322 states and 406 transitions. [2020-10-13 23:28:05,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 23:28:05,265 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 89 [2020-10-13 23:28:05,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:28:05,266 INFO L225 Difference]: With dead ends: 322 [2020-10-13 23:28:05,266 INFO L226 Difference]: Without dead ends: 174 [2020-10-13 23:28:05,268 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 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 23:28:05,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-13 23:28:05,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 173. [2020-10-13 23:28:05,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-10-13 23:28:05,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 215 transitions. [2020-10-13 23:28:05,280 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 215 transitions. Word has length 89 [2020-10-13 23:28:05,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:28:05,280 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 215 transitions. [2020-10-13 23:28:05,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:28:05,280 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 215 transitions. [2020-10-13 23:28:05,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-13 23:28:05,281 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:28:05,282 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 9, 9, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:28:05,282 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 23:28:05,282 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:28:05,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:28:05,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1388295856, now seen corresponding path program 12 times [2020-10-13 23:28:05,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:28:05,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1076603137] [2020-10-13 23:28:05,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:28:05,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:05,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:05,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:08,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:08,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:09,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:10,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:10,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-13 23:28:10,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:28:10,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:28:10,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:10,296 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:10,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 23:28:10,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-13 23:28:10,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-13 23:28:10,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:10,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:28:10,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:10,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:10,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:10,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:28:10,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:28:10,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:28:10,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:10,448 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:10,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:28:10,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:28:10,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:28:10,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:10,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-13 23:28:10,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:10,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:10,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:10,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:28:10,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:28:10,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:28:10,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:10,452 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:10,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:28:10,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:28:10,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:28:10,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:10,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-10-13 23:28:10,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:10,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:10,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:10,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:28:10,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:28:10,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:28:10,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:10,455 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:10,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:28:10,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:28:10,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:28:10,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:10,461 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 5 proven. 247 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2020-10-13 23:28:10,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1076603137] [2020-10-13 23:28:10,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:28:10,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 23:28:10,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271240418] [2020-10-13 23:28:10,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 23:28:10,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:28:10,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 23:28:10,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:28:10,463 INFO L87 Difference]: Start difference. First operand 173 states and 215 transitions. Second operand 17 states. [2020-10-13 23:28:10,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:28:10,646 INFO L93 Difference]: Finished difference Result 335 states and 427 transitions. [2020-10-13 23:28:10,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 23:28:10,647 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 91 [2020-10-13 23:28:10,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:28:10,649 INFO L225 Difference]: With dead ends: 335 [2020-10-13 23:28:10,649 INFO L226 Difference]: Without dead ends: 188 [2020-10-13 23:28:10,650 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 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 23:28:10,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-10-13 23:28:10,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 182. [2020-10-13 23:28:10,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-10-13 23:28:10,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 227 transitions. [2020-10-13 23:28:10,660 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 227 transitions. Word has length 91 [2020-10-13 23:28:10,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:28:10,661 INFO L479 AbstractCegarLoop]: Abstraction has 182 states and 227 transitions. [2020-10-13 23:28:10,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 23:28:10,661 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 227 transitions. [2020-10-13 23:28:10,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-13 23:28:10,662 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:28:10,662 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 9, 9, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:28:10,662 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 23:28:10,663 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:28:10,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:28:10,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1910179421, now seen corresponding path program 13 times [2020-10-13 23:28:10,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:28:10,663 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [874461330] [2020-10-13 23:28:10,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:28:10,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:10,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:10,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:13,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:13,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:15,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:15,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:15,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-13 23:28:15,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:28:15,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 23:28:15,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:15,677 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:15,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 23:28:15,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:28:15,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 23:28:15,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:15,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:28:15,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:15,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:15,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:15,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:28:15,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:28:15,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:28:15,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:15,766 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:15,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:28:15,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:28:15,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:28:15,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:15,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-10-13 23:28:15,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:15,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:15,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:15,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:28:15,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:28:15,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:28:15,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:15,770 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:15,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:28:15,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:28:15,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:28:15,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:15,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-10-13 23:28:15,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:15,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:15,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:15,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:28:15,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:28:15,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:28:15,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:15,774 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:15,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:28:15,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:28:15,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:28:15,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:15,779 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 4 proven. 81 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2020-10-13 23:28:15,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [874461330] [2020-10-13 23:28:15,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:28:15,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 23:28:15,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772499799] [2020-10-13 23:28:15,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 23:28:15,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:28:15,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 23:28:15,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:28:15,782 INFO L87 Difference]: Start difference. First operand 182 states and 227 transitions. Second operand 13 states. [2020-10-13 23:28:15,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:28:15,870 INFO L93 Difference]: Finished difference Result 342 states and 432 transitions. [2020-10-13 23:28:15,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 23:28:15,870 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 94 [2020-10-13 23:28:15,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:28:15,872 INFO L225 Difference]: With dead ends: 342 [2020-10-13 23:28:15,872 INFO L226 Difference]: Without dead ends: 185 [2020-10-13 23:28:15,873 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 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 23:28:15,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-13 23:28:15,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 184. [2020-10-13 23:28:15,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-10-13 23:28:15,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 229 transitions. [2020-10-13 23:28:15,883 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 229 transitions. Word has length 94 [2020-10-13 23:28:15,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:28:15,883 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 229 transitions. [2020-10-13 23:28:15,883 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 23:28:15,883 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 229 transitions. [2020-10-13 23:28:15,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-13 23:28:15,884 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:28:15,885 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:28:15,885 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 23:28:15,885 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:28:15,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:28:15,885 INFO L82 PathProgramCache]: Analyzing trace with hash -744262843, now seen corresponding path program 14 times [2020-10-13 23:28:15,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:28:15,886 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [14351485] [2020-10-13 23:28:15,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:28:15,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:15,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:15,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:19,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:19,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:20,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:20,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-13 23:28:20,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:28:20,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-13 23:28:20,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:20,912 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:20,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 23:28:20,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-13 23:28:20,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 23:28:20,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:21,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:28:21,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:21,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:21,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:21,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:28:21,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:28:21,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:28:21,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:21,090 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:21,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:28:21,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:28:21,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:28:21,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:21,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-10-13 23:28:21,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:21,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:21,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:21,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:28:21,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:28:21,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:28:21,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:21,093 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:21,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:28:21,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:28:21,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:28:21,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:21,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-10-13 23:28:21,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:21,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:21,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:21,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:28:21,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:28:21,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:28:21,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:21,096 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:21,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:28:21,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:28:21,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:28:21,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:21,102 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 5 proven. 287 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-10-13 23:28:21,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [14351485] [2020-10-13 23:28:21,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:28:21,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 23:28:21,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346445693] [2020-10-13 23:28:21,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 23:28:21,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:28:21,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 23:28:21,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:28:21,105 INFO L87 Difference]: Start difference. First operand 184 states and 229 transitions. Second operand 18 states. [2020-10-13 23:28:21,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:28:21,300 INFO L93 Difference]: Finished difference Result 355 states and 453 transitions. [2020-10-13 23:28:21,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 23:28:21,300 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 96 [2020-10-13 23:28:21,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:28:21,301 INFO L225 Difference]: With dead ends: 355 [2020-10-13 23:28:21,302 INFO L226 Difference]: Without dead ends: 199 [2020-10-13 23:28:21,303 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 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 23:28:21,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-13 23:28:21,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 193. [2020-10-13 23:28:21,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-10-13 23:28:21,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 241 transitions. [2020-10-13 23:28:21,313 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 241 transitions. Word has length 96 [2020-10-13 23:28:21,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:28:21,313 INFO L479 AbstractCegarLoop]: Abstraction has 193 states and 241 transitions. [2020-10-13 23:28:21,313 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 23:28:21,314 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 241 transitions. [2020-10-13 23:28:21,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-13 23:28:21,315 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:28:21,315 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:28:21,315 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 23:28:21,315 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:28:21,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:28:21,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1810138898, now seen corresponding path program 15 times [2020-10-13 23:28:21,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:28:21,316 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [15206219] [2020-10-13 23:28:21,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:28:21,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:21,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:21,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:25,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:25,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:26,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:26,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-13 23:28:26,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:28:26,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 23:28:26,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:26,334 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:26,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:28:26,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:28:26,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 23:28:26,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:26,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:28:26,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:26,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:26,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:26,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:28:26,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:28:26,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:28:26,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:26,435 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:26,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:28:26,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:28:26,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:28:26,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:26,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-10-13 23:28:26,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:26,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:26,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:26,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:28:26,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:28:26,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:28:26,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:26,439 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:26,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:28:26,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:28:26,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:28:26,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:28:26,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-10-13 23:28:26,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:26,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:26,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:26,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:28:26,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:28:26,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:28:26,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:26,444 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:26,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:28:26,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:28:26,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:28:26,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:26,451 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 4 proven. 100 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2020-10-13 23:28:26,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [15206219] [2020-10-13 23:28:26,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:28:26,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:28:26,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693905121] [2020-10-13 23:28:26,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:28:26,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:28:26,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:28:26,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:28:26,453 INFO L87 Difference]: Start difference. First operand 193 states and 241 transitions. Second operand 14 states. [2020-10-13 23:28:26,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:28:26,568 INFO L93 Difference]: Finished difference Result 362 states and 458 transitions. [2020-10-13 23:28:26,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 23:28:26,569 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 99 [2020-10-13 23:28:26,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:28:26,570 INFO L225 Difference]: With dead ends: 362 [2020-10-13 23:28:26,570 INFO L226 Difference]: Without dead ends: 196 [2020-10-13 23:28:26,571 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:28:26,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-13 23:28:26,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 195. [2020-10-13 23:28:26,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-10-13 23:28:26,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 243 transitions. [2020-10-13 23:28:26,587 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 243 transitions. Word has length 99 [2020-10-13 23:28:26,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:28:26,588 INFO L479 AbstractCegarLoop]: Abstraction has 195 states and 243 transitions. [2020-10-13 23:28:26,588 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:28:26,588 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 243 transitions. [2020-10-13 23:28:26,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-13 23:28:26,589 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:28:26,590 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 11, 11, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:28:26,590 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 23:28:26,590 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:28:26,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:28:26,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1674464116, now seen corresponding path program 16 times [2020-10-13 23:28:26,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:28:26,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [939006930] [2020-10-13 23:28:26,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:28:26,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:26,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:26,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:31,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:31,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:31,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-13 23:28:31,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:28:31,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-13 23:28:31,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:31,646 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:31,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 23:28:31,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-13 23:28:31,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-13 23:28:31,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:31,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:28:31,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:31,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:31,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:31,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:28:31,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:28:31,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:28:31,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:31,999 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:32,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:28:32,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:28:32,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:28:32,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:32,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-10-13 23:28:32,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:32,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:32,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:32,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:28:32,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:28:32,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:28:32,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:32,004 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:32,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:28:32,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:28:32,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:28:32,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:32,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-10-13 23:28:32,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:32,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:32,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:32,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:28:32,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:28:32,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:28:32,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:32,010 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:32,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:28:32,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:28:32,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:28:32,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:32,029 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 5 proven. 116 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2020-10-13 23:28:32,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [939006930] [2020-10-13 23:28:32,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:28:32,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 23:28:32,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215090731] [2020-10-13 23:28:32,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 23:28:32,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:28:32,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 23:28:32,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:28:32,031 INFO L87 Difference]: Start difference. First operand 195 states and 243 transitions. Second operand 19 states. [2020-10-13 23:28:33,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:28:33,269 INFO L93 Difference]: Finished difference Result 267 states and 336 transitions. [2020-10-13 23:28:33,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 23:28:33,270 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 101 [2020-10-13 23:28:33,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:28:33,273 INFO L225 Difference]: With dead ends: 267 [2020-10-13 23:28:33,273 INFO L226 Difference]: Without dead ends: 265 [2020-10-13 23:28:33,274 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=144, Invalid=1338, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 23:28:33,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-10-13 23:28:33,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 203. [2020-10-13 23:28:33,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-10-13 23:28:33,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 252 transitions. [2020-10-13 23:28:33,287 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 252 transitions. Word has length 101 [2020-10-13 23:28:33,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:28:33,287 INFO L479 AbstractCegarLoop]: Abstraction has 203 states and 252 transitions. [2020-10-13 23:28:33,287 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 23:28:33,287 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 252 transitions. [2020-10-13 23:28:33,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-13 23:28:33,288 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:28:33,289 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 11, 11, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:28:33,289 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 23:28:33,289 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:28:33,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:28:33,289 INFO L82 PathProgramCache]: Analyzing trace with hash 791139055, now seen corresponding path program 2 times [2020-10-13 23:28:33,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:28:33,290 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1221046961] [2020-10-13 23:28:33,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:28:33,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:33,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:33,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:38,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:38,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:38,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:38,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-13 23:28:38,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:28:38,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-13 23:28:38,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:38,316 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:38,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:28:38,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 84 [2020-10-13 23:28:38,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 23:28:38,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:38,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:28:38,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:38,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:38,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:38,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:28:38,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:28:38,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:28:38,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:38,352 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:38,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:28:38,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:28:38,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:28:38,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:38,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-10-13 23:28:38,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:38,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:38,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:38,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:28:38,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:28:38,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:28:38,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:38,356 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:38,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:28:38,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:28:38,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:28:38,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:38,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-10-13 23:28:38,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:38,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:38,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:38,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:28:38,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:28:38,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:28:38,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:38,360 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:38,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:28:38,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:28:38,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:28:38,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:38,365 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2020-10-13 23:28:38,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1221046961] [2020-10-13 23:28:38,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:28:38,365 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 23:28:38,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307139243] [2020-10-13 23:28:38,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 23:28:38,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:28:38,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 23:28:38,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:28:38,367 INFO L87 Difference]: Start difference. First operand 203 states and 252 transitions. Second operand 7 states. [2020-10-13 23:28:38,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:28:38,491 INFO L93 Difference]: Finished difference Result 223 states and 275 transitions. [2020-10-13 23:28:38,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 23:28:38,492 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 104 [2020-10-13 23:28:38,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:28:38,494 INFO L225 Difference]: With dead ends: 223 [2020-10-13 23:28:38,495 INFO L226 Difference]: Without dead ends: 210 [2020-10-13 23:28:38,495 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:28:38,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-13 23:28:38,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 203. [2020-10-13 23:28:38,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-10-13 23:28:38,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 251 transitions. [2020-10-13 23:28:38,507 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 251 transitions. Word has length 104 [2020-10-13 23:28:38,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:28:38,507 INFO L479 AbstractCegarLoop]: Abstraction has 203 states and 251 transitions. [2020-10-13 23:28:38,507 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 23:28:38,507 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 251 transitions. [2020-10-13 23:28:38,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-13 23:28:38,508 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:28:38,508 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:28:38,509 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 23:28:38,509 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:28:38,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:28:38,509 INFO L82 PathProgramCache]: Analyzing trace with hash -724247745, now seen corresponding path program 17 times [2020-10-13 23:28:38,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:28:38,510 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1961049444] [2020-10-13 23:28:38,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:28:38,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:38,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:38,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:43,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:43,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:43,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-13 23:28:43,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:28:43,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5075 [2020-10-13 23:28:43,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:43,597 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:43,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 23:28:43,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-13 23:28:43,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 23:28:43,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:43,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:28:43,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:43,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:43,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:43,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:28:43,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:28:43,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:28:43,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:43,788 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:43,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:28:43,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:28:43,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:28:43,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:43,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-10-13 23:28:43,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:43,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:43,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:43,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:28:43,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:28:43,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:28:43,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:43,793 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:43,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:28:43,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:28:43,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:28:43,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:43,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-10-13 23:28:43,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:43,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:43,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:43,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:28:43,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:28:43,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:28:43,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:43,797 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:43,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:28:43,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:28:43,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:28:43,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:28:43,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-10-13 23:28:43,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:43,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:43,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:43,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:28:43,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:28:43,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:28:43,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:43,801 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:43,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:28:43,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:28:43,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:28:43,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:43,812 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 7 proven. 330 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2020-10-13 23:28:43,813 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1961049444] [2020-10-13 23:28:43,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:28:43,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 23:28:43,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584203714] [2020-10-13 23:28:43,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 23:28:43,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:28:43,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 23:28:43,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:28:43,814 INFO L87 Difference]: Start difference. First operand 203 states and 251 transitions. Second operand 19 states. [2020-10-13 23:28:43,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:28:43,949 INFO L93 Difference]: Finished difference Result 391 states and 495 transitions. [2020-10-13 23:28:43,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 23:28:43,952 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 109 [2020-10-13 23:28:43,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:28:43,954 INFO L225 Difference]: With dead ends: 391 [2020-10-13 23:28:43,954 INFO L226 Difference]: Without dead ends: 218 [2020-10-13 23:28:43,955 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 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 23:28:43,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-10-13 23:28:43,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 212. [2020-10-13 23:28:43,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-10-13 23:28:43,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 263 transitions. [2020-10-13 23:28:43,970 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 263 transitions. Word has length 109 [2020-10-13 23:28:43,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:28:43,970 INFO L479 AbstractCegarLoop]: Abstraction has 212 states and 263 transitions. [2020-10-13 23:28:43,970 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 23:28:43,970 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 263 transitions. [2020-10-13 23:28:43,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-13 23:28:43,971 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:28:43,971 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:28:43,971 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 23:28:43,972 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:28:43,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:28:43,972 INFO L82 PathProgramCache]: Analyzing trace with hash 719395322, now seen corresponding path program 18 times [2020-10-13 23:28:43,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:28:43,973 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [130742737] [2020-10-13 23:28:43,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:28:43,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:43,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:44,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:48,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:48,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-13 23:28:48,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:28:48,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 23:28:48,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:48,989 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:48,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 23:28:48,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-13 23:28:48,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 23:28:48,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:49,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:28:49,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:49,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:49,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:49,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:28:49,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:28:49,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:28:49,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:49,195 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:49,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:28:49,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:28:49,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:28:49,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:49,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-10-13 23:28:49,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:49,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:49,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:49,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:28:49,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:28:49,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:28:49,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:49,199 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:49,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:28:49,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:28:49,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:28:49,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:49,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-10-13 23:28:49,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:49,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:49,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:49,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:28:49,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:28:49,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:28:49,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:49,202 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:49,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:28:49,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:28:49,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:28:49,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:49,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-10-13 23:28:49,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:49,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:49,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:49,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:28:49,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:28:49,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:28:49,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:49,206 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:49,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:28:49,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:28:49,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:28:49,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:49,212 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 7 proven. 376 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2020-10-13 23:28:49,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [130742737] [2020-10-13 23:28:49,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:28:49,213 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 23:28:49,213 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193119266] [2020-10-13 23:28:49,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 23:28:49,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:28:49,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 23:28:49,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:28:49,214 INFO L87 Difference]: Start difference. First operand 212 states and 263 transitions. Second operand 20 states. [2020-10-13 23:28:49,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:28:49,379 INFO L93 Difference]: Finished difference Result 409 states and 519 transitions. [2020-10-13 23:28:49,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 23:28:49,380 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 112 [2020-10-13 23:28:49,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:28:49,382 INFO L225 Difference]: With dead ends: 409 [2020-10-13 23:28:49,382 INFO L226 Difference]: Without dead ends: 227 [2020-10-13 23:28:49,384 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:28:49,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-13 23:28:49,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 221. [2020-10-13 23:28:49,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-10-13 23:28:49,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 275 transitions. [2020-10-13 23:28:49,394 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 275 transitions. Word has length 112 [2020-10-13 23:28:49,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:28:49,394 INFO L479 AbstractCegarLoop]: Abstraction has 221 states and 275 transitions. [2020-10-13 23:28:49,394 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 23:28:49,394 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 275 transitions. [2020-10-13 23:28:49,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-13 23:28:49,395 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:28:49,395 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:28:49,396 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 23:28:49,396 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:28:49,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:28:49,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1512497825, now seen corresponding path program 19 times [2020-10-13 23:28:49,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:28:49,396 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [970322956] [2020-10-13 23:28:49,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:28:49,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:49,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:49,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:54,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:54,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-13 23:28:54,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:28:54,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-13 23:28:54,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:54,423 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:54,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 23:28:54,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:28:54,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 23:28:54,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:54,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:28:54,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:54,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:54,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:54,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:28:54,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:28:54,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:28:54,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:54,540 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:54,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:28:54,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:28:54,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:28:54,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:54,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-10-13 23:28:54,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:54,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:54,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:54,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:28:54,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:28:54,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:28:54,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:54,543 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:54,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:28:54,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:28:54,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:28:54,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:54,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-13 23:28:54,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:54,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:54,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:54,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:28:54,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:28:54,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:28:54,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:54,546 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:54,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:28:54,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:28:54,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:28:54,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:54,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-10-13 23:28:54,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:54,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:54,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:54,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:28:54,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:28:54,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:28:54,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:54,550 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:54,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:28:54,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:28:54,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:28:54,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:54,557 INFO L134 CoverageAnalysis]: Checked inductivity of 583 backedges. 6 proven. 121 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2020-10-13 23:28:54,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [970322956] [2020-10-13 23:28:54,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:28:54,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 23:28:54,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675987771] [2020-10-13 23:28:54,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 23:28:54,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:28:54,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 23:28:54,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:28:54,560 INFO L87 Difference]: Start difference. First operand 221 states and 275 transitions. Second operand 15 states. [2020-10-13 23:28:54,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:28:54,680 INFO L93 Difference]: Finished difference Result 416 states and 524 transitions. [2020-10-13 23:28:54,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 23:28:54,680 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 115 [2020-10-13 23:28:54,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:28:54,682 INFO L225 Difference]: With dead ends: 416 [2020-10-13 23:28:54,682 INFO L226 Difference]: Without dead ends: 224 [2020-10-13 23:28:54,683 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 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 23:28:54,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-13 23:28:54,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 223. [2020-10-13 23:28:54,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-10-13 23:28:54,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 277 transitions. [2020-10-13 23:28:54,696 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 277 transitions. Word has length 115 [2020-10-13 23:28:54,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:28:54,697 INFO L479 AbstractCegarLoop]: Abstraction has 223 states and 277 transitions. [2020-10-13 23:28:54,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 23:28:54,697 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 277 transitions. [2020-10-13 23:28:54,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-13 23:28:54,700 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:28:54,701 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:28:54,701 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 23:28:54,701 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:28:54,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:28:54,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1326424835, now seen corresponding path program 20 times [2020-10-13 23:28:54,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:28:54,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1686086210] [2020-10-13 23:28:54,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:28:54,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:54,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:54,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:59,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:59,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-13 23:28:59,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:28:59,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 23:28:59,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:59,729 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:59,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 23:28:59,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-13 23:28:59,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-13 23:28:59,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:59,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:28:59,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:59,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:59,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:59,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:28:59,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:28:59,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:28:59,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:59,945 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:59,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:28:59,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:28:59,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:28:59,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:28:59,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-10-13 23:28:59,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:59,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:59,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:59,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:28:59,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:28:59,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:28:59,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:59,948 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:59,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:28:59,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:28:59,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:28:59,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:59,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-10-13 23:28:59,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:59,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:59,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:59,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:28:59,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:28:59,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:28:59,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:59,951 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:59,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:28:59,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:28:59,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:28:59,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:59,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-10-13 23:28:59,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:59,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:59,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:59,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:28:59,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:28:59,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:28:59,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:59,954 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:59,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:28:59,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:28:59,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:28:59,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:59,962 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 7 proven. 425 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2020-10-13 23:28:59,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1686086210] [2020-10-13 23:28:59,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:28:59,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 23:28:59,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425008107] [2020-10-13 23:28:59,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 23:28:59,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:28:59,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 23:28:59,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:28:59,964 INFO L87 Difference]: Start difference. First operand 223 states and 277 transitions. Second operand 21 states. [2020-10-13 23:29:00,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:29:00,112 INFO L93 Difference]: Finished difference Result 429 states and 545 transitions. [2020-10-13 23:29:00,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 23:29:00,113 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 117 [2020-10-13 23:29:00,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:29:00,115 INFO L225 Difference]: With dead ends: 429 [2020-10-13 23:29:00,115 INFO L226 Difference]: Without dead ends: 238 [2020-10-13 23:29:00,116 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:29:00,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-10-13 23:29:00,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 232. [2020-10-13 23:29:00,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-10-13 23:29:00,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 289 transitions. [2020-10-13 23:29:00,126 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 289 transitions. Word has length 117 [2020-10-13 23:29:00,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:29:00,127 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 289 transitions. [2020-10-13 23:29:00,127 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 23:29:00,127 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 289 transitions. [2020-10-13 23:29:00,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-13 23:29:00,128 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:29:00,128 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:29:00,128 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 23:29:00,128 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:29:00,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:29:00,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1340102524, now seen corresponding path program 21 times [2020-10-13 23:29:00,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:29:00,129 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2057555604] [2020-10-13 23:29:00,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:29:00,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:00,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:00,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:05,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:05,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-13 23:29:05,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:29:05,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-13 23:29:05,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:05,161 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:05,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:29:05,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:29:05,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 23:29:05,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:05,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:29:05,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:05,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:05,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:05,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:29:05,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:29:05,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:29:05,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:05,308 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:05,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:29:05,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:29:05,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:29:05,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:05,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-10-13 23:29:05,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:05,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:05,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:05,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:29:05,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:29:05,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:29:05,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:05,312 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:05,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:29:05,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:29:05,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:29:05,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:05,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-10-13 23:29:05,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:05,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:05,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:05,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:29:05,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:29:05,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:29:05,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:05,315 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:05,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:29:05,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:29:05,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:29:05,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:05,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-13 23:29:05,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:05,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:05,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:05,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:29:05,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:29:05,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:29:05,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:05,317 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:05,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:29:05,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:29:05,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:29:05,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:05,324 INFO L134 CoverageAnalysis]: Checked inductivity of 658 backedges. 6 proven. 144 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2020-10-13 23:29:05,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2057555604] [2020-10-13 23:29:05,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:29:05,325 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:29:05,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529795067] [2020-10-13 23:29:05,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:29:05,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:29:05,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:29:05,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:29:05,325 INFO L87 Difference]: Start difference. First operand 232 states and 289 transitions. Second operand 16 states. [2020-10-13 23:29:05,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:29:05,468 INFO L93 Difference]: Finished difference Result 436 states and 550 transitions. [2020-10-13 23:29:05,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 23:29:05,469 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 120 [2020-10-13 23:29:05,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:29:05,470 INFO L225 Difference]: With dead ends: 436 [2020-10-13 23:29:05,471 INFO L226 Difference]: Without dead ends: 235 [2020-10-13 23:29:05,472 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 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 23:29:05,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-10-13 23:29:05,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 234. [2020-10-13 23:29:05,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-10-13 23:29:05,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 291 transitions. [2020-10-13 23:29:05,482 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 291 transitions. Word has length 120 [2020-10-13 23:29:05,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:29:05,482 INFO L479 AbstractCegarLoop]: Abstraction has 234 states and 291 transitions. [2020-10-13 23:29:05,482 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:29:05,483 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 291 transitions. [2020-10-13 23:29:05,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-13 23:29:05,483 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:29:05,484 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 13, 13, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:29:05,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 23:29:05,484 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:29:05,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:29:05,484 INFO L82 PathProgramCache]: Analyzing trace with hash 706095774, now seen corresponding path program 22 times [2020-10-13 23:29:05,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:29:05,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [393949127] [2020-10-13 23:29:05,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:29:05,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:05,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:05,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:10,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:10,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-13 23:29:10,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:29:10,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-13 23:29:10,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:10,516 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:10,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 23:29:10,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-13 23:29:10,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-13 23:29:10,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:10,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:29:10,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:10,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:10,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:10,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:29:10,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:29:10,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:29:10,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:10,762 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:10,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:29:10,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:29:10,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:29:10,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:10,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-10-13 23:29:10,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:10,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:10,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:10,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:29:10,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:29:10,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:29:10,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:10,766 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:10,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:29:10,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:29:10,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:29:10,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:10,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2020-10-13 23:29:10,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:10,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:10,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:10,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:29:10,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:29:10,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:29:10,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:10,769 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:10,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:29:10,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:29:10,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:29:10,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:10,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-10-13 23:29:10,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:10,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:10,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:10,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:29:10,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:29:10,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:29:10,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:10,772 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:10,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:29:10,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:29:10,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:29:10,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:10,779 INFO L134 CoverageAnalysis]: Checked inductivity of 683 backedges. 7 proven. 477 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2020-10-13 23:29:10,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [393949127] [2020-10-13 23:29:10,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:29:10,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 23:29:10,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73629276] [2020-10-13 23:29:10,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 23:29:10,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:29:10,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 23:29:10,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:29:10,781 INFO L87 Difference]: Start difference. First operand 234 states and 291 transitions. Second operand 22 states. [2020-10-13 23:29:11,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:29:11,011 INFO L93 Difference]: Finished difference Result 449 states and 571 transitions. [2020-10-13 23:29:11,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 23:29:11,011 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 122 [2020-10-13 23:29:11,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:29:11,013 INFO L225 Difference]: With dead ends: 449 [2020-10-13 23:29:11,013 INFO L226 Difference]: Without dead ends: 249 [2020-10-13 23:29:11,014 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 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 23:29:11,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-10-13 23:29:11,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 243. [2020-10-13 23:29:11,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2020-10-13 23:29:11,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 303 transitions. [2020-10-13 23:29:11,025 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 303 transitions. Word has length 122 [2020-10-13 23:29:11,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:29:11,026 INFO L479 AbstractCegarLoop]: Abstraction has 243 states and 303 transitions. [2020-10-13 23:29:11,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 23:29:11,026 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 303 transitions. [2020-10-13 23:29:11,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-13 23:29:11,027 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:29:11,027 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 13, 13, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:29:11,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 23:29:11,028 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:29:11,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:29:11,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1712626235, now seen corresponding path program 23 times [2020-10-13 23:29:11,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:29:11,028 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2069558963] [2020-10-13 23:29:11,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:29:11,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:11,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:11,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:16,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:16,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-13 23:29:16,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:29:16,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:29:16,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:16,042 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:16,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 23:29:16,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-13 23:29:16,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-13 23:29:16,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:16,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:29:16,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:16,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:16,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:16,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:29:16,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:29:16,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:29:16,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:16,315 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:16,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:29:16,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:29:16,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:29:16,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:16,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-10-13 23:29:16,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:16,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:16,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:16,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:29:16,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:29:16,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:29:16,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:16,322 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:16,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:29:16,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:29:16,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:29:16,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 23:29:16,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-10-13 23:29:16,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:16,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:16,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:16,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:29:16,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:29:16,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:29:16,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:16,330 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:16,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:29:16,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:29:16,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:29:16,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 23:29:16,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2020-10-13 23:29:16,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:16,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:16,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:16,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:29:16,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:29:16,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:29:16,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:16,337 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:16,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:29:16,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:29:16,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:29:16,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:16,345 INFO L134 CoverageAnalysis]: Checked inductivity of 738 backedges. 7 proven. 532 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2020-10-13 23:29:16,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2069558963] [2020-10-13 23:29:16,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:29:16,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 23:29:16,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061516930] [2020-10-13 23:29:16,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 23:29:16,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:29:16,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 23:29:16,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 23:29:16,347 INFO L87 Difference]: Start difference. First operand 243 states and 303 transitions. Second operand 23 states. [2020-10-13 23:29:16,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:29:16,571 INFO L93 Difference]: Finished difference Result 467 states and 595 transitions. [2020-10-13 23:29:16,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 23:29:16,572 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 125 [2020-10-13 23:29:16,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:29:16,573 INFO L225 Difference]: With dead ends: 467 [2020-10-13 23:29:16,573 INFO L226 Difference]: Without dead ends: 258 [2020-10-13 23:29:16,574 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 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 23:29:16,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-10-13 23:29:16,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 252. [2020-10-13 23:29:16,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-10-13 23:29:16,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 315 transitions. [2020-10-13 23:29:16,587 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 315 transitions. Word has length 125 [2020-10-13 23:29:16,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:29:16,587 INFO L479 AbstractCegarLoop]: Abstraction has 252 states and 315 transitions. [2020-10-13 23:29:16,588 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 23:29:16,588 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 315 transitions. [2020-10-13 23:29:16,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-13 23:29:16,589 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:29:16,589 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 13, 13, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:29:16,589 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 23:29:16,589 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:29:16,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:29:16,590 INFO L82 PathProgramCache]: Analyzing trace with hash -200070786, now seen corresponding path program 24 times [2020-10-13 23:29:16,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:29:16,590 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [817371254] [2020-10-13 23:29:16,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:29:16,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:16,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:16,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:21,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:21,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-13 23:29:21,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:29:21,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-13 23:29:21,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:21,626 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:21,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 23:29:21,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:29:21,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 23:29:21,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:21,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:29:21,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:21,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:21,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:21,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:29:21,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:29:21,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:29:21,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:21,775 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:21,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:29:21,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:29:21,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:29:21,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:21,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-10-13 23:29:21,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:21,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:21,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:21,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:29:21,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:29:21,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:29:21,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:21,778 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:21,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:29:21,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:29:21,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:29:21,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:21,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-13 23:29:21,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:21,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:21,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:21,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:29:21,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:29:21,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:29:21,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:21,781 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:21,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:29:21,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:29:21,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:29:21,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:21,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2020-10-13 23:29:21,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:21,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:21,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:21,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:29:21,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:29:21,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:29:21,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:21,784 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:21,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:29:21,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:29:21,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:29:21,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:21,791 INFO L134 CoverageAnalysis]: Checked inductivity of 796 backedges. 6 proven. 169 refuted. 0 times theorem prover too weak. 621 trivial. 0 not checked. [2020-10-13 23:29:21,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [817371254] [2020-10-13 23:29:21,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:29:21,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 23:29:21,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087634236] [2020-10-13 23:29:21,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 23:29:21,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:29:21,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 23:29:21,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:29:21,792 INFO L87 Difference]: Start difference. First operand 252 states and 315 transitions. Second operand 17 states. [2020-10-13 23:29:21,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:29:21,924 INFO L93 Difference]: Finished difference Result 474 states and 600 transitions. [2020-10-13 23:29:21,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 23:29:21,925 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 128 [2020-10-13 23:29:21,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:29:21,927 INFO L225 Difference]: With dead ends: 474 [2020-10-13 23:29:21,927 INFO L226 Difference]: Without dead ends: 255 [2020-10-13 23:29:21,928 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 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 23:29:21,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-10-13 23:29:21,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 254. [2020-10-13 23:29:21,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2020-10-13 23:29:21,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 317 transitions. [2020-10-13 23:29:21,939 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 317 transitions. Word has length 128 [2020-10-13 23:29:21,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:29:21,939 INFO L479 AbstractCegarLoop]: Abstraction has 254 states and 317 transitions. [2020-10-13 23:29:21,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 23:29:21,940 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 317 transitions. [2020-10-13 23:29:21,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-13 23:29:21,941 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:29:21,941 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 14, 14, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:29:21,941 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 23:29:21,941 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:29:21,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:29:21,942 INFO L82 PathProgramCache]: Analyzing trace with hash -505628000, now seen corresponding path program 25 times [2020-10-13 23:29:21,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:29:21,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [42563382] [2020-10-13 23:29:21,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:29:21,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:21,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:21,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:26,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:26,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-13 23:29:26,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:29:26,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-13 23:29:26,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:26,985 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:26,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 23:29:26,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-13 23:29:26,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 23:29:26,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:27,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:29:27,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:27,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:27,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:27,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:29:27,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:29:27,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:29:27,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:27,285 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:27,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:29:27,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:29:27,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:29:27,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:27,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2020-10-13 23:29:27,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:27,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:27,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:27,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:29:27,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:29:27,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:29:27,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:27,288 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:27,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:29:27,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:29:27,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:29:27,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:27,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-10-13 23:29:27,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:27,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:27,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:27,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:29:27,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:29:27,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:29:27,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:27,291 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:27,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:29:27,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:29:27,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:29:27,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:27,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-10-13 23:29:27,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:27,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:27,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:27,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:29:27,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:29:27,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:29:27,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:27,294 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:27,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:29:27,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:29:27,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:29:27,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:27,303 INFO L134 CoverageAnalysis]: Checked inductivity of 823 backedges. 7 proven. 590 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2020-10-13 23:29:27,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [42563382] [2020-10-13 23:29:27,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:29:27,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 23:29:27,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516531027] [2020-10-13 23:29:27,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 23:29:27,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:29:27,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 23:29:27,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:29:27,305 INFO L87 Difference]: Start difference. First operand 254 states and 317 transitions. Second operand 24 states. [2020-10-13 23:29:27,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:29:27,563 INFO L93 Difference]: Finished difference Result 487 states and 621 transitions. [2020-10-13 23:29:27,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 23:29:27,570 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 130 [2020-10-13 23:29:27,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:29:27,571 INFO L225 Difference]: With dead ends: 487 [2020-10-13 23:29:27,572 INFO L226 Difference]: Without dead ends: 269 [2020-10-13 23:29:27,573 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:29:27,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-13 23:29:27,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 263. [2020-10-13 23:29:27,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2020-10-13 23:29:27,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 329 transitions. [2020-10-13 23:29:27,584 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 329 transitions. Word has length 130 [2020-10-13 23:29:27,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:29:27,584 INFO L479 AbstractCegarLoop]: Abstraction has 263 states and 329 transitions. [2020-10-13 23:29:27,584 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 23:29:27,584 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 329 transitions. [2020-10-13 23:29:27,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-13 23:29:27,585 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:29:27,586 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 14, 14, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:29:27,586 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-13 23:29:27,586 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:29:27,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:29:27,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1845169415, now seen corresponding path program 26 times [2020-10-13 23:29:27,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:29:27,587 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1562686902] [2020-10-13 23:29:27,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:29:27,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:27,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:27,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:32,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:32,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-13 23:29:32,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:29:32,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 23:29:32,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:32,609 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:32,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 23:29:32,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:29:32,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 23:29:32,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:32,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:29:32,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:32,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:32,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:32,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:29:32,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:29:32,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:29:32,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:32,770 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:32,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:29:32,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:29:32,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:29:32,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:32,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-10-13 23:29:32,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:32,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:32,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:32,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:29:32,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:29:32,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:29:32,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:32,776 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:32,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:29:32,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:29:32,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:29:32,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:29:32,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2020-10-13 23:29:32,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:32,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:32,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:32,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:29:32,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:29:32,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:29:32,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:32,783 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:32,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:29:32,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:29:32,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:29:32,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:29:32,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2020-10-13 23:29:32,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:32,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:32,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:32,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:29:32,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:29:32,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:29:32,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:32,789 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:32,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:29:32,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:29:32,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:29:32,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:29:32,812 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 6 proven. 196 refuted. 0 times theorem prover too weak. 682 trivial. 0 not checked. [2020-10-13 23:29:32,813 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1562686902] [2020-10-13 23:29:32,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:29:32,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 23:29:32,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768856730] [2020-10-13 23:29:32,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 23:29:32,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:29:32,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 23:29:32,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:29:32,816 INFO L87 Difference]: Start difference. First operand 263 states and 329 transitions. Second operand 18 states. [2020-10-13 23:29:32,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:29:32,946 INFO L93 Difference]: Finished difference Result 494 states and 626 transitions. [2020-10-13 23:29:32,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 23:29:32,946 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 133 [2020-10-13 23:29:32,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:29:32,947 INFO L225 Difference]: With dead ends: 494 [2020-10-13 23:29:32,948 INFO L226 Difference]: Without dead ends: 266 [2020-10-13 23:29:32,949 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 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 23:29:32,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-10-13 23:29:32,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 265. [2020-10-13 23:29:32,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-10-13 23:29:32,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 331 transitions. [2020-10-13 23:29:32,965 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 331 transitions. Word has length 133 [2020-10-13 23:29:32,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:29:32,965 INFO L479 AbstractCegarLoop]: Abstraction has 265 states and 331 transitions. [2020-10-13 23:29:32,965 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 23:29:32,966 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 331 transitions. [2020-10-13 23:29:32,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-13 23:29:32,967 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:29:32,968 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 15, 15, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:29:32,968 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-13 23:29:32,968 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:29:32,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:29:32,969 INFO L82 PathProgramCache]: Analyzing trace with hash -2104309993, now seen corresponding path program 27 times [2020-10-13 23:29:32,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:29:32,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [605013566] [2020-10-13 23:29:32,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:29:32,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:33,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:33,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:38,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:38,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-13 23:29:38,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:29:38,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-13 23:29:38,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:38,017 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:38,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 23:29:38,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-13 23:29:38,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-13 23:29:38,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:38,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:29:38,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:38,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:38,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:38,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:29:38,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:29:38,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:29:38,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:38,370 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:38,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:29:38,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:29:38,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:29:38,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:29:38,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-10-13 23:29:38,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:38,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:38,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:38,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:29:38,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:29:38,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:29:38,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:38,375 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:38,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:29:38,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:29:38,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:29:38,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:38,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2020-10-13 23:29:38,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:38,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:38,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:38,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:29:38,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:29:38,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:29:38,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:38,379 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:38,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:29:38,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:29:38,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:29:38,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:38,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2020-10-13 23:29:38,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:38,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:38,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:38,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:29:38,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:29:38,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:29:38,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:38,384 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:38,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:29:38,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:29:38,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:29:38,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:29:38,402 INFO L134 CoverageAnalysis]: Checked inductivity of 913 backedges. 7 proven. 651 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2020-10-13 23:29:38,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [605013566] [2020-10-13 23:29:38,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:29:38,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 23:29:38,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806522423] [2020-10-13 23:29:38,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 23:29:38,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:29:38,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 23:29:38,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:29:38,405 INFO L87 Difference]: Start difference. First operand 265 states and 331 transitions. Second operand 25 states. [2020-10-13 23:29:38,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:29:38,578 INFO L93 Difference]: Finished difference Result 507 states and 647 transitions. [2020-10-13 23:29:38,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 23:29:38,578 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 135 [2020-10-13 23:29:38,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:29:38,580 INFO L225 Difference]: With dead ends: 507 [2020-10-13 23:29:38,581 INFO L226 Difference]: Without dead ends: 280 [2020-10-13 23:29:38,583 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 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 23:29:38,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-10-13 23:29:38,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 274. [2020-10-13 23:29:38,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-10-13 23:29:38,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 343 transitions. [2020-10-13 23:29:38,595 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 343 transitions. Word has length 135 [2020-10-13 23:29:38,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:29:38,595 INFO L479 AbstractCegarLoop]: Abstraction has 274 states and 343 transitions. [2020-10-13 23:29:38,596 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 23:29:38,596 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 343 transitions. [2020-10-13 23:29:38,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-13 23:29:38,597 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:29:38,597 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 15, 15, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:29:38,597 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-13 23:29:38,597 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:29:38,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:29:38,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1288077534, now seen corresponding path program 28 times [2020-10-13 23:29:38,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:29:38,598 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1907362904] [2020-10-13 23:29:38,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:29:38,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:38,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:38,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:43,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:43,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 152 [2020-10-13 23:29:43,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:29:43,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 23:29:43,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:43,621 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:43,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 23:29:43,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:29:43,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 23:29:43,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:43,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:29:43,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:43,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:43,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:43,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:29:43,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:29:43,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:29:43,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:43,816 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:43,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:29:43,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:29:43,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:29:43,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:43,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-10-13 23:29:43,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:43,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:43,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:43,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:29:43,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:29:43,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:29:43,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:43,820 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:43,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:29:43,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:29:43,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:29:43,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:43,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-10-13 23:29:43,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:43,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:43,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:43,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:29:43,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:29:43,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:29:43,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:43,822 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:43,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:29:43,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:29:43,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:29:43,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:43,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2020-10-13 23:29:43,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:43,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:43,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:43,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:29:43,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:29:43,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:29:43,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:43,825 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:43,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:29:43,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:29:43,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:29:43,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:43,833 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 6 proven. 225 refuted. 0 times theorem prover too weak. 746 trivial. 0 not checked. [2020-10-13 23:29:43,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1907362904] [2020-10-13 23:29:43,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:29:43,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 23:29:43,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359810179] [2020-10-13 23:29:43,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 23:29:43,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:29:43,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 23:29:43,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:29:43,834 INFO L87 Difference]: Start difference. First operand 274 states and 343 transitions. Second operand 19 states. [2020-10-13 23:29:43,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:29:43,983 INFO L93 Difference]: Finished difference Result 514 states and 652 transitions. [2020-10-13 23:29:43,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 23:29:43,983 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 138 [2020-10-13 23:29:43,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:29:43,985 INFO L225 Difference]: With dead ends: 514 [2020-10-13 23:29:43,986 INFO L226 Difference]: Without dead ends: 277 [2020-10-13 23:29:43,986 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 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 23:29:43,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-10-13 23:29:43,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 276. [2020-10-13 23:29:43,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-10-13 23:29:43,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 345 transitions. [2020-10-13 23:29:43,997 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 345 transitions. Word has length 138 [2020-10-13 23:29:43,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:29:43,997 INFO L479 AbstractCegarLoop]: Abstraction has 276 states and 345 transitions. [2020-10-13 23:29:43,997 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 23:29:43,998 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 345 transitions. [2020-10-13 23:29:43,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-13 23:29:43,999 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:29:43,999 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 16, 16, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:29:43,999 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-13 23:29:43,999 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:29:43,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:29:44,000 INFO L82 PathProgramCache]: Analyzing trace with hash 157388228, now seen corresponding path program 29 times [2020-10-13 23:29:44,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:29:44,000 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [324715601] [2020-10-13 23:29:44,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:29:44,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:44,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:44,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:49,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:49,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-13 23:29:49,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:29:49,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-13 23:29:49,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:49,038 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:49,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 23:29:49,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-13 23:29:49,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-13 23:29:49,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:49,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:29:49,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:49,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:49,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:49,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:29:49,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:29:49,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:29:49,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:49,403 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:49,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:29:49,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:29:49,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:29:49,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:49,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2020-10-13 23:29:49,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:49,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:49,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:49,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:29:49,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:29:49,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:29:49,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:49,407 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:49,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:29:49,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:29:49,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:29:49,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:29:49,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2020-10-13 23:29:49,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:49,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:49,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:49,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:29:49,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:29:49,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:29:49,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:49,412 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:49,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:29:49,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:29:49,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:29:49,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:29:49,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2020-10-13 23:29:49,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:49,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:49,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:49,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:29:49,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:29:49,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:29:49,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:49,416 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:49,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:29:49,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:29:49,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:29:49,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:49,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 7 proven. 715 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2020-10-13 23:29:49,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [324715601] [2020-10-13 23:29:49,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:29:49,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 23:29:49,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883913263] [2020-10-13 23:29:49,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 23:29:49,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:29:49,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 23:29:49,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 23:29:49,434 INFO L87 Difference]: Start difference. First operand 276 states and 345 transitions. Second operand 26 states. [2020-10-13 23:29:49,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:29:49,684 INFO L93 Difference]: Finished difference Result 527 states and 673 transitions. [2020-10-13 23:29:49,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 23:29:49,685 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 140 [2020-10-13 23:29:49,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:29:49,687 INFO L225 Difference]: With dead ends: 527 [2020-10-13 23:29:49,687 INFO L226 Difference]: Without dead ends: 291 [2020-10-13 23:29:49,688 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 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 23:29:49,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-10-13 23:29:49,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 285. [2020-10-13 23:29:49,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 285 states. [2020-10-13 23:29:49,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 357 transitions. [2020-10-13 23:29:49,699 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 357 transitions. Word has length 140 [2020-10-13 23:29:49,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:29:49,699 INFO L479 AbstractCegarLoop]: Abstraction has 285 states and 357 transitions. [2020-10-13 23:29:49,699 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 23:29:49,699 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 357 transitions. [2020-10-13 23:29:49,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-10-13 23:29:49,700 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:29:49,700 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 16, 16, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:29:49,701 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-13 23:29:49,701 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:29:49,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:29:49,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1811651925, now seen corresponding path program 30 times [2020-10-13 23:29:49,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:29:49,701 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [336003676] [2020-10-13 23:29:49,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:29:49,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:49,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:49,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:54,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:54,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 157 [2020-10-13 23:29:54,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:29:54,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-13 23:29:54,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:54,741 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:54,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 23:29:54,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-13 23:29:54,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-13 23:29:54,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:55,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:29:55,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:55,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:55,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:55,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:29:55,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:29:55,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:29:55,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:55,112 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:55,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:29:55,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:29:55,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:29:55,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:55,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2020-10-13 23:29:55,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:55,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:55,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:55,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:29:55,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:29:55,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:29:55,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:55,115 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:55,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:29:55,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:29:55,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:29:55,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:55,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2020-10-13 23:29:55,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:55,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:55,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:55,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:29:55,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:29:55,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:29:55,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:55,117 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:55,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:29:55,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:29:55,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:29:55,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:55,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2020-10-13 23:29:55,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:55,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:55,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:55,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:29:55,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:29:55,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:29:55,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:55,120 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:55,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:29:55,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:29:55,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:29:55,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:55,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1075 backedges. 7 proven. 782 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2020-10-13 23:29:55,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [336003676] [2020-10-13 23:29:55,132 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:29:55,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 23:29:55,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475480323] [2020-10-13 23:29:55,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 23:29:55,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:29:55,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 23:29:55,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 23:29:55,133 INFO L87 Difference]: Start difference. First operand 285 states and 357 transitions. Second operand 27 states. [2020-10-13 23:29:55,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:29:55,323 INFO L93 Difference]: Finished difference Result 545 states and 697 transitions. [2020-10-13 23:29:55,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 23:29:55,324 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 143 [2020-10-13 23:29:55,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:29:55,325 INFO L225 Difference]: With dead ends: 545 [2020-10-13 23:29:55,325 INFO L226 Difference]: Without dead ends: 300 [2020-10-13 23:29:55,326 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 23:29:55,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2020-10-13 23:29:55,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 294. [2020-10-13 23:29:55,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2020-10-13 23:29:55,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 369 transitions. [2020-10-13 23:29:55,337 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 369 transitions. Word has length 143 [2020-10-13 23:29:55,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:29:55,338 INFO L479 AbstractCegarLoop]: Abstraction has 294 states and 369 transitions. [2020-10-13 23:29:55,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 23:29:55,338 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 369 transitions. [2020-10-13 23:29:55,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-13 23:29:55,339 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:29:55,339 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 16, 16, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:29:55,340 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-13 23:29:55,340 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:29:55,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:29:55,340 INFO L82 PathProgramCache]: Analyzing trace with hash -768272348, now seen corresponding path program 31 times [2020-10-13 23:29:55,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:29:55,340 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1088042291] [2020-10-13 23:29:55,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:29:55,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:55,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:55,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:00,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:00,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-10-13 23:30:00,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:30:00,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-13 23:30:00,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:00,381 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:00,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 23:30:00,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:30:00,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 23:30:00,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:30:00,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:30:00,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:00,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:00,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:00,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:30:00,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:30:00,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:30:00,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:00,588 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:00,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:00,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:30:00,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:00,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:30:00,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-10-13 23:30:00,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:00,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:00,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:00,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:30:00,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:30:00,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:30:00,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:00,593 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:00,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:00,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:30:00,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:00,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:30:00,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2020-10-13 23:30:00,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:00,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:00,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:00,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:30:00,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:30:00,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:30:00,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:00,597 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:00,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:00,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:30:00,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:00,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:30:00,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-10-13 23:30:00,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:00,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:00,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:00,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:30:00,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:30:00,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:30:00,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:00,599 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:00,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:00,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:30:00,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:00,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:30:00,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1145 backedges. 6 proven. 256 refuted. 0 times theorem prover too weak. 883 trivial. 0 not checked. [2020-10-13 23:30:00,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1088042291] [2020-10-13 23:30:00,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:30:00,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 23:30:00,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766044972] [2020-10-13 23:30:00,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 23:30:00,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:30:00,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 23:30:00,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:30:00,610 INFO L87 Difference]: Start difference. First operand 294 states and 369 transitions. Second operand 20 states. [2020-10-13 23:30:00,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:30:00,729 INFO L93 Difference]: Finished difference Result 552 states and 702 transitions. [2020-10-13 23:30:00,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 23:30:00,730 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 146 [2020-10-13 23:30:00,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:30:00,731 INFO L225 Difference]: With dead ends: 552 [2020-10-13 23:30:00,731 INFO L226 Difference]: Without dead ends: 297 [2020-10-13 23:30:00,733 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:30:00,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2020-10-13 23:30:00,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 296. [2020-10-13 23:30:00,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2020-10-13 23:30:00,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 371 transitions. [2020-10-13 23:30:00,745 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 371 transitions. Word has length 146 [2020-10-13 23:30:00,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:30:00,745 INFO L479 AbstractCegarLoop]: Abstraction has 296 states and 371 transitions. [2020-10-13 23:30:00,746 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 23:30:00,746 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 371 transitions. [2020-10-13 23:30:00,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-13 23:30:00,747 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:30:00,747 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 17, 17, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:30:00,747 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-13 23:30:00,748 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:30:00,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:30:00,748 INFO L82 PathProgramCache]: Analyzing trace with hash 297624774, now seen corresponding path program 32 times [2020-10-13 23:30:00,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:30:00,748 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1028565359] [2020-10-13 23:30:00,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:30:00,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:00,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:00,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:05,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:05,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 162 [2020-10-13 23:30:05,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:30:05,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:30:05,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:05,764 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:05,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 23:30:05,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-13 23:30:05,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-13 23:30:05,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:30:06,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:30:06,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:06,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:06,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:06,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:30:06,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:30:06,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:30:06,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:06,183 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:06,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:06,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:30:06,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:06,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:30:06,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2020-10-13 23:30:06,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:06,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:06,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:06,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:30:06,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:30:06,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:30:06,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:06,187 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:06,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:06,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:30:06,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:06,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:30:06,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2020-10-13 23:30:06,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:06,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:06,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:06,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:30:06,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:30:06,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:30:06,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:06,192 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:06,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:06,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:30:06,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:06,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:30:06,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2020-10-13 23:30:06,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:06,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:06,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:06,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:30:06,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:30:06,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:30:06,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:06,195 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:06,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:06,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:30:06,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:06,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:30:06,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1178 backedges. 7 proven. 852 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2020-10-13 23:30:06,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1028565359] [2020-10-13 23:30:06,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:30:06,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 23:30:06,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245250016] [2020-10-13 23:30:06,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 23:30:06,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:30:06,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 23:30:06,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 23:30:06,207 INFO L87 Difference]: Start difference. First operand 296 states and 371 transitions. Second operand 28 states. [2020-10-13 23:30:06,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:30:06,491 INFO L93 Difference]: Finished difference Result 565 states and 723 transitions. [2020-10-13 23:30:06,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 23:30:06,491 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 148 [2020-10-13 23:30:06,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:30:06,493 INFO L225 Difference]: With dead ends: 565 [2020-10-13 23:30:06,493 INFO L226 Difference]: Without dead ends: 311 [2020-10-13 23:30:06,494 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 23:30:06,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2020-10-13 23:30:06,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 305. [2020-10-13 23:30:06,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2020-10-13 23:30:06,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 383 transitions. [2020-10-13 23:30:06,506 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 383 transitions. Word has length 148 [2020-10-13 23:30:06,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:30:06,507 INFO L479 AbstractCegarLoop]: Abstraction has 305 states and 383 transitions. [2020-10-13 23:30:06,507 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 23:30:06,507 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 383 transitions. [2020-10-13 23:30:06,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-10-13 23:30:06,508 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:30:06,508 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 17, 17, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:30:06,508 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-13 23:30:06,509 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:30:06,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:30:06,509 INFO L82 PathProgramCache]: Analyzing trace with hash 595414803, now seen corresponding path program 33 times [2020-10-13 23:30:06,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:30:06,509 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1960448109] [2020-10-13 23:30:06,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:30:06,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:06,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:06,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:11,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:11,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-10-13 23:30:11,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:30:11,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5042 [2020-10-13 23:30:11,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:11,565 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:11,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 23:30:11,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:30:11,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 23:30:11,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:30:11,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:30:11,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:11,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:11,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:11,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:30:11,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:30:11,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:30:11,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:11,786 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:11,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:11,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:30:11,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:11,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:30:11,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2020-10-13 23:30:11,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:11,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:11,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:11,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:30:11,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:30:11,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:30:11,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:11,789 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:11,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:11,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:30:11,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:11,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:30:11,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2020-10-13 23:30:11,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:11,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:11,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:11,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:30:11,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:30:11,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:30:11,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:11,792 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:11,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:11,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:30:11,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:11,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:30:11,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-10-13 23:30:11,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:11,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:11,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:11,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:30:11,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:30:11,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:30:11,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:11,796 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:11,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:11,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:30:11,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:11,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:30:11,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1251 backedges. 6 proven. 289 refuted. 0 times theorem prover too weak. 956 trivial. 0 not checked. [2020-10-13 23:30:11,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1960448109] [2020-10-13 23:30:11,810 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:30:11,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 23:30:11,811 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482447501] [2020-10-13 23:30:11,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 23:30:11,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:30:11,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 23:30:11,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:30:11,812 INFO L87 Difference]: Start difference. First operand 305 states and 383 transitions. Second operand 21 states. [2020-10-13 23:30:11,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:30:11,960 INFO L93 Difference]: Finished difference Result 572 states and 728 transitions. [2020-10-13 23:30:11,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 23:30:11,961 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 151 [2020-10-13 23:30:11,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:30:11,964 INFO L225 Difference]: With dead ends: 572 [2020-10-13 23:30:11,964 INFO L226 Difference]: Without dead ends: 308 [2020-10-13 23:30:11,964 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:30:11,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2020-10-13 23:30:11,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 307. [2020-10-13 23:30:11,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2020-10-13 23:30:11,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 385 transitions. [2020-10-13 23:30:11,976 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 385 transitions. Word has length 151 [2020-10-13 23:30:11,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:30:11,976 INFO L479 AbstractCegarLoop]: Abstraction has 307 states and 385 transitions. [2020-10-13 23:30:11,976 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 23:30:11,976 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 385 transitions. [2020-10-13 23:30:11,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-13 23:30:11,977 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:30:11,978 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 18, 18, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:30:11,978 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-13 23:30:11,978 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:30:11,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:30:11,978 INFO L82 PathProgramCache]: Analyzing trace with hash 498440113, now seen corresponding path program 34 times [2020-10-13 23:30:11,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:30:11,979 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [636808138] [2020-10-13 23:30:11,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:30:11,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:12,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:12,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:17,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:17,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-13 23:30:17,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:30:17,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-13 23:30:17,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:17,028 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:17,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 23:30:17,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-13 23:30:17,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-13 23:30:17,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:30:17,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:30:17,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:17,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:17,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:17,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:30:17,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:30:17,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:30:17,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:17,461 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:17,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:17,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:30:17,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:17,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:30:17,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-10-13 23:30:17,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:17,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:17,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:17,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:30:17,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:30:17,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:30:17,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:17,464 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:17,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:17,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:30:17,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:17,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:30:17,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-10-13 23:30:17,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:17,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:17,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:17,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:30:17,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:30:17,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:30:17,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:17,467 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:17,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:17,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:30:17,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:17,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:30:17,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2020-10-13 23:30:17,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:17,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:17,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:17,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:30:17,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:30:17,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:30:17,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:17,470 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:17,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:17,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:30:17,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:17,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:30:17,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1286 backedges. 7 proven. 925 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2020-10-13 23:30:17,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [636808138] [2020-10-13 23:30:17,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:30:17,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 23:30:17,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085878340] [2020-10-13 23:30:17,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 23:30:17,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:30:17,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 23:30:17,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 23:30:17,484 INFO L87 Difference]: Start difference. First operand 307 states and 385 transitions. Second operand 29 states. [2020-10-13 23:30:17,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:30:17,725 INFO L93 Difference]: Finished difference Result 585 states and 749 transitions. [2020-10-13 23:30:17,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 23:30:17,725 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 153 [2020-10-13 23:30:17,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:30:17,728 INFO L225 Difference]: With dead ends: 585 [2020-10-13 23:30:17,729 INFO L226 Difference]: Without dead ends: 322 [2020-10-13 23:30:17,732 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 23:30:17,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-10-13 23:30:17,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 316. [2020-10-13 23:30:17,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2020-10-13 23:30:17,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 397 transitions. [2020-10-13 23:30:17,746 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 397 transitions. Word has length 153 [2020-10-13 23:30:17,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:30:17,746 INFO L479 AbstractCegarLoop]: Abstraction has 316 states and 397 transitions. [2020-10-13 23:30:17,747 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 23:30:17,747 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 397 transitions. [2020-10-13 23:30:17,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-10-13 23:30:17,748 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:30:17,748 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 18, 18, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:30:17,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-13 23:30:17,748 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:30:17,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:30:17,749 INFO L82 PathProgramCache]: Analyzing trace with hash 195735624, now seen corresponding path program 35 times [2020-10-13 23:30:17,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:30:17,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [971272718] [2020-10-13 23:30:17,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:30:17,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:17,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:17,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:22,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:22,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 170 [2020-10-13 23:30:22,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:30:22,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-13 23:30:22,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:22,776 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:22,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 23:30:22,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-13 23:30:22,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-13 23:30:22,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:30:23,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:30:23,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:23,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:23,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:23,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:30:23,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:30:23,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:30:23,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:23,238 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:23,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:23,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:30:23,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:23,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:30:23,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2020-10-13 23:30:23,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:23,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:23,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:23,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:30:23,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:30:23,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:30:23,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:23,241 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:23,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:23,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:30:23,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:23,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:30:23,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2020-10-13 23:30:23,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:23,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:23,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:23,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:30:23,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:30:23,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:30:23,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:23,244 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:23,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:23,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:30:23,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:23,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:30:23,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2020-10-13 23:30:23,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:23,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:23,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:23,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:30:23,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:30:23,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:30:23,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:23,247 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:23,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:23,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:30:23,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:23,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:30:23,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1362 backedges. 7 proven. 1001 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2020-10-13 23:30:23,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [971272718] [2020-10-13 23:30:23,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:30:23,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 23:30:23,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616809832] [2020-10-13 23:30:23,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 23:30:23,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:30:23,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 23:30:23,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 23:30:23,271 INFO L87 Difference]: Start difference. First operand 316 states and 397 transitions. Second operand 30 states. [2020-10-13 23:30:23,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:30:23,528 INFO L93 Difference]: Finished difference Result 603 states and 773 transitions. [2020-10-13 23:30:23,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 23:30:23,528 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 156 [2020-10-13 23:30:23,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:30:23,530 INFO L225 Difference]: With dead ends: 603 [2020-10-13 23:30:23,530 INFO L226 Difference]: Without dead ends: 331 [2020-10-13 23:30:23,531 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 23:30:23,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2020-10-13 23:30:23,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 325. [2020-10-13 23:30:23,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2020-10-13 23:30:23,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 409 transitions. [2020-10-13 23:30:23,543 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 409 transitions. Word has length 156 [2020-10-13 23:30:23,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:30:23,543 INFO L479 AbstractCegarLoop]: Abstraction has 325 states and 409 transitions. [2020-10-13 23:30:23,543 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 23:30:23,544 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 409 transitions. [2020-10-13 23:30:23,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-10-13 23:30:23,545 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:30:23,545 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 18, 18, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:30:23,545 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-13 23:30:23,545 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:30:23,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:30:23,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1757625425, now seen corresponding path program 36 times [2020-10-13 23:30:23,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:30:23,546 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [284291262] [2020-10-13 23:30:23,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:30:23,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:23,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:23,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:28,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:28,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 173 [2020-10-13 23:30:28,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:30:28,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5048 [2020-10-13 23:30:28,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:28,611 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:28,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 23:30:28,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:30:28,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 23:30:28,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:30:28,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:30:28,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:28,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:28,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:28,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:30:28,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:30:28,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:30:28,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:28,853 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:28,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:28,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:30:28,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:28,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:30:28,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2020-10-13 23:30:28,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:28,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:28,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:28,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:30:28,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:30:28,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:30:28,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:28,857 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:28,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:28,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:30:28,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:28,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:30:28,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-10-13 23:30:28,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:28,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:28,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:28,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:30:28,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:30:28,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:30:28,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:28,860 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:28,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:28,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:30:28,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:28,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:30:28,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-10-13 23:30:28,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:28,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:28,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:28,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:30:28,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:30:28,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:30:28,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:28,863 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:28,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:28,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:30:28,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:28,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:30:28,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1441 backedges. 6 proven. 324 refuted. 0 times theorem prover too weak. 1111 trivial. 0 not checked. [2020-10-13 23:30:28,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [284291262] [2020-10-13 23:30:28,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:30:28,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 23:30:28,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760045874] [2020-10-13 23:30:28,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 23:30:28,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:30:28,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 23:30:28,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:30:28,880 INFO L87 Difference]: Start difference. First operand 325 states and 409 transitions. Second operand 22 states. [2020-10-13 23:30:29,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:30:29,024 INFO L93 Difference]: Finished difference Result 610 states and 778 transitions. [2020-10-13 23:30:29,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 23:30:29,024 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 159 [2020-10-13 23:30:29,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:30:29,026 INFO L225 Difference]: With dead ends: 610 [2020-10-13 23:30:29,026 INFO L226 Difference]: Without dead ends: 328 [2020-10-13 23:30:29,027 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 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 23:30:29,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-10-13 23:30:29,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 327. [2020-10-13 23:30:29,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 327 states. [2020-10-13 23:30:29,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 411 transitions. [2020-10-13 23:30:29,039 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 411 transitions. Word has length 159 [2020-10-13 23:30:29,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:30:29,039 INFO L479 AbstractCegarLoop]: Abstraction has 327 states and 411 transitions. [2020-10-13 23:30:29,039 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 23:30:29,039 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 411 transitions. [2020-10-13 23:30:29,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-10-13 23:30:29,040 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:30:29,041 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 19, 19, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:30:29,041 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-13 23:30:29,041 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:30:29,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:30:29,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1819281135, now seen corresponding path program 37 times [2020-10-13 23:30:29,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:30:29,041 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [138793936] [2020-10-13 23:30:29,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:30:29,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:29,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:29,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking...