/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/array-industry-pattern/array_monotonic.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 09:19:49,807 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 09:19:49,813 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 09:19:49,870 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 09:19:49,871 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 09:19:49,877 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 09:19:49,880 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 09:19:49,885 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 09:19:49,889 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 09:19:49,895 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 09:19:49,897 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 09:19:49,898 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 09:19:49,899 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 09:19:49,902 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 09:19:49,907 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 09:19:49,909 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 09:19:49,911 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 09:19:49,915 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 09:19:49,917 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 09:19:49,937 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 09:19:49,957 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 09:19:49,959 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 09:19:49,963 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 09:19:49,964 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 09:19:49,971 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 09:19:49,971 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 09:19:49,971 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 09:19:49,973 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 09:19:49,978 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 09:19:49,979 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 09:19:49,980 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 09:19:49,981 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 09:19:49,981 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 09:19:49,982 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 09:19:49,984 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 09:19:49,984 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 09:19:49,985 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 09:19:49,985 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 09:19:49,985 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 09:19:49,986 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 09:19:49,987 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 09:19:49,988 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 09:19:50,015 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 09:19:50,015 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 09:19:50,017 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 09:19:50,017 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 09:19:50,017 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 09:19:50,017 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 09:19:50,018 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 09:19:50,018 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 09:19:50,018 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 09:19:50,018 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 09:19:50,018 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 09:19:50,019 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 09:19:50,019 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 09:19:50,019 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 09:19:50,019 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 09:19:50,019 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 09:19:50,020 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 09:19:50,020 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 09:19:50,020 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 09:19:50,020 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 09:19:50,020 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 09:19:50,021 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 09:19:50,021 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 09:19:50,021 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 09:19:50,021 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 09:19:50,021 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 09:19:50,022 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 09:19:50,022 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 09:19:50,022 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 09:19:50,022 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 09:19:50,412 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 09:19:50,449 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 09:19:50,453 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 09:19:50,454 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 09:19:50,455 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 09:19:50,456 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_monotonic.i [2020-10-28 09:19:50,551 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/24fd4e21d/b1b1b992a25d468fb6a7fd05db3c4da9/FLAG88d8a5d53 [2020-10-28 09:19:51,166 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 09:19:51,167 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-industry-pattern/array_monotonic.i [2020-10-28 09:19:51,175 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/24fd4e21d/b1b1b992a25d468fb6a7fd05db3c4da9/FLAG88d8a5d53 [2020-10-28 09:19:51,534 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/24fd4e21d/b1b1b992a25d468fb6a7fd05db3c4da9 [2020-10-28 09:19:51,538 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 09:19:51,564 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 09:19:51,568 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 09:19:51,569 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 09:19:51,573 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 09:19:51,574 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:19:51" (1/1) ... [2020-10-28 09:19:51,579 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@359baacf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:19:51, skipping insertion in model container [2020-10-28 09:19:51,579 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:19:51" (1/1) ... [2020-10-28 09:19:51,589 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 09:19:51,613 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 09:19:51,780 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 09:19:51,789 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 09:19:51,809 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 09:19:51,824 INFO L208 MainTranslator]: Completed translation [2020-10-28 09:19:51,825 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:19:51 WrapperNode [2020-10-28 09:19:51,825 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 09:19:51,826 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 09:19:51,826 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 09:19:51,827 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 09:19:51,840 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:19:51" (1/1) ... [2020-10-28 09:19:51,840 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:19:51" (1/1) ... [2020-10-28 09:19:51,848 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:19:51" (1/1) ... [2020-10-28 09:19:51,849 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:19:51" (1/1) ... [2020-10-28 09:19:51,873 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:19:51" (1/1) ... [2020-10-28 09:19:51,881 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:19:51" (1/1) ... [2020-10-28 09:19:51,886 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:19:51" (1/1) ... [2020-10-28 09:19:51,890 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 09:19:51,894 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 09:19:51,895 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 09:19:51,895 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 09:19:51,896 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:19:51" (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 09:19:51,989 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 09:19:51,989 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 09:19:51,989 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 09:19:51,989 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 09:19:51,989 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 09:19:51,990 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 09:19:51,990 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 09:19:51,990 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 09:19:51,990 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 09:19:51,990 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 09:19:51,990 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 09:19:51,990 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 09:19:51,991 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 09:19:51,991 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 09:19:51,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 09:19:51,991 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 09:19:51,991 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 09:19:51,991 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 09:19:51,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 09:19:51,992 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 09:19:52,500 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 09:19:52,500 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-28 09:19:52,502 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:19:52 BoogieIcfgContainer [2020-10-28 09:19:52,503 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 09:19:52,507 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 09:19:52,507 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 09:19:52,512 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 09:19:52,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 09:19:51" (1/3) ... [2020-10-28 09:19:52,514 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@662d51d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:19:52, skipping insertion in model container [2020-10-28 09:19:52,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:19:51" (2/3) ... [2020-10-28 09:19:52,515 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@662d51d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:19:52, skipping insertion in model container [2020-10-28 09:19:52,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:19:52" (3/3) ... [2020-10-28 09:19:52,517 INFO L111 eAbstractionObserver]: Analyzing ICFG array_monotonic.i [2020-10-28 09:19:52,532 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 09:19:52,538 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 09:19:52,556 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 09:19:52,601 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 09:19:52,601 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 09:19:52,602 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 09:19:52,602 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 09:19:52,602 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 09:19:52,602 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 09:19:52,602 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 09:19:52,602 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 09:19:52,625 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-10-28 09:19:52,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-28 09:19:52,636 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:19:52,637 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:19:52,638 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:19:52,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:19:52,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1575655028, now seen corresponding path program 1 times [2020-10-28 09:19:52,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:19:52,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1415244305] [2020-10-28 09:19:52,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:19:52,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:52,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:53,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:53,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-28 09:19:53,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:53,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 182 [2020-10-28 09:19:53,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:53,007 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:53,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:53,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 09:19:53,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:53,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 09:19:53,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:19:53,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:53,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:53,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:53,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:19:53,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:53,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 09:19:53,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:53,101 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:53,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:53,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:53,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:53,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:19:53,114 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 09:19:53,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1415244305] [2020-10-28 09:19:53,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:19:53,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 09:19:53,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876559295] [2020-10-28 09:19:53,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 09:19:53,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:19:53,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 09:19:53,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 09:19:53,151 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 3 states. [2020-10-28 09:19:53,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:19:53,299 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2020-10-28 09:19:53,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 09:19:53,301 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-10-28 09:19:53,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:19:53,328 INFO L225 Difference]: With dead ends: 50 [2020-10-28 09:19:53,328 INFO L226 Difference]: Without dead ends: 23 [2020-10-28 09:19:53,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 09:19:53,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-28 09:19:53,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-28 09:19:53,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-28 09:19:53,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-10-28 09:19:53,380 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 16 [2020-10-28 09:19:53,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:19:53,380 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-10-28 09:19:53,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 09:19:53,381 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-10-28 09:19:53,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-28 09:19:53,382 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:19:53,382 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:19:53,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 09:19:53,382 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:19:53,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:19:53,384 INFO L82 PathProgramCache]: Analyzing trace with hash 585993527, now seen corresponding path program 1 times [2020-10-28 09:19:53,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:19:53,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1296307103] [2020-10-28 09:19:53,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:19:53,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:53,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:53,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:53,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-28 09:19:53,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:53,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 138 [2020-10-28 09:19:53,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:53,548 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:53,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:19:53,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:19:53,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 09:19:53,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:19:53,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:19:53,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:53,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:53,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:53,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:19:53,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:53,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 09:19:53,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:53,617 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:53,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:53,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:53,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:53,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:19:53,625 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 09:19:53,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1296307103] [2020-10-28 09:19:53,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:19:53,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 09:19:53,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090013208] [2020-10-28 09:19:53,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 09:19:53,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:19:53,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 09:19:53,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 09:19:53,630 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 4 states. [2020-10-28 09:19:53,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:19:53,733 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2020-10-28 09:19:53,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 09:19:53,734 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-28 09:19:53,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:19:53,737 INFO L225 Difference]: With dead ends: 45 [2020-10-28 09:19:53,737 INFO L226 Difference]: Without dead ends: 31 [2020-10-28 09:19:53,738 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 09:19:53,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-28 09:19:53,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2020-10-28 09:19:53,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-28 09:19:53,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2020-10-28 09:19:53,752 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 16 [2020-10-28 09:19:53,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:19:53,752 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2020-10-28 09:19:53,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 09:19:53,752 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2020-10-28 09:19:53,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-28 09:19:53,753 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:19:53,754 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:19:53,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 09:19:53,754 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:19:53,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:19:53,755 INFO L82 PathProgramCache]: Analyzing trace with hash 2059042534, now seen corresponding path program 1 times [2020-10-28 09:19:53,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:19:53,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1016028222] [2020-10-28 09:19:53,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:19:53,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:53,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:53,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:54,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:54,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-28 09:19:54,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:19:54,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 633 [2020-10-28 09:19:54,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:54,409 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:54,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 09:19:54,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:19:54,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 09:19:54,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:19:54,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:19:54,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:54,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:54,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:54,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:19:54,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:54,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 09:19:54,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:54,463 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:54,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:54,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:54,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:54,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:19:54,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:19:54,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1016028222] [2020-10-28 09:19:54,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:19:54,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 09:19:54,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584145102] [2020-10-28 09:19:54,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 09:19:54,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:19:54,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 09:19:54,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 09:19:54,472 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 5 states. [2020-10-28 09:19:54,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:19:54,588 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2020-10-28 09:19:54,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 09:19:54,589 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-28 09:19:54,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:19:54,590 INFO L225 Difference]: With dead ends: 53 [2020-10-28 09:19:54,590 INFO L226 Difference]: Without dead ends: 39 [2020-10-28 09:19:54,591 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 09:19:54,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-28 09:19:54,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 27. [2020-10-28 09:19:54,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-28 09:19:54,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-10-28 09:19:54,600 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 19 [2020-10-28 09:19:54,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:19:54,600 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-10-28 09:19:54,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 09:19:54,601 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-10-28 09:19:54,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 09:19:54,602 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:19:54,602 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:19:54,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 09:19:54,605 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:19:54,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:19:54,606 INFO L82 PathProgramCache]: Analyzing trace with hash -313820457, now seen corresponding path program 2 times [2020-10-28 09:19:54,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:19:54,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [325208743] [2020-10-28 09:19:54,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:19:54,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:54,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:54,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:55,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:55,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-28 09:19:55,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:19:55,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 723 [2020-10-28 09:19:55,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:55,346 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:55,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 09:19:55,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:19:55,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 09:19:55,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:19:55,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:19:55,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:55,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:55,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:55,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:19:55,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:55,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 09:19:55,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:55,412 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:55,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:55,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:55,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:55,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:19:55,417 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:19:55,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [325208743] [2020-10-28 09:19:55,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:19:55,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 09:19:55,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124114632] [2020-10-28 09:19:55,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 09:19:55,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:19:55,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 09:19:55,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 09:19:55,420 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 6 states. [2020-10-28 09:19:55,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:19:55,559 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2020-10-28 09:19:55,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 09:19:55,560 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-28 09:19:55,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:19:55,561 INFO L225 Difference]: With dead ends: 61 [2020-10-28 09:19:55,561 INFO L226 Difference]: Without dead ends: 47 [2020-10-28 09:19:55,562 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 09:19:55,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-28 09:19:55,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 30. [2020-10-28 09:19:55,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-28 09:19:55,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2020-10-28 09:19:55,570 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 22 [2020-10-28 09:19:55,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:19:55,571 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2020-10-28 09:19:55,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 09:19:55,571 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2020-10-28 09:19:55,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-28 09:19:55,572 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:19:55,572 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:19:55,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 09:19:55,573 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:19:55,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:19:55,573 INFO L82 PathProgramCache]: Analyzing trace with hash 591539526, now seen corresponding path program 3 times [2020-10-28 09:19:55,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:19:55,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [108347197] [2020-10-28 09:19:55,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:19:55,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:55,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:55,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:56,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:56,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 09:19:56,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:19:56,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 965 [2020-10-28 09:19:56,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:56,555 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:56,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 09:19:56,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:19:56,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 09:19:56,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:56,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:19:56,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:56,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:56,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:56,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:19:56,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:56,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:19:56,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:56,621 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:56,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:56,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:56,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:56,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:56,625 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:19:56,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [108347197] [2020-10-28 09:19:56,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:19:56,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 09:19:56,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235395320] [2020-10-28 09:19:56,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 09:19:56,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:19:56,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 09:19:56,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 09:19:56,628 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 7 states. [2020-10-28 09:19:56,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:19:56,785 INFO L93 Difference]: Finished difference Result 69 states and 86 transitions. [2020-10-28 09:19:56,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 09:19:56,786 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-10-28 09:19:56,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:19:56,787 INFO L225 Difference]: With dead ends: 69 [2020-10-28 09:19:56,787 INFO L226 Difference]: Without dead ends: 55 [2020-10-28 09:19:56,788 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 09:19:56,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-28 09:19:56,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 33. [2020-10-28 09:19:56,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-28 09:19:56,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2020-10-28 09:19:56,796 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 25 [2020-10-28 09:19:56,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:19:56,796 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2020-10-28 09:19:56,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 09:19:56,797 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2020-10-28 09:19:56,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-28 09:19:56,797 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:19:56,798 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:19:56,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 09:19:56,798 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:19:56,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:19:56,799 INFO L82 PathProgramCache]: Analyzing trace with hash -223825801, now seen corresponding path program 4 times [2020-10-28 09:19:56,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:19:56,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1616635538] [2020-10-28 09:19:56,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:19:56,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:56,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:56,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:58,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:58,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 09:19:58,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:19:58,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1688 [2020-10-28 09:19:58,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:58,502 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:58,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 09:19:58,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:19:58,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 09:19:58,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:58,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:19:58,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:58,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:58,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:58,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:19:58,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:58,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 09:19:58,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:58,617 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:58,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:58,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:58,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:58,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:19:58,627 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:19:58,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1616635538] [2020-10-28 09:19:58,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:19:58,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 09:19:58,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383290573] [2020-10-28 09:19:58,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 09:19:58,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:19:58,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 09:19:58,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 09:19:58,636 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 8 states. [2020-10-28 09:19:58,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:19:58,849 INFO L93 Difference]: Finished difference Result 77 states and 97 transitions. [2020-10-28 09:19:58,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 09:19:58,851 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-10-28 09:19:58,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:19:58,853 INFO L225 Difference]: With dead ends: 77 [2020-10-28 09:19:58,853 INFO L226 Difference]: Without dead ends: 63 [2020-10-28 09:19:58,854 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 09:19:58,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-28 09:19:58,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 36. [2020-10-28 09:19:58,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-28 09:19:58,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2020-10-28 09:19:58,867 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 28 [2020-10-28 09:19:58,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:19:58,867 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2020-10-28 09:19:58,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 09:19:58,867 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2020-10-28 09:19:58,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 09:19:58,870 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:19:58,871 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:19:58,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 09:19:58,871 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:19:58,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:19:58,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1562743718, now seen corresponding path program 5 times [2020-10-28 09:19:58,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:19:58,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2039852628] [2020-10-28 09:19:58,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:19:58,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:58,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:58,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:00,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:00,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-28 09:20:00,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:20:00,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2061 [2020-10-28 09:20:00,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:00,957 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:00,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 09:20:00,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:20:00,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 09:20:00,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:01,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:01,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:01,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:01,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:01,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:01,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:01,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:20:01,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:01,047 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:01,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:01,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:01,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:01,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:01,052 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:20:01,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2039852628] [2020-10-28 09:20:01,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:01,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 09:20:01,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910451652] [2020-10-28 09:20:01,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 09:20:01,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:01,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 09:20:01,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 09:20:01,055 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand 9 states. [2020-10-28 09:20:01,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:01,226 INFO L93 Difference]: Finished difference Result 85 states and 108 transitions. [2020-10-28 09:20:01,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 09:20:01,227 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-10-28 09:20:01,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:01,228 INFO L225 Difference]: With dead ends: 85 [2020-10-28 09:20:01,228 INFO L226 Difference]: Without dead ends: 71 [2020-10-28 09:20:01,229 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 09:20:01,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-28 09:20:01,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 39. [2020-10-28 09:20:01,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-28 09:20:01,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2020-10-28 09:20:01,237 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 31 [2020-10-28 09:20:01,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:01,237 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2020-10-28 09:20:01,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 09:20:01,237 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2020-10-28 09:20:01,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 09:20:01,238 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:01,239 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:01,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 09:20:01,239 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:01,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:01,240 INFO L82 PathProgramCache]: Analyzing trace with hash 2020552215, now seen corresponding path program 6 times [2020-10-28 09:20:01,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:01,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [999934336] [2020-10-28 09:20:01,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:01,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:01,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:01,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:04,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:04,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-28 09:20:04,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:20:04,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3195 [2020-10-28 09:20:04,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:04,451 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:04,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 09:20:04,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:20:04,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 09:20:04,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:20:04,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:04,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:04,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:04,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:04,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:04,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:04,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:20:04,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:04,551 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:04,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:04,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:04,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:04,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 09:20:04,560 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:20:04,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [999934336] [2020-10-28 09:20:04,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:04,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 09:20:04,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825492854] [2020-10-28 09:20:04,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 09:20:04,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:04,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 09:20:04,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 09:20:04,565 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 10 states. [2020-10-28 09:20:04,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:04,765 INFO L93 Difference]: Finished difference Result 93 states and 119 transitions. [2020-10-28 09:20:04,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 09:20:04,766 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2020-10-28 09:20:04,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:04,767 INFO L225 Difference]: With dead ends: 93 [2020-10-28 09:20:04,767 INFO L226 Difference]: Without dead ends: 79 [2020-10-28 09:20:04,768 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 09:20:04,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-28 09:20:04,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 42. [2020-10-28 09:20:04,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-28 09:20:04,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2020-10-28 09:20:04,776 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 34 [2020-10-28 09:20:04,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:04,776 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2020-10-28 09:20:04,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 09:20:04,776 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2020-10-28 09:20:04,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-28 09:20:04,777 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:04,778 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:04,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 09:20:04,778 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:04,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:04,779 INFO L82 PathProgramCache]: Analyzing trace with hash -222645754, now seen corresponding path program 7 times [2020-10-28 09:20:04,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:04,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [374729723] [2020-10-28 09:20:04,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:04,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:04,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:05,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:08,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:08,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-28 09:20:08,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:20:08,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3547 [2020-10-28 09:20:08,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:08,343 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:08,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 09:20:08,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:20:08,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 09:20:08,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:08,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:08,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:08,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:08,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:08,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:08,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:08,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:20:08,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:08,491 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:08,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:08,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:08,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:08,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:08,499 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:20:08,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [374729723] [2020-10-28 09:20:08,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:08,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 09:20:08,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591783502] [2020-10-28 09:20:08,503 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 09:20:08,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:08,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 09:20:08,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 09:20:08,511 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand 11 states. [2020-10-28 09:20:08,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:08,760 INFO L93 Difference]: Finished difference Result 101 states and 130 transitions. [2020-10-28 09:20:08,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 09:20:08,761 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-10-28 09:20:08,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:08,762 INFO L225 Difference]: With dead ends: 101 [2020-10-28 09:20:08,762 INFO L226 Difference]: Without dead ends: 87 [2020-10-28 09:20:08,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 09:20:08,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-28 09:20:08,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 45. [2020-10-28 09:20:08,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-28 09:20:08,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 55 transitions. [2020-10-28 09:20:08,780 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 55 transitions. Word has length 37 [2020-10-28 09:20:08,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:08,780 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 55 transitions. [2020-10-28 09:20:08,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 09:20:08,780 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 55 transitions. [2020-10-28 09:20:08,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-28 09:20:08,783 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:08,783 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:08,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 09:20:08,783 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:08,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:08,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1937181769, now seen corresponding path program 8 times [2020-10-28 09:20:08,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:08,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [594792034] [2020-10-28 09:20:08,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:08,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:08,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:08,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:13,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:13,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-28 09:20:13,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:20:13,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4419 [2020-10-28 09:20:13,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:13,226 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:13,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 09:20:13,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:20:13,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 09:20:13,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:13,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:13,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:13,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:13,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:13,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:13,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:13,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 09:20:13,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:13,358 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:13,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:13,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:13,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:13,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:13,365 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:20:13,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [594792034] [2020-10-28 09:20:13,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:13,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 09:20:13,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396075602] [2020-10-28 09:20:13,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 09:20:13,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:13,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 09:20:13,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 09:20:13,369 INFO L87 Difference]: Start difference. First operand 45 states and 55 transitions. Second operand 12 states. [2020-10-28 09:20:13,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:13,622 INFO L93 Difference]: Finished difference Result 109 states and 141 transitions. [2020-10-28 09:20:13,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 09:20:13,622 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-10-28 09:20:13,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:13,623 INFO L225 Difference]: With dead ends: 109 [2020-10-28 09:20:13,624 INFO L226 Difference]: Without dead ends: 95 [2020-10-28 09:20:13,624 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 09:20:13,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-28 09:20:13,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 48. [2020-10-28 09:20:13,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-28 09:20:13,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 59 transitions. [2020-10-28 09:20:13,632 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 59 transitions. Word has length 40 [2020-10-28 09:20:13,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:13,632 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 59 transitions. [2020-10-28 09:20:13,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 09:20:13,633 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 59 transitions. [2020-10-28 09:20:13,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-28 09:20:13,633 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:13,634 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:13,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 09:20:13,634 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:13,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:13,635 INFO L82 PathProgramCache]: Analyzing trace with hash 366446694, now seen corresponding path program 9 times [2020-10-28 09:20:13,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:13,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1790733799] [2020-10-28 09:20:13,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:13,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:13,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:13,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:18,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:18,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-28 09:20:18,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:20:18,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 09:20:18,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:18,654 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:18,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 09:20:18,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:20:18,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 09:20:18,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:18,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:18,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:18,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:18,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:18,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:18,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:18,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:20:18,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:18,801 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:18,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:18,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:18,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:18,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:18,809 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:20:18,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1790733799] [2020-10-28 09:20:18,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:18,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 09:20:18,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264331790] [2020-10-28 09:20:18,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 09:20:18,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:18,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 09:20:18,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:20:18,811 INFO L87 Difference]: Start difference. First operand 48 states and 59 transitions. Second operand 13 states. [2020-10-28 09:20:19,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:19,078 INFO L93 Difference]: Finished difference Result 117 states and 152 transitions. [2020-10-28 09:20:19,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 09:20:19,079 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 43 [2020-10-28 09:20:19,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:19,081 INFO L225 Difference]: With dead ends: 117 [2020-10-28 09:20:19,081 INFO L226 Difference]: Without dead ends: 103 [2020-10-28 09:20:19,081 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:20:19,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-28 09:20:19,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 51. [2020-10-28 09:20:19,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-28 09:20:19,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2020-10-28 09:20:19,095 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 43 [2020-10-28 09:20:19,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:19,098 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2020-10-28 09:20:19,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 09:20:19,098 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2020-10-28 09:20:19,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-28 09:20:19,101 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:19,101 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:19,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 09:20:19,102 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:19,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:19,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1520434857, now seen corresponding path program 10 times [2020-10-28 09:20:19,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:19,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1177606981] [2020-10-28 09:20:19,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:19,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:19,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:19,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:24,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:24,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-28 09:20:24,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:20:24,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 09:20:24,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:24,124 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:24,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 09:20:24,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:20:24,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 09:20:24,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:24,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:24,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:24,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:24,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:24,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:24,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:24,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:20:24,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:24,323 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:24,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:24,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:24,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:24,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:24,329 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:20:24,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1177606981] [2020-10-28 09:20:24,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:24,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 09:20:24,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634063220] [2020-10-28 09:20:24,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 09:20:24,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:24,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 09:20:24,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:20:24,332 INFO L87 Difference]: Start difference. First operand 51 states and 63 transitions. Second operand 14 states. [2020-10-28 09:20:24,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:24,622 INFO L93 Difference]: Finished difference Result 125 states and 163 transitions. [2020-10-28 09:20:24,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 09:20:24,623 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 46 [2020-10-28 09:20:24,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:24,624 INFO L225 Difference]: With dead ends: 125 [2020-10-28 09:20:24,624 INFO L226 Difference]: Without dead ends: 111 [2020-10-28 09:20:24,625 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:20:24,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-28 09:20:24,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 54. [2020-10-28 09:20:24,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-28 09:20:24,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 67 transitions. [2020-10-28 09:20:24,632 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 67 transitions. Word has length 46 [2020-10-28 09:20:24,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:24,632 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 67 transitions. [2020-10-28 09:20:24,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 09:20:24,632 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 67 transitions. [2020-10-28 09:20:24,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-28 09:20:24,633 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:24,633 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:24,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 09:20:24,634 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:24,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:24,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1076750650, now seen corresponding path program 11 times [2020-10-28 09:20:24,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:24,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [823164296] [2020-10-28 09:20:24,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:24,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:24,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:24,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:29,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:29,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-28 09:20:29,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:20:29,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 09:20:29,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:29,656 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:29,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 09:20:29,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:20:29,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 09:20:29,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:29,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:29,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:29,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:29,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:29,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:29,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:29,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:20:29,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:29,869 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:29,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:29,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:29,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:29,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:29,875 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:20:29,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [823164296] [2020-10-28 09:20:29,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:29,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 09:20:29,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970123560] [2020-10-28 09:20:29,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 09:20:29,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:29,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 09:20:29,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 09:20:29,878 INFO L87 Difference]: Start difference. First operand 54 states and 67 transitions. Second operand 15 states. [2020-10-28 09:20:30,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:30,298 INFO L93 Difference]: Finished difference Result 133 states and 174 transitions. [2020-10-28 09:20:30,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 09:20:30,304 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 49 [2020-10-28 09:20:30,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:30,305 INFO L225 Difference]: With dead ends: 133 [2020-10-28 09:20:30,305 INFO L226 Difference]: Without dead ends: 119 [2020-10-28 09:20:30,306 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 09:20:30,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-28 09:20:30,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 57. [2020-10-28 09:20:30,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-28 09:20:30,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2020-10-28 09:20:30,321 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 49 [2020-10-28 09:20:30,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:30,321 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2020-10-28 09:20:30,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 09:20:30,322 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2020-10-28 09:20:30,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-28 09:20:30,326 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:30,326 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:30,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 09:20:30,326 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:30,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:30,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1105090295, now seen corresponding path program 12 times [2020-10-28 09:20:30,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:30,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1467656785] [2020-10-28 09:20:30,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:30,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:30,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:30,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:35,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:35,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-28 09:20:35,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:20:35,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 09:20:35,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:35,358 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:35,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 09:20:35,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:20:35,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 09:20:35,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:35,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:35,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:35,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:35,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:35,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:35,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:35,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:20:35,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:35,586 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:35,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:35,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:35,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:35,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:35,593 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:20:35,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1467656785] [2020-10-28 09:20:35,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:35,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 09:20:35,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469272972] [2020-10-28 09:20:35,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 09:20:35,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:35,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 09:20:35,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 09:20:35,596 INFO L87 Difference]: Start difference. First operand 57 states and 71 transitions. Second operand 16 states. [2020-10-28 09:20:36,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:36,016 INFO L93 Difference]: Finished difference Result 141 states and 185 transitions. [2020-10-28 09:20:36,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 09:20:36,017 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 52 [2020-10-28 09:20:36,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:36,019 INFO L225 Difference]: With dead ends: 141 [2020-10-28 09:20:36,019 INFO L226 Difference]: Without dead ends: 127 [2020-10-28 09:20:36,019 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 09:20:36,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-28 09:20:36,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 60. [2020-10-28 09:20:36,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-28 09:20:36,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 75 transitions. [2020-10-28 09:20:36,031 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 75 transitions. Word has length 52 [2020-10-28 09:20:36,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:36,031 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 75 transitions. [2020-10-28 09:20:36,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 09:20:36,031 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 75 transitions. [2020-10-28 09:20:36,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-28 09:20:36,032 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:36,032 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:36,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 09:20:36,033 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:36,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:36,033 INFO L82 PathProgramCache]: Analyzing trace with hash 293625126, now seen corresponding path program 13 times [2020-10-28 09:20:36,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:36,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1815043673] [2020-10-28 09:20:36,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:36,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:36,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:36,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:41,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:41,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 09:20:41,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:20:41,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 09:20:41,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:41,056 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:41,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 09:20:41,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:20:41,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 09:20:41,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:41,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:41,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:41,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:41,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:41,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:41,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:41,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:20:41,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:41,293 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:41,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:41,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:41,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:41,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:41,300 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:20:41,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1815043673] [2020-10-28 09:20:41,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:41,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 09:20:41,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834501477] [2020-10-28 09:20:41,302 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 09:20:41,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:41,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 09:20:41,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:20:41,303 INFO L87 Difference]: Start difference. First operand 60 states and 75 transitions. Second operand 17 states. [2020-10-28 09:20:41,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:41,731 INFO L93 Difference]: Finished difference Result 149 states and 196 transitions. [2020-10-28 09:20:41,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 09:20:41,736 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 55 [2020-10-28 09:20:41,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:41,738 INFO L225 Difference]: With dead ends: 149 [2020-10-28 09:20:41,738 INFO L226 Difference]: Without dead ends: 135 [2020-10-28 09:20:41,739 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:20:41,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-28 09:20:41,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 63. [2020-10-28 09:20:41,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-28 09:20:41,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 79 transitions. [2020-10-28 09:20:41,746 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 79 transitions. Word has length 55 [2020-10-28 09:20:41,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:41,746 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 79 transitions. [2020-10-28 09:20:41,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 09:20:41,746 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 79 transitions. [2020-10-28 09:20:41,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-28 09:20:41,747 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:41,747 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:41,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 09:20:41,748 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:41,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:41,748 INFO L82 PathProgramCache]: Analyzing trace with hash -1989282665, now seen corresponding path program 14 times [2020-10-28 09:20:41,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:41,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1400940027] [2020-10-28 09:20:41,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:41,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:41,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:42,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:46,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:46,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 09:20:46,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:20:46,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 09:20:46,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:46,778 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:46,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 09:20:46,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:20:46,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 09:20:46,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:47,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:47,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:47,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:47,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:47,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:47,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:47,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:20:47,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:47,017 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:47,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:47,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:47,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:47,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:47,024 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:20:47,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1400940027] [2020-10-28 09:20:47,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:47,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 09:20:47,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309908900] [2020-10-28 09:20:47,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 09:20:47,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:47,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 09:20:47,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 09:20:47,027 INFO L87 Difference]: Start difference. First operand 63 states and 79 transitions. Second operand 18 states. [2020-10-28 09:20:47,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:47,433 INFO L93 Difference]: Finished difference Result 157 states and 207 transitions. [2020-10-28 09:20:47,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 09:20:47,434 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 58 [2020-10-28 09:20:47,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:47,435 INFO L225 Difference]: With dead ends: 157 [2020-10-28 09:20:47,435 INFO L226 Difference]: Without dead ends: 143 [2020-10-28 09:20:47,436 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 09:20:47,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-28 09:20:47,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 66. [2020-10-28 09:20:47,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-28 09:20:47,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 83 transitions. [2020-10-28 09:20:47,443 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 83 transitions. Word has length 58 [2020-10-28 09:20:47,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:47,443 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 83 transitions. [2020-10-28 09:20:47,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 09:20:47,443 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 83 transitions. [2020-10-28 09:20:47,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-28 09:20:47,444 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:47,444 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:47,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 09:20:47,444 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:47,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:47,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1288152186, now seen corresponding path program 15 times [2020-10-28 09:20:47,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:47,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [579959237] [2020-10-28 09:20:47,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:47,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:47,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:47,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:52,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:52,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-28 09:20:52,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:20:52,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 09:20:52,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:52,467 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:52,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 09:20:52,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:20:52,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-28 09:20:52,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:52,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:52,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:52,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:52,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:52,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:52,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:52,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:20:52,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:52,778 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:52,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:52,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:52,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:52,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:20:52,792 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:20:52,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [579959237] [2020-10-28 09:20:52,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:52,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 09:20:52,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275512437] [2020-10-28 09:20:52,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 09:20:52,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:52,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 09:20:52,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 09:20:52,795 INFO L87 Difference]: Start difference. First operand 66 states and 83 transitions. Second operand 19 states. [2020-10-28 09:20:53,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:53,453 INFO L93 Difference]: Finished difference Result 165 states and 218 transitions. [2020-10-28 09:20:53,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 09:20:53,454 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 61 [2020-10-28 09:20:53,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:53,456 INFO L225 Difference]: With dead ends: 165 [2020-10-28 09:20:53,456 INFO L226 Difference]: Without dead ends: 151 [2020-10-28 09:20:53,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 09:20:53,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-28 09:20:53,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 69. [2020-10-28 09:20:53,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-28 09:20:53,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 87 transitions. [2020-10-28 09:20:53,463 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 87 transitions. Word has length 61 [2020-10-28 09:20:53,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:53,464 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 87 transitions. [2020-10-28 09:20:53,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 09:20:53,464 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 87 transitions. [2020-10-28 09:20:53,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-28 09:20:53,464 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:53,464 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:53,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 09:20:53,465 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:53,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:53,465 INFO L82 PathProgramCache]: Analyzing trace with hash -336012745, now seen corresponding path program 16 times [2020-10-28 09:20:53,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:53,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1074754931] [2020-10-28 09:20:53,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:53,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:53,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:53,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:58,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:58,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 09:20:58,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:20:58,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 09:20:58,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:58,493 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:58,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 09:20:58,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:20:58,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-28 09:20:58,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:58,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:58,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:58,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:58,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:58,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:58,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:58,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:20:58,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:58,784 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:58,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:58,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:58,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:58,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:58,791 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:20:58,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1074754931] [2020-10-28 09:20:58,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:58,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 09:20:58,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158882321] [2020-10-28 09:20:58,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 09:20:58,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:58,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 09:20:58,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 09:20:58,794 INFO L87 Difference]: Start difference. First operand 69 states and 87 transitions. Second operand 20 states. [2020-10-28 09:20:59,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:59,299 INFO L93 Difference]: Finished difference Result 173 states and 229 transitions. [2020-10-28 09:20:59,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 09:20:59,300 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 64 [2020-10-28 09:20:59,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:59,302 INFO L225 Difference]: With dead ends: 173 [2020-10-28 09:20:59,302 INFO L226 Difference]: Without dead ends: 159 [2020-10-28 09:20:59,303 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 09:20:59,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-28 09:20:59,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 72. [2020-10-28 09:20:59,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-28 09:20:59,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 91 transitions. [2020-10-28 09:20:59,323 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 91 transitions. Word has length 64 [2020-10-28 09:20:59,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:59,323 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 91 transitions. [2020-10-28 09:20:59,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 09:20:59,323 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 91 transitions. [2020-10-28 09:20:59,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 09:20:59,325 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:59,325 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:59,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 09:20:59,326 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:59,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:59,328 INFO L82 PathProgramCache]: Analyzing trace with hash 886051302, now seen corresponding path program 17 times [2020-10-28 09:20:59,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:59,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [568221262] [2020-10-28 09:20:59,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:59,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:59,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:59,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:04,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:04,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 09:21:04,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:21:04,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 09:21:04,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:04,362 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:04,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 09:21:04,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:21:04,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-28 09:21:04,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:04,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:21:04,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:04,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:04,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:04,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:21:04,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:04,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:21:04,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:04,655 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:04,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:04,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:21:04,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:04,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:04,664 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:21:04,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [568221262] [2020-10-28 09:21:04,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:21:04,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 09:21:04,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139720938] [2020-10-28 09:21:04,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 09:21:04,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:21:04,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 09:21:04,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 09:21:04,666 INFO L87 Difference]: Start difference. First operand 72 states and 91 transitions. Second operand 21 states. [2020-10-28 09:21:05,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:21:05,165 INFO L93 Difference]: Finished difference Result 181 states and 240 transitions. [2020-10-28 09:21:05,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 09:21:05,166 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 67 [2020-10-28 09:21:05,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:21:05,167 INFO L225 Difference]: With dead ends: 181 [2020-10-28 09:21:05,167 INFO L226 Difference]: Without dead ends: 167 [2020-10-28 09:21:05,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 09:21:05,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-28 09:21:05,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 75. [2020-10-28 09:21:05,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-28 09:21:05,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 95 transitions. [2020-10-28 09:21:05,175 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 95 transitions. Word has length 67 [2020-10-28 09:21:05,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:21:05,175 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 95 transitions. [2020-10-28 09:21:05,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 09:21:05,175 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 95 transitions. [2020-10-28 09:21:05,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-28 09:21:05,176 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:21:05,176 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:21:05,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 09:21:05,176 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:21:05,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:21:05,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1041692713, now seen corresponding path program 18 times [2020-10-28 09:21:05,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:21:05,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [532071474] [2020-10-28 09:21:05,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:21:05,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:05,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:05,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:10,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:10,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 09:21:10,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:21:10,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 09:21:10,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:10,205 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:10,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 09:21:10,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:21:10,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-28 09:21:10,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:10,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:21:10,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:10,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:10,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:10,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:21:10,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:10,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:21:10,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:10,538 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:10,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:10,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:21:10,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:10,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:10,544 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:21:10,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [532071474] [2020-10-28 09:21:10,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:21:10,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 09:21:10,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686176778] [2020-10-28 09:21:10,545 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 09:21:10,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:21:10,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 09:21:10,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-28 09:21:10,546 INFO L87 Difference]: Start difference. First operand 75 states and 95 transitions. Second operand 22 states. [2020-10-28 09:21:11,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:21:11,088 INFO L93 Difference]: Finished difference Result 189 states and 251 transitions. [2020-10-28 09:21:11,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 09:21:11,088 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 70 [2020-10-28 09:21:11,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:21:11,090 INFO L225 Difference]: With dead ends: 189 [2020-10-28 09:21:11,090 INFO L226 Difference]: Without dead ends: 175 [2020-10-28 09:21:11,091 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-28 09:21:11,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-28 09:21:11,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 78. [2020-10-28 09:21:11,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-28 09:21:11,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 99 transitions. [2020-10-28 09:21:11,098 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 99 transitions. Word has length 70 [2020-10-28 09:21:11,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:21:11,098 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 99 transitions. [2020-10-28 09:21:11,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 09:21:11,098 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 99 transitions. [2020-10-28 09:21:11,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-28 09:21:11,099 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:21:11,099 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:21:11,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 09:21:11,100 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:21:11,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:21:11,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1839038534, now seen corresponding path program 19 times [2020-10-28 09:21:11,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:21:11,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [313991898] [2020-10-28 09:21:11,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:21:11,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:11,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:12,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:16,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:16,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-28 09:21:16,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:21:16,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 09:21:16,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:16,122 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:16,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 09:21:16,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:21:16,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-28 09:21:16,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:16,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:21:16,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:16,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:16,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:16,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:21:16,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:16,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:21:16,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:16,538 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:16,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:16,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:21:16,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:16,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:16,547 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:21:16,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [313991898] [2020-10-28 09:21:16,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:21:16,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 09:21:16,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808512788] [2020-10-28 09:21:16,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 09:21:16,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:21:16,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 09:21:16,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-28 09:21:16,550 INFO L87 Difference]: Start difference. First operand 78 states and 99 transitions. Second operand 23 states. [2020-10-28 09:21:17,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:21:17,188 INFO L93 Difference]: Finished difference Result 197 states and 262 transitions. [2020-10-28 09:21:17,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 09:21:17,191 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 73 [2020-10-28 09:21:17,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:21:17,193 INFO L225 Difference]: With dead ends: 197 [2020-10-28 09:21:17,193 INFO L226 Difference]: Without dead ends: 183 [2020-10-28 09:21:17,194 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-28 09:21:17,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-28 09:21:17,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 81. [2020-10-28 09:21:17,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-28 09:21:17,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 103 transitions. [2020-10-28 09:21:17,207 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 103 transitions. Word has length 73 [2020-10-28 09:21:17,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:21:17,207 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 103 transitions. [2020-10-28 09:21:17,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 09:21:17,209 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 103 transitions. [2020-10-28 09:21:17,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-28 09:21:17,210 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:21:17,210 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:21:17,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 09:21:17,211 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:21:17,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:21:17,211 INFO L82 PathProgramCache]: Analyzing trace with hash -332890761, now seen corresponding path program 20 times [2020-10-28 09:21:17,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:21:17,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [52146309] [2020-10-28 09:21:17,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:21:17,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:17,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:17,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:22,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:22,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-28 09:21:22,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:21:22,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 09:21:22,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:22,237 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:22,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 09:21:22,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:21:22,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-28 09:21:22,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:22,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:21:22,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:22,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:22,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:22,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:21:22,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:22,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:21:22,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:22,654 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:22,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:22,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:21:22,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:22,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:22,661 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:21:22,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [52146309] [2020-10-28 09:21:22,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:21:22,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 09:21:22,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175493862] [2020-10-28 09:21:22,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 09:21:22,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:21:22,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 09:21:22,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-28 09:21:22,663 INFO L87 Difference]: Start difference. First operand 81 states and 103 transitions. Second operand 24 states. [2020-10-28 09:21:23,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:21:23,328 INFO L93 Difference]: Finished difference Result 205 states and 273 transitions. [2020-10-28 09:21:23,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 09:21:23,332 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 76 [2020-10-28 09:21:23,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:21:23,334 INFO L225 Difference]: With dead ends: 205 [2020-10-28 09:21:23,334 INFO L226 Difference]: Without dead ends: 191 [2020-10-28 09:21:23,335 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-28 09:21:23,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-28 09:21:23,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 84. [2020-10-28 09:21:23,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-28 09:21:23,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 107 transitions. [2020-10-28 09:21:23,342 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 107 transitions. Word has length 76 [2020-10-28 09:21:23,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:21:23,342 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 107 transitions. [2020-10-28 09:21:23,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 09:21:23,343 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 107 transitions. [2020-10-28 09:21:23,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-28 09:21:23,343 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:21:23,343 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:21:23,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 09:21:23,344 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:21:23,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:21:23,344 INFO L82 PathProgramCache]: Analyzing trace with hash -596203866, now seen corresponding path program 21 times [2020-10-28 09:21:23,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:21:23,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1259108691] [2020-10-28 09:21:23,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:21:23,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:23,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:23,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:28,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:28,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-28 09:21:28,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:21:28,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 09:21:28,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:28,378 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:28,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-28 09:21:28,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:21:28,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-28 09:21:28,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:28,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:21:28,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:28,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:28,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:28,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:21:28,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:28,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:21:28,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:28,860 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:28,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:28,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:21:28,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:28,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:28,868 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:21:28,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1259108691] [2020-10-28 09:21:28,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:21:28,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 09:21:28,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228212284] [2020-10-28 09:21:28,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 09:21:28,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:21:28,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 09:21:28,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-28 09:21:28,871 INFO L87 Difference]: Start difference. First operand 84 states and 107 transitions. Second operand 25 states. [2020-10-28 09:21:29,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:21:29,519 INFO L93 Difference]: Finished difference Result 213 states and 284 transitions. [2020-10-28 09:21:29,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 09:21:29,520 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 79 [2020-10-28 09:21:29,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:21:29,521 INFO L225 Difference]: With dead ends: 213 [2020-10-28 09:21:29,521 INFO L226 Difference]: Without dead ends: 199 [2020-10-28 09:21:29,522 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-28 09:21:29,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-28 09:21:29,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 87. [2020-10-28 09:21:29,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-28 09:21:29,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 111 transitions. [2020-10-28 09:21:29,529 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 111 transitions. Word has length 79 [2020-10-28 09:21:29,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:21:29,530 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 111 transitions. [2020-10-28 09:21:29,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 09:21:29,530 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 111 transitions. [2020-10-28 09:21:29,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-28 09:21:29,530 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:21:29,530 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:21:29,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 09:21:29,531 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:21:29,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:21:29,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1948334871, now seen corresponding path program 22 times [2020-10-28 09:21:29,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:21:29,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1177742192] [2020-10-28 09:21:29,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:21:29,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:29,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:29,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:34,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:34,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-28 09:21:34,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:21:34,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 09:21:34,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:34,553 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:34,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-28 09:21:34,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:21:34,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-28 09:21:34,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:35,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:21:35,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:35,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:35,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:35,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:21:35,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:35,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:21:35,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:35,056 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:35,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:35,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:21:35,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:35,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:35,064 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:21:35,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1177742192] [2020-10-28 09:21:35,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:21:35,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-28 09:21:35,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082040374] [2020-10-28 09:21:35,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-28 09:21:35,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:21:35,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-28 09:21:35,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-28 09:21:35,066 INFO L87 Difference]: Start difference. First operand 87 states and 111 transitions. Second operand 26 states. [2020-10-28 09:21:35,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:21:35,840 INFO L93 Difference]: Finished difference Result 221 states and 295 transitions. [2020-10-28 09:21:35,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 09:21:35,841 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 82 [2020-10-28 09:21:35,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:21:35,843 INFO L225 Difference]: With dead ends: 221 [2020-10-28 09:21:35,843 INFO L226 Difference]: Without dead ends: 207 [2020-10-28 09:21:35,844 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-28 09:21:35,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-28 09:21:35,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 90. [2020-10-28 09:21:35,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-28 09:21:35,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 115 transitions. [2020-10-28 09:21:35,850 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 115 transitions. Word has length 82 [2020-10-28 09:21:35,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:21:35,851 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 115 transitions. [2020-10-28 09:21:35,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-28 09:21:35,851 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 115 transitions. [2020-10-28 09:21:35,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-28 09:21:35,852 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:21:35,852 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:21:35,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 09:21:35,852 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:21:35,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:21:35,853 INFO L82 PathProgramCache]: Analyzing trace with hash 129074438, now seen corresponding path program 23 times [2020-10-28 09:21:35,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:21:35,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1164092890] [2020-10-28 09:21:35,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:21:35,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:35,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:39,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:40,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:40,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-28 09:21:40,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:21:40,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 09:21:40,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:40,881 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:40,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-28 09:21:40,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:21:40,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-28 09:21:40,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:41,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:21:41,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:41,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:41,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:41,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:21:41,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:41,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:21:41,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:41,363 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:41,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:41,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:21:41,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:41,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:41,371 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:21:41,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1164092890] [2020-10-28 09:21:41,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:21:41,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-28 09:21:41,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897402101] [2020-10-28 09:21:41,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-28 09:21:41,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:21:41,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-28 09:21:41,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-28 09:21:41,373 INFO L87 Difference]: Start difference. First operand 90 states and 115 transitions. Second operand 27 states. [2020-10-28 09:21:42,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:21:42,172 INFO L93 Difference]: Finished difference Result 229 states and 306 transitions. [2020-10-28 09:21:42,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-28 09:21:42,172 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 85 [2020-10-28 09:21:42,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:21:42,174 INFO L225 Difference]: With dead ends: 229 [2020-10-28 09:21:42,174 INFO L226 Difference]: Without dead ends: 215 [2020-10-28 09:21:42,175 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-28 09:21:42,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-28 09:21:42,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 93. [2020-10-28 09:21:42,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-28 09:21:42,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 119 transitions. [2020-10-28 09:21:42,182 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 119 transitions. Word has length 85 [2020-10-28 09:21:42,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:21:42,183 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 119 transitions. [2020-10-28 09:21:42,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-28 09:21:42,183 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 119 transitions. [2020-10-28 09:21:42,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-28 09:21:42,184 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:21:42,184 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:21:42,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 09:21:42,184 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:21:42,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:21:42,185 INFO L82 PathProgramCache]: Analyzing trace with hash 733823159, now seen corresponding path program 24 times [2020-10-28 09:21:42,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:21:42,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1320359452] [2020-10-28 09:21:42,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:21:42,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:42,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:42,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:47,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:47,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-28 09:21:47,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:21:47,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 09:21:47,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:47,214 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:47,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-28 09:21:47,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:21:47,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-28 09:21:47,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:47,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:21:47,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:47,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:47,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:47,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:21:47,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:47,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:21:47,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:47,783 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:47,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:47,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:21:47,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:47,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:47,797 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:21:47,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1320359452] [2020-10-28 09:21:47,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:21:47,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-28 09:21:47,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124719363] [2020-10-28 09:21:47,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-28 09:21:47,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:21:47,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-28 09:21:47,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-28 09:21:47,802 INFO L87 Difference]: Start difference. First operand 93 states and 119 transitions. Second operand 28 states. [2020-10-28 09:21:48,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:21:48,617 INFO L93 Difference]: Finished difference Result 237 states and 317 transitions. [2020-10-28 09:21:48,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 09:21:48,617 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 88 [2020-10-28 09:21:48,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:21:48,621 INFO L225 Difference]: With dead ends: 237 [2020-10-28 09:21:48,622 INFO L226 Difference]: Without dead ends: 223 [2020-10-28 09:21:48,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-28 09:21:48,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-28 09:21:48,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 96. [2020-10-28 09:21:48,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-28 09:21:48,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 123 transitions. [2020-10-28 09:21:48,632 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 123 transitions. Word has length 88 [2020-10-28 09:21:48,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:21:48,632 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 123 transitions. [2020-10-28 09:21:48,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-28 09:21:48,633 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 123 transitions. [2020-10-28 09:21:48,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-28 09:21:48,634 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:21:48,634 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:21:48,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 09:21:48,634 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:21:48,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:21:48,636 INFO L82 PathProgramCache]: Analyzing trace with hash -584836250, now seen corresponding path program 25 times [2020-10-28 09:21:48,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:21:48,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1338676219] [2020-10-28 09:21:48,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:21:48,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:48,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:53,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:53,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:53,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-28 09:21:53,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:21:53,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 09:21:53,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:53,667 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:53,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-28 09:21:53,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:21:53,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-28 09:21:53,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:54,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:21:54,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:54,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:54,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:54,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:21:54,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:54,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:21:54,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:54,265 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:54,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:54,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:21:54,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:54,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:54,282 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:21:54,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1338676219] [2020-10-28 09:21:54,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:21:54,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-28 09:21:54,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24949049] [2020-10-28 09:21:54,284 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-28 09:21:54,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:21:54,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-28 09:21:54,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-28 09:21:54,285 INFO L87 Difference]: Start difference. First operand 96 states and 123 transitions. Second operand 29 states. [2020-10-28 09:21:55,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:21:55,167 INFO L93 Difference]: Finished difference Result 245 states and 328 transitions. [2020-10-28 09:21:55,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-28 09:21:55,167 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 91 [2020-10-28 09:21:55,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:21:55,169 INFO L225 Difference]: With dead ends: 245 [2020-10-28 09:21:55,170 INFO L226 Difference]: Without dead ends: 231 [2020-10-28 09:21:55,170 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-28 09:21:55,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-28 09:21:55,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 99. [2020-10-28 09:21:55,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-28 09:21:55,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 127 transitions. [2020-10-28 09:21:55,178 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 127 transitions. Word has length 91 [2020-10-28 09:21:55,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:21:55,178 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 127 transitions. [2020-10-28 09:21:55,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-28 09:21:55,178 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 127 transitions. [2020-10-28 09:21:55,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-28 09:21:55,179 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:21:55,179 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:21:55,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 09:21:55,180 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:21:55,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:21:55,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1298566743, now seen corresponding path program 26 times [2020-10-28 09:21:55,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:21:55,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [31930106] [2020-10-28 09:21:55,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:21:55,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:55,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:55,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:00,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:00,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-28 09:22:00,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:22:00,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 09:22:00,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:00,211 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:00,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-28 09:22:00,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:22:00,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-28 09:22:00,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:00,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:22:00,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:00,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:00,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:00,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:22:00,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:22:00,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:22:00,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:00,853 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:00,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:22:00,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:22:00,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:22:00,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:00,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:22:00,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [31930106] [2020-10-28 09:22:00,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:22:00,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-28 09:22:00,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607555391] [2020-10-28 09:22:00,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-28 09:22:00,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:22:00,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-28 09:22:00,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-28 09:22:00,873 INFO L87 Difference]: Start difference. First operand 99 states and 127 transitions. Second operand 30 states. [2020-10-28 09:22:01,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:22:01,820 INFO L93 Difference]: Finished difference Result 253 states and 339 transitions. [2020-10-28 09:22:01,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-28 09:22:01,821 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 94 [2020-10-28 09:22:01,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:22:01,823 INFO L225 Difference]: With dead ends: 253 [2020-10-28 09:22:01,823 INFO L226 Difference]: Without dead ends: 239 [2020-10-28 09:22:01,824 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-28 09:22:01,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-10-28 09:22:01,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 102. [2020-10-28 09:22:01,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-28 09:22:01,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 131 transitions. [2020-10-28 09:22:01,832 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 131 transitions. Word has length 94 [2020-10-28 09:22:01,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:22:01,832 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 131 transitions. [2020-10-28 09:22:01,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-28 09:22:01,832 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 131 transitions. [2020-10-28 09:22:01,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-28 09:22:01,833 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:22:01,833 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:22:01,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 09:22:01,834 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:22:01,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:22:01,834 INFO L82 PathProgramCache]: Analyzing trace with hash 304376262, now seen corresponding path program 27 times [2020-10-28 09:22:01,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:22:01,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [375333371] [2020-10-28 09:22:01,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:22:01,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:01,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:02,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:07,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:07,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-28 09:22:07,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:22:07,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5716 [2020-10-28 09:22:07,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:07,574 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:07,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-28 09:22:07,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:22:07,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-28 09:22:07,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:08,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:22:08,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:08,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:08,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:08,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:22:08,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:22:08,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:22:08,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:08,256 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:08,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:22:08,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:22:08,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:22:08,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:08,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 0 proven. 1080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:22:08,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [375333371] [2020-10-28 09:22:08,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:22:08,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-28 09:22:08,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549918933] [2020-10-28 09:22:08,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-28 09:22:08,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:22:08,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-28 09:22:08,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-28 09:22:08,270 INFO L87 Difference]: Start difference. First operand 102 states and 131 transitions. Second operand 31 states. [2020-10-28 09:22:09,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:22:09,260 INFO L93 Difference]: Finished difference Result 261 states and 350 transitions. [2020-10-28 09:22:09,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-28 09:22:09,261 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 97 [2020-10-28 09:22:09,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:22:09,264 INFO L225 Difference]: With dead ends: 261 [2020-10-28 09:22:09,264 INFO L226 Difference]: Without dead ends: 247 [2020-10-28 09:22:09,265 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-28 09:22:09,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2020-10-28 09:22:09,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 105. [2020-10-28 09:22:09,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-28 09:22:09,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 135 transitions. [2020-10-28 09:22:09,275 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 135 transitions. Word has length 97 [2020-10-28 09:22:09,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:22:09,275 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 135 transitions. [2020-10-28 09:22:09,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-28 09:22:09,276 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 135 transitions. [2020-10-28 09:22:09,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-28 09:22:09,277 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:22:09,277 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:22:09,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 09:22:09,277 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:22:09,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:22:09,278 INFO L82 PathProgramCache]: Analyzing trace with hash 470230007, now seen corresponding path program 28 times [2020-10-28 09:22:09,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:22:09,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1415274889] [2020-10-28 09:22:09,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:22:09,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:09,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:10,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:15,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:15,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-28 09:22:15,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:22:15,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6042 [2020-10-28 09:22:15,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:15,351 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:15,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-28 09:22:15,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:22:15,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-28 09:22:15,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:16,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:22:16,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:16,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:16,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:16,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:22:16,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:22:16,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:22:16,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:16,077 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:16,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:22:16,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:22:16,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:22:16,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:16,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 0 proven. 1162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:22:16,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1415274889] [2020-10-28 09:22:16,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:22:16,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-28 09:22:16,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045041176] [2020-10-28 09:22:16,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-28 09:22:16,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:22:16,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-28 09:22:16,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-28 09:22:16,090 INFO L87 Difference]: Start difference. First operand 105 states and 135 transitions. Second operand 32 states. [2020-10-28 09:22:16,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:22:16,910 INFO L93 Difference]: Finished difference Result 269 states and 361 transitions. [2020-10-28 09:22:16,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-28 09:22:16,911 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 100 [2020-10-28 09:22:16,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:22:16,912 INFO L225 Difference]: With dead ends: 269 [2020-10-28 09:22:16,912 INFO L226 Difference]: Without dead ends: 255 [2020-10-28 09:22:16,913 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-28 09:22:16,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-10-28 09:22:16,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 108. [2020-10-28 09:22:16,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-28 09:22:16,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 139 transitions. [2020-10-28 09:22:16,922 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 139 transitions. Word has length 100 [2020-10-28 09:22:16,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:22:16,922 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 139 transitions. [2020-10-28 09:22:16,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-28 09:22:16,922 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 139 transitions. [2020-10-28 09:22:16,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-28 09:22:16,923 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:22:16,923 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:22:16,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 09:22:16,924 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:22:16,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:22:16,924 INFO L82 PathProgramCache]: Analyzing trace with hash -2088210394, now seen corresponding path program 29 times [2020-10-28 09:22:16,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:22:16,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1466719765] [2020-10-28 09:22:16,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:22:16,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:16,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:17,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:26,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:26,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-28 09:22:26,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:22:26,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9375 [2020-10-28 09:22:26,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:26,330 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:26,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-28 09:22:26,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:22:26,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-28 09:22:26,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:27,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:22:27,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:27,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:27,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:27,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:22:27,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:22:27,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:22:27,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:27,072 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:27,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:22:27,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:22:27,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:22:27,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:27,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 0 proven. 1247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:22:27,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1466719765] [2020-10-28 09:22:27,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:22:27,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-28 09:22:27,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961527884] [2020-10-28 09:22:27,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-28 09:22:27,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:22:27,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-28 09:22:27,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 09:22:27,088 INFO L87 Difference]: Start difference. First operand 108 states and 139 transitions. Second operand 33 states. [2020-10-28 09:22:28,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:22:28,192 INFO L93 Difference]: Finished difference Result 277 states and 372 transitions. [2020-10-28 09:22:28,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-28 09:22:28,193 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 103 [2020-10-28 09:22:28,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:22:28,195 INFO L225 Difference]: With dead ends: 277 [2020-10-28 09:22:28,195 INFO L226 Difference]: Without dead ends: 263 [2020-10-28 09:22:28,196 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 09:22:28,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-10-28 09:22:28,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 111. [2020-10-28 09:22:28,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-28 09:22:28,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 143 transitions. [2020-10-28 09:22:28,205 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 143 transitions. Word has length 103 [2020-10-28 09:22:28,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:22:28,206 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 143 transitions. [2020-10-28 09:22:28,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-28 09:22:28,206 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 143 transitions. [2020-10-28 09:22:28,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-28 09:22:28,207 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:22:28,207 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:22:28,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 09:22:28,207 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:22:28,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:22:28,208 INFO L82 PathProgramCache]: Analyzing trace with hash -2096561769, now seen corresponding path program 30 times [2020-10-28 09:22:28,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:22:28,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [211571898] [2020-10-28 09:22:28,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:22:28,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:28,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:29,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:33,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:33,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-28 09:22:33,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:22:33,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5685 [2020-10-28 09:22:33,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:33,924 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:33,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-28 09:22:33,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:22:33,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-28 09:22:33,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:34,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:22:34,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:34,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:34,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:34,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:22:34,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:22:34,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:22:34,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:34,732 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:34,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:22:34,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:22:34,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:22:34,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:34,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:22:34,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [211571898] [2020-10-28 09:22:34,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:22:34,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-28 09:22:34,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522853939] [2020-10-28 09:22:34,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-28 09:22:34,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:22:34,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-28 09:22:34,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 09:22:34,747 INFO L87 Difference]: Start difference. First operand 111 states and 143 transitions. Second operand 34 states. [2020-10-28 09:22:35,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:22:35,918 INFO L93 Difference]: Finished difference Result 285 states and 383 transitions. [2020-10-28 09:22:35,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-28 09:22:35,919 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 106 [2020-10-28 09:22:35,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:22:35,921 INFO L225 Difference]: With dead ends: 285 [2020-10-28 09:22:35,921 INFO L226 Difference]: Without dead ends: 271 [2020-10-28 09:22:35,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 09:22:35,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-10-28 09:22:35,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 114. [2020-10-28 09:22:35,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-28 09:22:35,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 147 transitions. [2020-10-28 09:22:35,940 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 147 transitions. Word has length 106 [2020-10-28 09:22:35,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:22:35,940 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 147 transitions. [2020-10-28 09:22:35,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-28 09:22:35,940 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 147 transitions. [2020-10-28 09:22:35,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-28 09:22:35,941 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:22:35,941 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:22:35,942 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 09:22:35,942 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:22:35,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:22:35,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1784271226, now seen corresponding path program 31 times [2020-10-28 09:22:35,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:22:35,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1540510780] [2020-10-28 09:22:35,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:22:35,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:36,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:37,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:46,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:46,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-28 09:22:46,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:22:46,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10058 [2020-10-28 09:22:46,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:46,036 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:46,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-28 09:22:46,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:22:46,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-28 09:22:46,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:46,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:22:46,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:46,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:46,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:46,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:22:46,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:22:46,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:22:46,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:46,980 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:46,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:22:46,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:22:46,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:22:46,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:46,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 0 proven. 1426 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:22:46,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1540510780] [2020-10-28 09:22:46,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:22:46,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-28 09:22:46,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566675234] [2020-10-28 09:22:46,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-28 09:22:46,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:22:46,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-28 09:22:46,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 09:22:46,999 INFO L87 Difference]: Start difference. First operand 114 states and 147 transitions. Second operand 35 states. [2020-10-28 09:22:48,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:22:48,225 INFO L93 Difference]: Finished difference Result 293 states and 394 transitions. [2020-10-28 09:22:48,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-28 09:22:48,226 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 109 [2020-10-28 09:22:48,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:22:48,227 INFO L225 Difference]: With dead ends: 293 [2020-10-28 09:22:48,228 INFO L226 Difference]: Without dead ends: 279 [2020-10-28 09:22:48,229 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 09:22:48,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2020-10-28 09:22:48,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 117. [2020-10-28 09:22:48,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-28 09:22:48,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 151 transitions. [2020-10-28 09:22:48,237 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 151 transitions. Word has length 109 [2020-10-28 09:22:48,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:22:48,237 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 151 transitions. [2020-10-28 09:22:48,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-28 09:22:48,237 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 151 transitions. [2020-10-28 09:22:48,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-28 09:22:48,239 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:22:48,239 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:22:48,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 09:22:48,239 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:22:48,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:22:48,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1235867849, now seen corresponding path program 32 times [2020-10-28 09:22:48,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:22:48,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [89782505] [2020-10-28 09:22:48,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:22:48,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:48,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:49,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:57,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:57,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-28 09:22:57,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:22:57,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9322 [2020-10-28 09:22:57,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:57,594 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:57,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-28 09:22:57,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:22:57,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-28 09:22:57,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:58,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:22:58,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:58,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:58,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:58,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:22:58,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:22:58,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:22:58,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:58,575 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:58,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:22:58,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:22:58,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:22:58,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:58,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 0 proven. 1520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:22:58,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [89782505] [2020-10-28 09:22:58,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:22:58,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-28 09:22:58,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716699113] [2020-10-28 09:22:58,601 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-28 09:22:58,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:22:58,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-28 09:22:58,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-28 09:22:58,603 INFO L87 Difference]: Start difference. First operand 117 states and 151 transitions. Second operand 36 states. [2020-10-28 09:22:59,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:22:59,609 INFO L93 Difference]: Finished difference Result 301 states and 405 transitions. [2020-10-28 09:22:59,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-28 09:22:59,610 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 112 [2020-10-28 09:22:59,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:22:59,612 INFO L225 Difference]: With dead ends: 301 [2020-10-28 09:22:59,612 INFO L226 Difference]: Without dead ends: 287 [2020-10-28 09:22:59,613 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-28 09:22:59,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-10-28 09:22:59,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 120. [2020-10-28 09:22:59,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-28 09:22:59,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 155 transitions. [2020-10-28 09:22:59,623 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 155 transitions. Word has length 112 [2020-10-28 09:22:59,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:22:59,624 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 155 transitions. [2020-10-28 09:22:59,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-28 09:22:59,624 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 155 transitions. [2020-10-28 09:22:59,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-28 09:22:59,626 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:22:59,626 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:22:59,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 09:22:59,626 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:22:59,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:22:59,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1806457626, now seen corresponding path program 33 times [2020-10-28 09:22:59,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:22:59,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1425027938] [2020-10-28 09:22:59,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:22:59,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:59,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:00,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:17,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:17,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-28 09:23:17,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:23:17,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18157 [2020-10-28 09:23:17,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:17,818 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:17,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-28 09:23:17,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:23:17,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-28 09:23:17,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:23:18,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:23:18,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:18,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:18,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:18,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:23:18,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:23:18,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:23:18,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:18,831 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:18,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:23:18,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:23:18,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:23:18,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:23:18,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 0 proven. 1617 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:23:18,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1425027938] [2020-10-28 09:23:18,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:23:18,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-28 09:23:18,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974620324] [2020-10-28 09:23:18,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-28 09:23:18,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:23:18,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-28 09:23:18,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 09:23:18,849 INFO L87 Difference]: Start difference. First operand 120 states and 155 transitions. Second operand 37 states. [2020-10-28 09:23:20,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:23:20,205 INFO L93 Difference]: Finished difference Result 309 states and 416 transitions. [2020-10-28 09:23:20,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-28 09:23:20,206 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 115 [2020-10-28 09:23:20,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:23:20,208 INFO L225 Difference]: With dead ends: 309 [2020-10-28 09:23:20,208 INFO L226 Difference]: Without dead ends: 295 [2020-10-28 09:23:20,210 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 09:23:20,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2020-10-28 09:23:20,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 123. [2020-10-28 09:23:20,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-28 09:23:20,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 159 transitions. [2020-10-28 09:23:20,218 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 159 transitions. Word has length 115 [2020-10-28 09:23:20,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:23:20,219 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 159 transitions. [2020-10-28 09:23:20,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-28 09:23:20,219 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 159 transitions. [2020-10-28 09:23:20,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-28 09:23:20,220 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:23:20,220 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:23:20,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 09:23:20,221 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:23:20,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:23:20,221 INFO L82 PathProgramCache]: Analyzing trace with hash -765946665, now seen corresponding path program 34 times [2020-10-28 09:23:20,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:23:20,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [604384531] [2020-10-28 09:23:20,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:23:20,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:20,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:21,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:30,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:30,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-28 09:23:30,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:23:30,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10292 [2020-10-28 09:23:30,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:30,552 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:30,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-28 09:23:30,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:23:30,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-28 09:23:30,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:23:31,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:23:31,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:31,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:31,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:31,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:23:31,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:23:31,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:23:31,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:31,607 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:31,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:23:31,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:23:31,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:23:31,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:23:31,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 0 proven. 1717 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:23:31,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [604384531] [2020-10-28 09:23:31,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:23:31,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-28 09:23:31,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806919401] [2020-10-28 09:23:31,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-28 09:23:31,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:23:31,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-28 09:23:31,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-28 09:23:31,643 INFO L87 Difference]: Start difference. First operand 123 states and 159 transitions. Second operand 38 states. [2020-10-28 09:23:33,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:23:33,084 INFO L93 Difference]: Finished difference Result 317 states and 427 transitions. [2020-10-28 09:23:33,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-28 09:23:33,085 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 118 [2020-10-28 09:23:33,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:23:33,088 INFO L225 Difference]: With dead ends: 317 [2020-10-28 09:23:33,088 INFO L226 Difference]: Without dead ends: 303 [2020-10-28 09:23:33,089 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-28 09:23:33,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2020-10-28 09:23:33,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 126. [2020-10-28 09:23:33,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-28 09:23:33,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 163 transitions. [2020-10-28 09:23:33,100 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 163 transitions. Word has length 118 [2020-10-28 09:23:33,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:23:33,101 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 163 transitions. [2020-10-28 09:23:33,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-28 09:23:33,101 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 163 transitions. [2020-10-28 09:23:33,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-28 09:23:33,102 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:23:33,102 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:23:33,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-28 09:23:33,102 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:23:33,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:23:33,103 INFO L82 PathProgramCache]: Analyzing trace with hash 317117254, now seen corresponding path program 35 times [2020-10-28 09:23:33,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:23:33,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1542749039] [2020-10-28 09:23:33,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:23:33,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:33,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking...