/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --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/ldv-regression/test24-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 09:19:27,953 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 09:19:27,956 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 09:19:28,006 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 09:19:28,007 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 09:19:28,008 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 09:19:28,010 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 09:19:28,013 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 09:19:28,015 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 09:19:28,017 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 09:19:28,018 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 09:19:28,020 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 09:19:28,020 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 09:19:28,022 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 09:19:28,023 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 09:19:28,024 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 09:19:28,025 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 09:19:28,027 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 09:19:28,039 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 09:19:28,041 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 09:19:28,043 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 09:19:28,044 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 09:19:28,046 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 09:19:28,047 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 09:19:28,050 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 09:19:28,051 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 09:19:28,051 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 09:19:28,052 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 09:19:28,053 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 09:19:28,054 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 09:19:28,054 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 09:19:28,055 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 09:19:28,057 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 09:19:28,058 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 09:19:28,059 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 09:19:28,059 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 09:19:28,060 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 09:19:28,060 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 09:19:28,061 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 09:19:28,062 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 09:19:28,063 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 09:19:28,065 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 [2020-10-29 09:19:28,099 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 09:19:28,099 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 09:19:28,102 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 09:19:28,102 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 09:19:28,102 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 09:19:28,102 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 09:19:28,103 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 09:19:28,103 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 09:19:28,104 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 09:19:28,104 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 09:19:28,105 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 09:19:28,105 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 09:19:28,105 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 09:19:28,105 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 09:19:28,105 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 09:19:28,105 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 09:19:28,106 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 09:19:28,106 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 09:19:28,107 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 09:19:28,107 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 09:19:28,107 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 09:19:28,108 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 09:19:28,108 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 09:19:28,108 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 09:19:28,108 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 09:19:28,108 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 09:19:28,109 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 09:19:28,109 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 09:19:28,109 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 09:19:28,109 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 09:19:28,566 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 09:19:28,603 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 09:19:28,606 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 09:19:28,608 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 09:19:28,609 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 09:19:28,611 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test24-2.c [2020-10-29 09:19:28,698 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fecc49f72/dc164d6786834c80933914ff9cb77c9e/FLAG0c89efd37 [2020-10-29 09:19:29,328 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 09:19:29,329 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/test24-2.c [2020-10-29 09:19:29,337 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fecc49f72/dc164d6786834c80933914ff9cb77c9e/FLAG0c89efd37 [2020-10-29 09:19:29,727 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fecc49f72/dc164d6786834c80933914ff9cb77c9e [2020-10-29 09:19:29,732 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 09:19:29,741 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 09:19:29,744 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 09:19:29,744 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 09:19:29,749 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 09:19:29,751 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:19:29" (1/1) ... [2020-10-29 09:19:29,756 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c34af26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:19:29, skipping insertion in model container [2020-10-29 09:19:29,757 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:19:29" (1/1) ... [2020-10-29 09:19:29,767 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 09:19:29,788 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 09:19:30,051 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:19:30,063 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 09:19:30,100 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:19:30,119 INFO L208 MainTranslator]: Completed translation [2020-10-29 09:19:30,120 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:19:30 WrapperNode [2020-10-29 09:19:30,120 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 09:19:30,122 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 09:19:30,122 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 09:19:30,122 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 09:19:30,136 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:19:30" (1/1) ... [2020-10-29 09:19:30,136 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:19:30" (1/1) ... [2020-10-29 09:19:30,144 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:19:30" (1/1) ... [2020-10-29 09:19:30,145 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:19:30" (1/1) ... [2020-10-29 09:19:30,153 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:19:30" (1/1) ... [2020-10-29 09:19:30,158 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:19:30" (1/1) ... [2020-10-29 09:19:30,160 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:19:30" (1/1) ... [2020-10-29 09:19:30,162 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 09:19:30,163 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 09:19:30,164 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 09:19:30,164 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 09:19:30,165 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:19:30" (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 [2020-10-29 09:19:30,233 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 09:19:30,234 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 09:19:30,234 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 09:19:30,234 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-10-29 09:19:30,234 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 09:19:30,235 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 09:19:30,235 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 09:19:30,235 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 09:19:30,235 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 09:19:30,235 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 09:19:30,236 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-29 09:19:30,236 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 09:19:30,236 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 09:19:30,236 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 09:19:30,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 09:19:30,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 09:19:30,237 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 09:19:30,237 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 09:19:30,769 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 09:19:30,769 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-29 09:19:30,771 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:19:30 BoogieIcfgContainer [2020-10-29 09:19:30,771 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 09:19:30,776 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 09:19:30,776 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 09:19:30,780 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 09:19:30,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 09:19:29" (1/3) ... [2020-10-29 09:19:30,782 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@362b0fd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:19:30, skipping insertion in model container [2020-10-29 09:19:30,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:19:30" (2/3) ... [2020-10-29 09:19:30,783 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@362b0fd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:19:30, skipping insertion in model container [2020-10-29 09:19:30,783 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:19:30" (3/3) ... [2020-10-29 09:19:30,785 INFO L111 eAbstractionObserver]: Analyzing ICFG test24-2.c [2020-10-29 09:19:30,800 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 09:19:30,807 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 09:19:30,852 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 09:19:30,889 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 09:19:30,889 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 09:19:30,889 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 09:19:30,889 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 09:19:30,889 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 09:19:30,890 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 09:19:30,890 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 09:19:30,890 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 09:19:30,916 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-10-29 09:19:30,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-29 09:19:30,923 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:19:30,924 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:19:30,924 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:19:30,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:19:30,934 INFO L82 PathProgramCache]: Analyzing trace with hash -748858587, now seen corresponding path program 1 times [2020-10-29 09:19:30,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:19:30,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1232652152] [2020-10-29 09:19:30,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:19:31,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:31,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:31,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:31,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:31,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-29 09:19:31,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:19:31,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 399 [2020-10-29 09:19:31,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:31,553 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:31,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:19:31,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:19:31,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 09:19:31,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 09:19:31,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:19:31,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:31,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:31,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:31,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:19:31,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:19:31,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 09:19:31,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:31,657 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:31,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:19:31,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:19:31,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:19:31,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:19:31,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-29 09:19:31,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:31,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:31,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:31,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:19:31,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:19:31,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:19:31,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:31,678 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:31,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:19:31,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 09:19:31,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:19:31,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:19:31,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:19:31,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1232652152] [2020-10-29 09:19:31,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:19:31,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:19:31,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846758469] [2020-10-29 09:19:31,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:19:31,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:19:31,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:19:31,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:19:31,713 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 4 states. [2020-10-29 09:19:31,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:19:31,822 INFO L93 Difference]: Finished difference Result 49 states and 60 transitions. [2020-10-29 09:19:31,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:19:31,824 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-29 09:19:31,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:19:31,832 INFO L225 Difference]: With dead ends: 49 [2020-10-29 09:19:31,832 INFO L226 Difference]: Without dead ends: 23 [2020-10-29 09:19:31,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:19:31,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-29 09:19:31,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-10-29 09:19:31,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-29 09:19:31,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-10-29 09:19:31,881 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 18 [2020-10-29 09:19:31,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:19:31,881 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-10-29 09:19:31,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:19:31,882 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-10-29 09:19:31,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-29 09:19:31,883 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:19:31,883 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:19:31,883 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 09:19:31,884 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:19:31,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:19:31,885 INFO L82 PathProgramCache]: Analyzing trace with hash 362883760, now seen corresponding path program 1 times [2020-10-29 09:19:31,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:19:31,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [997905960] [2020-10-29 09:19:31,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:19:31,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:31,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:32,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:32,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-29 09:19:32,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:19:32,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 206 [2020-10-29 09:19:32,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:32,112 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:32,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 09:19:32,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:19:32,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-29 09:19:32,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:19:32,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:19:32,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:32,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:32,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:32,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:19:32,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:19:32,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 09:19:32,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:32,190 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:32,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:19:32,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:19:32,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:19:32,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:19:32,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-29 09:19:32,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:32,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:32,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:32,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:19:32,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:19:32,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:19:32,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:32,208 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:32,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:19:32,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 09:19:32,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:19:32,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:19:32,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:19:32,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [997905960] [2020-10-29 09:19:32,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:19:32,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-29 09:19:32,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646773150] [2020-10-29 09:19:32,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 09:19:32,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:19:32,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 09:19:32,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:19:32,221 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 5 states. [2020-10-29 09:19:32,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:19:32,310 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-10-29 09:19:32,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 09:19:32,311 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-10-29 09:19:32,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:19:32,312 INFO L225 Difference]: With dead ends: 38 [2020-10-29 09:19:32,312 INFO L226 Difference]: Without dead ends: 25 [2020-10-29 09:19:32,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:19:32,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-29 09:19:32,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-10-29 09:19:32,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-29 09:19:32,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-10-29 09:19:32,323 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 21 [2020-10-29 09:19:32,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:19:32,324 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-10-29 09:19:32,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 09:19:32,324 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-10-29 09:19:32,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-29 09:19:32,325 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:19:32,325 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:19:32,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 09:19:32,326 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:19:32,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:19:32,327 INFO L82 PathProgramCache]: Analyzing trace with hash -454672690, now seen corresponding path program 2 times [2020-10-29 09:19:32,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:19:32,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [661025053] [2020-10-29 09:19:32,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:19:32,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:32,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:32,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:32,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-29 09:19:32,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:19:32,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 161 [2020-10-29 09:19:32,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:32,532 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:32,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:19:32,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:19:32,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 09:19:32,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:19:32,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:19:32,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:32,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:32,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:32,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:19:32,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:19:32,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 09:19:32,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:32,622 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:32,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:19:32,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:19:32,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:19:32,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:19:32,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-29 09:19:32,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:32,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:32,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:32,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:19:32,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:19:32,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:19:32,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:32,636 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:32,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:19:32,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 09:19:32,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:19:32,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:19:32,641 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:19:32,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [661025053] [2020-10-29 09:19:32,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:19:32,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 09:19:32,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087444307] [2020-10-29 09:19:32,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 09:19:32,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:19:32,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 09:19:32,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:19:32,645 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 6 states. [2020-10-29 09:19:32,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:19:32,731 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2020-10-29 09:19:32,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 09:19:32,731 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-10-29 09:19:32,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:19:32,733 INFO L225 Difference]: With dead ends: 40 [2020-10-29 09:19:32,733 INFO L226 Difference]: Without dead ends: 27 [2020-10-29 09:19:32,734 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:19:32,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-29 09:19:32,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-10-29 09:19:32,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-29 09:19:32,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-10-29 09:19:32,742 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 23 [2020-10-29 09:19:32,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:19:32,743 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-10-29 09:19:32,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 09:19:32,743 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-10-29 09:19:32,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-29 09:19:32,744 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:19:32,744 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:19:32,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 09:19:32,745 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:19:32,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:19:32,746 INFO L82 PathProgramCache]: Analyzing trace with hash -147405972, now seen corresponding path program 3 times [2020-10-29 09:19:32,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:19:32,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [502697158] [2020-10-29 09:19:32,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:19:32,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:32,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:32,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:32,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-29 09:19:32,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:19:32,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 167 [2020-10-29 09:19:32,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:32,932 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:32,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 09:19:32,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:19:32,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-29 09:19:32,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:19:33,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:19:33,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:33,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:33,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:33,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:19:33,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:19:33,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:19:33,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:33,031 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:33,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:19:33,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:19:33,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:19:33,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:19:33,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-29 09:19:33,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:33,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:33,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:33,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:19:33,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:19:33,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:19:33,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:33,043 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:33,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:19:33,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 09:19:33,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:19:33,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:19:33,048 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:19:33,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [502697158] [2020-10-29 09:19:33,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:19:33,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 09:19:33,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943097924] [2020-10-29 09:19:33,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 09:19:33,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:19:33,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 09:19:33,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:19:33,051 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 7 states. [2020-10-29 09:19:33,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:19:33,141 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-10-29 09:19:33,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 09:19:33,142 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-10-29 09:19:33,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:19:33,143 INFO L225 Difference]: With dead ends: 42 [2020-10-29 09:19:33,143 INFO L226 Difference]: Without dead ends: 29 [2020-10-29 09:19:33,144 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:19:33,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-29 09:19:33,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-10-29 09:19:33,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-29 09:19:33,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-10-29 09:19:33,151 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 25 [2020-10-29 09:19:33,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:19:33,151 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-10-29 09:19:33,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 09:19:33,152 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-10-29 09:19:33,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-29 09:19:33,153 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:19:33,153 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:19:33,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 09:19:33,153 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:19:33,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:19:33,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1216833398, now seen corresponding path program 4 times [2020-10-29 09:19:33,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:19:33,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1469595460] [2020-10-29 09:19:33,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:19:33,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:33,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:33,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:33,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-29 09:19:33,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:19:33,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 214 [2020-10-29 09:19:33,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:33,387 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:33,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:19:33,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:19:33,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-29 09:19:33,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:19:33,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:19:33,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:33,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:33,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:33,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:19:33,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:19:33,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:19:33,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:33,476 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:33,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:19:33,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:19:33,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:19:33,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:19:33,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-29 09:19:33,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:33,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:33,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:33,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:19:33,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:19:33,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:19:33,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:33,487 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:33,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:19:33,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 09:19:33,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:19:33,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:19:33,492 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:19:33,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1469595460] [2020-10-29 09:19:33,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:19:33,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:19:33,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160788774] [2020-10-29 09:19:33,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:19:33,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:19:33,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:19:33,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:19:33,498 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 8 states. [2020-10-29 09:19:33,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:19:33,605 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2020-10-29 09:19:33,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:19:33,606 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-10-29 09:19:33,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:19:33,607 INFO L225 Difference]: With dead ends: 44 [2020-10-29 09:19:33,607 INFO L226 Difference]: Without dead ends: 31 [2020-10-29 09:19:33,608 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:19:33,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-29 09:19:33,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-10-29 09:19:33,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-29 09:19:33,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-10-29 09:19:33,615 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 27 [2020-10-29 09:19:33,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:19:33,615 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-10-29 09:19:33,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:19:33,615 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-10-29 09:19:33,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-29 09:19:33,616 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:19:33,616 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:19:33,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 09:19:33,617 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:19:33,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:19:33,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1855561256, now seen corresponding path program 5 times [2020-10-29 09:19:33,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:19:33,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [11516375] [2020-10-29 09:19:33,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:19:33,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:33,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:33,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:33,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-29 09:19:33,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:19:33,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 227 [2020-10-29 09:19:33,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:33,864 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:33,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:19:33,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:19:33,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 09:19:33,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:19:33,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:19:33,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:33,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:33,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:33,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:19:33,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:19:33,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:19:33,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:33,958 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:33,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:19:33,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:19:33,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:19:33,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:19:33,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-29 09:19:33,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:33,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:33,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:33,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:19:33,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:19:33,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:19:33,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:33,971 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:33,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:19:33,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 09:19:33,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:19:33,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:19:33,978 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:19:33,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [11516375] [2020-10-29 09:19:33,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:19:33,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:19:33,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567749512] [2020-10-29 09:19:33,981 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:19:33,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:19:33,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:19:33,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:19:33,983 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 9 states. [2020-10-29 09:19:34,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:19:34,102 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2020-10-29 09:19:34,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:19:34,116 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-10-29 09:19:34,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:19:34,117 INFO L225 Difference]: With dead ends: 46 [2020-10-29 09:19:34,118 INFO L226 Difference]: Without dead ends: 33 [2020-10-29 09:19:34,121 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:19:34,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-29 09:19:34,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-10-29 09:19:34,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-29 09:19:34,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-10-29 09:19:34,132 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 29 [2020-10-29 09:19:34,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:19:34,133 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-10-29 09:19:34,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:19:34,133 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-10-29 09:19:34,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-29 09:19:34,136 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:19:34,136 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:19:34,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 09:19:34,137 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:19:34,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:19:34,137 INFO L82 PathProgramCache]: Analyzing trace with hash -510675898, now seen corresponding path program 6 times [2020-10-29 09:19:34,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:19:34,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1454037971] [2020-10-29 09:19:34,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:19:34,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:34,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:34,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:34,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-29 09:19:34,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:19:34,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 315 [2020-10-29 09:19:34,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:34,477 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:34,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:19:34,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:19:34,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 09:19:34,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:19:34,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:19:34,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:34,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:34,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:34,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:19:34,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:19:34,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:19:34,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:34,577 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:34,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:19:34,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:19:34,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:19:34,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:19:34,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-29 09:19:34,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:34,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:34,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:34,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:19:34,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:19:34,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:19:34,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:34,587 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:34,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:19:34,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 09:19:34,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:19:34,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:19:34,592 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:19:34,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1454037971] [2020-10-29 09:19:34,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:19:34,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:19:34,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364732702] [2020-10-29 09:19:34,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:19:34,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:19:34,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:19:34,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:19:34,595 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 10 states. [2020-10-29 09:19:34,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:19:34,686 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-10-29 09:19:34,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:19:34,686 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-10-29 09:19:34,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:19:34,687 INFO L225 Difference]: With dead ends: 48 [2020-10-29 09:19:34,687 INFO L226 Difference]: Without dead ends: 35 [2020-10-29 09:19:34,688 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:19:34,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-29 09:19:34,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-10-29 09:19:34,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-29 09:19:34,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2020-10-29 09:19:34,694 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 31 [2020-10-29 09:19:34,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:19:34,695 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2020-10-29 09:19:34,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:19:34,695 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2020-10-29 09:19:34,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-29 09:19:34,696 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:19:34,696 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:19:34,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 09:19:34,696 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:19:34,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:19:34,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1868085988, now seen corresponding path program 7 times [2020-10-29 09:19:34,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:19:34,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2075393410] [2020-10-29 09:19:34,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:19:34,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:34,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:35,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:35,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 09:19:35,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:19:35,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 339 [2020-10-29 09:19:35,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:35,054 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:35,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:19:35,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:19:35,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 09:19:35,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:19:35,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:19:35,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:35,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:35,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:35,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:19:35,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:19:35,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:19:35,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:35,160 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:35,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:19:35,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:19:35,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:19:35,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:19:35,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-29 09:19:35,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:35,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:35,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:35,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:19:35,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:19:35,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:19:35,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:35,173 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:35,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:19:35,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 09:19:35,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:19:35,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:19:35,177 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:19:35,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2075393410] [2020-10-29 09:19:35,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:19:35,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:19:35,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139969891] [2020-10-29 09:19:35,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:19:35,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:19:35,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:19:35,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:19:35,180 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 11 states. [2020-10-29 09:19:35,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:19:35,266 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2020-10-29 09:19:35,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:19:35,267 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2020-10-29 09:19:35,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:19:35,268 INFO L225 Difference]: With dead ends: 50 [2020-10-29 09:19:35,268 INFO L226 Difference]: Without dead ends: 37 [2020-10-29 09:19:35,268 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:19:35,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-29 09:19:35,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-10-29 09:19:35,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-29 09:19:35,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-10-29 09:19:35,274 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 33 [2020-10-29 09:19:35,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:19:35,274 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-10-29 09:19:35,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:19:35,275 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-10-29 09:19:35,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-29 09:19:35,275 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:19:35,276 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:19:35,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 09:19:35,276 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:19:35,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:19:35,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1359310334, now seen corresponding path program 8 times [2020-10-29 09:19:35,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:19:35,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2052901875] [2020-10-29 09:19:35,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:19:35,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:35,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:35,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:35,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-29 09:19:35,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:19:35,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 441 [2020-10-29 09:19:35,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:35,736 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:35,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:19:35,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:19:35,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-29 09:19:35,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:19:35,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:19:35,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:35,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:35,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:35,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:19:35,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:19:35,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:19:35,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:35,931 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:35,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:19:35,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:19:35,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:19:35,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:19:35,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-29 09:19:35,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:35,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:35,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:35,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:19:35,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:19:35,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:19:35,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:35,944 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:35,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:19:35,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 09:19:35,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:19:35,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:19:35,949 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:19:35,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2052901875] [2020-10-29 09:19:35,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:19:35,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:19:35,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876103571] [2020-10-29 09:19:35,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:19:35,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:19:35,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:19:35,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:19:35,953 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 12 states. [2020-10-29 09:19:36,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:19:36,108 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2020-10-29 09:19:36,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 09:19:36,109 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2020-10-29 09:19:36,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:19:36,111 INFO L225 Difference]: With dead ends: 52 [2020-10-29 09:19:36,111 INFO L226 Difference]: Without dead ends: 39 [2020-10-29 09:19:36,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:19:36,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-29 09:19:36,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-10-29 09:19:36,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-29 09:19:36,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-10-29 09:19:36,118 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 35 [2020-10-29 09:19:36,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:19:36,119 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-10-29 09:19:36,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:19:36,119 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-10-29 09:19:36,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-29 09:19:36,120 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:19:36,120 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:19:36,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 09:19:36,120 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:19:36,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:19:36,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1920788064, now seen corresponding path program 9 times [2020-10-29 09:19:36,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:19:36,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1252107786] [2020-10-29 09:19:36,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:19:36,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:36,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:36,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:36,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-29 09:19:36,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:19:36,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 557 [2020-10-29 09:19:36,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:36,700 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:36,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:19:36,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:19:36,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-29 09:19:36,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:19:36,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:19:36,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:36,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:36,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:36,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:19:36,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:19:36,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 09:19:36,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:36,876 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:36,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:19:36,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:19:36,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:19:36,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:19:36,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-29 09:19:36,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:36,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:36,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:36,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:19:36,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:19:36,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:19:36,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:36,886 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:36,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:19:36,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 09:19:36,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:19:36,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:19:36,893 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:19:36,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1252107786] [2020-10-29 09:19:36,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:19:36,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:19:36,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586208783] [2020-10-29 09:19:36,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:19:36,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:19:36,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:19:36,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:19:36,897 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 13 states. [2020-10-29 09:19:37,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:19:37,044 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2020-10-29 09:19:37,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:19:37,045 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-10-29 09:19:37,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:19:37,046 INFO L225 Difference]: With dead ends: 54 [2020-10-29 09:19:37,049 INFO L226 Difference]: Without dead ends: 41 [2020-10-29 09:19:37,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:19:37,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-29 09:19:37,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2020-10-29 09:19:37,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-29 09:19:37,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2020-10-29 09:19:37,059 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 37 [2020-10-29 09:19:37,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:19:37,060 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2020-10-29 09:19:37,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:19:37,060 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2020-10-29 09:19:37,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-29 09:19:37,064 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:19:37,064 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:19:37,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 09:19:37,064 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:19:37,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:19:37,065 INFO L82 PathProgramCache]: Analyzing trace with hash -335007298, now seen corresponding path program 10 times [2020-10-29 09:19:37,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:19:37,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1171405652] [2020-10-29 09:19:37,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:19:37,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:37,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:37,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:37,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-29 09:19:37,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:19:37,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 736 [2020-10-29 09:19:37,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:37,823 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:37,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:19:37,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:19:37,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-29 09:19:37,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:19:38,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:19:38,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:38,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:38,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:38,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:19:38,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:19:38,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:19:38,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:38,016 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:38,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:19:38,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:19:38,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:19:38,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:19:38,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-29 09:19:38,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:38,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:38,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:38,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:19:38,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:19:38,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:19:38,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:38,031 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:38,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:19:38,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 09:19:38,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:19:38,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:19:38,037 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:19:38,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1171405652] [2020-10-29 09:19:38,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:19:38,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:19:38,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998210288] [2020-10-29 09:19:38,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:19:38,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:19:38,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:19:38,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:19:38,040 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 14 states. [2020-10-29 09:19:38,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:19:38,218 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2020-10-29 09:19:38,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:19:38,219 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 39 [2020-10-29 09:19:38,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:19:38,220 INFO L225 Difference]: With dead ends: 56 [2020-10-29 09:19:38,220 INFO L226 Difference]: Without dead ends: 43 [2020-10-29 09:19:38,221 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:19:38,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-29 09:19:38,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-10-29 09:19:38,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-29 09:19:38,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-10-29 09:19:38,232 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 39 [2020-10-29 09:19:38,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:19:38,232 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-10-29 09:19:38,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:19:38,232 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-10-29 09:19:38,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-29 09:19:38,233 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:19:38,233 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:19:38,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 09:19:38,233 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:19:38,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:19:38,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1113081252, now seen corresponding path program 11 times [2020-10-29 09:19:38,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:19:38,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [867516768] [2020-10-29 09:19:38,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:19:38,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:38,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:39,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:39,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-29 09:19:39,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:19:39,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 801 [2020-10-29 09:19:39,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:39,066 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:39,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:19:39,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:19:39,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-29 09:19:39,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:19:39,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:19:39,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:39,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:39,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:39,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:19:39,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:19:39,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:19:39,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:39,265 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:39,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:19:39,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:19:39,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:19:39,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:19:39,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-29 09:19:39,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:39,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:39,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:39,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:19:39,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:19:39,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:19:39,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:39,275 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:39,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:19:39,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 09:19:39,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:19:39,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:19:39,281 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:19:39,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [867516768] [2020-10-29 09:19:39,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:19:39,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:19:39,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66560964] [2020-10-29 09:19:39,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:19:39,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:19:39,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:19:39,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:19:39,284 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 15 states. [2020-10-29 09:19:39,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:19:39,423 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2020-10-29 09:19:39,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 09:19:39,424 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 41 [2020-10-29 09:19:39,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:19:39,425 INFO L225 Difference]: With dead ends: 58 [2020-10-29 09:19:39,425 INFO L226 Difference]: Without dead ends: 45 [2020-10-29 09:19:39,426 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:19:39,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-29 09:19:39,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-10-29 09:19:39,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-29 09:19:39,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2020-10-29 09:19:39,432 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 41 [2020-10-29 09:19:39,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:19:39,432 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2020-10-29 09:19:39,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:19:39,432 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2020-10-29 09:19:39,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-29 09:19:39,433 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:19:39,433 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:19:39,433 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 09:19:39,434 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:19:39,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:19:39,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1517841542, now seen corresponding path program 12 times [2020-10-29 09:19:39,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:19:39,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [542467934] [2020-10-29 09:19:39,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:19:39,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:39,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:40,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:40,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-29 09:19:40,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:19:40,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 890 [2020-10-29 09:19:40,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:40,346 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:40,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:19:40,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:19:40,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-29 09:19:40,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:19:40,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:19:40,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:40,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:40,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:40,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:19:40,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:19:40,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:19:40,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:40,558 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:40,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:19:40,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:19:40,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:19:40,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:19:40,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-29 09:19:40,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:40,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:40,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:40,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:19:40,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:19:40,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:19:40,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:40,567 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:40,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:19:40,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 09:19:40,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:19:40,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:19:40,572 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:19:40,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [542467934] [2020-10-29 09:19:40,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:19:40,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 09:19:40,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960545124] [2020-10-29 09:19:40,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 09:19:40,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:19:40,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 09:19:40,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:19:40,575 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 16 states. [2020-10-29 09:19:40,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:19:40,674 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2020-10-29 09:19:40,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 09:19:40,675 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 43 [2020-10-29 09:19:40,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:19:40,676 INFO L225 Difference]: With dead ends: 60 [2020-10-29 09:19:40,676 INFO L226 Difference]: Without dead ends: 47 [2020-10-29 09:19:40,676 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:19:40,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-29 09:19:40,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-10-29 09:19:40,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-29 09:19:40,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2020-10-29 09:19:40,682 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 43 [2020-10-29 09:19:40,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:19:40,682 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2020-10-29 09:19:40,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 09:19:40,682 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2020-10-29 09:19:40,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-29 09:19:40,683 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:19:40,683 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:19:40,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 09:19:40,684 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:19:40,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:19:40,684 INFO L82 PathProgramCache]: Analyzing trace with hash 349543704, now seen corresponding path program 13 times [2020-10-29 09:19:40,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:19:40,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [959110185] [2020-10-29 09:19:40,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:19:40,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:40,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:41,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:41,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-29 09:19:41,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:19:41,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1032 [2020-10-29 09:19:41,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:41,737 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:41,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 09:19:41,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:19:41,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-29 09:19:41,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:19:41,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:19:41,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:41,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:41,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:41,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:19:41,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:19:41,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:19:41,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:41,998 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:41,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:19:41,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:19:41,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:19:41,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:19:42,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-29 09:19:42,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:42,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:42,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:42,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:19:42,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:19:42,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:19:42,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:42,010 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:42,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:19:42,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 09:19:42,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:19:42,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:19:42,020 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:19:42,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [959110185] [2020-10-29 09:19:42,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:19:42,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 09:19:42,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646092940] [2020-10-29 09:19:42,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 09:19:42,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:19:42,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 09:19:42,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:19:42,023 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 17 states. [2020-10-29 09:19:42,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:19:42,213 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2020-10-29 09:19:42,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 09:19:42,214 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 45 [2020-10-29 09:19:42,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:19:42,215 INFO L225 Difference]: With dead ends: 62 [2020-10-29 09:19:42,215 INFO L226 Difference]: Without dead ends: 49 [2020-10-29 09:19:42,216 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:19:42,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-29 09:19:42,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-10-29 09:19:42,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-29 09:19:42,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-10-29 09:19:42,220 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 45 [2020-10-29 09:19:42,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:19:42,221 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-10-29 09:19:42,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 09:19:42,221 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-10-29 09:19:42,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-29 09:19:42,222 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:19:42,222 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:19:42,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 09:19:42,222 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:19:42,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:19:42,223 INFO L82 PathProgramCache]: Analyzing trace with hash -389564618, now seen corresponding path program 14 times [2020-10-29 09:19:42,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:19:42,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1885748283] [2020-10-29 09:19:42,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:19:42,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:42,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:43,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:43,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-29 09:19:43,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:19:43,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1215 [2020-10-29 09:19:43,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:43,461 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:43,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 09:19:43,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:19:43,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 09:19:43,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:19:43,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:19:43,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:43,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:43,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:43,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:19:43,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:19:43,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:19:43,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:43,728 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:43,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:19:43,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:19:43,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:19:43,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:19:43,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-29 09:19:43,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:43,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:43,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:43,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:19:43,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:19:43,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:19:43,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:43,739 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:43,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:19:43,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 09:19:43,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:19:43,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:19:43,748 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:19:43,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1885748283] [2020-10-29 09:19:43,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:19:43,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 09:19:43,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249064101] [2020-10-29 09:19:43,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 09:19:43,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:19:43,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 09:19:43,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:19:43,751 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 18 states. [2020-10-29 09:19:43,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:19:43,919 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2020-10-29 09:19:43,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 09:19:43,920 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 47 [2020-10-29 09:19:43,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:19:43,921 INFO L225 Difference]: With dead ends: 64 [2020-10-29 09:19:43,921 INFO L226 Difference]: Without dead ends: 51 [2020-10-29 09:19:43,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:19:43,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-29 09:19:43,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2020-10-29 09:19:43,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-29 09:19:43,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2020-10-29 09:19:43,932 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 47 [2020-10-29 09:19:43,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:19:43,934 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2020-10-29 09:19:43,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 09:19:43,935 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2020-10-29 09:19:43,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-29 09:19:43,935 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:19:43,935 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:19:43,936 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 09:19:43,936 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:19:43,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:19:43,938 INFO L82 PathProgramCache]: Analyzing trace with hash -2003058220, now seen corresponding path program 15 times [2020-10-29 09:19:43,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:19:43,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1104648444] [2020-10-29 09:19:43,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:19:43,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:43,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:45,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:45,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-29 09:19:45,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:19:45,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1381 [2020-10-29 09:19:45,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:45,347 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:45,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-29 09:19:45,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:19:45,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-29 09:19:45,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:19:45,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:19:45,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:45,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:45,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:45,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:19:45,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:19:45,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:19:45,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:45,623 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:45,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:19:45,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:19:45,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:19:45,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:19:45,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-29 09:19:45,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:45,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:45,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:45,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:19:45,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:19:45,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:19:45,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:45,631 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:45,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:19:45,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 09:19:45,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:19:45,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:19:45,637 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:19:45,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1104648444] [2020-10-29 09:19:45,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:19:45,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-29 09:19:45,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733265813] [2020-10-29 09:19:45,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-29 09:19:45,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:19:45,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-29 09:19:45,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:19:45,640 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 19 states. [2020-10-29 09:19:45,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:19:45,802 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2020-10-29 09:19:45,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 09:19:45,803 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 49 [2020-10-29 09:19:45,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:19:45,803 INFO L225 Difference]: With dead ends: 66 [2020-10-29 09:19:45,804 INFO L226 Difference]: Without dead ends: 53 [2020-10-29 09:19:45,804 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:19:45,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-29 09:19:45,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2020-10-29 09:19:45,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-29 09:19:45,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2020-10-29 09:19:45,809 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 49 [2020-10-29 09:19:45,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:19:45,810 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2020-10-29 09:19:45,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-29 09:19:45,810 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2020-10-29 09:19:45,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-29 09:19:45,810 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:19:45,810 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:19:45,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 09:19:45,811 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:19:45,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:19:45,811 INFO L82 PathProgramCache]: Analyzing trace with hash -2087215886, now seen corresponding path program 16 times [2020-10-29 09:19:45,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:19:45,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1493192499] [2020-10-29 09:19:45,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:19:45,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:45,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:47,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:47,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-29 09:19:47,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:19:47,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1772 [2020-10-29 09:19:47,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:47,607 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:47,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-29 09:19:47,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:19:47,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-29 09:19:47,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:19:47,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:19:47,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:47,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:47,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:47,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:19:47,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:19:47,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:19:47,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:47,925 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:47,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:19:47,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:19:47,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:19:47,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:19:47,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-29 09:19:47,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:47,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:47,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:47,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:19:47,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:19:47,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:19:47,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:47,935 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:47,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:19:47,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 09:19:47,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:19:47,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:19:47,949 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:19:47,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1493192499] [2020-10-29 09:19:47,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:19:47,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-29 09:19:47,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888201540] [2020-10-29 09:19:47,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-29 09:19:47,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:19:47,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-29 09:19:47,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:19:47,952 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 20 states. [2020-10-29 09:19:48,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:19:48,142 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2020-10-29 09:19:48,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 09:19:48,142 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 51 [2020-10-29 09:19:48,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:19:48,144 INFO L225 Difference]: With dead ends: 68 [2020-10-29 09:19:48,144 INFO L226 Difference]: Without dead ends: 55 [2020-10-29 09:19:48,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:19:48,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-29 09:19:48,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2020-10-29 09:19:48,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-29 09:19:48,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-10-29 09:19:48,157 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 51 [2020-10-29 09:19:48,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:19:48,158 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-10-29 09:19:48,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-29 09:19:48,159 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-10-29 09:19:48,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-29 09:19:48,159 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:19:48,160 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:19:48,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 09:19:48,160 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:19:48,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:19:48,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1358354288, now seen corresponding path program 17 times [2020-10-29 09:19:48,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:19:48,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [496779410] [2020-10-29 09:19:48,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:19:48,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:48,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:49,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:49,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-29 09:19:49,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:19:49,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1699 [2020-10-29 09:19:49,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:49,889 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:49,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-29 09:19:49,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:19:49,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-29 09:19:49,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:19:50,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:19:50,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:50,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:50,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:50,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:19:50,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:19:50,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:19:50,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:50,252 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:50,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:19:50,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:19:50,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:19:50,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:19:50,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-29 09:19:50,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:50,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:50,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:50,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:19:50,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:19:50,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:19:50,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:50,262 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:50,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:19:50,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 09:19:50,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:19:50,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:19:50,268 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:19:50,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [496779410] [2020-10-29 09:19:50,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:19:50,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-29 09:19:50,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498536777] [2020-10-29 09:19:50,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-29 09:19:50,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:19:50,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-29 09:19:50,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:19:50,271 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 21 states. [2020-10-29 09:19:50,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:19:50,484 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2020-10-29 09:19:50,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 09:19:50,485 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 53 [2020-10-29 09:19:50,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:19:50,486 INFO L225 Difference]: With dead ends: 70 [2020-10-29 09:19:50,486 INFO L226 Difference]: Without dead ends: 57 [2020-10-29 09:19:50,487 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:19:50,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-29 09:19:50,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2020-10-29 09:19:50,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-29 09:19:50,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2020-10-29 09:19:50,493 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 53 [2020-10-29 09:19:50,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:19:50,493 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2020-10-29 09:19:50,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-29 09:19:50,494 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2020-10-29 09:19:50,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-29 09:19:50,494 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:19:50,494 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:19:50,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 09:19:50,495 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:19:50,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:19:50,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1002027858, now seen corresponding path program 18 times [2020-10-29 09:19:50,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:19:50,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1415125621] [2020-10-29 09:19:50,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:19:50,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:50,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:52,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:52,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-29 09:19:52,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:19:52,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1920 [2020-10-29 09:19:52,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:52,440 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:52,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-29 09:19:52,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:19:52,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-29 09:19:52,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:19:52,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:19:52,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:52,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:52,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:52,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:19:52,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:19:52,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:19:52,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:52,871 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:52,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:19:52,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:19:52,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:19:52,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:19:52,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-29 09:19:52,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:52,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:52,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:52,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:19:52,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:19:52,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:19:52,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:52,884 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:52,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:19:52,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 09:19:52,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:19:52,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:19:52,897 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:19:52,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1415125621] [2020-10-29 09:19:52,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:19:52,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-29 09:19:52,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820070670] [2020-10-29 09:19:52,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-29 09:19:52,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:19:52,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-29 09:19:52,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-29 09:19:52,903 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 22 states. [2020-10-29 09:19:53,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:19:53,073 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2020-10-29 09:19:53,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 09:19:53,074 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 55 [2020-10-29 09:19:53,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:19:53,074 INFO L225 Difference]: With dead ends: 72 [2020-10-29 09:19:53,075 INFO L226 Difference]: Without dead ends: 59 [2020-10-29 09:19:53,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-29 09:19:53,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-29 09:19:53,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2020-10-29 09:19:53,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-29 09:19:53,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2020-10-29 09:19:53,085 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 55 [2020-10-29 09:19:53,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:19:53,085 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2020-10-29 09:19:53,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-29 09:19:53,086 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2020-10-29 09:19:53,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-29 09:19:53,087 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:19:53,087 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:19:53,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 09:19:53,088 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:19:53,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:19:53,088 INFO L82 PathProgramCache]: Analyzing trace with hash 2125254988, now seen corresponding path program 19 times [2020-10-29 09:19:53,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:19:53,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [826520620] [2020-10-29 09:19:53,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:19:53,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:53,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:55,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:55,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-29 09:19:55,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:19:55,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2196 [2020-10-29 09:19:55,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:55,321 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:55,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-29 09:19:55,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:19:55,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-29 09:19:55,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:19:55,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:19:55,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:55,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:55,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:55,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:19:55,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:19:55,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:19:55,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:55,738 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:55,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:19:55,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:19:55,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:19:55,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:19:55,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-29 09:19:55,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:55,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:55,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:55,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:19:55,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:19:55,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:19:55,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:55,746 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:55,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:19:55,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 09:19:55,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:19:55,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:19:55,754 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:19:55,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [826520620] [2020-10-29 09:19:55,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:19:55,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-29 09:19:55,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715200447] [2020-10-29 09:19:55,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-29 09:19:55,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:19:55,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-29 09:19:55,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:19:55,757 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 23 states. [2020-10-29 09:19:55,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:19:55,962 INFO L93 Difference]: Finished difference Result 73 states and 75 transitions. [2020-10-29 09:19:55,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-29 09:19:55,962 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 57 [2020-10-29 09:19:55,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:19:55,963 INFO L225 Difference]: With dead ends: 73 [2020-10-29 09:19:55,963 INFO L226 Difference]: Without dead ends: 60 [2020-10-29 09:19:55,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:19:55,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-29 09:19:55,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-10-29 09:19:55,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-29 09:19:55,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-10-29 09:19:55,969 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 57 [2020-10-29 09:19:55,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:19:55,969 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-10-29 09:19:55,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-29 09:19:55,969 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-10-29 09:19:55,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-29 09:19:55,974 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:19:55,975 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:19:55,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-29 09:19:55,975 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:19:55,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:19:55,976 INFO L82 PathProgramCache]: Analyzing trace with hash 966962794, now seen corresponding path program 20 times [2020-10-29 09:19:55,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:19:55,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [880696257] [2020-10-29 09:19:55,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:19:56,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-29 09:19:56,068 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-29 09:19:56,068 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-29 09:19:56,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-29 09:19:56,114 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.10 09:19:56 BoogieIcfgContainer [2020-10-29 09:19:56,114 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-29 09:19:56,124 INFO L168 Benchmark]: Toolchain (without parser) took 26380.56 ms. Allocated memory was 159.4 MB in the beginning and 475.0 MB in the end (delta: 315.6 MB). Free memory was 134.7 MB in the beginning and 439.0 MB in the end (delta: -304.3 MB). Peak memory consumption was 276.9 MB. Max. memory is 8.0 GB. [2020-10-29 09:19:56,125 INFO L168 Benchmark]: CDTParser took 0.62 ms. Allocated memory is still 159.4 MB. Free memory is still 131.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-29 09:19:56,130 INFO L168 Benchmark]: CACSL2BoogieTranslator took 377.27 ms. Allocated memory is still 159.4 MB. Free memory was 134.1 MB in the beginning and 124.4 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-10-29 09:19:56,131 INFO L168 Benchmark]: Boogie Preprocessor took 40.92 ms. Allocated memory is still 159.4 MB. Free memory was 124.4 MB in the beginning and 122.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-29 09:19:56,137 INFO L168 Benchmark]: RCFGBuilder took 607.96 ms. Allocated memory is still 159.4 MB. Free memory was 122.8 MB in the beginning and 108.1 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2020-10-29 09:19:56,137 INFO L168 Benchmark]: TraceAbstraction took 25338.03 ms. Allocated memory was 159.4 MB in the beginning and 475.0 MB in the end (delta: 315.6 MB). Free memory was 107.6 MB in the beginning and 439.0 MB in the end (delta: -331.4 MB). Peak memory consumption was 249.6 MB. Max. memory is 8.0 GB. [2020-10-29 09:19:56,140 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.62 ms. Allocated memory is still 159.4 MB. Free memory is still 131.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 377.27 ms. Allocated memory is still 159.4 MB. Free memory was 134.1 MB in the beginning and 124.4 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 40.92 ms. Allocated memory is still 159.4 MB. Free memory was 124.4 MB in the beginning and 122.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 607.96 ms. Allocated memory is still 159.4 MB. Free memory was 122.8 MB in the beginning and 108.1 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 25338.03 ms. Allocated memory was 159.4 MB in the beginning and 475.0 MB in the end (delta: 315.6 MB). Free memory was 107.6 MB in the beginning and 439.0 MB in the end (delta: -331.4 MB). Peak memory consumption was 249.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] struct dummy ad1[20], *ad2; [L18] int i, j, *pa; [L19] j=0 [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND FALSE !(j<20) [L23] i = __VERIFIER_nondet_int() [L24] COND TRUE i >= 0 && i < 10 [L25] ad2 = ad1 [L26] ad1[i].a = i [L27] pa = &ad1[i].a [L28] EXPR ad2[i].a [L28] i = ad2[i].a + 10 [L29] EXPR \read(*pa) [L29] COND FALSE !(i < *pa) [L32] CALL, EXPR check(ad1, i) [L12] EXPR ad1[b].a [L12] return ad1[b].a == b; [L32] RET, EXPR check(ad1, i) [L32] COND TRUE !check(ad1, i) [L39] CALL reach_error() [L3] __assert_fail("0", "test24-2.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 25.1s, OverallIterations: 21, TraceHistogramMax: 20, AutomataDifference: 2.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 366 SDtfs, 270 SDslu, 2428 SDs, 0 SdLazy, 1613 SolverSat, 85 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 330 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 3.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=60occurred in iteration=20, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 20 MinimizatonAttempts, 19 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 21.0s InterpolantComputationTime, 818 NumberOfCodeBlocks, 818 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 739 ConstructedInterpolants, 0 QuantifiedInterpolants, 87093 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 20 InterpolantComputations, 1 PerfectInterpolantSequences, 0/2470 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...