/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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=0.6 --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 language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem11_label05.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 12:02:17,834 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 12:02:17,837 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 12:02:17,874 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 12:02:17,874 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 12:02:17,876 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 12:02:17,878 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 12:02:17,880 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 12:02:17,883 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 12:02:17,884 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 12:02:17,885 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 12:02:17,887 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 12:02:17,887 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 12:02:17,889 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 12:02:17,890 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 12:02:17,892 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 12:02:17,893 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 12:02:17,894 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 12:02:17,896 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 12:02:17,914 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 12:02:17,916 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 12:02:17,919 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 12:02:17,924 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 12:02:17,925 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 12:02:17,932 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 12:02:17,933 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 12:02:17,933 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 12:02:17,934 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 12:02:17,935 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 12:02:17,940 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 12:02:17,940 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 12:02:17,941 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 12:02:17,943 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 12:02:17,945 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 12:02:17,946 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 12:02:17,947 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 12:02:17,947 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 12:02:17,948 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 12:02:17,948 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 12:02:17,949 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 12:02:17,951 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 12:02:17,952 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 [2020-10-28 12:02:18,018 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 12:02:18,019 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 12:02:18,021 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 12:02:18,022 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 12:02:18,022 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 12:02:18,023 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 12:02:18,023 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 12:02:18,024 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 12:02:18,024 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 12:02:18,024 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 12:02:18,025 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 12:02:18,026 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 12:02:18,026 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 12:02:18,026 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 12:02:18,026 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 12:02:18,026 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 12:02:18,027 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 12:02:18,027 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 12:02:18,027 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 12:02:18,028 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 12:02:18,028 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 12:02:18,028 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 12:02:18,028 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 12:02:18,029 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 12:02:18,029 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 12:02:18,029 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 12:02:18,029 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 12:02:18,029 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 12:02:18,030 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 12:02:18,030 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 12:02:18,485 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 12:02:18,518 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 12:02:18,522 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 12:02:18,523 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 12:02:18,525 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 12:02:18,526 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label05.c [2020-10-28 12:02:18,624 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ec9e19808/95e2a20d230b4f2b8aacd7f6dc311b0f/FLAGbc53456ba [2020-10-28 12:02:19,514 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 12:02:19,515 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem11_label05.c [2020-10-28 12:02:19,535 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ec9e19808/95e2a20d230b4f2b8aacd7f6dc311b0f/FLAGbc53456ba [2020-10-28 12:02:19,708 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ec9e19808/95e2a20d230b4f2b8aacd7f6dc311b0f [2020-10-28 12:02:19,712 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 12:02:19,719 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 12:02:19,724 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 12:02:19,724 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 12:02:19,728 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 12:02:19,730 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:02:19" (1/1) ... [2020-10-28 12:02:19,734 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@464bf060 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:02:19, skipping insertion in model container [2020-10-28 12:02:19,735 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:02:19" (1/1) ... [2020-10-28 12:02:19,743 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 12:02:19,801 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 12:02:20,463 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 12:02:20,473 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 12:02:20,638 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 12:02:20,658 INFO L208 MainTranslator]: Completed translation [2020-10-28 12:02:20,658 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:02:20 WrapperNode [2020-10-28 12:02:20,659 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 12:02:20,660 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 12:02:20,660 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 12:02:20,660 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 12:02:20,673 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:02:20" (1/1) ... [2020-10-28 12:02:20,673 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:02:20" (1/1) ... [2020-10-28 12:02:20,707 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:02:20" (1/1) ... [2020-10-28 12:02:20,708 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:02:20" (1/1) ... [2020-10-28 12:02:20,777 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:02:20" (1/1) ... [2020-10-28 12:02:20,796 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:02:20" (1/1) ... [2020-10-28 12:02:20,806 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:02:20" (1/1) ... [2020-10-28 12:02:20,825 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 12:02:20,826 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 12:02:20,827 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 12:02:20,827 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 12:02:20,828 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:02:20" (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 [2020-10-28 12:02:20,916 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 12:02:20,917 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 12:02:20,917 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 12:02:20,917 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-28 12:02:20,917 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 12:02:20,917 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-28 12:02:20,917 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 12:02:20,918 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 12:02:20,918 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 12:02:20,918 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 12:02:20,918 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 12:02:20,918 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 12:02:20,918 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 12:02:20,919 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 12:02:20,919 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 12:02:20,919 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 12:02:20,919 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 12:02:20,919 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 12:02:20,919 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 12:02:23,527 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 12:02:23,527 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 12:02:23,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:02:23 BoogieIcfgContainer [2020-10-28 12:02:23,530 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 12:02:23,532 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 12:02:23,532 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 12:02:23,536 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 12:02:23,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 12:02:19" (1/3) ... [2020-10-28 12:02:23,537 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5288398b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:02:23, skipping insertion in model container [2020-10-28 12:02:23,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:02:20" (2/3) ... [2020-10-28 12:02:23,538 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5288398b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:02:23, skipping insertion in model container [2020-10-28 12:02:23,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:02:23" (3/3) ... [2020-10-28 12:02:23,540 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem11_label05.c [2020-10-28 12:02:23,554 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 12:02:23,560 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 12:02:23,574 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 12:02:23,608 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 12:02:23,608 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 12:02:23,608 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 12:02:23,609 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 12:02:23,609 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 12:02:23,609 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 12:02:23,609 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 12:02:23,609 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 12:02:23,636 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states. [2020-10-28 12:02:23,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 12:02:23,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:02:23,649 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 12:02:23,650 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:02:23,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:02:23,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1347390814, now seen corresponding path program 1 times [2020-10-28 12:02:23,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:02:23,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [911266223] [2020-10-28 12:02:23,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:02:23,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:02:24,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:02:24,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:02:24,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 12:02:24,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:02:24,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 645 [2020-10-28 12:02:24,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:02:24,643 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:02:24,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 12:02:24,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 12:02:24,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-28 12:02:24,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 12:02:24,888 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-28 12:02:24,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:02:24,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:02:24,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:02:24,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:02:24,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:02:24,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:02:24,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-28 12:02:24,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:02:24,925 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:02:24,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:02:24,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:02:24,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 12:02:24,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:02:24,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 12:02:24,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [911266223] [2020-10-28 12:02:24,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 12:02:24,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 12:02:24,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2409716] [2020-10-28 12:02:24,968 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 12:02:24,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:02:24,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 12:02:24,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 12:02:24,991 INFO L87 Difference]: Start difference. First operand 296 states. Second operand 5 states. [2020-10-28 12:02:25,182 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-10-28 12:02:30,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:02:30,119 INFO L93 Difference]: Finished difference Result 997 states and 1783 transitions. [2020-10-28 12:02:30,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 12:02:30,122 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 71 [2020-10-28 12:02:30,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:02:30,144 INFO L225 Difference]: With dead ends: 997 [2020-10-28 12:02:30,144 INFO L226 Difference]: Without dead ends: 631 [2020-10-28 12:02:30,153 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:02:30,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2020-10-28 12:02:30,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 625. [2020-10-28 12:02:30,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 625 states. [2020-10-28 12:02:30,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 865 transitions. [2020-10-28 12:02:30,264 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 865 transitions. Word has length 71 [2020-10-28 12:02:30,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:02:30,265 INFO L481 AbstractCegarLoop]: Abstraction has 625 states and 865 transitions. [2020-10-28 12:02:30,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 12:02:30,265 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 865 transitions. [2020-10-28 12:02:30,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-10-28 12:02:30,282 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:02:30,282 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 12:02:30,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 12:02:30,283 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:02:30,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:02:30,284 INFO L82 PathProgramCache]: Analyzing trace with hash -994792381, now seen corresponding path program 1 times [2020-10-28 12:02:30,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:02:30,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2061254791] [2020-10-28 12:02:30,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:02:30,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:02:30,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:02:30,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:02:31,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:02:32,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:02:32,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-10-28 12:02:32,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 12:02:32,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2066 [2020-10-28 12:02:32,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:02:32,451 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:02:32,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 12:02:32,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 12:02:32,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-28 12:02:32,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:02:32,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:02:32,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:02:32,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:02:32,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:02:32,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:02:32,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:02:32,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 12:02:32,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:02:32,637 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:02:32,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:02:32,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:02:32,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 12:02:32,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-28 12:02:32,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:02:32,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:02:32,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:02:32,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:02:32,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 12:02:32,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:02:32,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 152 [2020-10-28 12:02:32,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:02:32,842 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:02:32,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:02:32,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:02:32,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-28 12:02:32,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:02:32,946 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 12:02:32,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2061254791] [2020-10-28 12:02:32,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 12:02:32,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 12:02:32,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683173568] [2020-10-28 12:02:32,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 12:02:32,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:02:32,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 12:02:32,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:02:32,954 INFO L87 Difference]: Start difference. First operand 625 states and 865 transitions. Second operand 7 states. [2020-10-28 12:02:36,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:02:36,667 INFO L93 Difference]: Finished difference Result 1883 states and 2649 transitions. [2020-10-28 12:02:36,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 12:02:36,669 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 143 [2020-10-28 12:02:36,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:02:36,688 INFO L225 Difference]: With dead ends: 1883 [2020-10-28 12:02:36,688 INFO L226 Difference]: Without dead ends: 1264 [2020-10-28 12:02:36,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 12:02:36,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1264 states. [2020-10-28 12:02:36,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1264 to 1216. [2020-10-28 12:02:36,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1216 states. [2020-10-28 12:02:36,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1216 states to 1216 states and 1579 transitions. [2020-10-28 12:02:36,806 INFO L78 Accepts]: Start accepts. Automaton has 1216 states and 1579 transitions. Word has length 143 [2020-10-28 12:02:36,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:02:36,808 INFO L481 AbstractCegarLoop]: Abstraction has 1216 states and 1579 transitions. [2020-10-28 12:02:36,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 12:02:36,809 INFO L276 IsEmpty]: Start isEmpty. Operand 1216 states and 1579 transitions. [2020-10-28 12:02:36,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-10-28 12:02:36,818 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:02:36,818 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 12:02:36,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 12:02:36,819 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:02:36,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:02:36,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1884988243, now seen corresponding path program 1 times [2020-10-28 12:02:36,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:02:36,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1930267699] [2020-10-28 12:02:36,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:02:36,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:02:36,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:02:36,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:02:37,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:02:38,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:02:39,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:02:39,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-10-28 12:02:39,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 12:02:39,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2246 [2020-10-28 12:02:39,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:02:39,145 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:02:39,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 12:02:39,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 12:02:39,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-28 12:02:39,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 12:02:39,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:02:39,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:02:39,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:02:39,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:02:39,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:02:39,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:02:39,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 12:02:39,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:02:39,306 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:02:39,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:02:39,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:02:39,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 12:02:39,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:02:39,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:02:39,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:02:39,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:02:39,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:02:39,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 12:02:39,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:02:39,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 144 [2020-10-28 12:02:39,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:02:39,489 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:02:39,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:02:39,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:02:39,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-28 12:02:39,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:02:39,625 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 12:02:39,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1930267699] [2020-10-28 12:02:39,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 12:02:39,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 12:02:39,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415851296] [2020-10-28 12:02:39,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 12:02:39,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:02:39,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 12:02:39,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:02:39,628 INFO L87 Difference]: Start difference. First operand 1216 states and 1579 transitions. Second operand 7 states. [2020-10-28 12:02:42,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:02:42,790 INFO L93 Difference]: Finished difference Result 2870 states and 3711 transitions. [2020-10-28 12:02:42,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 12:02:42,791 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 151 [2020-10-28 12:02:42,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:02:42,803 INFO L225 Difference]: With dead ends: 2870 [2020-10-28 12:02:42,804 INFO L226 Difference]: Without dead ends: 1660 [2020-10-28 12:02:42,808 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-28 12:02:42,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1660 states. [2020-10-28 12:02:42,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1660 to 1614. [2020-10-28 12:02:42,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1614 states. [2020-10-28 12:02:42,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1614 states to 1614 states and 2025 transitions. [2020-10-28 12:02:42,880 INFO L78 Accepts]: Start accepts. Automaton has 1614 states and 2025 transitions. Word has length 151 [2020-10-28 12:02:42,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:02:42,883 INFO L481 AbstractCegarLoop]: Abstraction has 1614 states and 2025 transitions. [2020-10-28 12:02:42,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 12:02:42,887 INFO L276 IsEmpty]: Start isEmpty. Operand 1614 states and 2025 transitions. [2020-10-28 12:02:42,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2020-10-28 12:02:42,890 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:02:42,891 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 12:02:42,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 12:02:42,891 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:02:42,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:02:42,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1987578934, now seen corresponding path program 1 times [2020-10-28 12:02:42,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:02:42,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1893013031] [2020-10-28 12:02:42,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:02:42,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:02:43,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:02:43,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:02:43,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 214 [2020-10-28 12:02:43,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:02:43,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 407 [2020-10-28 12:02:43,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:02:43,372 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:02:43,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:02:43,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 140 [2020-10-28 12:02:43,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-28 12:02:43,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:02:43,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:02:43,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:02:43,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:02:43,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:02:43,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:02:43,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:02:43,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 12:02:43,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:02:43,524 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:02:43,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:02:43,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:02:43,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:02:43,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:02:43,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:02:43,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:02:43,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:02:43,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:02:43,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-28 12:02:43,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:02:43,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 153 [2020-10-28 12:02:43,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:02:43,769 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:02:43,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:02:43,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:02:43,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-10-28 12:02:43,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:02:43,897 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 62 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 12:02:43,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1893013031] [2020-10-28 12:02:43,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:02:43,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 12:02:43,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250579438] [2020-10-28 12:02:43,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 12:02:43,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:02:43,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 12:02:43,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 12:02:43,910 INFO L87 Difference]: Start difference. First operand 1614 states and 2025 transitions. Second operand 6 states. [2020-10-28 12:02:47,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:02:47,611 INFO L93 Difference]: Finished difference Result 4040 states and 5421 transitions. [2020-10-28 12:02:47,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 12:02:47,615 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 202 [2020-10-28 12:02:47,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:02:47,633 INFO L225 Difference]: With dead ends: 4040 [2020-10-28 12:02:47,633 INFO L226 Difference]: Without dead ends: 2810 [2020-10-28 12:02:47,638 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 12:02:47,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2810 states. [2020-10-28 12:02:47,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2810 to 2601. [2020-10-28 12:02:47,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2601 states. [2020-10-28 12:02:47,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2601 states to 2601 states and 3316 transitions. [2020-10-28 12:02:47,741 INFO L78 Accepts]: Start accepts. Automaton has 2601 states and 3316 transitions. Word has length 202 [2020-10-28 12:02:47,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:02:47,744 INFO L481 AbstractCegarLoop]: Abstraction has 2601 states and 3316 transitions. [2020-10-28 12:02:47,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 12:02:47,744 INFO L276 IsEmpty]: Start isEmpty. Operand 2601 states and 3316 transitions. [2020-10-28 12:02:47,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2020-10-28 12:02:47,750 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:02:47,751 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 12:02:47,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 12:02:47,751 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:02:47,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:02:47,752 INFO L82 PathProgramCache]: Analyzing trace with hash 602538702, now seen corresponding path program 1 times [2020-10-28 12:02:47,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:02:47,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1796256675] [2020-10-28 12:02:47,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:02:47,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:02:47,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:02:47,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:02:49,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:02:50,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:02:50,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 273 [2020-10-28 12:02:50,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 12:02:50,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2962 [2020-10-28 12:02:50,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:02:50,789 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:02:50,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:02:50,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 126 [2020-10-28 12:02:50,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-28 12:02:50,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:02:50,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:02:50,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:02:50,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:02:50,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:02:50,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:02:50,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:02:50,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 12:02:50,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:02:50,938 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:02:50,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:02:50,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:02:50,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:02:50,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:02:50,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:02:50,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:02:51,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:02:51,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:02:51,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-28 12:02:51,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:02:51,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 120 [2020-10-28 12:02:51,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:02:51,113 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:02:51,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:02:51,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:02:51,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-28 12:02:51,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:02:51,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-10-28 12:02:51,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:02:51,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:02:51,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:02:51,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 12:02:51,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:02:51,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 132 [2020-10-28 12:02:51,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:02:51,336 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:02:51,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:02:51,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:02:51,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-28 12:02:51,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:02:51,572 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 195 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 12:02:51,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1796256675] [2020-10-28 12:02:51,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:02:51,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 12:02:51,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245866851] [2020-10-28 12:02:51,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 12:02:51,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:02:51,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 12:02:51,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 12:02:51,575 INFO L87 Difference]: Start difference. First operand 2601 states and 3316 transitions. Second operand 8 states. [2020-10-28 12:02:55,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:02:55,165 INFO L93 Difference]: Finished difference Result 5816 states and 7742 transitions. [2020-10-28 12:02:55,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 12:02:55,168 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 259 [2020-10-28 12:02:55,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:02:55,192 INFO L225 Difference]: With dead ends: 5816 [2020-10-28 12:02:55,192 INFO L226 Difference]: Without dead ends: 3599 [2020-10-28 12:02:55,199 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-28 12:02:55,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3599 states. [2020-10-28 12:02:55,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3599 to 3577. [2020-10-28 12:02:55,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3577 states. [2020-10-28 12:02:55,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3577 states to 3577 states and 4757 transitions. [2020-10-28 12:02:55,314 INFO L78 Accepts]: Start accepts. Automaton has 3577 states and 4757 transitions. Word has length 259 [2020-10-28 12:02:55,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:02:55,315 INFO L481 AbstractCegarLoop]: Abstraction has 3577 states and 4757 transitions. [2020-10-28 12:02:55,315 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 12:02:55,315 INFO L276 IsEmpty]: Start isEmpty. Operand 3577 states and 4757 transitions. [2020-10-28 12:02:55,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2020-10-28 12:02:55,321 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:02:55,322 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 12:02:55,322 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 12:02:55,322 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:02:55,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:02:55,323 INFO L82 PathProgramCache]: Analyzing trace with hash 41589654, now seen corresponding path program 1 times [2020-10-28 12:02:55,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:02:55,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [535740573] [2020-10-28 12:02:55,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:02:55,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:02:55,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:02:55,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:02:56,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:02:57,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:02:59,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:02:59,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 274 [2020-10-28 12:02:59,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 12:02:59,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4589 [2020-10-28 12:02:59,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:02:59,988 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:02:59,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:02:59,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 126 [2020-10-28 12:02:59,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-28 12:02:59,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:03:00,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:03:00,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:03:00,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:03:00,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:03:00,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:03:00,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:03:00,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 12:03:00,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:03:00,144 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:03:00,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:03:00,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:03:00,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:03:00,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:03:00,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:03:00,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:03:00,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:03:00,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:03:00,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-28 12:03:00,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:03:00,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 191 [2020-10-28 12:03:00,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:03:00,398 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:03:00,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:03:00,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:03:00,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-28 12:03:00,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:03:00,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-10-28 12:03:00,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:03:00,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:03:00,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:03:00,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 12:03:00,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:03:00,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 148 [2020-10-28 12:03:00,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:03:00,629 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:03:00,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:03:00,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:03:00,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-28 12:03:00,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:03:00,946 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 196 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 12:03:00,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [535740573] [2020-10-28 12:03:00,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:03:00,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 12:03:00,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393049039] [2020-10-28 12:03:00,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 12:03:00,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:03:00,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 12:03:00,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:03:00,953 INFO L87 Difference]: Start difference. First operand 3577 states and 4757 transitions. Second operand 7 states. [2020-10-28 12:03:04,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:03:04,942 INFO L93 Difference]: Finished difference Result 7467 states and 10477 transitions. [2020-10-28 12:03:04,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 12:03:04,945 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 260 [2020-10-28 12:03:04,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:03:04,977 INFO L225 Difference]: With dead ends: 7467 [2020-10-28 12:03:04,977 INFO L226 Difference]: Without dead ends: 4274 [2020-10-28 12:03:04,988 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-28 12:03:04,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4274 states. [2020-10-28 12:03:05,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4274 to 4179. [2020-10-28 12:03:05,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4179 states. [2020-10-28 12:03:05,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4179 states to 4179 states and 5464 transitions. [2020-10-28 12:03:05,153 INFO L78 Accepts]: Start accepts. Automaton has 4179 states and 5464 transitions. Word has length 260 [2020-10-28 12:03:05,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:03:05,154 INFO L481 AbstractCegarLoop]: Abstraction has 4179 states and 5464 transitions. [2020-10-28 12:03:05,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 12:03:05,154 INFO L276 IsEmpty]: Start isEmpty. Operand 4179 states and 5464 transitions. [2020-10-28 12:03:05,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2020-10-28 12:03:05,160 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:03:05,161 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 12:03:05,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 12:03:05,162 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:03:05,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:03:05,162 INFO L82 PathProgramCache]: Analyzing trace with hash 467057986, now seen corresponding path program 1 times [2020-10-28 12:03:05,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:03:05,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2134748265] [2020-10-28 12:03:05,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:03:05,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:03:05,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:03:05,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:03:05,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:03:08,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:03:10,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:03:10,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 284 [2020-10-28 12:03:10,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 12:03:10,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-28 12:03:10,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:03:10,311 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:03:10,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:03:10,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 136 [2020-10-28 12:03:10,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-28 12:03:10,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:03:10,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:03:10,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:03:10,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:03:10,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:03:10,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:03:10,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:03:10,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 12:03:10,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:03:10,473 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:03:10,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:03:10,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:03:10,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:03:10,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:03:10,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:03:10,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:03:10,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:03:10,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:03:10,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-28 12:03:10,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:03:10,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 153 [2020-10-28 12:03:10,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:03:10,696 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:03:10,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:03:10,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:03:10,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-10-28 12:03:10,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:03:10,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-10-28 12:03:10,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:03:10,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:03:10,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:03:10,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 12:03:10,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:03:10,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 122 [2020-10-28 12:03:10,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:03:10,904 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:03:10,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:03:10,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:03:10,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-28 12:03:10,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:03:11,243 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 196 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 12:03:11,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2134748265] [2020-10-28 12:03:11,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:03:11,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 12:03:11,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673079242] [2020-10-28 12:03:11,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 12:03:11,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:03:11,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 12:03:11,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:03:11,246 INFO L87 Difference]: Start difference. First operand 4179 states and 5464 transitions. Second operand 7 states. [2020-10-28 12:03:15,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:03:15,173 INFO L93 Difference]: Finished difference Result 8647 states and 11862 transitions. [2020-10-28 12:03:15,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 12:03:15,174 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 270 [2020-10-28 12:03:15,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:03:15,202 INFO L225 Difference]: With dead ends: 8647 [2020-10-28 12:03:15,202 INFO L226 Difference]: Without dead ends: 4852 [2020-10-28 12:03:15,213 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-28 12:03:15,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4852 states. [2020-10-28 12:03:15,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4852 to 4755. [2020-10-28 12:03:15,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4755 states. [2020-10-28 12:03:15,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4755 states to 4755 states and 6148 transitions. [2020-10-28 12:03:15,386 INFO L78 Accepts]: Start accepts. Automaton has 4755 states and 6148 transitions. Word has length 270 [2020-10-28 12:03:15,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:03:15,387 INFO L481 AbstractCegarLoop]: Abstraction has 4755 states and 6148 transitions. [2020-10-28 12:03:15,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 12:03:15,387 INFO L276 IsEmpty]: Start isEmpty. Operand 4755 states and 6148 transitions. [2020-10-28 12:03:15,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2020-10-28 12:03:15,395 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:03:15,395 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 12:03:15,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 12:03:15,396 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:03:15,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:03:15,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1337539814, now seen corresponding path program 1 times [2020-10-28 12:03:15,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:03:15,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1039605015] [2020-10-28 12:03:15,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:03:15,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:03:15,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:03:15,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:03:16,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:03:16,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 285 [2020-10-28 12:03:16,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 12:03:16,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 960 [2020-10-28 12:03:16,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:03:16,433 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:03:16,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:03:16,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 212 [2020-10-28 12:03:16,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-28 12:03:16,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:03:16,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:03:16,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:03:16,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:03:16,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:03:16,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:03:16,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:03:16,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 12:03:16,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:03:16,597 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:03:16,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:03:16,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:03:16,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:03:16,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:03:16,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:03:16,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:03:16,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:03:16,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:03:16,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-28 12:03:16,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:03:16,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-10-28 12:03:16,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:03:16,677 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:03:16,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:03:16,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:03:16,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:03:16,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:03:16,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-10-28 12:03:16,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:03:16,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:03:16,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:03:16,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-28 12:03:16,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:03:16,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 89 [2020-10-28 12:03:16,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:03:16,838 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:03:16,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:03:16,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:03:16,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-28 12:03:16,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:03:16,996 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 127 proven. 2 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-28 12:03:16,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1039605015] [2020-10-28 12:03:16,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:03:16,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 12:03:16,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194727721] [2020-10-28 12:03:16,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 12:03:16,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:03:16,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 12:03:16,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 12:03:16,999 INFO L87 Difference]: Start difference. First operand 4755 states and 6148 transitions. Second operand 5 states. [2020-10-28 12:03:19,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:03:19,896 INFO L93 Difference]: Finished difference Result 10138 states and 13488 transitions. [2020-10-28 12:03:19,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 12:03:19,897 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 271 [2020-10-28 12:03:19,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:03:19,925 INFO L225 Difference]: With dead ends: 10138 [2020-10-28 12:03:19,925 INFO L226 Difference]: Without dead ends: 5767 [2020-10-28 12:03:19,937 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 12:03:19,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5767 states. [2020-10-28 12:03:20,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5767 to 5727. [2020-10-28 12:03:20,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5727 states. [2020-10-28 12:03:20,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5727 states to 5727 states and 7576 transitions. [2020-10-28 12:03:20,112 INFO L78 Accepts]: Start accepts. Automaton has 5727 states and 7576 transitions. Word has length 271 [2020-10-28 12:03:20,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:03:20,114 INFO L481 AbstractCegarLoop]: Abstraction has 5727 states and 7576 transitions. [2020-10-28 12:03:20,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 12:03:20,114 INFO L276 IsEmpty]: Start isEmpty. Operand 5727 states and 7576 transitions. [2020-10-28 12:03:20,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2020-10-28 12:03:20,123 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:03:20,124 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 12:03:20,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 12:03:20,124 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:03:20,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:03:20,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1336217677, now seen corresponding path program 1 times [2020-10-28 12:03:20,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:03:20,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [23400913] [2020-10-28 12:03:20,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:03:20,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:03:20,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:03:20,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:03:20,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:03:22,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:03:22,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 285 [2020-10-28 12:03:22,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 12:03:22,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2570 [2020-10-28 12:03:22,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:03:22,776 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:03:22,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:03:22,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 140 [2020-10-28 12:03:22,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-28 12:03:22,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:03:22,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:03:22,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:03:22,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:03:22,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:03:22,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:03:22,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:03:22,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 12:03:22,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:03:22,910 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:03:22,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:03:22,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:03:22,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:03:22,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:03:22,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:03:22,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:03:22,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:03:23,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:03:23,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-28 12:03:23,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:03:23,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 132 [2020-10-28 12:03:23,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:03:23,097 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:03:23,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:03:23,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:03:23,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-10-28 12:03:23,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:03:23,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-10-28 12:03:23,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:03:23,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:03:23,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:03:23,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-28 12:03:23,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:03:23,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 100 [2020-10-28 12:03:23,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:03:23,267 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:03:23,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:03:23,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:03:23,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-28 12:03:23,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:03:23,376 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 192 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 12:03:23,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [23400913] [2020-10-28 12:03:23,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:03:23,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 12:03:23,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368852176] [2020-10-28 12:03:23,382 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 12:03:23,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:03:23,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 12:03:23,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:03:23,384 INFO L87 Difference]: Start difference. First operand 5727 states and 7576 transitions. Second operand 7 states. [2020-10-28 12:03:27,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:03:27,974 INFO L93 Difference]: Finished difference Result 14232 states and 19844 transitions. [2020-10-28 12:03:27,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 12:03:27,975 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 271 [2020-10-28 12:03:27,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:03:28,022 INFO L225 Difference]: With dead ends: 14232 [2020-10-28 12:03:28,022 INFO L226 Difference]: Without dead ends: 8889 [2020-10-28 12:03:28,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 12:03:28,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8889 states. [2020-10-28 12:03:28,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8889 to 8477. [2020-10-28 12:03:28,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8477 states. [2020-10-28 12:03:28,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8477 states to 8477 states and 11179 transitions. [2020-10-28 12:03:28,267 INFO L78 Accepts]: Start accepts. Automaton has 8477 states and 11179 transitions. Word has length 271 [2020-10-28 12:03:28,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:03:28,268 INFO L481 AbstractCegarLoop]: Abstraction has 8477 states and 11179 transitions. [2020-10-28 12:03:28,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 12:03:28,268 INFO L276 IsEmpty]: Start isEmpty. Operand 8477 states and 11179 transitions. [2020-10-28 12:03:28,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2020-10-28 12:03:28,276 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:03:28,277 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 12:03:28,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 12:03:28,277 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:03:28,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:03:28,278 INFO L82 PathProgramCache]: Analyzing trace with hash 623200343, now seen corresponding path program 1 times [2020-10-28 12:03:28,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:03:28,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1768370793] [2020-10-28 12:03:28,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:03:28,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:03:28,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:03:28,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:03:28,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:03:28,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:03:30,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:03:32,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:03:32,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:03:33,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:03:33,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 289 [2020-10-28 12:03:33,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 12:03:33,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 12:03:33,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:03:33,351 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:03:33,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:03:33,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 139 [2020-10-28 12:03:33,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 12:03:33,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:03:33,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:03:33,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:03:33,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:03:33,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:03:33,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:03:33,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:03:33,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 12:03:33,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:03:33,443 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:03:33,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:03:33,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:03:33,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:03:33,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:03:33,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:03:33,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:03:33,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:03:33,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:03:33,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-28 12:03:33,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:03:33,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 84 [2020-10-28 12:03:33,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:03:33,569 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:03:33,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:03:33,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 124 [2020-10-28 12:03:33,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 12:03:33,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:03:33,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-10-28 12:03:33,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:03:33,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:03:33,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:03:33,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 12:03:33,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:03:33,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-28 12:03:33,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:03:33,676 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:03:33,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:03:33,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-28 12:03:33,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:03:33,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:03:33,744 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 126 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-10-28 12:03:33,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1768370793] [2020-10-28 12:03:33,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:03:33,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 12:03:33,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261130331] [2020-10-28 12:03:33,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 12:03:33,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:03:33,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 12:03:33,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 12:03:33,746 INFO L87 Difference]: Start difference. First operand 8477 states and 11179 transitions. Second operand 5 states. [2020-10-28 12:03:36,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:03:36,271 INFO L93 Difference]: Finished difference Result 13653 states and 18189 transitions. [2020-10-28 12:03:36,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 12:03:36,273 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 275 [2020-10-28 12:03:36,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:03:36,294 INFO L225 Difference]: With dead ends: 13653 [2020-10-28 12:03:36,294 INFO L226 Difference]: Without dead ends: 7117 [2020-10-28 12:03:36,308 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 12:03:36,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7117 states. [2020-10-28 12:03:36,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7117 to 6912. [2020-10-28 12:03:36,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6912 states. [2020-10-28 12:03:36,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6912 states to 6912 states and 8517 transitions. [2020-10-28 12:03:36,457 INFO L78 Accepts]: Start accepts. Automaton has 6912 states and 8517 transitions. Word has length 275 [2020-10-28 12:03:36,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:03:36,458 INFO L481 AbstractCegarLoop]: Abstraction has 6912 states and 8517 transitions. [2020-10-28 12:03:36,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 12:03:36,458 INFO L276 IsEmpty]: Start isEmpty. Operand 6912 states and 8517 transitions. [2020-10-28 12:03:36,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2020-10-28 12:03:36,467 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:03:36,467 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 12:03:36,467 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 12:03:36,468 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:03:36,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:03:36,468 INFO L82 PathProgramCache]: Analyzing trace with hash -704486117, now seen corresponding path program 1 times [2020-10-28 12:03:36,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:03:36,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [719818058] [2020-10-28 12:03:36,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:03:36,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:03:36,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:03:36,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:03:36,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 310 [2020-10-28 12:03:36,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:03:36,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 416 [2020-10-28 12:03:36,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:03:36,961 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:03:36,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:03:36,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 140 [2020-10-28 12:03:36,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-28 12:03:36,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:03:37,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:03:37,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:03:37,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:03:37,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:03:37,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:03:37,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:03:37,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 12:03:37,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:03:37,125 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:03:37,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:03:37,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:03:37,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:03:37,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:03:37,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:03:37,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:03:37,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:03:37,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:03:37,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-28 12:03:37,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:03:37,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 114 [2020-10-28 12:03:37,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:03:37,306 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:03:37,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:03:37,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:03:37,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-10-28 12:03:37,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:03:37,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-10-28 12:03:37,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:03:37,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:03:37,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:03:37,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-28 12:03:37,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:03:37,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 107 [2020-10-28 12:03:37,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:03:37,479 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:03:37,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:03:37,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:03:37,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-28 12:03:37,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:03:37,582 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 217 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 12:03:37,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [719818058] [2020-10-28 12:03:37,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:03:37,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 12:03:37,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375447236] [2020-10-28 12:03:37,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 12:03:37,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:03:37,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 12:03:37,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:03:37,585 INFO L87 Difference]: Start difference. First operand 6912 states and 8517 transitions. Second operand 7 states. [2020-10-28 12:03:42,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:03:42,104 INFO L93 Difference]: Finished difference Result 15600 states and 19257 transitions. [2020-10-28 12:03:42,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 12:03:42,105 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 296 [2020-10-28 12:03:42,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:03:42,147 INFO L225 Difference]: With dead ends: 15600 [2020-10-28 12:03:42,147 INFO L226 Difference]: Without dead ends: 9074 [2020-10-28 12:03:42,164 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 12:03:42,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9074 states. [2020-10-28 12:03:42,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9074 to 8271. [2020-10-28 12:03:42,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8271 states. [2020-10-28 12:03:42,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8271 states to 8271 states and 10027 transitions. [2020-10-28 12:03:42,362 INFO L78 Accepts]: Start accepts. Automaton has 8271 states and 10027 transitions. Word has length 296 [2020-10-28 12:03:42,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:03:42,362 INFO L481 AbstractCegarLoop]: Abstraction has 8271 states and 10027 transitions. [2020-10-28 12:03:42,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 12:03:42,363 INFO L276 IsEmpty]: Start isEmpty. Operand 8271 states and 10027 transitions. [2020-10-28 12:03:42,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2020-10-28 12:03:42,372 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:03:42,372 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 12:03:42,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 12:03:42,372 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:03:42,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:03:42,373 INFO L82 PathProgramCache]: Analyzing trace with hash -906565665, now seen corresponding path program 1 times [2020-10-28 12:03:42,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:03:42,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [858364091] [2020-10-28 12:03:42,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:03:42,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:03:42,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:03:42,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:03:43,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:03:44,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:03:44,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 312 [2020-10-28 12:03:44,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 12:03:44,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1636 [2020-10-28 12:03:44,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:03:44,075 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:03:44,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:03:44,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 140 [2020-10-28 12:03:44,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-28 12:03:44,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:03:44,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:03:44,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:03:44,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:03:44,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:03:44,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:03:44,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:03:44,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 12:03:44,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:03:44,200 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:03:44,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:03:44,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:03:44,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:03:44,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:03:44,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:03:44,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:03:44,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:03:44,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:03:44,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-28 12:03:44,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:03:44,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 142 [2020-10-28 12:03:44,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:03:44,390 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:03:44,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:03:44,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:03:44,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-10-28 12:03:44,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:03:44,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-10-28 12:03:44,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:03:44,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:03:44,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:03:44,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-28 12:03:44,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:03:44,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 148 [2020-10-28 12:03:44,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:03:44,602 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:03:44,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:03:44,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:03:44,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-28 12:03:44,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:03:44,742 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 219 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 12:03:44,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [858364091] [2020-10-28 12:03:44,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:03:44,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 12:03:44,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744888310] [2020-10-28 12:03:44,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 12:03:44,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:03:44,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 12:03:44,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:03:44,745 INFO L87 Difference]: Start difference. First operand 8271 states and 10027 transitions. Second operand 7 states. [2020-10-28 12:03:48,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:03:48,347 INFO L93 Difference]: Finished difference Result 18131 states and 22119 transitions. [2020-10-28 12:03:48,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 12:03:48,348 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 298 [2020-10-28 12:03:48,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:03:48,377 INFO L225 Difference]: With dead ends: 18131 [2020-10-28 12:03:48,377 INFO L226 Difference]: Without dead ends: 10248 [2020-10-28 12:03:48,394 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 12:03:48,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10248 states. [2020-10-28 12:03:48,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10248 to 10215. [2020-10-28 12:03:48,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10215 states. [2020-10-28 12:03:48,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10215 states to 10215 states and 12307 transitions. [2020-10-28 12:03:48,653 INFO L78 Accepts]: Start accepts. Automaton has 10215 states and 12307 transitions. Word has length 298 [2020-10-28 12:03:48,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:03:48,654 INFO L481 AbstractCegarLoop]: Abstraction has 10215 states and 12307 transitions. [2020-10-28 12:03:48,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 12:03:48,654 INFO L276 IsEmpty]: Start isEmpty. Operand 10215 states and 12307 transitions. [2020-10-28 12:03:48,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2020-10-28 12:03:48,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:03:48,664 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 12:03:48,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 12:03:48,664 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:03:48,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:03:48,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1633478736, now seen corresponding path program 1 times [2020-10-28 12:03:48,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:03:48,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1331704346] [2020-10-28 12:03:48,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:03:48,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:03:48,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:03:49,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:03:49,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 326 [2020-10-28 12:03:49,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:03:49,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 393 [2020-10-28 12:03:49,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:03:49,130 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:03:49,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:03:49,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 157 [2020-10-28 12:03:49,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-28 12:03:49,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:03:49,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:03:49,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:03:49,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:03:49,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:03:49,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:03:49,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:03:49,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 12:03:49,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:03:49,270 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:03:49,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:03:49,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:03:49,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:03:49,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:03:49,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:03:49,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:03:49,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:03:49,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:03:49,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-28 12:03:49,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:03:49,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 130 [2020-10-28 12:03:49,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:03:49,460 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:03:49,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:03:49,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:03:49,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 142 [2020-10-28 12:03:49,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:03:49,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2020-10-28 12:03:49,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:03:49,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:03:49,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:03:49,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-28 12:03:49,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:03:49,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 102 [2020-10-28 12:03:49,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:03:49,630 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:03:49,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:03:49,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:03:49,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-28 12:03:49,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:03:49,777 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 217 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 12:03:49,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1331704346] [2020-10-28 12:03:49,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:03:49,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 12:03:49,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758484880] [2020-10-28 12:03:49,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 12:03:49,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:03:49,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 12:03:49,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:03:49,779 INFO L87 Difference]: Start difference. First operand 10215 states and 12307 transitions. Second operand 7 states. [2020-10-28 12:03:53,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:03:53,479 INFO L93 Difference]: Finished difference Result 20667 states and 25007 transitions. [2020-10-28 12:03:53,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 12:03:53,480 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 312 [2020-10-28 12:03:53,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:03:53,510 INFO L225 Difference]: With dead ends: 20667 [2020-10-28 12:03:53,511 INFO L226 Difference]: Without dead ends: 10842 [2020-10-28 12:03:53,529 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-28 12:03:53,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10842 states. [2020-10-28 12:03:53,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10842 to 10237. [2020-10-28 12:03:53,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10237 states. [2020-10-28 12:03:53,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10237 states to 10237 states and 12310 transitions. [2020-10-28 12:03:53,744 INFO L78 Accepts]: Start accepts. Automaton has 10237 states and 12310 transitions. Word has length 312 [2020-10-28 12:03:53,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:03:53,745 INFO L481 AbstractCegarLoop]: Abstraction has 10237 states and 12310 transitions. [2020-10-28 12:03:53,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 12:03:53,745 INFO L276 IsEmpty]: Start isEmpty. Operand 10237 states and 12310 transitions. [2020-10-28 12:03:53,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2020-10-28 12:03:53,757 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:03:53,757 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 12:03:53,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 12:03:53,757 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:03:53,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:03:53,758 INFO L82 PathProgramCache]: Analyzing trace with hash -263984286, now seen corresponding path program 1 times [2020-10-28 12:03:53,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:03:53,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [776161365] [2020-10-28 12:03:53,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:03:53,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:03:53,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:03:53,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:03:54,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:03:55,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:03:58,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:03:58,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 329 [2020-10-28 12:03:58,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 12:03:58,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4886 [2020-10-28 12:03:58,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:03:58,721 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:03:58,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:03:58,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 181 [2020-10-28 12:03:58,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-28 12:03:58,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:03:58,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:03:58,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:03:58,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:03:58,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:03:58,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:03:58,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:03:58,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 12:03:58,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:03:58,854 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:03:58,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:03:58,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:03:58,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:03:58,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:03:58,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:03:58,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:03:58,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:03:59,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:03:59,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 172 [2020-10-28 12:03:59,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:03:59,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 102 [2020-10-28 12:03:59,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:03:59,014 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:03:59,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:03:59,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:03:59,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 166 [2020-10-28 12:03:59,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:03:59,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2020-10-28 12:03:59,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:03:59,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:03:59,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:03:59,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 12:03:59,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:03:59,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 74 [2020-10-28 12:03:59,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:03:59,144 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:03:59,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:03:59,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:03:59,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-28 12:03:59,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:03:59,314 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 196 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 12:03:59,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [776161365] [2020-10-28 12:03:59,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:03:59,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 12:03:59,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260631341] [2020-10-28 12:03:59,316 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 12:03:59,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:03:59,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 12:03:59,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:03:59,316 INFO L87 Difference]: Start difference. First operand 10237 states and 12310 transitions. Second operand 7 states. [2020-10-28 12:04:02,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:04:02,791 INFO L93 Difference]: Finished difference Result 20876 states and 25246 transitions. [2020-10-28 12:04:02,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 12:04:02,792 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 315 [2020-10-28 12:04:02,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:04:02,819 INFO L225 Difference]: With dead ends: 20876 [2020-10-28 12:04:02,819 INFO L226 Difference]: Without dead ends: 10833 [2020-10-28 12:04:02,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-28 12:04:02,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10833 states. [2020-10-28 12:04:03,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10833 to 10611. [2020-10-28 12:04:03,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10611 states. [2020-10-28 12:04:03,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10611 states to 10611 states and 12693 transitions. [2020-10-28 12:04:03,054 INFO L78 Accepts]: Start accepts. Automaton has 10611 states and 12693 transitions. Word has length 315 [2020-10-28 12:04:03,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:04:03,054 INFO L481 AbstractCegarLoop]: Abstraction has 10611 states and 12693 transitions. [2020-10-28 12:04:03,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 12:04:03,055 INFO L276 IsEmpty]: Start isEmpty. Operand 10611 states and 12693 transitions. [2020-10-28 12:04:03,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2020-10-28 12:04:03,068 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:04:03,068 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 12:04:03,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 12:04:03,069 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:04:03,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:04:03,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1167843116, now seen corresponding path program 1 times [2020-10-28 12:04:03,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:04:03,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [789537660] [2020-10-28 12:04:03,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:04:03,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:04:03,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:04:03,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:04:03,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:04:05,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:04:08,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:04:08,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 361 [2020-10-28 12:04:08,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 12:04:08,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 12:04:08,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:04:08,163 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:04:08,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:04:08,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 213 [2020-10-28 12:04:08,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-28 12:04:08,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:04:08,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:04:08,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:04:08,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:04:08,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:04:08,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:04:08,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:04:08,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 12:04:08,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:04:08,341 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:04:08,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:04:08,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:04:08,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:04:08,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:04:08,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:04:08,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:04:08,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:04:08,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:04:08,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-28 12:04:08,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:04:08,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-28 12:04:08,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:04:08,419 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:04:08,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:04:08,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:04:08,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:04:08,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:04:08,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-10-28 12:04:08,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:04:08,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:04:08,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:04:08,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-28 12:04:08,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:04:08,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 73 [2020-10-28 12:04:08,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:04:08,548 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:04:08,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:04:08,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:04:08,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-28 12:04:08,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:04:08,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2020-10-28 12:04:08,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:04:08,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:04:08,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:04:08,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 12:04:08,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:04:08,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 109 [2020-10-28 12:04:08,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:04:08,698 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:04:08,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:04:08,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:04:08,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-28 12:04:08,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:04:08,908 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 331 proven. 2 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2020-10-28 12:04:08,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [789537660] [2020-10-28 12:04:08,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:04:08,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 12:04:08,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474029032] [2020-10-28 12:04:08,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 12:04:08,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:04:08,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 12:04:08,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:04:08,911 INFO L87 Difference]: Start difference. First operand 10611 states and 12693 transitions. Second operand 7 states. [2020-10-28 12:04:12,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:04:12,638 INFO L93 Difference]: Finished difference Result 21618 states and 25984 transitions. [2020-10-28 12:04:12,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 12:04:12,639 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 345 [2020-10-28 12:04:12,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:04:12,669 INFO L225 Difference]: With dead ends: 21618 [2020-10-28 12:04:12,669 INFO L226 Difference]: Without dead ends: 11203 [2020-10-28 12:04:12,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 12:04:12,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11203 states. [2020-10-28 12:04:12,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11203 to 11175. [2020-10-28 12:04:12,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11175 states. [2020-10-28 12:04:12,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11175 states to 11175 states and 13323 transitions. [2020-10-28 12:04:12,921 INFO L78 Accepts]: Start accepts. Automaton has 11175 states and 13323 transitions. Word has length 345 [2020-10-28 12:04:12,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:04:12,922 INFO L481 AbstractCegarLoop]: Abstraction has 11175 states and 13323 transitions. [2020-10-28 12:04:12,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 12:04:12,922 INFO L276 IsEmpty]: Start isEmpty. Operand 11175 states and 13323 transitions. [2020-10-28 12:04:12,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2020-10-28 12:04:12,933 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:04:12,933 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 12:04:12,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 12:04:12,934 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:04:12,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:04:12,934 INFO L82 PathProgramCache]: Analyzing trace with hash 2010853473, now seen corresponding path program 1 times [2020-10-28 12:04:12,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:04:12,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1545080073] [2020-10-28 12:04:12,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:04:13,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:04:13,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:04:13,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:04:14,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:04:15,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:04:15,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 372 [2020-10-28 12:04:15,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 12:04:15,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2455 [2020-10-28 12:04:15,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:04:15,473 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:04:15,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:04:15,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 224 [2020-10-28 12:04:15,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-28 12:04:15,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:04:15,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:04:15,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:04:15,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:04:15,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:04:15,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:04:15,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:04:15,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 12:04:15,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:04:15,641 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:04:15,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:04:15,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:04:15,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:04:15,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:04:15,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:04:15,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:04:15,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:04:15,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:04:15,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-28 12:04:15,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:04:15,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-28 12:04:15,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:04:15,706 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:04:15,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:04:15,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:04:15,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:04:15,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:04:15,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-10-28 12:04:15,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:04:15,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:04:15,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:04:15,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 12:04:15,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:04:15,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-10-28 12:04:15,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:04:15,801 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:04:15,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:04:15,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:04:15,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-28 12:04:15,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:04:15,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 220 [2020-10-28 12:04:15,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:04:15,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:04:15,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:04:15,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 12:04:15,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:04:15,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 86 [2020-10-28 12:04:15,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:04:15,962 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:04:15,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:04:15,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:04:15,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-28 12:04:15,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:04:16,151 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 334 proven. 2 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2020-10-28 12:04:16,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1545080073] [2020-10-28 12:04:16,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:04:16,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 12:04:16,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132244489] [2020-10-28 12:04:16,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 12:04:16,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:04:16,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 12:04:16,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 12:04:16,154 INFO L87 Difference]: Start difference. First operand 11175 states and 13323 transitions. Second operand 8 states. [2020-10-28 12:04:21,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:04:21,404 INFO L93 Difference]: Finished difference Result 20826 states and 25102 transitions. [2020-10-28 12:04:21,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 12:04:21,405 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 356 [2020-10-28 12:04:21,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:04:21,430 INFO L225 Difference]: With dead ends: 20826 [2020-10-28 12:04:21,430 INFO L226 Difference]: Without dead ends: 12161 [2020-10-28 12:04:21,443 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-28 12:04:21,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12161 states. [2020-10-28 12:04:21,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12161 to 11941. [2020-10-28 12:04:21,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11941 states. [2020-10-28 12:04:21,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11941 states to 11941 states and 14216 transitions. [2020-10-28 12:04:21,682 INFO L78 Accepts]: Start accepts. Automaton has 11941 states and 14216 transitions. Word has length 356 [2020-10-28 12:04:21,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:04:21,683 INFO L481 AbstractCegarLoop]: Abstraction has 11941 states and 14216 transitions. [2020-10-28 12:04:21,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 12:04:21,683 INFO L276 IsEmpty]: Start isEmpty. Operand 11941 states and 14216 transitions. [2020-10-28 12:04:21,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2020-10-28 12:04:21,695 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:04:21,695 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 12:04:21,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 12:04:21,695 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:04:21,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:04:21,696 INFO L82 PathProgramCache]: Analyzing trace with hash 971983455, now seen corresponding path program 1 times [2020-10-28 12:04:21,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:04:21,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [35319509] [2020-10-28 12:04:21,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:04:21,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:04:21,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:04:22,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:04:22,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:04:23,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:04:23,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 369 [2020-10-28 12:04:23,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 12:04:23,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1709 [2020-10-28 12:04:23,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:04:23,492 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:04:23,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:04:23,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 140 [2020-10-28 12:04:23,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 157 [2020-10-28 12:04:23,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:04:23,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:04:23,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:04:23,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:04:23,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:04:23,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:04:23,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:04:23,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 12:04:23,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:04:23,632 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:04:23,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:04:23,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:04:23,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:04:23,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:04:23,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:04:23,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:04:23,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:04:23,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:04:23,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-28 12:04:23,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:04:23,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-10-28 12:04:23,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:04:23,746 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:04:23,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:04:23,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:04:23,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-10-28 12:04:23,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:04:23,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-10-28 12:04:23,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:04:23,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:04:24,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:04:24,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-28 12:04:24,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:04:24,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 225 [2020-10-28 12:04:24,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:04:24,033 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:04:24,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:04:24,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:04:24,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 154 [2020-10-28 12:04:24,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:04:24,263 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 252 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 12:04:24,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [35319509] [2020-10-28 12:04:24,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:04:24,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 12:04:24,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777961883] [2020-10-28 12:04:24,265 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 12:04:24,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:04:24,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 12:04:24,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:04:24,266 INFO L87 Difference]: Start difference. First operand 11941 states and 14216 transitions. Second operand 7 states. [2020-10-28 12:04:28,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:04:28,296 INFO L93 Difference]: Finished difference Result 24136 states and 28722 transitions. [2020-10-28 12:04:28,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 12:04:28,298 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 355 [2020-10-28 12:04:28,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:04:28,319 INFO L225 Difference]: With dead ends: 24136 [2020-10-28 12:04:28,319 INFO L226 Difference]: Without dead ends: 12391 [2020-10-28 12:04:28,333 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 12:04:28,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12391 states. [2020-10-28 12:04:28,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12391 to 12351. [2020-10-28 12:04:28,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12351 states. [2020-10-28 12:04:28,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12351 states to 12351 states and 14551 transitions. [2020-10-28 12:04:28,572 INFO L78 Accepts]: Start accepts. Automaton has 12351 states and 14551 transitions. Word has length 355 [2020-10-28 12:04:28,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:04:28,573 INFO L481 AbstractCegarLoop]: Abstraction has 12351 states and 14551 transitions. [2020-10-28 12:04:28,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 12:04:28,573 INFO L276 IsEmpty]: Start isEmpty. Operand 12351 states and 14551 transitions. [2020-10-28 12:04:28,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2020-10-28 12:04:28,585 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:04:28,585 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 12:04:28,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 12:04:28,586 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:04:28,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:04:28,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1687515223, now seen corresponding path program 1 times [2020-10-28 12:04:28,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:04:28,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1604058263] [2020-10-28 12:04:28,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:04:28,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:04:28,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:04:28,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:04:28,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:04:29,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:04:29,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:04:29,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 375 [2020-10-28 12:04:29,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 12:04:29,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 684 [2020-10-28 12:04:29,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:04:29,359 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:04:29,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:04:29,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 12:04:29,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 297 [2020-10-28 12:04:29,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:04:29,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:04:29,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:04:29,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:04:29,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:04:29,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:04:29,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:04:29,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 12:04:29,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:04:29,497 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:04:29,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:04:29,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:04:29,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 12:04:29,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:04:29,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:04:29,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:04:29,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:04:29,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:04:29,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:04:29,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-28 12:04:29,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 12:04:29,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 98 [2020-10-28 12:04:29,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:04:29,638 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:04:29,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:04:29,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:04:29,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 129 [2020-10-28 12:04:29,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:04:29,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-10-28 12:04:29,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:04:29,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:04:29,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:04:29,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:04:29,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-10-28 12:04:29,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 12:04:29,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 121 [2020-10-28 12:04:29,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:04:29,886 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:04:29,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:04:29,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 153 [2020-10-28 12:04:29,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 12:04:29,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:04:29,985 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 129 proven. 0 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-10-28 12:04:29,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1604058263] [2020-10-28 12:04:29,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 12:04:29,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 12:04:29,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308055472] [2020-10-28 12:04:29,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 12:04:29,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:04:29,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 12:04:29,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 12:04:29,988 INFO L87 Difference]: Start difference. First operand 12351 states and 14551 transitions. Second operand 6 states. [2020-10-28 12:04:32,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:04:32,366 INFO L93 Difference]: Finished difference Result 22024 states and 26012 transitions. [2020-10-28 12:04:32,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 12:04:32,366 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 361 [2020-10-28 12:04:32,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:04:32,385 INFO L225 Difference]: With dead ends: 22024 [2020-10-28 12:04:32,385 INFO L226 Difference]: Without dead ends: 12185 [2020-10-28 12:04:32,399 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:04:32,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12185 states. [2020-10-28 12:04:32,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12185 to 12144. [2020-10-28 12:04:32,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12144 states. [2020-10-28 12:04:32,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12144 states to 12144 states and 14253 transitions. [2020-10-28 12:04:32,608 INFO L78 Accepts]: Start accepts. Automaton has 12144 states and 14253 transitions. Word has length 361 [2020-10-28 12:04:32,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:04:32,609 INFO L481 AbstractCegarLoop]: Abstraction has 12144 states and 14253 transitions. [2020-10-28 12:04:32,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 12:04:32,609 INFO L276 IsEmpty]: Start isEmpty. Operand 12144 states and 14253 transitions. [2020-10-28 12:04:32,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2020-10-28 12:04:32,620 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:04:32,620 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 12:04:32,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 12:04:32,621 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:04:32,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:04:32,621 INFO L82 PathProgramCache]: Analyzing trace with hash -663423689, now seen corresponding path program 1 times [2020-10-28 12:04:32,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:04:32,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [768797664] [2020-10-28 12:04:32,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:04:32,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:04:32,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:04:32,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:04:34,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:04:34,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 381 [2020-10-28 12:04:34,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 12:04:34,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1371 [2020-10-28 12:04:34,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:04:34,076 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:04:34,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:04:34,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 212 [2020-10-28 12:04:34,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-28 12:04:34,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:04:34,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:04:34,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:04:34,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:04:34,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:04:34,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:04:34,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:04:34,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 12:04:34,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:04:34,210 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:04:34,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:04:34,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:04:34,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:04:34,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:04:34,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:04:34,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:04:34,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:04:34,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:04:34,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-28 12:04:34,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:04:34,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-28 12:04:34,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:04:34,265 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:04:34,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:04:34,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:04:34,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:04:34,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:04:34,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-10-28 12:04:34,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:04:34,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:04:34,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:04:34,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-28 12:04:34,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:04:34,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-10-28 12:04:34,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:04:34,353 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:04:34,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:04:34,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:04:34,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-28 12:04:34,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:04:34,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2020-10-28 12:04:34,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:04:34,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:04:34,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:04:34,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-28 12:04:34,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:04:34,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 91 [2020-10-28 12:04:34,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:04:34,474 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:04:34,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:04:34,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:04:34,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-28 12:04:34,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:04:34,592 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 366 proven. 2 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2020-10-28 12:04:34,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [768797664] [2020-10-28 12:04:34,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:04:34,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 12:04:34,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515453684] [2020-10-28 12:04:34,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 12:04:34,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:04:34,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 12:04:34,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:04:34,594 INFO L87 Difference]: Start difference. First operand 12144 states and 14253 transitions. Second operand 7 states. [2020-10-28 12:04:38,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:04:38,969 INFO L93 Difference]: Finished difference Result 24537 states and 28816 transitions. [2020-10-28 12:04:38,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 12:04:38,970 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 365 [2020-10-28 12:04:38,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:04:38,987 INFO L225 Difference]: With dead ends: 24537 [2020-10-28 12:04:38,987 INFO L226 Difference]: Without dead ends: 12589 [2020-10-28 12:04:38,999 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 12:04:39,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12589 states. [2020-10-28 12:04:39,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12589 to 12538. [2020-10-28 12:04:39,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12538 states. [2020-10-28 12:04:39,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12538 states to 12538 states and 14438 transitions. [2020-10-28 12:04:39,209 INFO L78 Accepts]: Start accepts. Automaton has 12538 states and 14438 transitions. Word has length 365 [2020-10-28 12:04:39,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:04:39,210 INFO L481 AbstractCegarLoop]: Abstraction has 12538 states and 14438 transitions. [2020-10-28 12:04:39,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 12:04:39,210 INFO L276 IsEmpty]: Start isEmpty. Operand 12538 states and 14438 transitions. [2020-10-28 12:04:39,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2020-10-28 12:04:39,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:04:39,226 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 12:04:39,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 12:04:39,226 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:04:39,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:04:39,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1332685175, now seen corresponding path program 1 times [2020-10-28 12:04:39,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:04:39,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1984641191] [2020-10-28 12:04:39,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:04:39,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:04:39,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:04:39,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:04:41,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:04:41,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 391 [2020-10-28 12:04:41,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 12:04:41,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1998 [2020-10-28 12:04:41,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:04:41,318 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:04:41,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 12:04:41,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 12:04:41,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 382 [2020-10-28 12:04:41,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:04:41,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:04:41,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:04:41,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:04:41,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:04:41,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:04:41,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:04:41,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 12:04:41,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:04:41,513 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:04:41,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:04:41,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:04:41,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 12:04:41,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:04:41,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:04:41,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:04:41,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:04:41,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:04:41,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-28 12:04:41,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:04:41,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 144 [2020-10-28 12:04:41,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:04:41,707 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:04:41,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 12:04:41,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:04:41,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 132 [2020-10-28 12:04:41,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:04:41,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-10-28 12:04:41,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:04:41,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:04:42,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:04:42,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 176 [2020-10-28 12:04:42,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:04:42,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 208 [2020-10-28 12:04:42,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:04:42,018 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:04:42,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 12:04:42,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:04:42,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 176 [2020-10-28 12:04:42,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:04:42,347 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 4 proven. 250 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 12:04:42,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1984641191] [2020-10-28 12:04:42,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:04:42,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 12:04:42,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850604888] [2020-10-28 12:04:42,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 12:04:42,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:04:42,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 12:04:42,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-28 12:04:42,349 INFO L87 Difference]: Start difference. First operand 12538 states and 14438 transitions. Second operand 11 states. [2020-10-28 12:04:50,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:04:50,410 INFO L93 Difference]: Finished difference Result 31624 states and 38282 transitions. [2020-10-28 12:04:50,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 12:04:50,411 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 377 [2020-10-28 12:04:50,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:04:50,480 INFO L225 Difference]: With dead ends: 31624 [2020-10-28 12:04:50,480 INFO L226 Difference]: Without dead ends: 21598 [2020-10-28 12:04:50,503 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=150, Invalid=402, Unknown=0, NotChecked=0, Total=552 [2020-10-28 12:04:50,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21598 states. [2020-10-28 12:04:51,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21598 to 19757. [2020-10-28 12:04:51,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19757 states. [2020-10-28 12:04:51,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19757 states to 19757 states and 22887 transitions. [2020-10-28 12:04:51,092 INFO L78 Accepts]: Start accepts. Automaton has 19757 states and 22887 transitions. Word has length 377 [2020-10-28 12:04:51,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:04:51,093 INFO L481 AbstractCegarLoop]: Abstraction has 19757 states and 22887 transitions. [2020-10-28 12:04:51,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 12:04:51,093 INFO L276 IsEmpty]: Start isEmpty. Operand 19757 states and 22887 transitions. [2020-10-28 12:04:51,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2020-10-28 12:04:51,106 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:04:51,108 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 12:04:51,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 12:04:51,108 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:04:51,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:04:51,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1149925717, now seen corresponding path program 1 times [2020-10-28 12:04:51,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:04:51,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [746954299] [2020-10-28 12:04:51,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:04:51,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:04:51,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:04:51,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:04:52,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:04:52,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 408 [2020-10-28 12:04:52,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 12:04:52,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1040 [2020-10-28 12:04:52,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:04:52,250 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:04:52,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:04:52,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 239 [2020-10-28 12:04:52,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-28 12:04:52,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:04:52,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:04:52,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:04:52,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:04:52,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:04:52,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:04:52,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:04:52,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 12:04:52,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:04:52,433 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:04:52,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:04:52,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:04:52,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:04:52,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:04:52,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:04:52,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:04:52,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:04:52,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:04:52,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-28 12:04:52,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:04:52,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-28 12:04:52,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:04:52,504 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:04:52,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:04:52,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:04:52,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:04:52,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:04:52,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-10-28 12:04:52,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:04:52,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:04:52,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:04:52,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-28 12:04:52,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:04:52,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-10-28 12:04:52,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:04:52,607 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:04:52,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:04:52,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:04:52,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-28 12:04:52,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:04:52,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 235 [2020-10-28 12:04:52,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:04:52,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:04:52,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:04:52,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-28 12:04:52,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:04:52,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 94 [2020-10-28 12:04:52,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:04:52,743 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:04:52,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:04:52,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:04:52,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-28 12:04:52,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:04:52,977 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 376 proven. 2 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-28 12:04:52,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [746954299] [2020-10-28 12:04:52,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:04:52,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 12:04:52,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136217222] [2020-10-28 12:04:52,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 12:04:52,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:04:52,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 12:04:52,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:04:52,980 INFO L87 Difference]: Start difference. First operand 19757 states and 22887 transitions. Second operand 7 states. [2020-10-28 12:04:58,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:04:58,047 INFO L93 Difference]: Finished difference Result 37228 states and 43216 transitions. [2020-10-28 12:04:58,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 12:04:58,048 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 392 [2020-10-28 12:04:58,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:04:58,089 INFO L225 Difference]: With dead ends: 37228 [2020-10-28 12:04:58,089 INFO L226 Difference]: Without dead ends: 19640 [2020-10-28 12:04:58,107 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-28 12:04:58,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19640 states. [2020-10-28 12:04:58,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19640 to 19558. [2020-10-28 12:04:58,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19558 states. [2020-10-28 12:04:58,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19558 states to 19558 states and 22541 transitions. [2020-10-28 12:04:58,443 INFO L78 Accepts]: Start accepts. Automaton has 19558 states and 22541 transitions. Word has length 392 [2020-10-28 12:04:58,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:04:58,444 INFO L481 AbstractCegarLoop]: Abstraction has 19558 states and 22541 transitions. [2020-10-28 12:04:58,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 12:04:58,444 INFO L276 IsEmpty]: Start isEmpty. Operand 19558 states and 22541 transitions. [2020-10-28 12:04:58,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 405 [2020-10-28 12:04:58,457 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:04:58,458 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 12:04:58,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 12:04:58,458 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:04:58,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:04:58,459 INFO L82 PathProgramCache]: Analyzing trace with hash 89092815, now seen corresponding path program 1 times [2020-10-28 12:04:58,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:04:58,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1070749088] [2020-10-28 12:04:58,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:04:58,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:04:58,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:04:58,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:05:00,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:05:02,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:05:02,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 420 [2020-10-28 12:05:02,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 12:05:02,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3758 [2020-10-28 12:05:02,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:05:02,292 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:05:02,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:05:02,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 347 [2020-10-28 12:05:02,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-28 12:05:02,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:05:02,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:05:02,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:05:02,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:05:02,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:05:02,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:05:02,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:05:02,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 12:05:02,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:05:02,485 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:05:02,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:05:02,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:05:02,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:05:02,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:05:02,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:05:02,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:05:02,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:05:02,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:05:02,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-28 12:05:02,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:05:02,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-28 12:05:02,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:05:02,567 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:05:02,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:05:02,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:05:02,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:05:02,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:05:02,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-10-28 12:05:02,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:05:02,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:05:02,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:05:02,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 12:05:02,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:05:02,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 12:05:02,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:05:02,614 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:05:02,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:05:02,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:05:02,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:05:02,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:05:02,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 220 [2020-10-28 12:05:02,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:05:02,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:05:02,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:05:02,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-28 12:05:02,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:05:02,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-10-28 12:05:02,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:05:02,724 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:05:02,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:05:02,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:05:02,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-28 12:05:02,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:05:02,833 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 192 proven. 3 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2020-10-28 12:05:02,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1070749088] [2020-10-28 12:05:02,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:05:02,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 12:05:02,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892100913] [2020-10-28 12:05:02,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 12:05:02,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:05:02,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 12:05:02,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 12:05:02,835 INFO L87 Difference]: Start difference. First operand 19558 states and 22541 transitions. Second operand 5 states. [2020-10-28 12:05:06,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:05:06,278 INFO L93 Difference]: Finished difference Result 39966 states and 45964 transitions. [2020-10-28 12:05:06,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 12:05:06,280 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 404 [2020-10-28 12:05:06,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:05:06,323 INFO L225 Difference]: With dead ends: 39966 [2020-10-28 12:05:06,323 INFO L226 Difference]: Without dead ends: 20604 [2020-10-28 12:05:06,346 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 12:05:06,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20604 states. [2020-10-28 12:05:06,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20604 to 19390. [2020-10-28 12:05:06,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19390 states. [2020-10-28 12:05:06,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19390 states to 19390 states and 21982 transitions. [2020-10-28 12:05:06,717 INFO L78 Accepts]: Start accepts. Automaton has 19390 states and 21982 transitions. Word has length 404 [2020-10-28 12:05:06,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:05:06,718 INFO L481 AbstractCegarLoop]: Abstraction has 19390 states and 21982 transitions. [2020-10-28 12:05:06,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 12:05:06,718 INFO L276 IsEmpty]: Start isEmpty. Operand 19390 states and 21982 transitions. [2020-10-28 12:05:06,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2020-10-28 12:05:06,735 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:05:06,735 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 12:05:06,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 12:05:06,736 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:05:06,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:05:06,736 INFO L82 PathProgramCache]: Analyzing trace with hash 736561202, now seen corresponding path program 1 times [2020-10-28 12:05:06,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:05:06,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1650238985] [2020-10-28 12:05:06,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:05:06,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:05:06,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:05:07,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:05:07,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:05:09,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:05:09,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 450 [2020-10-28 12:05:09,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 12:05:09,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2458 [2020-10-28 12:05:09,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:05:09,293 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:05:09,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:05:09,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 281 [2020-10-28 12:05:09,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-28 12:05:09,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:05:09,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:05:09,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:05:09,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:05:09,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:05:09,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:05:09,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:05:09,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 12:05:09,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:05:09,474 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:05:09,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:05:09,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:05:09,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:05:09,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:05:09,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:05:09,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:05:09,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:05:09,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:05:09,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-28 12:05:09,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:05:09,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-28 12:05:09,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:05:09,534 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:05:09,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:05:09,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:05:09,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:05:09,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:05:09,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-10-28 12:05:09,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:05:09,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:05:09,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:05:09,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-28 12:05:09,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:05:09,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 79 [2020-10-28 12:05:09,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:05:09,660 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:05:09,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:05:09,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:05:09,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 133 [2020-10-28 12:05:09,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:05:09,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 277 [2020-10-28 12:05:09,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:05:09,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:05:09,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:05:09,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-28 12:05:09,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:05:09,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 105 [2020-10-28 12:05:09,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:05:09,824 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:05:09,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:05:09,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:05:09,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-28 12:05:09,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:05:10,328 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 376 proven. 2 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2020-10-28 12:05:10,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1650238985] [2020-10-28 12:05:10,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:05:10,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 12:05:10,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538561840] [2020-10-28 12:05:10,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 12:05:10,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:05:10,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 12:05:10,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:05:10,331 INFO L87 Difference]: Start difference. First operand 19390 states and 21982 transitions. Second operand 7 states. [2020-10-28 12:05:15,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:05:15,312 INFO L93 Difference]: Finished difference Result 36508 states and 41431 transitions. [2020-10-28 12:05:15,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 12:05:15,313 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 434 [2020-10-28 12:05:15,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:05:15,344 INFO L225 Difference]: With dead ends: 36508 [2020-10-28 12:05:15,345 INFO L226 Difference]: Without dead ends: 19671 [2020-10-28 12:05:15,363 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-28 12:05:15,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19671 states. [2020-10-28 12:05:15,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19671 to 19390. [2020-10-28 12:05:15,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19390 states. [2020-10-28 12:05:15,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19390 states to 19390 states and 21935 transitions. [2020-10-28 12:05:15,672 INFO L78 Accepts]: Start accepts. Automaton has 19390 states and 21935 transitions. Word has length 434 [2020-10-28 12:05:15,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:05:15,673 INFO L481 AbstractCegarLoop]: Abstraction has 19390 states and 21935 transitions. [2020-10-28 12:05:15,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 12:05:15,673 INFO L276 IsEmpty]: Start isEmpty. Operand 19390 states and 21935 transitions. [2020-10-28 12:05:15,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 453 [2020-10-28 12:05:15,687 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:05:15,688 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 12:05:15,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 12:05:15,688 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:05:15,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:05:15,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1038289830, now seen corresponding path program 1 times [2020-10-28 12:05:15,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:05:15,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [320613621] [2020-10-28 12:05:15,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:05:15,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:05:15,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:05:15,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:05:16,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:05:17,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:05:18,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:05:18,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 470 [2020-10-28 12:05:18,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 12:05:18,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2353 [2020-10-28 12:05:18,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:05:18,119 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:05:18,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 12:05:18,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 212 [2020-10-28 12:05:18,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 186 [2020-10-28 12:05:18,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:05:18,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:05:18,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:05:18,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:05:18,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:05:18,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:05:18,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:05:18,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 12:05:18,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:05:18,314 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:05:18,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:05:18,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:05:18,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:05:18,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:05:18,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:05:18,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:05:18,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:05:18,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:05:18,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-28 12:05:18,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:05:18,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-28 12:05:18,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:05:18,386 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:05:18,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:05:18,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:05:18,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:05:18,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:05:18,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-10-28 12:05:18,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:05:18,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:05:18,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:05:18,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-28 12:05:18,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:05:18,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 100 [2020-10-28 12:05:18,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:05:18,552 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:05:18,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:05:18,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:05:18,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-28 12:05:18,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:05:18,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2020-10-28 12:05:18,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:05:18,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:05:18,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:05:18,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:05:18,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 12:05:18,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 12:05:18,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 164 [2020-10-28 12:05:18,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:05:18,776 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:05:18,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:05:18,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:05:18,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-28 12:05:18,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:05:18,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 295 [2020-10-28 12:05:18,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:05:18,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:05:18,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:05:18,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-28 12:05:18,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:05:18,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 114 [2020-10-28 12:05:18,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:05:18,986 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:05:18,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:05:18,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:05:18,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-28 12:05:18,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:05:19,282 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 676 proven. 6 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-10-28 12:05:19,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [320613621] [2020-10-28 12:05:19,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:05:19,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 12:05:19,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417179985] [2020-10-28 12:05:19,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 12:05:19,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:05:19,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 12:05:19,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-28 12:05:19,284 INFO L87 Difference]: Start difference. First operand 19390 states and 21935 transitions. Second operand 9 states. [2020-10-28 12:05:22,628 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-10-28 12:05:25,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:05:25,123 INFO L93 Difference]: Finished difference Result 36835 states and 42333 transitions. [2020-10-28 12:05:25,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 12:05:25,124 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 452 [2020-10-28 12:05:25,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:05:25,174 INFO L225 Difference]: With dead ends: 36835 [2020-10-28 12:05:25,174 INFO L226 Difference]: Without dead ends: 19612 [2020-10-28 12:05:25,199 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2020-10-28 12:05:25,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19612 states. [2020-10-28 12:05:25,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19612 to 19380. [2020-10-28 12:05:25,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19380 states. [2020-10-28 12:05:25,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19380 states to 19380 states and 21868 transitions. [2020-10-28 12:05:25,572 INFO L78 Accepts]: Start accepts. Automaton has 19380 states and 21868 transitions. Word has length 452 [2020-10-28 12:05:25,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:05:25,572 INFO L481 AbstractCegarLoop]: Abstraction has 19380 states and 21868 transitions. [2020-10-28 12:05:25,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 12:05:25,573 INFO L276 IsEmpty]: Start isEmpty. Operand 19380 states and 21868 transitions. [2020-10-28 12:05:25,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2020-10-28 12:05:25,586 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:05:25,586 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 12:05:25,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 12:05:25,586 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:05:25,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:05:25,587 INFO L82 PathProgramCache]: Analyzing trace with hash 61334874, now seen corresponding path program 1 times [2020-10-28 12:05:25,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:05:25,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1493173383] [2020-10-28 12:05:25,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:05:25,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:05:25,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:05:25,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:05:27,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:05:29,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:05:29,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 472 [2020-10-28 12:05:29,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 12:05:29,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3824 [2020-10-28 12:05:29,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:05:29,516 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:05:29,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:05:29,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 303 [2020-10-28 12:05:29,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-28 12:05:29,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:05:29,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:05:29,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:05:29,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:05:29,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:05:29,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:05:29,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:05:29,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 12:05:29,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:05:29,683 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:05:29,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:05:29,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:05:29,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:05:29,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:05:29,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:05:29,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:05:29,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:05:29,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:05:29,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-28 12:05:29,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:05:29,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-28 12:05:29,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:05:29,755 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:05:29,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:05:29,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:05:29,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:05:29,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:05:29,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2020-10-28 12:05:29,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:05:29,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:05:29,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:05:29,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-28 12:05:29,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:05:29,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 79 [2020-10-28 12:05:29,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:05:29,900 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:05:29,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:05:29,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:05:29,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 139 [2020-10-28 12:05:29,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:05:29,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 299 [2020-10-28 12:05:29,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:05:29,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:05:30,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:05:30,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-28 12:05:30,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:05:30,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 95 [2020-10-28 12:05:30,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:05:30,055 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:05:30,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:05:30,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:05:30,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-28 12:05:30,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:05:30,255 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 376 proven. 2 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2020-10-28 12:05:30,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1493173383] [2020-10-28 12:05:30,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:05:30,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 12:05:30,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251449284] [2020-10-28 12:05:30,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 12:05:30,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:05:30,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 12:05:30,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:05:30,257 INFO L87 Difference]: Start difference. First operand 19380 states and 21868 transitions. Second operand 7 states. [2020-10-28 12:05:31,122 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-10-28 12:05:34,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:05:34,116 INFO L93 Difference]: Finished difference Result 39793 states and 44888 transitions. [2020-10-28 12:05:34,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 12:05:34,117 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 456 [2020-10-28 12:05:34,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:05:34,146 INFO L225 Difference]: With dead ends: 39793 [2020-10-28 12:05:34,147 INFO L226 Difference]: Without dead ends: 20609 [2020-10-28 12:05:34,167 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-28 12:05:34,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20609 states. [2020-10-28 12:05:34,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20609 to 20144. [2020-10-28 12:05:34,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20144 states. [2020-10-28 12:05:34,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20144 states to 20144 states and 22647 transitions. [2020-10-28 12:05:34,466 INFO L78 Accepts]: Start accepts. Automaton has 20144 states and 22647 transitions. Word has length 456 [2020-10-28 12:05:34,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:05:34,467 INFO L481 AbstractCegarLoop]: Abstraction has 20144 states and 22647 transitions. [2020-10-28 12:05:34,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 12:05:34,467 INFO L276 IsEmpty]: Start isEmpty. Operand 20144 states and 22647 transitions. [2020-10-28 12:05:34,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2020-10-28 12:05:34,482 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:05:34,483 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 12:05:34,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 12:05:34,483 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:05:34,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:05:34,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1748999223, now seen corresponding path program 1 times [2020-10-28 12:05:34,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:05:34,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1889743085] [2020-10-28 12:05:34,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:05:34,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:05:34,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:05:34,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:05:35,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:05:36,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:05:36,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 494 [2020-10-28 12:05:36,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 12:05:36,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2153 [2020-10-28 12:05:36,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:05:36,722 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:05:36,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 12:05:36,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 259 [2020-10-28 12:05:36,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 231 [2020-10-28 12:05:36,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:05:36,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:05:36,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:05:36,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:05:36,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:05:36,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:05:36,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:05:36,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 12:05:36,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:05:36,874 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:05:36,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:05:36,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:05:36,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:05:36,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:05:36,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:05:36,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:05:36,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:05:36,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:05:36,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-28 12:05:36,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:05:36,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-28 12:05:36,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:05:36,944 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:05:36,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:05:36,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:05:36,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:05:36,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:05:36,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-10-28 12:05:37,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:05:37,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:05:37,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:05:37,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-28 12:05:37,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:05:37,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-10-28 12:05:37,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:05:37,080 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:05:37,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:05:37,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:05:37,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 126 [2020-10-28 12:05:37,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:05:37,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 255 [2020-10-28 12:05:37,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:05:37,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:05:37,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:05:37,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-10-28 12:05:37,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:05:37,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 189 [2020-10-28 12:05:37,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:05:37,330 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:05:37,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:05:37,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:05:37,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 161 [2020-10-28 12:05:37,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:05:37,649 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 369 proven. 64 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2020-10-28 12:05:37,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1889743085] [2020-10-28 12:05:37,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:05:37,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 12:05:37,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198845708] [2020-10-28 12:05:37,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 12:05:37,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:05:37,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 12:05:37,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 12:05:37,651 INFO L87 Difference]: Start difference. First operand 20144 states and 22647 transitions. Second operand 6 states. [2020-10-28 12:05:41,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:05:41,137 INFO L93 Difference]: Finished difference Result 39759 states and 44974 transitions. [2020-10-28 12:05:41,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 12:05:41,138 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 478 [2020-10-28 12:05:41,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:05:41,187 INFO L225 Difference]: With dead ends: 39759 [2020-10-28 12:05:41,187 INFO L226 Difference]: Without dead ends: 22354 [2020-10-28 12:05:41,210 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 12:05:41,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22354 states. [2020-10-28 12:05:41,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22354 to 21489. [2020-10-28 12:05:41,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21489 states. [2020-10-28 12:05:41,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21489 states to 21489 states and 24054 transitions. [2020-10-28 12:05:41,558 INFO L78 Accepts]: Start accepts. Automaton has 21489 states and 24054 transitions. Word has length 478 [2020-10-28 12:05:41,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:05:41,559 INFO L481 AbstractCegarLoop]: Abstraction has 21489 states and 24054 transitions. [2020-10-28 12:05:41,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 12:05:41,559 INFO L276 IsEmpty]: Start isEmpty. Operand 21489 states and 24054 transitions. [2020-10-28 12:05:41,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2020-10-28 12:05:41,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:05:41,575 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 12:05:41,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 12:05:41,575 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:05:41,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:05:41,576 INFO L82 PathProgramCache]: Analyzing trace with hash 435791245, now seen corresponding path program 1 times [2020-10-28 12:05:41,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:05:41,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1771267582] [2020-10-28 12:05:41,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:05:41,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:05:41,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:05:42,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:05:42,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:05:46,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:05:46,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 494 [2020-10-28 12:05:46,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 12:05:46,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4366 [2020-10-28 12:05:46,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:05:46,061 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:05:46,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:05:46,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 325 [2020-10-28 12:05:46,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-28 12:05:46,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:05:46,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:05:46,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:05:46,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:05:46,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:05:46,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:05:46,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:05:46,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 12:05:46,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:05:46,216 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:05:46,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:05:46,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:05:46,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:05:46,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:05:46,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:05:46,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:05:46,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:05:46,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:05:46,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-28 12:05:46,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:05:46,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-28 12:05:46,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:05:46,274 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:05:46,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:05:46,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:05:46,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:05:46,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:05:46,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2020-10-28 12:05:46,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:05:46,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:05:46,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:05:46,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-28 12:05:46,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:05:46,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 113 [2020-10-28 12:05:46,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:05:46,446 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:05:46,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:05:46,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:05:46,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 161 [2020-10-28 12:05:46,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:05:46,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 321 [2020-10-28 12:05:46,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:05:46,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:05:46,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:05:46,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-28 12:05:46,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:05:46,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 91 [2020-10-28 12:05:46,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:05:46,592 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:05:46,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:05:46,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:05:46,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-28 12:05:46,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:05:46,921 INFO L134 CoverageAnalysis]: Checked inductivity of 524 backedges. 376 proven. 2 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2020-10-28 12:05:46,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1771267582] [2020-10-28 12:05:46,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:05:46,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 12:05:46,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427340612] [2020-10-28 12:05:46,922 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 12:05:46,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:05:46,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 12:05:46,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:05:46,923 INFO L87 Difference]: Start difference. First operand 21489 states and 24054 transitions. Second operand 7 states. [2020-10-28 12:05:47,771 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-10-28 12:05:50,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:05:50,901 INFO L93 Difference]: Finished difference Result 40523 states and 45400 transitions. [2020-10-28 12:05:50,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 12:05:50,902 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 478 [2020-10-28 12:05:50,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:05:50,934 INFO L225 Difference]: With dead ends: 40523 [2020-10-28 12:05:50,934 INFO L226 Difference]: Without dead ends: 21193 [2020-10-28 12:05:50,954 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-28 12:05:50,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21193 states. [2020-10-28 12:05:51,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21193 to 20903. [2020-10-28 12:05:51,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20903 states. [2020-10-28 12:05:51,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20903 states to 20903 states and 23309 transitions. [2020-10-28 12:05:51,232 INFO L78 Accepts]: Start accepts. Automaton has 20903 states and 23309 transitions. Word has length 478 [2020-10-28 12:05:51,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:05:51,232 INFO L481 AbstractCegarLoop]: Abstraction has 20903 states and 23309 transitions. [2020-10-28 12:05:51,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 12:05:51,232 INFO L276 IsEmpty]: Start isEmpty. Operand 20903 states and 23309 transitions. [2020-10-28 12:05:51,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2020-10-28 12:05:51,247 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:05:51,248 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 12:05:51,248 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 12:05:51,248 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:05:51,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:05:51,249 INFO L82 PathProgramCache]: Analyzing trace with hash -3975756, now seen corresponding path program 1 times [2020-10-28 12:05:51,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:05:51,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1952444556] [2020-10-28 12:05:51,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:05:51,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:05:51,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:05:51,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking...