/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=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-examples/standard_init7_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 14:26:31,938 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 14:26:31,944 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 14:26:32,003 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 14:26:32,004 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 14:26:32,011 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 14:26:32,013 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 14:26:32,019 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 14:26:32,022 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 14:26:32,029 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 14:26:32,030 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 14:26:32,032 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 14:26:32,032 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 14:26:32,035 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 14:26:32,039 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 14:26:32,041 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 14:26:32,042 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 14:26:32,054 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 14:26:32,061 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 14:26:32,069 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 14:26:32,071 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 14:26:32,073 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 14:26:32,075 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 14:26:32,078 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 14:26:32,087 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 14:26:32,087 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 14:26:32,088 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 14:26:32,090 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 14:26:32,090 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 14:26:32,091 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 14:26:32,092 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 14:26:32,093 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 14:26:32,095 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 14:26:32,095 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 14:26:32,096 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 14:26:32,097 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 14:26:32,097 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 14:26:32,097 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 14:26:32,098 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 14:26:32,099 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 14:26:32,099 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 14:26:32,107 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 [2020-10-27 14:26:32,153 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 14:26:32,154 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 14:26:32,158 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 14:26:32,158 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 14:26:32,158 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 14:26:32,158 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 14:26:32,158 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 14:26:32,159 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 14:26:32,159 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 14:26:32,159 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 14:26:32,160 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 14:26:32,160 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 14:26:32,161 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 14:26:32,161 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 14:26:32,161 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 14:26:32,161 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 14:26:32,161 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 14:26:32,161 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 14:26:32,162 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 14:26:32,162 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 14:26:32,162 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 14:26:32,162 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:26:32,162 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 14:26:32,163 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 14:26:32,163 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 14:26:32,163 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 14:26:32,163 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 14:26:32,163 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 14:26:32,164 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 14:26:32,164 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 14:26:32,532 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 14:26:32,558 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 14:26:32,562 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 14:26:32,563 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 14:26:32,564 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 14:26:32,565 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init7_ground-1.i [2020-10-27 14:26:32,653 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/726b8b14b/4b2b0ded6c2d4f6f871caf0272b713ca/FLAG2e0df42e8 [2020-10-27 14:26:33,369 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 14:26:33,370 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_init7_ground-1.i [2020-10-27 14:26:33,379 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/726b8b14b/4b2b0ded6c2d4f6f871caf0272b713ca/FLAG2e0df42e8 [2020-10-27 14:26:33,696 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/726b8b14b/4b2b0ded6c2d4f6f871caf0272b713ca [2020-10-27 14:26:33,700 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 14:26:33,710 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 14:26:33,712 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 14:26:33,713 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 14:26:33,719 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 14:26:33,721 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:26:33" (1/1) ... [2020-10-27 14:26:33,725 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25317aaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:26:33, skipping insertion in model container [2020-10-27 14:26:33,726 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:26:33" (1/1) ... [2020-10-27 14:26:33,734 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 14:26:33,755 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 14:26:33,931 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:26:33,941 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 14:26:33,973 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:26:34,000 INFO L208 MainTranslator]: Completed translation [2020-10-27 14:26:34,002 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:26:34 WrapperNode [2020-10-27 14:26:34,002 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 14:26:34,004 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 14:26:34,004 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 14:26:34,004 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 14:26:34,018 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:26:34" (1/1) ... [2020-10-27 14:26:34,020 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:26:34" (1/1) ... [2020-10-27 14:26:34,041 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:26:34" (1/1) ... [2020-10-27 14:26:34,042 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:26:34" (1/1) ... [2020-10-27 14:26:34,076 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:26:34" (1/1) ... [2020-10-27 14:26:34,089 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:26:34" (1/1) ... [2020-10-27 14:26:34,093 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:26:34" (1/1) ... [2020-10-27 14:26:34,099 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 14:26:34,103 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 14:26:34,104 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 14:26:34,104 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 14:26:34,105 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:26:34" (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 [2020-10-27 14:26:34,202 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 14:26:34,202 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 14:26:34,202 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 14:26:34,203 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 14:26:34,203 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 14:26:34,203 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 14:26:34,203 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 14:26:34,203 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 14:26:34,204 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 14:26:34,204 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 14:26:34,204 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 14:26:34,204 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 14:26:34,204 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 14:26:34,205 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 14:26:34,205 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 14:26:34,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 14:26:34,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 14:26:34,205 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 14:26:34,206 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 14:26:34,685 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 14:26:34,686 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-27 14:26:34,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:26:34 BoogieIcfgContainer [2020-10-27 14:26:34,688 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 14:26:34,690 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 14:26:34,690 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 14:26:34,694 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 14:26:34,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 02:26:33" (1/3) ... [2020-10-27 14:26:34,695 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c77f430 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:26:34, skipping insertion in model container [2020-10-27 14:26:34,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:26:34" (2/3) ... [2020-10-27 14:26:34,696 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c77f430 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:26:34, skipping insertion in model container [2020-10-27 14:26:34,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:26:34" (3/3) ... [2020-10-27 14:26:34,698 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_init7_ground-1.i [2020-10-27 14:26:34,741 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 14:26:34,747 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 14:26:34,763 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 14:26:34,794 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 14:26:34,795 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 14:26:34,795 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 14:26:34,795 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 14:26:34,795 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 14:26:34,795 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 14:26:34,796 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 14:26:34,796 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 14:26:34,817 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-10-27 14:26:34,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 14:26:34,825 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:26:34,826 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:26:34,826 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:26:34,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:26:34,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1254713614, now seen corresponding path program 1 times [2020-10-27 14:26:34,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:26:34,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [350344820] [2020-10-27 14:26:34,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:26:34,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:35,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:35,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:35,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:35,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:35,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:35,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:35,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:36,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:26:36,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 14:26:36,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 14:26:36,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1654 [2020-10-27 14:26:36,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:26:36,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:26:36,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-27 14:26:36,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:26:36,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 14:26:36,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:26:36,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:36,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:36,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:26:36,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:26:36,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:26:36,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 14:26:36,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:26:36,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:26:36,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:26:36,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:26:36,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:26:36,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:26:36,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [350344820] [2020-10-27 14:26:36,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:26:36,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 14:26:36,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044632536] [2020-10-27 14:26:36,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 14:26:36,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:26:36,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 14:26:36,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 14:26:36,855 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 3 states. [2020-10-27 14:26:37,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:26:37,088 INFO L93 Difference]: Finished difference Result 70 states and 104 transitions. [2020-10-27 14:26:37,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 14:26:37,093 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-10-27 14:26:37,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:26:37,102 INFO L225 Difference]: With dead ends: 70 [2020-10-27 14:26:37,104 INFO L226 Difference]: Without dead ends: 32 [2020-10-27 14:26:37,111 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 14:26:37,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-27 14:26:37,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-27 14:26:37,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-27 14:26:37,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-10-27 14:26:37,171 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 27 [2020-10-27 14:26:37,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:26:37,172 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-10-27 14:26:37,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 14:26:37,172 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-10-27 14:26:37,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 14:26:37,174 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:26:37,174 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:26:37,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 14:26:37,174 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:26:37,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:26:37,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1022482938, now seen corresponding path program 1 times [2020-10-27 14:26:37,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:26:37,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [333669436] [2020-10-27 14:26:37,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:26:37,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:37,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:37,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:37,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:37,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:37,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:37,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:37,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:39,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:26:39,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 14:26:39,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 14:26:39,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2549 [2020-10-27 14:26:39,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:26:39,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:26:39,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 14:26:39,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 14:26:39,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:26:39,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:26:39,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:39,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:39,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:26:39,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:26:39,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:26:39,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:26:39,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:26:39,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:26:39,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:26:39,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:26:39,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:26:39,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:26:39,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [333669436] [2020-10-27 14:26:39,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:26:39,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 14:26:39,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947212929] [2020-10-27 14:26:39,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 14:26:39,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:26:39,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 14:26:39,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:26:39,841 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 4 states. [2020-10-27 14:26:40,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:26:40,086 INFO L93 Difference]: Finished difference Result 64 states and 84 transitions. [2020-10-27 14:26:40,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 14:26:40,087 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-27 14:26:40,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:26:40,089 INFO L225 Difference]: With dead ends: 64 [2020-10-27 14:26:40,089 INFO L226 Difference]: Without dead ends: 39 [2020-10-27 14:26:40,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:26:40,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-27 14:26:40,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-27 14:26:40,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-27 14:26:40,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2020-10-27 14:26:40,101 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 27 [2020-10-27 14:26:40,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:26:40,101 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2020-10-27 14:26:40,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 14:26:40,102 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2020-10-27 14:26:40,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 14:26:40,103 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:26:40,103 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:26:40,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 14:26:40,104 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:26:40,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:26:40,104 INFO L82 PathProgramCache]: Analyzing trace with hash 2123827569, now seen corresponding path program 1 times [2020-10-27 14:26:40,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:26:40,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [711054762] [2020-10-27 14:26:40,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:26:40,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:40,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:40,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:40,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:40,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:40,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:40,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:40,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:45,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:26:45,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 14:26:45,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 14:26:45,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-27 14:26:45,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:26:45,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 14:26:45,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-27 14:26:45,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 14:26:45,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:26:45,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:26:45,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:45,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:45,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:26:45,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:26:45,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:26:45,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:26:45,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:26:45,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:26:45,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:26:45,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:26:45,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:26:45,239 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-27 14:26:45,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [711054762] [2020-10-27 14:26:45,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:26:45,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 14:26:45,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282080494] [2020-10-27 14:26:45,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 14:26:45,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:26:45,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 14:26:45,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:26:45,247 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand 5 states. [2020-10-27 14:26:45,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:26:45,598 INFO L93 Difference]: Finished difference Result 77 states and 97 transitions. [2020-10-27 14:26:45,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 14:26:45,600 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-10-27 14:26:45,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:26:45,601 INFO L225 Difference]: With dead ends: 77 [2020-10-27 14:26:45,601 INFO L226 Difference]: Without dead ends: 46 [2020-10-27 14:26:45,602 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:26:45,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-27 14:26:45,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-27 14:26:45,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-27 14:26:45,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2020-10-27 14:26:45,626 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 34 [2020-10-27 14:26:45,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:26:45,627 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2020-10-27 14:26:45,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 14:26:45,627 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2020-10-27 14:26:45,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 14:26:45,631 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:26:45,631 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:26:45,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 14:26:45,632 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:26:45,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:26:45,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1509369946, now seen corresponding path program 2 times [2020-10-27 14:26:45,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:26:45,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [310185961] [2020-10-27 14:26:45,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:26:45,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:45,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:45,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:45,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:45,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:45,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:45,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:48,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:50,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:26:50,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 14:26:50,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 14:26:50,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 14:26:50,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:26:50,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 14:26:50,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-27 14:26:50,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 14:26:50,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 14:26:50,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:26:50,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:50,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:50,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:26:50,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:26:50,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:26:50,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 14:26:50,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:26:50,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:26:50,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:26:50,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:26:50,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:26:50,838 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-27 14:26:50,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [310185961] [2020-10-27 14:26:50,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:26:50,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 14:26:50,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082259619] [2020-10-27 14:26:50,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 14:26:50,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:26:50,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 14:26:50,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:26:50,844 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand 6 states. [2020-10-27 14:26:51,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:26:51,141 INFO L93 Difference]: Finished difference Result 90 states and 110 transitions. [2020-10-27 14:26:51,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 14:26:51,142 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2020-10-27 14:26:51,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:26:51,143 INFO L225 Difference]: With dead ends: 90 [2020-10-27 14:26:51,143 INFO L226 Difference]: Without dead ends: 53 [2020-10-27 14:26:51,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:26:51,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-27 14:26:51,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-27 14:26:51,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-27 14:26:51,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2020-10-27 14:26:51,154 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 41 [2020-10-27 14:26:51,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:26:51,154 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2020-10-27 14:26:51,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 14:26:51,154 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2020-10-27 14:26:51,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 14:26:51,155 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:26:51,156 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:26:51,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 14:26:51,156 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:26:51,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:26:51,157 INFO L82 PathProgramCache]: Analyzing trace with hash 2004918481, now seen corresponding path program 3 times [2020-10-27 14:26:51,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:26:51,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1034389495] [2020-10-27 14:26:51,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:26:51,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:51,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:51,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:51,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:51,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:51,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:51,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:56,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:26:56,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 14:26:56,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:26:56,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 14:26:56,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:26:56,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 14:26:56,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-27 14:26:56,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 14:26:56,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:26:56,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:26:56,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:56,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:56,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:26:56,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:26:56,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:26:56,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 14:26:56,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:26:56,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:26:56,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:26:56,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:26:56,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 14:26:56,354 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-27 14:26:56,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1034389495] [2020-10-27 14:26:56,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:26:56,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 14:26:56,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389975514] [2020-10-27 14:26:56,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 14:26:56,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:26:56,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 14:26:56,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:26:56,369 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand 7 states. [2020-10-27 14:26:56,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:26:56,699 INFO L93 Difference]: Finished difference Result 103 states and 123 transitions. [2020-10-27 14:26:56,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 14:26:56,700 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 48 [2020-10-27 14:26:56,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:26:56,701 INFO L225 Difference]: With dead ends: 103 [2020-10-27 14:26:56,701 INFO L226 Difference]: Without dead ends: 60 [2020-10-27 14:26:56,702 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:26:56,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-27 14:26:56,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-10-27 14:26:56,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-27 14:26:56,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2020-10-27 14:26:56,711 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 48 [2020-10-27 14:26:56,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:26:56,712 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2020-10-27 14:26:56,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 14:26:56,712 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2020-10-27 14:26:56,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 14:26:56,713 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:26:56,713 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:26:56,714 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 14:26:56,714 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:26:56,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:26:56,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1774816954, now seen corresponding path program 4 times [2020-10-27 14:26:56,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:26:56,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [105297953] [2020-10-27 14:26:56,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:26:56,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:56,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:56,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:56,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:56,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:56,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:57,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:01,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:01,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 14:27:01,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:27:01,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 14:27:01,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:01,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 14:27:01,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-27 14:27:01,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:27:01,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:01,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:27:01,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:01,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:01,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:01,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:27:01,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:01,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:27:01,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:01,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:01,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:01,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:01,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:01,918 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-10-27 14:27:01,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [105297953] [2020-10-27 14:27:01,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:27:01,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 14:27:01,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866578578] [2020-10-27 14:27:01,922 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 14:27:01,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:27:01,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 14:27:01,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:27:01,924 INFO L87 Difference]: Start difference. First operand 60 states and 67 transitions. Second operand 8 states. [2020-10-27 14:27:02,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:27:02,289 INFO L93 Difference]: Finished difference Result 116 states and 136 transitions. [2020-10-27 14:27:02,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 14:27:02,290 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 55 [2020-10-27 14:27:02,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:27:02,292 INFO L225 Difference]: With dead ends: 116 [2020-10-27 14:27:02,292 INFO L226 Difference]: Without dead ends: 67 [2020-10-27 14:27:02,293 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:27:02,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-27 14:27:02,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-27 14:27:02,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-27 14:27:02,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2020-10-27 14:27:02,310 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 55 [2020-10-27 14:27:02,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:27:02,311 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2020-10-27 14:27:02,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 14:27:02,311 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2020-10-27 14:27:02,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-27 14:27:02,315 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:02,315 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:27:02,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 14:27:02,315 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:02,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:02,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1332096975, now seen corresponding path program 5 times [2020-10-27 14:27:02,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:02,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [496881494] [2020-10-27 14:27:02,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:02,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:02,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:02,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:02,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:02,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:02,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:03,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:07,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:07,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 14:27:07,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:27:07,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 14:27:07,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:07,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 14:27:07,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-27 14:27:07,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 14:27:07,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:07,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:27:07,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:07,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:07,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:07,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:27:07,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:07,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:27:07,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:07,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:07,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:07,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:07,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:07,545 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-10-27 14:27:07,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [496881494] [2020-10-27 14:27:07,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:27:07,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 14:27:07,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442874175] [2020-10-27 14:27:07,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 14:27:07,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:27:07,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 14:27:07,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:27:07,548 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand 9 states. [2020-10-27 14:27:08,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:27:08,073 INFO L93 Difference]: Finished difference Result 129 states and 149 transitions. [2020-10-27 14:27:08,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 14:27:08,077 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 62 [2020-10-27 14:27:08,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:27:08,079 INFO L225 Difference]: With dead ends: 129 [2020-10-27 14:27:08,079 INFO L226 Difference]: Without dead ends: 74 [2020-10-27 14:27:08,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:27:08,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-27 14:27:08,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-10-27 14:27:08,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-27 14:27:08,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 81 transitions. [2020-10-27 14:27:08,089 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 81 transitions. Word has length 62 [2020-10-27 14:27:08,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:27:08,089 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 81 transitions. [2020-10-27 14:27:08,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 14:27:08,090 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 81 transitions. [2020-10-27 14:27:08,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 14:27:08,091 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:08,091 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:27:08,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 14:27:08,091 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:08,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:08,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1930890522, now seen corresponding path program 6 times [2020-10-27 14:27:08,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:08,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [148252069] [2020-10-27 14:27:08,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:08,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:08,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:08,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:08,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:08,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:08,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:08,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:13,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:13,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 14:27:13,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:27:13,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 14:27:13,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:13,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:27:13,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-27 14:27:13,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 14:27:13,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:13,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:27:13,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:13,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:13,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:13,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:27:13,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:13,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:27:13,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:13,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:13,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:13,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:13,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:13,368 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-10-27 14:27:13,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [148252069] [2020-10-27 14:27:13,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:27:13,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 14:27:13,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347449354] [2020-10-27 14:27:13,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 14:27:13,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:27:13,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 14:27:13,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:27:13,371 INFO L87 Difference]: Start difference. First operand 74 states and 81 transitions. Second operand 10 states. [2020-10-27 14:27:13,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:27:13,923 INFO L93 Difference]: Finished difference Result 142 states and 162 transitions. [2020-10-27 14:27:13,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 14:27:13,924 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-10-27 14:27:13,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:27:13,926 INFO L225 Difference]: With dead ends: 142 [2020-10-27 14:27:13,926 INFO L226 Difference]: Without dead ends: 81 [2020-10-27 14:27:13,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:27:13,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-27 14:27:13,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-10-27 14:27:13,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-27 14:27:13,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 88 transitions. [2020-10-27 14:27:13,937 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 88 transitions. Word has length 69 [2020-10-27 14:27:13,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:27:13,938 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 88 transitions. [2020-10-27 14:27:13,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 14:27:13,938 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 88 transitions. [2020-10-27 14:27:13,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-27 14:27:13,939 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:13,940 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:27:13,940 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 14:27:13,940 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:13,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:13,941 INFO L82 PathProgramCache]: Analyzing trace with hash -154101871, now seen corresponding path program 7 times [2020-10-27 14:27:13,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:13,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [337041530] [2020-10-27 14:27:13,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:13,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:13,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:14,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:14,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:14,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:14,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:15,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:18,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:18,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-27 14:27:18,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:27:18,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 14:27:18,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:18,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 14:27:18,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 56 [2020-10-27 14:27:18,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 14:27:18,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:19,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:27:19,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:19,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:19,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:19,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:27:19,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:19,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:27:19,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:19,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:19,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:19,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:19,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:19,236 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2020-10-27 14:27:19,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [337041530] [2020-10-27 14:27:19,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:27:19,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 14:27:19,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861923834] [2020-10-27 14:27:19,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 14:27:19,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:27:19,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 14:27:19,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:27:19,239 INFO L87 Difference]: Start difference. First operand 81 states and 88 transitions. Second operand 11 states. [2020-10-27 14:27:19,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:27:19,779 INFO L93 Difference]: Finished difference Result 155 states and 175 transitions. [2020-10-27 14:27:19,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 14:27:19,780 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 76 [2020-10-27 14:27:19,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:27:19,781 INFO L225 Difference]: With dead ends: 155 [2020-10-27 14:27:19,781 INFO L226 Difference]: Without dead ends: 88 [2020-10-27 14:27:19,785 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:27:19,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-27 14:27:19,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-10-27 14:27:19,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-27 14:27:19,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 95 transitions. [2020-10-27 14:27:19,804 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 95 transitions. Word has length 76 [2020-10-27 14:27:19,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:27:19,808 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 95 transitions. [2020-10-27 14:27:19,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 14:27:19,808 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 95 transitions. [2020-10-27 14:27:19,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-27 14:27:19,810 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:19,810 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:27:19,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 14:27:19,810 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:19,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:19,811 INFO L82 PathProgramCache]: Analyzing trace with hash -705536890, now seen corresponding path program 8 times [2020-10-27 14:27:19,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:19,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [228259440] [2020-10-27 14:27:19,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:19,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:19,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:19,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:19,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:19,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:20,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:24,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:24,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-27 14:27:24,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:27:24,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 14:27:24,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:24,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:27:24,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-27 14:27:24,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 14:27:24,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:25,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:27:25,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:25,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:25,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:25,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:27:25,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:25,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:27:25,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:25,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:25,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:25,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:25,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:27:25,196 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2020-10-27 14:27:25,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [228259440] [2020-10-27 14:27:25,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:27:25,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:27:25,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747187586] [2020-10-27 14:27:25,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:27:25,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:27:25,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:27:25,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:27:25,202 INFO L87 Difference]: Start difference. First operand 88 states and 95 transitions. Second operand 12 states. [2020-10-27 14:27:25,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:27:25,768 INFO L93 Difference]: Finished difference Result 168 states and 188 transitions. [2020-10-27 14:27:25,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 14:27:25,769 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 83 [2020-10-27 14:27:25,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:27:25,771 INFO L225 Difference]: With dead ends: 168 [2020-10-27 14:27:25,771 INFO L226 Difference]: Without dead ends: 95 [2020-10-27 14:27:25,772 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:27:25,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-27 14:27:25,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2020-10-27 14:27:25,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-27 14:27:25,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 102 transitions. [2020-10-27 14:27:25,788 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 102 transitions. Word has length 83 [2020-10-27 14:27:25,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:27:25,788 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 102 transitions. [2020-10-27 14:27:25,788 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:27:25,788 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 102 transitions. [2020-10-27 14:27:25,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-27 14:27:25,795 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:25,796 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:27:25,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 14:27:25,800 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:25,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:25,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1418917617, now seen corresponding path program 9 times [2020-10-27 14:27:25,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:25,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [980974606] [2020-10-27 14:27:25,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:25,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:25,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:25,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:25,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:26,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:26,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:30,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:30,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-27 14:27:30,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:27:30,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 14:27:30,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:30,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 14:27:30,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-27 14:27:30,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 14:27:30,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:31,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:27:31,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:31,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:31,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:31,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:27:31,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:31,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:27:31,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:31,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:31,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:31,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:31,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:27:31,194 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2020-10-27 14:27:31,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [980974606] [2020-10-27 14:27:31,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:27:31,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 14:27:31,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182145243] [2020-10-27 14:27:31,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 14:27:31,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:27:31,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 14:27:31,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:27:31,199 INFO L87 Difference]: Start difference. First operand 95 states and 102 transitions. Second operand 13 states. [2020-10-27 14:27:31,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:27:31,849 INFO L93 Difference]: Finished difference Result 181 states and 201 transitions. [2020-10-27 14:27:31,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 14:27:31,850 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 90 [2020-10-27 14:27:31,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:27:31,853 INFO L225 Difference]: With dead ends: 181 [2020-10-27 14:27:31,853 INFO L226 Difference]: Without dead ends: 102 [2020-10-27 14:27:31,855 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:27:31,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-27 14:27:31,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2020-10-27 14:27:31,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-27 14:27:31,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 109 transitions. [2020-10-27 14:27:31,870 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 109 transitions. Word has length 90 [2020-10-27 14:27:31,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:27:31,870 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 109 transitions. [2020-10-27 14:27:31,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 14:27:31,870 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 109 transitions. [2020-10-27 14:27:31,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-27 14:27:31,874 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:31,874 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:27:31,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 14:27:31,874 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:31,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:31,876 INFO L82 PathProgramCache]: Analyzing trace with hash 799321638, now seen corresponding path program 10 times [2020-10-27 14:27:31,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:31,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [363882214] [2020-10-27 14:27:31,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:31,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:31,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:32,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:32,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:32,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:32,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:36,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:36,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-27 14:27:36,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:27:36,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 14:27:36,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:36,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:27:36,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-27 14:27:36,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 14:27:36,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:37,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:27:37,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:37,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:37,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:37,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:27:37,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:37,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:27:37,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:37,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:37,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:37,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:37,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:37,253 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-10-27 14:27:37,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [363882214] [2020-10-27 14:27:37,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:27:37,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:27:37,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763222404] [2020-10-27 14:27:37,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:27:37,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:27:37,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:27:37,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:27:37,256 INFO L87 Difference]: Start difference. First operand 102 states and 109 transitions. Second operand 14 states. [2020-10-27 14:27:37,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:27:37,867 INFO L93 Difference]: Finished difference Result 194 states and 214 transitions. [2020-10-27 14:27:37,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 14:27:37,868 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 97 [2020-10-27 14:27:37,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:27:37,869 INFO L225 Difference]: With dead ends: 194 [2020-10-27 14:27:37,869 INFO L226 Difference]: Without dead ends: 109 [2020-10-27 14:27:37,870 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:27:37,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-27 14:27:37,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2020-10-27 14:27:37,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-27 14:27:37,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 116 transitions. [2020-10-27 14:27:37,879 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 116 transitions. Word has length 97 [2020-10-27 14:27:37,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:27:37,880 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 116 transitions. [2020-10-27 14:27:37,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:27:37,880 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 116 transitions. [2020-10-27 14:27:37,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-27 14:27:37,881 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:37,891 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:27:37,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 14:27:37,892 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:37,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:37,892 INFO L82 PathProgramCache]: Analyzing trace with hash -238096815, now seen corresponding path program 11 times [2020-10-27 14:27:37,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:37,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1247236265] [2020-10-27 14:27:37,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:37,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:37,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:38,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:38,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:38,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:38,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:42,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:42,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-27 14:27:42,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:27:42,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 14:27:42,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:42,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 14:27:42,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-27 14:27:42,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 14:27:42,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:43,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:27:43,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:43,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:43,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:43,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:27:43,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:43,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:27:43,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:43,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:43,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:43,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:43,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:43,323 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2020-10-27 14:27:43,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1247236265] [2020-10-27 14:27:43,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:27:43,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 14:27:43,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004715786] [2020-10-27 14:27:43,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 14:27:43,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:27:43,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 14:27:43,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:27:43,326 INFO L87 Difference]: Start difference. First operand 109 states and 116 transitions. Second operand 15 states. [2020-10-27 14:27:44,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:27:44,006 INFO L93 Difference]: Finished difference Result 207 states and 227 transitions. [2020-10-27 14:27:44,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 14:27:44,007 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 104 [2020-10-27 14:27:44,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:27:44,009 INFO L225 Difference]: With dead ends: 207 [2020-10-27 14:27:44,009 INFO L226 Difference]: Without dead ends: 116 [2020-10-27 14:27:44,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:27:44,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-27 14:27:44,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2020-10-27 14:27:44,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-27 14:27:44,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 123 transitions. [2020-10-27 14:27:44,018 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 123 transitions. Word has length 104 [2020-10-27 14:27:44,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:27:44,019 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 123 transitions. [2020-10-27 14:27:44,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 14:27:44,019 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 123 transitions. [2020-10-27 14:27:44,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-27 14:27:44,020 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:44,020 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:27:44,020 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 14:27:44,021 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:44,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:44,021 INFO L82 PathProgramCache]: Analyzing trace with hash -355342394, now seen corresponding path program 12 times [2020-10-27 14:27:44,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:44,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1179129303] [2020-10-27 14:27:44,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:44,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:44,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:44,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:44,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:44,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:44,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:49,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:49,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-27 14:27:49,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:27:49,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 14:27:49,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:49,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 14:27:49,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-27 14:27:49,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 14:27:49,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:49,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:27:49,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:49,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:49,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:49,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:27:49,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:49,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:27:49,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:49,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:49,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:49,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:49,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:49,500 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 468 trivial. 0 not checked. [2020-10-27 14:27:49,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1179129303] [2020-10-27 14:27:49,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:27:49,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:27:49,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116244177] [2020-10-27 14:27:49,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:27:49,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:27:49,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:27:49,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:27:49,503 INFO L87 Difference]: Start difference. First operand 116 states and 123 transitions. Second operand 16 states. [2020-10-27 14:27:50,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:27:50,204 INFO L93 Difference]: Finished difference Result 220 states and 240 transitions. [2020-10-27 14:27:50,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 14:27:50,205 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 111 [2020-10-27 14:27:50,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:27:50,206 INFO L225 Difference]: With dead ends: 220 [2020-10-27 14:27:50,206 INFO L226 Difference]: Without dead ends: 123 [2020-10-27 14:27:50,208 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:27:50,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-27 14:27:50,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2020-10-27 14:27:50,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-27 14:27:50,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 130 transitions. [2020-10-27 14:27:50,216 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 130 transitions. Word has length 111 [2020-10-27 14:27:50,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:27:50,216 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 130 transitions. [2020-10-27 14:27:50,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:27:50,217 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 130 transitions. [2020-10-27 14:27:50,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-27 14:27:50,218 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:50,218 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:27:50,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 14:27:50,219 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:50,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:50,219 INFO L82 PathProgramCache]: Analyzing trace with hash -202211919, now seen corresponding path program 13 times [2020-10-27 14:27:50,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:50,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [334333685] [2020-10-27 14:27:50,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:50,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:50,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:50,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:50,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:50,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:50,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:55,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:55,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-27 14:27:55,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:27:55,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 14:27:55,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:55,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 14:27:55,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-27 14:27:55,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 14:27:55,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:55,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:27:55,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:55,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:55,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:55,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:27:55,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:55,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:27:55,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:55,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:55,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:55,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:55,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:55,763 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 546 trivial. 0 not checked. [2020-10-27 14:27:55,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [334333685] [2020-10-27 14:27:55,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:27:55,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 14:27:55,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245289624] [2020-10-27 14:27:55,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 14:27:55,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:27:55,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 14:27:55,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:27:55,765 INFO L87 Difference]: Start difference. First operand 123 states and 130 transitions. Second operand 17 states. [2020-10-27 14:27:56,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:27:56,513 INFO L93 Difference]: Finished difference Result 233 states and 253 transitions. [2020-10-27 14:27:56,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 14:27:56,514 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 118 [2020-10-27 14:27:56,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:27:56,515 INFO L225 Difference]: With dead ends: 233 [2020-10-27 14:27:56,515 INFO L226 Difference]: Without dead ends: 130 [2020-10-27 14:27:56,517 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:27:56,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-27 14:27:56,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2020-10-27 14:27:56,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-27 14:27:56,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 137 transitions. [2020-10-27 14:27:56,525 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 137 transitions. Word has length 118 [2020-10-27 14:27:56,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:27:56,526 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 137 transitions. [2020-10-27 14:27:56,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 14:27:56,526 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 137 transitions. [2020-10-27 14:27:56,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-27 14:27:56,527 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:56,528 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:27:56,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 14:27:56,528 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:56,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:56,529 INFO L82 PathProgramCache]: Analyzing trace with hash 181143910, now seen corresponding path program 14 times [2020-10-27 14:27:56,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:56,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1728903058] [2020-10-27 14:27:56,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:56,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:56,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:56,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:56,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:56,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:56,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:01,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:01,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-27 14:28:01,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:28:01,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 14:28:01,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:01,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 14:28:01,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-10-27 14:28:01,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 14:28:01,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:02,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:28:02,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:02,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:02,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:02,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:28:02,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:02,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:28:02,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:02,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:02,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:28:02,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:02,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:02,115 INFO L134 CoverageAnalysis]: Checked inductivity of 735 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2020-10-27 14:28:02,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1728903058] [2020-10-27 14:28:02,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:28:02,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 14:28:02,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344459337] [2020-10-27 14:28:02,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 14:28:02,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:28:02,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 14:28:02,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:28:02,119 INFO L87 Difference]: Start difference. First operand 130 states and 137 transitions. Second operand 18 states. [2020-10-27 14:28:02,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:28:02,888 INFO L93 Difference]: Finished difference Result 246 states and 266 transitions. [2020-10-27 14:28:02,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 14:28:02,888 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 125 [2020-10-27 14:28:02,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:28:02,890 INFO L225 Difference]: With dead ends: 246 [2020-10-27 14:28:02,890 INFO L226 Difference]: Without dead ends: 137 [2020-10-27 14:28:02,892 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:28:02,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-27 14:28:02,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2020-10-27 14:28:02,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-27 14:28:02,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 144 transitions. [2020-10-27 14:28:02,903 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 144 transitions. Word has length 125 [2020-10-27 14:28:02,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:28:02,903 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 144 transitions. [2020-10-27 14:28:02,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 14:28:02,903 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 144 transitions. [2020-10-27 14:28:02,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-27 14:28:02,905 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:28:02,905 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:28:02,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 14:28:02,905 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:28:02,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:28:02,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1575724305, now seen corresponding path program 15 times [2020-10-27 14:28:02,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:28:02,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1777337581] [2020-10-27 14:28:02,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:28:02,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:02,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:03,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:03,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:03,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:03,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:07,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:07,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-27 14:28:07,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:28:07,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-27 14:28:07,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:07,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 14:28:07,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-10-27 14:28:07,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 14:28:07,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:08,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:28:08,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:08,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:08,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:08,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:28:08,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:08,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:28:08,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:08,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:08,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:28:08,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:08,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:08,538 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 720 trivial. 0 not checked. [2020-10-27 14:28:08,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1777337581] [2020-10-27 14:28:08,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:28:08,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 14:28:08,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442868080] [2020-10-27 14:28:08,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 14:28:08,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:28:08,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 14:28:08,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:28:08,542 INFO L87 Difference]: Start difference. First operand 137 states and 144 transitions. Second operand 19 states. [2020-10-27 14:28:09,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:28:09,440 INFO L93 Difference]: Finished difference Result 259 states and 279 transitions. [2020-10-27 14:28:09,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 14:28:09,442 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 132 [2020-10-27 14:28:09,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:28:09,444 INFO L225 Difference]: With dead ends: 259 [2020-10-27 14:28:09,444 INFO L226 Difference]: Without dead ends: 144 [2020-10-27 14:28:09,445 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:28:09,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-27 14:28:09,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2020-10-27 14:28:09,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-27 14:28:09,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 151 transitions. [2020-10-27 14:28:09,453 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 151 transitions. Word has length 132 [2020-10-27 14:28:09,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:28:09,454 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 151 transitions. [2020-10-27 14:28:09,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 14:28:09,454 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 151 transitions. [2020-10-27 14:28:09,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-10-27 14:28:09,455 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:28:09,455 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:28:09,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 14:28:09,455 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:28:09,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:28:09,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1701122822, now seen corresponding path program 16 times [2020-10-27 14:28:09,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:28:09,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1282315783] [2020-10-27 14:28:09,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:28:09,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:09,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:09,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:09,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:09,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:10,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:14,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:14,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-27 14:28:14,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:28:14,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-27 14:28:14,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:14,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 14:28:14,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 83 [2020-10-27 14:28:14,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 14:28:14,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:15,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:28:15,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:15,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:15,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:15,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:28:15,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:15,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:28:15,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:15,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:15,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:28:15,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:15,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:15,168 INFO L134 CoverageAnalysis]: Checked inductivity of 952 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 816 trivial. 0 not checked. [2020-10-27 14:28:15,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1282315783] [2020-10-27 14:28:15,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:28:15,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 14:28:15,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185776478] [2020-10-27 14:28:15,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 14:28:15,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:28:15,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 14:28:15,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:28:15,171 INFO L87 Difference]: Start difference. First operand 144 states and 151 transitions. Second operand 20 states. [2020-10-27 14:28:16,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:28:16,059 INFO L93 Difference]: Finished difference Result 272 states and 292 transitions. [2020-10-27 14:28:16,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 14:28:16,060 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 139 [2020-10-27 14:28:16,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:28:16,062 INFO L225 Difference]: With dead ends: 272 [2020-10-27 14:28:16,062 INFO L226 Difference]: Without dead ends: 151 [2020-10-27 14:28:16,064 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:28:16,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-27 14:28:16,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2020-10-27 14:28:16,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-27 14:28:16,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 158 transitions. [2020-10-27 14:28:16,072 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 158 transitions. Word has length 139 [2020-10-27 14:28:16,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:28:16,072 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 158 transitions. [2020-10-27 14:28:16,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 14:28:16,072 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 158 transitions. [2020-10-27 14:28:16,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-27 14:28:16,073 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:28:16,074 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:28:16,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 14:28:16,074 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:28:16,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:28:16,075 INFO L82 PathProgramCache]: Analyzing trace with hash -265788303, now seen corresponding path program 17 times [2020-10-27 14:28:16,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:28:16,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [4879876] [2020-10-27 14:28:16,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:28:16,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:16,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:16,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:16,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:16,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:16,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:21,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:21,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 156 [2020-10-27 14:28:21,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:28:21,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-27 14:28:21,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:21,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 14:28:21,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 87 [2020-10-27 14:28:21,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 14:28:21,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:21,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:28:21,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:21,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:21,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:21,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:28:21,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:21,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:28:21,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:21,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:21,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:28:21,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:21,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:21,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 918 trivial. 0 not checked. [2020-10-27 14:28:21,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [4879876] [2020-10-27 14:28:21,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:28:21,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 14:28:21,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239093421] [2020-10-27 14:28:21,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 14:28:21,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:28:21,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 14:28:21,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:28:21,862 INFO L87 Difference]: Start difference. First operand 151 states and 158 transitions. Second operand 21 states. [2020-10-27 14:28:22,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:28:22,818 INFO L93 Difference]: Finished difference Result 285 states and 305 transitions. [2020-10-27 14:28:22,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 14:28:22,820 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 146 [2020-10-27 14:28:22,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:28:22,821 INFO L225 Difference]: With dead ends: 285 [2020-10-27 14:28:22,821 INFO L226 Difference]: Without dead ends: 158 [2020-10-27 14:28:22,823 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:28:22,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-27 14:28:22,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2020-10-27 14:28:22,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-27 14:28:22,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 165 transitions. [2020-10-27 14:28:22,832 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 165 transitions. Word has length 146 [2020-10-27 14:28:22,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:28:22,832 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 165 transitions. [2020-10-27 14:28:22,833 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 14:28:22,833 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 165 transitions. [2020-10-27 14:28:22,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-27 14:28:22,834 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:28:22,834 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:28:22,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 14:28:22,834 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:28:22,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:28:22,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1024523098, now seen corresponding path program 18 times [2020-10-27 14:28:22,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:28:22,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1332529791] [2020-10-27 14:28:22,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:28:22,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:22,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:22,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:23,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:23,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:23,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:27,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:27,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-10-27 14:28:27,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:28:27,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 14:28:27,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:27,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 14:28:27,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 91 [2020-10-27 14:28:27,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 14:28:27,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:28,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:28:28,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:28,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:28,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:28,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:28:28,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:28,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:28:28,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:28,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:28,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:28:28,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:28,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:28,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1197 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 1026 trivial. 0 not checked. [2020-10-27 14:28:28,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1332529791] [2020-10-27 14:28:28,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:28:28,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 14:28:28,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632030701] [2020-10-27 14:28:28,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 14:28:28,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:28:28,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 14:28:28,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:28:28,650 INFO L87 Difference]: Start difference. First operand 158 states and 165 transitions. Second operand 22 states. [2020-10-27 14:28:29,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:28:29,633 INFO L93 Difference]: Finished difference Result 298 states and 318 transitions. [2020-10-27 14:28:29,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 14:28:29,634 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 153 [2020-10-27 14:28:29,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:28:29,636 INFO L225 Difference]: With dead ends: 298 [2020-10-27 14:28:29,636 INFO L226 Difference]: Without dead ends: 165 [2020-10-27 14:28:29,637 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:28:29,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-27 14:28:29,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2020-10-27 14:28:29,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-27 14:28:29,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 172 transitions. [2020-10-27 14:28:29,646 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 172 transitions. Word has length 153 [2020-10-27 14:28:29,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:28:29,646 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 172 transitions. [2020-10-27 14:28:29,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 14:28:29,646 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 172 transitions. [2020-10-27 14:28:29,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-10-27 14:28:29,647 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:28:29,648 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:28:29,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 14:28:29,648 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:28:29,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:28:29,648 INFO L82 PathProgramCache]: Analyzing trace with hash 144096209, now seen corresponding path program 19 times [2020-10-27 14:28:29,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:28:29,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [199856524] [2020-10-27 14:28:29,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:28:29,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:29,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:29,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:29,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:30,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:30,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:34,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:34,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 170 [2020-10-27 14:28:34,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:28:34,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-27 14:28:34,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:34,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 14:28:34,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 95 [2020-10-27 14:28:34,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 14:28:34,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:35,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:28:35,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:35,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:35,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:35,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:28:35,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:35,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:28:35,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:35,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:35,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:28:35,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:35,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:35,556 INFO L134 CoverageAnalysis]: Checked inductivity of 1330 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 1140 trivial. 0 not checked. [2020-10-27 14:28:35,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [199856524] [2020-10-27 14:28:35,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:28:35,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 14:28:35,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216029320] [2020-10-27 14:28:35,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 14:28:35,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:28:35,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 14:28:35,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:28:35,559 INFO L87 Difference]: Start difference. First operand 165 states and 172 transitions. Second operand 23 states. [2020-10-27 14:28:36,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:28:36,430 INFO L93 Difference]: Finished difference Result 311 states and 331 transitions. [2020-10-27 14:28:36,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 14:28:36,431 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 160 [2020-10-27 14:28:36,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:28:36,433 INFO L225 Difference]: With dead ends: 311 [2020-10-27 14:28:36,433 INFO L226 Difference]: Without dead ends: 172 [2020-10-27 14:28:36,434 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:28:36,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-27 14:28:36,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2020-10-27 14:28:36,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-27 14:28:36,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 179 transitions. [2020-10-27 14:28:36,443 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 179 transitions. Word has length 160 [2020-10-27 14:28:36,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:28:36,443 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 179 transitions. [2020-10-27 14:28:36,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 14:28:36,444 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 179 transitions. [2020-10-27 14:28:36,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-10-27 14:28:36,445 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:28:36,445 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:28:36,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 14:28:36,445 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:28:36,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:28:36,446 INFO L82 PathProgramCache]: Analyzing trace with hash -29630906, now seen corresponding path program 20 times [2020-10-27 14:28:36,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:28:36,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [496396575] [2020-10-27 14:28:36,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:28:36,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:36,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:36,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:36,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:36,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:37,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:41,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:41,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 177 [2020-10-27 14:28:41,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:28:41,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-27 14:28:41,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:41,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 14:28:41,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 99 [2020-10-27 14:28:41,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 14:28:41,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:42,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:28:42,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:42,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:42,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:42,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:28:42,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:42,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:28:42,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:42,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:42,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:28:42,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:42,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:42,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1470 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 1260 trivial. 0 not checked. [2020-10-27 14:28:42,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [496396575] [2020-10-27 14:28:42,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:28:42,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 14:28:42,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325808211] [2020-10-27 14:28:42,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 14:28:42,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:28:42,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 14:28:42,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:28:42,433 INFO L87 Difference]: Start difference. First operand 172 states and 179 transitions. Second operand 24 states. [2020-10-27 14:28:43,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:28:43,459 INFO L93 Difference]: Finished difference Result 324 states and 344 transitions. [2020-10-27 14:28:43,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 14:28:43,462 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 167 [2020-10-27 14:28:43,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:28:43,464 INFO L225 Difference]: With dead ends: 324 [2020-10-27 14:28:43,464 INFO L226 Difference]: Without dead ends: 179 [2020-10-27 14:28:43,465 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:28:43,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-27 14:28:43,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2020-10-27 14:28:43,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-10-27 14:28:43,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 186 transitions. [2020-10-27 14:28:43,474 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 186 transitions. Word has length 167 [2020-10-27 14:28:43,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:28:43,475 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 186 transitions. [2020-10-27 14:28:43,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 14:28:43,475 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 186 transitions. [2020-10-27 14:28:43,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-10-27 14:28:43,476 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:28:43,476 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:28:43,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 14:28:43,477 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:28:43,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:28:43,477 INFO L82 PathProgramCache]: Analyzing trace with hash -2103137487, now seen corresponding path program 21 times [2020-10-27 14:28:43,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:28:43,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1066741107] [2020-10-27 14:28:43,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:28:43,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:43,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:43,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:43,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:43,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:44,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:48,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:48,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 184 [2020-10-27 14:28:48,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:28:48,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-27 14:28:48,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:48,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 14:28:48,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 103 [2020-10-27 14:28:48,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 14:28:48,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:49,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:28:49,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:49,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:49,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:49,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:28:49,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:49,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:28:49,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:49,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:49,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:28:49,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:49,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:49,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 1386 trivial. 0 not checked. [2020-10-27 14:28:49,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1066741107] [2020-10-27 14:28:49,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:28:49,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 14:28:49,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213542276] [2020-10-27 14:28:49,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 14:28:49,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:28:49,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 14:28:49,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:28:49,555 INFO L87 Difference]: Start difference. First operand 179 states and 186 transitions. Second operand 25 states. [2020-10-27 14:28:50,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:28:50,593 INFO L93 Difference]: Finished difference Result 337 states and 357 transitions. [2020-10-27 14:28:50,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 14:28:50,594 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 174 [2020-10-27 14:28:50,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:28:50,595 INFO L225 Difference]: With dead ends: 337 [2020-10-27 14:28:50,595 INFO L226 Difference]: Without dead ends: 186 [2020-10-27 14:28:50,596 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:28:50,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-27 14:28:50,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2020-10-27 14:28:50,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-10-27 14:28:50,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 193 transitions. [2020-10-27 14:28:50,605 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 193 transitions. Word has length 174 [2020-10-27 14:28:50,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:28:50,606 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 193 transitions. [2020-10-27 14:28:50,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 14:28:50,606 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 193 transitions. [2020-10-27 14:28:50,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-10-27 14:28:50,607 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:28:50,607 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:28:50,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 14:28:50,608 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:28:50,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:28:50,608 INFO L82 PathProgramCache]: Analyzing trace with hash 614309862, now seen corresponding path program 22 times [2020-10-27 14:28:50,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:28:50,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1471223588] [2020-10-27 14:28:50,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:28:50,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:50,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:50,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:50,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:51,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:51,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:55,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:55,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 191 [2020-10-27 14:28:55,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:28:55,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-27 14:28:55,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:55,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 14:28:55,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 107 [2020-10-27 14:28:55,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 14:28:55,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:56,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:28:56,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:56,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:56,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:56,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:28:56,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:56,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:28:56,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:56,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:56,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:28:56,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:56,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:56,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1518 trivial. 0 not checked. [2020-10-27 14:28:56,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1471223588] [2020-10-27 14:28:56,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:28:56,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 14:28:56,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455493115] [2020-10-27 14:28:56,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 14:28:56,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:28:56,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 14:28:56,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 14:28:56,736 INFO L87 Difference]: Start difference. First operand 186 states and 193 transitions. Second operand 26 states. [2020-10-27 14:28:57,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:28:57,871 INFO L93 Difference]: Finished difference Result 350 states and 370 transitions. [2020-10-27 14:28:57,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 14:28:57,872 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 181 [2020-10-27 14:28:57,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:28:57,874 INFO L225 Difference]: With dead ends: 350 [2020-10-27 14:28:57,874 INFO L226 Difference]: Without dead ends: 193 [2020-10-27 14:28:57,875 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 14:28:57,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-27 14:28:57,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2020-10-27 14:28:57,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-10-27 14:28:57,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 200 transitions. [2020-10-27 14:28:57,883 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 200 transitions. Word has length 181 [2020-10-27 14:28:57,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:28:57,884 INFO L481 AbstractCegarLoop]: Abstraction has 193 states and 200 transitions. [2020-10-27 14:28:57,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 14:28:57,884 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 200 transitions. [2020-10-27 14:28:57,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2020-10-27 14:28:57,885 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:28:57,885 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:28:57,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 14:28:57,886 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:28:57,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:28:57,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1757400431, now seen corresponding path program 23 times [2020-10-27 14:28:57,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:28:57,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [458446305] [2020-10-27 14:28:57,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:28:57,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:57,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:58,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:58,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:58,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:59,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:02,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:02,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 198 [2020-10-27 14:29:02,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:29:02,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 14:29:02,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:02,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 14:29:02,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-27 14:29:02,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 14:29:02,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:04,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:29:04,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:04,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:04,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:04,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:29:04,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:04,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:29:04,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:04,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:04,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:29:04,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:04,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:04,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1932 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 1656 trivial. 0 not checked. [2020-10-27 14:29:04,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [458446305] [2020-10-27 14:29:04,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:29:04,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 14:29:04,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106081740] [2020-10-27 14:29:04,101 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 14:29:04,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:29:04,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 14:29:04,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 14:29:04,102 INFO L87 Difference]: Start difference. First operand 193 states and 200 transitions. Second operand 27 states. [2020-10-27 14:29:05,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:29:05,351 INFO L93 Difference]: Finished difference Result 363 states and 383 transitions. [2020-10-27 14:29:05,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 14:29:05,352 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 188 [2020-10-27 14:29:05,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:29:05,354 INFO L225 Difference]: With dead ends: 363 [2020-10-27 14:29:05,354 INFO L226 Difference]: Without dead ends: 200 [2020-10-27 14:29:05,355 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 14:29:05,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-27 14:29:05,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2020-10-27 14:29:05,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-10-27 14:29:05,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 207 transitions. [2020-10-27 14:29:05,365 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 207 transitions. Word has length 188 [2020-10-27 14:29:05,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:29:05,365 INFO L481 AbstractCegarLoop]: Abstraction has 200 states and 207 transitions. [2020-10-27 14:29:05,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 14:29:05,365 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 207 transitions. [2020-10-27 14:29:05,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-10-27 14:29:05,366 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:29:05,367 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:29:05,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 14:29:05,367 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:29:05,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:29:05,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1780070010, now seen corresponding path program 24 times [2020-10-27 14:29:05,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:29:05,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [892435455] [2020-10-27 14:29:05,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:29:05,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:05,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:05,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:05,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:05,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:07,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:10,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:10,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 205 [2020-10-27 14:29:10,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:29:10,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-27 14:29:10,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:10,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 14:29:10,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 115 [2020-10-27 14:29:10,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 14:29:10,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:11,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:29:11,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:11,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:11,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:11,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:29:11,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:11,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:29:11,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:11,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:11,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:29:11,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:11,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:11,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2100 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 1800 trivial. 0 not checked. [2020-10-27 14:29:11,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [892435455] [2020-10-27 14:29:11,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:29:11,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 14:29:11,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222562233] [2020-10-27 14:29:11,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 14:29:11,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:29:11,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 14:29:11,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 14:29:11,670 INFO L87 Difference]: Start difference. First operand 200 states and 207 transitions. Second operand 28 states. [2020-10-27 14:29:12,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:29:12,820 INFO L93 Difference]: Finished difference Result 376 states and 396 transitions. [2020-10-27 14:29:12,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 14:29:12,821 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 195 [2020-10-27 14:29:12,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:29:12,822 INFO L225 Difference]: With dead ends: 376 [2020-10-27 14:29:12,822 INFO L226 Difference]: Without dead ends: 207 [2020-10-27 14:29:12,823 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 14:29:12,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-27 14:29:12,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2020-10-27 14:29:12,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-10-27 14:29:12,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 214 transitions. [2020-10-27 14:29:12,834 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 214 transitions. Word has length 195 [2020-10-27 14:29:12,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:29:12,834 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 214 transitions. [2020-10-27 14:29:12,834 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 14:29:12,834 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 214 transitions. [2020-10-27 14:29:12,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2020-10-27 14:29:12,836 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:29:12,836 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:29:12,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 14:29:12,836 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:29:12,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:29:12,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1126739471, now seen corresponding path program 25 times [2020-10-27 14:29:12,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:29:12,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1504244511] [2020-10-27 14:29:12,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:29:12,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:12,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:13,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:13,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:13,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:14,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:17,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:17,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 212 [2020-10-27 14:29:17,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:29:17,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-27 14:29:17,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:17,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 14:29:17,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 119 [2020-10-27 14:29:17,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 14:29:17,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:19,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:29:19,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:19,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:19,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:19,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:29:19,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:19,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:29:19,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:19,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:19,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:29:19,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:19,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:19,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2275 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 1950 trivial. 0 not checked. [2020-10-27 14:29:19,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1504244511] [2020-10-27 14:29:19,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:29:19,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 14:29:19,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584025491] [2020-10-27 14:29:19,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 14:29:19,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:29:19,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 14:29:19,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:29:19,177 INFO L87 Difference]: Start difference. First operand 207 states and 214 transitions. Second operand 29 states. [2020-10-27 14:29:20,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:29:20,456 INFO L93 Difference]: Finished difference Result 389 states and 409 transitions. [2020-10-27 14:29:20,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 14:29:20,457 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 202 [2020-10-27 14:29:20,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:29:20,459 INFO L225 Difference]: With dead ends: 389 [2020-10-27 14:29:20,459 INFO L226 Difference]: Without dead ends: 214 [2020-10-27 14:29:20,461 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:29:20,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-10-27 14:29:20,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2020-10-27 14:29:20,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-10-27 14:29:20,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 221 transitions. [2020-10-27 14:29:20,470 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 221 transitions. Word has length 202 [2020-10-27 14:29:20,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:29:20,470 INFO L481 AbstractCegarLoop]: Abstraction has 214 states and 221 transitions. [2020-10-27 14:29:20,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 14:29:20,471 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 221 transitions. [2020-10-27 14:29:20,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2020-10-27 14:29:20,472 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:29:20,472 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:29:20,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 14:29:20,472 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:29:20,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:29:20,473 INFO L82 PathProgramCache]: Analyzing trace with hash 610786086, now seen corresponding path program 26 times [2020-10-27 14:29:20,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:29:20,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [201666164] [2020-10-27 14:29:20,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:29:20,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:20,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:20,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:20,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:21,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:22,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:25,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:25,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 219 [2020-10-27 14:29:25,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:29:25,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-27 14:29:25,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:25,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 14:29:25,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 123 [2020-10-27 14:29:25,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 14:29:25,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:27,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:29:27,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:27,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:27,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:27,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:29:27,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:27,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:29:27,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:27,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:27,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:29:27,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:27,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:27,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2457 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 2106 trivial. 0 not checked. [2020-10-27 14:29:27,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [201666164] [2020-10-27 14:29:27,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:29:27,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 14:29:27,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110186461] [2020-10-27 14:29:27,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 14:29:27,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:29:27,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 14:29:27,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-27 14:29:27,050 INFO L87 Difference]: Start difference. First operand 214 states and 221 transitions. Second operand 30 states. [2020-10-27 14:29:28,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:29:28,368 INFO L93 Difference]: Finished difference Result 402 states and 422 transitions. [2020-10-27 14:29:28,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 14:29:28,369 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 209 [2020-10-27 14:29:28,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:29:28,371 INFO L225 Difference]: With dead ends: 402 [2020-10-27 14:29:28,371 INFO L226 Difference]: Without dead ends: 221 [2020-10-27 14:29:28,373 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-27 14:29:28,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-27 14:29:28,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2020-10-27 14:29:28,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-10-27 14:29:28,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 228 transitions. [2020-10-27 14:29:28,383 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 228 transitions. Word has length 209 [2020-10-27 14:29:28,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:29:28,383 INFO L481 AbstractCegarLoop]: Abstraction has 221 states and 228 transitions. [2020-10-27 14:29:28,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 14:29:28,383 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 228 transitions. [2020-10-27 14:29:28,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-10-27 14:29:28,385 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:29:28,385 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:29:28,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 14:29:28,385 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:29:28,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:29:28,386 INFO L82 PathProgramCache]: Analyzing trace with hash -2024273583, now seen corresponding path program 27 times [2020-10-27 14:29:28,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:29:28,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [917342649] [2020-10-27 14:29:28,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:29:28,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:28,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:28,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:28,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:28,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:30,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:33,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:33,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 226 [2020-10-27 14:29:33,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:29:33,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-27 14:29:33,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:33,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 14:29:33,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 127 [2020-10-27 14:29:33,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 14:29:33,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:34,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:29:34,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:34,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:34,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:34,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:29:34,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:34,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:29:34,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:34,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:34,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:29:34,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:34,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:34,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2646 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 2268 trivial. 0 not checked. [2020-10-27 14:29:34,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [917342649] [2020-10-27 14:29:34,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:29:34,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 14:29:34,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112039199] [2020-10-27 14:29:34,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 14:29:34,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:29:34,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 14:29:34,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-27 14:29:34,958 INFO L87 Difference]: Start difference. First operand 221 states and 228 transitions. Second operand 31 states. [2020-10-27 14:29:36,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:29:36,279 INFO L93 Difference]: Finished difference Result 415 states and 435 transitions. [2020-10-27 14:29:36,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 14:29:36,281 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 216 [2020-10-27 14:29:36,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:29:36,282 INFO L225 Difference]: With dead ends: 415 [2020-10-27 14:29:36,282 INFO L226 Difference]: Without dead ends: 228 [2020-10-27 14:29:36,284 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-27 14:29:36,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-27 14:29:36,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 228. [2020-10-27 14:29:36,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2020-10-27 14:29:36,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 235 transitions. [2020-10-27 14:29:36,293 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 235 transitions. Word has length 216 [2020-10-27 14:29:36,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:29:36,293 INFO L481 AbstractCegarLoop]: Abstraction has 228 states and 235 transitions. [2020-10-27 14:29:36,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 14:29:36,293 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 235 transitions. [2020-10-27 14:29:36,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2020-10-27 14:29:36,295 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:29:36,295 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:29:36,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 14:29:36,295 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:29:36,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:29:36,296 INFO L82 PathProgramCache]: Analyzing trace with hash 888427718, now seen corresponding path program 28 times [2020-10-27 14:29:36,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:29:36,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1025385141] [2020-10-27 14:29:36,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:29:36,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:36,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:36,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:36,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:36,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:38,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:41,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:41,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 233 [2020-10-27 14:29:41,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:29:41,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5043 [2020-10-27 14:29:41,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:41,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 14:29:41,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 131 [2020-10-27 14:29:41,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 14:29:41,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:42,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:29:42,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:42,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:42,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:42,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:29:42,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:42,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:29:42,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:42,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:42,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:29:42,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:42,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:42,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2842 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 2436 trivial. 0 not checked. [2020-10-27 14:29:42,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1025385141] [2020-10-27 14:29:42,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:29:42,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 14:29:42,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231219554] [2020-10-27 14:29:42,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 14:29:42,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:29:42,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 14:29:42,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 14:29:42,950 INFO L87 Difference]: Start difference. First operand 228 states and 235 transitions. Second operand 32 states. [2020-10-27 14:29:44,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:29:44,324 INFO L93 Difference]: Finished difference Result 428 states and 448 transitions. [2020-10-27 14:29:44,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 14:29:44,325 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 223 [2020-10-27 14:29:44,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:29:44,327 INFO L225 Difference]: With dead ends: 428 [2020-10-27 14:29:44,327 INFO L226 Difference]: Without dead ends: 235 [2020-10-27 14:29:44,329 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 14:29:44,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-10-27 14:29:44,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2020-10-27 14:29:44,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2020-10-27 14:29:44,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 242 transitions. [2020-10-27 14:29:44,338 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 242 transitions. Word has length 223 [2020-10-27 14:29:44,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:29:44,339 INFO L481 AbstractCegarLoop]: Abstraction has 235 states and 242 transitions. [2020-10-27 14:29:44,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 14:29:44,339 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 242 transitions. [2020-10-27 14:29:44,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2020-10-27 14:29:44,340 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:29:44,340 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:29:44,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 14:29:44,341 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:29:44,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:29:44,341 INFO L82 PathProgramCache]: Analyzing trace with hash -2010097487, now seen corresponding path program 29 times [2020-10-27 14:29:44,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:29:44,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1215698611] [2020-10-27 14:29:44,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:29:44,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:44,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:44,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:44,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:44,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:46,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:49,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:49,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 240 [2020-10-27 14:29:49,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:29:49,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-27 14:29:49,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:49,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 14:29:49,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 135 [2020-10-27 14:29:49,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 14:29:49,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:50,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:29:50,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:50,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:51,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:51,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:29:51,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:51,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:29:51,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:51,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:51,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:29:51,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:51,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:51,026 INFO L134 CoverageAnalysis]: Checked inductivity of 3045 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 2610 trivial. 0 not checked. [2020-10-27 14:29:51,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1215698611] [2020-10-27 14:29:51,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:29:51,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 14:29:51,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679159495] [2020-10-27 14:29:51,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 14:29:51,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:29:51,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 14:29:51,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 14:29:51,028 INFO L87 Difference]: Start difference. First operand 235 states and 242 transitions. Second operand 33 states. [2020-10-27 14:29:52,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:29:52,356 INFO L93 Difference]: Finished difference Result 441 states and 461 transitions. [2020-10-27 14:29:52,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 14:29:52,357 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 230 [2020-10-27 14:29:52,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:29:52,359 INFO L225 Difference]: With dead ends: 441 [2020-10-27 14:29:52,359 INFO L226 Difference]: Without dead ends: 242 [2020-10-27 14:29:52,360 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 14:29:52,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-10-27 14:29:52,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 242. [2020-10-27 14:29:52,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-10-27 14:29:52,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 249 transitions. [2020-10-27 14:29:52,370 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 249 transitions. Word has length 230 [2020-10-27 14:29:52,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:29:52,370 INFO L481 AbstractCegarLoop]: Abstraction has 242 states and 249 transitions. [2020-10-27 14:29:52,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 14:29:52,370 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 249 transitions. [2020-10-27 14:29:52,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-10-27 14:29:52,371 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:29:52,372 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:29:52,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 14:29:52,372 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:29:52,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:29:52,373 INFO L82 PathProgramCache]: Analyzing trace with hash -555895194, now seen corresponding path program 30 times [2020-10-27 14:29:52,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:29:52,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [710593913] [2020-10-27 14:29:52,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:29:52,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:52,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:52,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:52,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:53,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:54,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:57,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:57,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 247 [2020-10-27 14:29:57,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:29:57,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-27 14:29:57,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:57,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 14:29:57,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 139 [2020-10-27 14:29:57,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 14:29:57,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:59,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:29:59,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:59,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:59,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:59,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:29:59,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:59,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:29:59,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:59,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:59,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:29:59,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:59,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:59,203 INFO L134 CoverageAnalysis]: Checked inductivity of 3255 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 2790 trivial. 0 not checked. [2020-10-27 14:29:59,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [710593913] [2020-10-27 14:29:59,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:29:59,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-27 14:29:59,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509725368] [2020-10-27 14:29:59,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-27 14:29:59,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:29:59,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-27 14:29:59,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 14:29:59,205 INFO L87 Difference]: Start difference. First operand 242 states and 249 transitions. Second operand 34 states. [2020-10-27 14:30:00,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:30:00,786 INFO L93 Difference]: Finished difference Result 454 states and 474 transitions. [2020-10-27 14:30:00,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 14:30:00,788 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 237 [2020-10-27 14:30:00,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:30:00,790 INFO L225 Difference]: With dead ends: 454 [2020-10-27 14:30:00,790 INFO L226 Difference]: Without dead ends: 249 [2020-10-27 14:30:00,791 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 14:30:00,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-10-27 14:30:00,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 249. [2020-10-27 14:30:00,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-10-27 14:30:00,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 256 transitions. [2020-10-27 14:30:00,799 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 256 transitions. Word has length 237 [2020-10-27 14:30:00,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:30:00,799 INFO L481 AbstractCegarLoop]: Abstraction has 249 states and 256 transitions. [2020-10-27 14:30:00,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-27 14:30:00,800 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 256 transitions. [2020-10-27 14:30:00,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2020-10-27 14:30:00,801 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:30:00,801 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:30:00,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 14:30:00,802 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:30:00,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:30:00,802 INFO L82 PathProgramCache]: Analyzing trace with hash 776880145, now seen corresponding path program 31 times [2020-10-27 14:30:00,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:30:00,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1274535040] [2020-10-27 14:30:00,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:30:00,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:00,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:01,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:01,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:01,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:03,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:05,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:05,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 254 [2020-10-27 14:30:05,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:30:05,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5041 [2020-10-27 14:30:05,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:05,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-27 14:30:05,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 143 [2020-10-27 14:30:05,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 14:30:05,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:07,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:30:07,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:07,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:07,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:07,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:30:07,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:07,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:30:07,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:07,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:07,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:30:07,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:07,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:07,815 INFO L134 CoverageAnalysis]: Checked inductivity of 3472 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 2976 trivial. 0 not checked. [2020-10-27 14:30:07,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1274535040] [2020-10-27 14:30:07,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:30:07,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-27 14:30:07,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542512851] [2020-10-27 14:30:07,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-27 14:30:07,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:30:07,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-27 14:30:07,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 14:30:07,818 INFO L87 Difference]: Start difference. First operand 249 states and 256 transitions. Second operand 35 states. [2020-10-27 14:30:09,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:30:09,315 INFO L93 Difference]: Finished difference Result 467 states and 487 transitions. [2020-10-27 14:30:09,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 14:30:09,316 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 244 [2020-10-27 14:30:09,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:30:09,318 INFO L225 Difference]: With dead ends: 467 [2020-10-27 14:30:09,318 INFO L226 Difference]: Without dead ends: 256 [2020-10-27 14:30:09,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 14:30:09,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-10-27 14:30:09,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2020-10-27 14:30:09,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-10-27 14:30:09,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 263 transitions. [2020-10-27 14:30:09,331 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 263 transitions. Word has length 244 [2020-10-27 14:30:09,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:30:09,332 INFO L481 AbstractCegarLoop]: Abstraction has 256 states and 263 transitions. [2020-10-27 14:30:09,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-27 14:30:09,332 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 263 transitions. [2020-10-27 14:30:09,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2020-10-27 14:30:09,334 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:30:09,334 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:30:09,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 14:30:09,334 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:30:09,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:30:09,335 INFO L82 PathProgramCache]: Analyzing trace with hash 200671238, now seen corresponding path program 32 times [2020-10-27 14:30:09,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:30:09,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [539186030] [2020-10-27 14:30:09,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:30:09,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:09,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:09,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:10,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:10,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:12,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:14,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:14,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 261 [2020-10-27 14:30:14,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:30:14,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-27 14:30:14,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:14,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-27 14:30:14,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 147 [2020-10-27 14:30:14,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 14:30:14,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:16,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:30:16,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:16,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:16,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:16,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:30:16,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:16,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:30:16,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:16,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:16,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:30:16,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:16,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:16,447 INFO L134 CoverageAnalysis]: Checked inductivity of 3696 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 3168 trivial. 0 not checked. [2020-10-27 14:30:16,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [539186030] [2020-10-27 14:30:16,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:30:16,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-27 14:30:16,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572846685] [2020-10-27 14:30:16,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-27 14:30:16,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:30:16,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-27 14:30:16,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 14:30:16,450 INFO L87 Difference]: Start difference. First operand 256 states and 263 transitions. Second operand 36 states. [2020-10-27 14:30:18,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:30:18,092 INFO L93 Difference]: Finished difference Result 480 states and 500 transitions. [2020-10-27 14:30:18,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 14:30:18,093 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 251 [2020-10-27 14:30:18,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:30:18,095 INFO L225 Difference]: With dead ends: 480 [2020-10-27 14:30:18,095 INFO L226 Difference]: Without dead ends: 263 [2020-10-27 14:30:18,096 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 14:30:18,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-10-27 14:30:18,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2020-10-27 14:30:18,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2020-10-27 14:30:18,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 270 transitions. [2020-10-27 14:30:18,105 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 270 transitions. Word has length 251 [2020-10-27 14:30:18,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:30:18,105 INFO L481 AbstractCegarLoop]: Abstraction has 263 states and 270 transitions. [2020-10-27 14:30:18,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-27 14:30:18,105 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 270 transitions. [2020-10-27 14:30:18,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2020-10-27 14:30:18,106 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:30:18,106 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:30:18,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 14:30:18,107 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:30:18,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:30:18,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1507868815, now seen corresponding path program 33 times [2020-10-27 14:30:18,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:30:18,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [349407729] [2020-10-27 14:30:18,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:30:18,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:18,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:18,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:18,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:18,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:21,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:23,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:23,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 268 [2020-10-27 14:30:23,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:30:23,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-27 14:30:23,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:23,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-27 14:30:23,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 151 [2020-10-27 14:30:23,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 14:30:23,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:25,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:30:25,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:25,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:25,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:25,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:30:25,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:25,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:30:25,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:25,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:25,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:30:25,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:25,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:25,383 INFO L134 CoverageAnalysis]: Checked inductivity of 3927 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 3366 trivial. 0 not checked. [2020-10-27 14:30:25,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [349407729] [2020-10-27 14:30:25,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:30:25,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-27 14:30:25,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220191851] [2020-10-27 14:30:25,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-27 14:30:25,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:30:25,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-27 14:30:25,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 14:30:25,386 INFO L87 Difference]: Start difference. First operand 263 states and 270 transitions. Second operand 37 states. [2020-10-27 14:30:26,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:30:26,989 INFO L93 Difference]: Finished difference Result 493 states and 513 transitions. [2020-10-27 14:30:26,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 14:30:26,990 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 258 [2020-10-27 14:30:26,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:30:26,992 INFO L225 Difference]: With dead ends: 493 [2020-10-27 14:30:26,992 INFO L226 Difference]: Without dead ends: 270 [2020-10-27 14:30:26,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 14:30:26,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2020-10-27 14:30:27,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 270. [2020-10-27 14:30:27,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-10-27 14:30:27,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 277 transitions. [2020-10-27 14:30:27,003 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 277 transitions. Word has length 258 [2020-10-27 14:30:27,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:30:27,003 INFO L481 AbstractCegarLoop]: Abstraction has 270 states and 277 transitions. [2020-10-27 14:30:27,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-27 14:30:27,004 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 277 transitions. [2020-10-27 14:30:27,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2020-10-27 14:30:27,005 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:30:27,005 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:30:27,006 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 14:30:27,006 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:30:27,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:30:27,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1735446106, now seen corresponding path program 34 times [2020-10-27 14:30:27,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:30:27,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1625450868] [2020-10-27 14:30:27,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:30:27,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:27,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:27,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:27,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:27,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking...