/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/eca-rers2012/Problem12_label50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 17:50:07,907 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 17:50:07,910 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 17:50:07,955 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 17:50:07,956 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 17:50:07,958 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 17:50:07,960 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 17:50:07,963 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 17:50:07,965 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 17:50:07,967 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 17:50:07,968 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 17:50:07,970 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 17:50:07,970 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 17:50:07,972 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 17:50:07,974 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 17:50:07,975 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 17:50:07,977 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 17:50:07,978 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 17:50:07,981 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 17:50:07,985 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 17:50:07,989 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 17:50:07,993 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 17:50:08,000 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 17:50:08,001 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 17:50:08,027 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 17:50:08,028 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 17:50:08,028 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 17:50:08,030 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 17:50:08,032 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 17:50:08,034 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 17:50:08,035 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 17:50:08,036 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 17:50:08,038 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 17:50:08,040 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 17:50:08,041 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 17:50:08,042 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 17:50:08,043 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 17:50:08,043 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 17:50:08,044 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 17:50:08,045 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 17:50:08,046 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 17:50:08,047 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 17:50:08,112 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 17:50:08,112 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 17:50:08,116 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 17:50:08,117 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 17:50:08,117 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 17:50:08,117 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 17:50:08,118 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 17:50:08,118 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 17:50:08,118 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 17:50:08,118 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 17:50:08,120 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 17:50:08,120 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 17:50:08,120 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 17:50:08,120 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 17:50:08,121 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 17:50:08,121 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 17:50:08,121 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 17:50:08,121 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 17:50:08,122 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 17:50:08,122 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 17:50:08,122 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 17:50:08,123 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 17:50:08,123 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 17:50:08,123 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 17:50:08,123 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 17:50:08,124 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 17:50:08,124 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 17:50:08,124 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 17:50:08,124 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 17:50:08,125 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 17:50:08,554 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 17:50:08,597 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 17:50:08,601 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 17:50:08,602 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 17:50:08,605 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 17:50:08,610 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label50.c [2020-10-27 17:50:08,713 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/200bba74c/5f6e6d0d65f647a6937dac2906680a39/FLAGe73fd9fdf [2020-10-27 17:50:09,899 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 17:50:09,900 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem12_label50.c [2020-10-27 17:50:09,935 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/200bba74c/5f6e6d0d65f647a6937dac2906680a39/FLAGe73fd9fdf [2020-10-27 17:50:10,231 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/200bba74c/5f6e6d0d65f647a6937dac2906680a39 [2020-10-27 17:50:10,236 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 17:50:10,245 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 17:50:10,249 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 17:50:10,249 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 17:50:10,253 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 17:50:10,254 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:50:10" (1/1) ... [2020-10-27 17:50:10,259 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fcb6a42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:50:10, skipping insertion in model container [2020-10-27 17:50:10,259 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:50:10" (1/1) ... [2020-10-27 17:50:10,268 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 17:50:10,494 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 17:50:11,828 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 17:50:11,845 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 17:50:12,563 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 17:50:12,601 INFO L208 MainTranslator]: Completed translation [2020-10-27 17:50:12,603 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:50:12 WrapperNode [2020-10-27 17:50:12,603 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 17:50:12,605 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 17:50:12,605 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 17:50:12,605 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 17:50:12,620 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:50:12" (1/1) ... [2020-10-27 17:50:12,622 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:50:12" (1/1) ... [2020-10-27 17:50:12,681 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:50:12" (1/1) ... [2020-10-27 17:50:12,682 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:50:12" (1/1) ... [2020-10-27 17:50:12,890 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:50:12" (1/1) ... [2020-10-27 17:50:12,920 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:50:12" (1/1) ... [2020-10-27 17:50:12,949 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:50:12" (1/1) ... [2020-10-27 17:50:12,981 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 17:50:12,982 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 17:50:12,983 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 17:50:12,983 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 17:50:12,984 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:50:12" (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 17:50:13,071 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 17:50:13,072 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 17:50:13,072 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 17:50:13,072 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 17:50:13,072 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 17:50:13,072 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-27 17:50:13,072 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-27 17:50:13,073 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 17:50:13,073 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 17:50:13,073 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 17:50:13,073 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-27 17:50:13,073 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-27 17:50:13,073 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 17:50:13,074 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 17:50:13,074 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 17:50:13,074 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 17:50:13,074 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 17:50:13,074 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 17:50:13,074 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 17:50:13,075 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 17:50:13,075 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 17:50:13,075 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 17:50:13,075 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 17:50:13,075 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 17:50:13,075 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 17:50:18,918 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 17:50:18,918 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 17:50:18,927 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:50:18 BoogieIcfgContainer [2020-10-27 17:50:18,927 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 17:50:18,929 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 17:50:18,929 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 17:50:18,935 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 17:50:18,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 05:50:10" (1/3) ... [2020-10-27 17:50:18,937 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5aea18a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:50:18, skipping insertion in model container [2020-10-27 17:50:18,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:50:12" (2/3) ... [2020-10-27 17:50:18,937 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5aea18a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:50:18, skipping insertion in model container [2020-10-27 17:50:18,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:50:18" (3/3) ... [2020-10-27 17:50:18,940 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem12_label50.c [2020-10-27 17:50:18,955 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 17:50:18,962 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 17:50:18,978 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 17:50:19,025 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 17:50:19,026 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 17:50:19,026 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 17:50:19,026 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 17:50:19,026 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 17:50:19,026 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 17:50:19,026 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 17:50:19,027 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 17:50:19,063 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states. [2020-10-27 17:50:19,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 17:50:19,071 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 17:50:19,073 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] [2020-10-27 17:50:19,073 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 17:50:19,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 17:50:19,080 INFO L82 PathProgramCache]: Analyzing trace with hash -2048307116, now seen corresponding path program 1 times [2020-10-27 17:50:19,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 17:50:19,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2115194504] [2020-10-27 17:50:19,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 17:50:19,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:50:19,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:50:19,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:50:19,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 17:50:19,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:50:19,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 636 [2020-10-27 17:50:19,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:50:19,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 17:50:19,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 17:50:19,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 17:50:19,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 17:50:20,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 17:50:20,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:50:20,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:50:20,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:50:20,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 17:50:20,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:50:20,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-27 17:50:20,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:50:20,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:50:20,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:50:20,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 17:50:20,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 17:50:20,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 17:50:20,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2115194504] [2020-10-27 17:50:20,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 17:50:20,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 17:50:20,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343278067] [2020-10-27 17:50:20,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 17:50:20,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 17:50:20,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 17:50:20,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 17:50:20,251 INFO L87 Difference]: Start difference. First operand 843 states. Second operand 4 states. [2020-10-27 17:50:20,404 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-27 17:50:32,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 17:50:32,345 INFO L93 Difference]: Finished difference Result 2492 states and 4754 transitions. [2020-10-27 17:50:32,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 17:50:32,347 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-27 17:50:32,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 17:50:32,381 INFO L225 Difference]: With dead ends: 2492 [2020-10-27 17:50:32,381 INFO L226 Difference]: Without dead ends: 1569 [2020-10-27 17:50:32,395 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 17:50:32,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1569 states. [2020-10-27 17:50:32,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1569 to 1565. [2020-10-27 17:50:32,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1565 states. [2020-10-27 17:50:32,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1565 states to 1565 states and 2485 transitions. [2020-10-27 17:50:32,560 INFO L78 Accepts]: Start accepts. Automaton has 1565 states and 2485 transitions. Word has length 25 [2020-10-27 17:50:32,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 17:50:32,561 INFO L481 AbstractCegarLoop]: Abstraction has 1565 states and 2485 transitions. [2020-10-27 17:50:32,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 17:50:32,562 INFO L276 IsEmpty]: Start isEmpty. Operand 1565 states and 2485 transitions. [2020-10-27 17:50:32,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-27 17:50:32,570 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 17:50:32,571 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 17:50:32,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 17:50:32,571 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 17:50:32,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 17:50:32,574 INFO L82 PathProgramCache]: Analyzing trace with hash 419225565, now seen corresponding path program 1 times [2020-10-27 17:50:32,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 17:50:32,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2078221753] [2020-10-27 17:50:32,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 17:50:32,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:50:32,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:50:33,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:50:33,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:50:33,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-27 17:50:33,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 17:50:33,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 938 [2020-10-27 17:50:33,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:50:33,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 17:50:33,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-27 17:50:33,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 17:50:33,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 17:50:33,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 17:50:33,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:50:33,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:50:33,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:50:33,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 17:50:33,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:50:33,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 17:50:33,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:50:33,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:50:33,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:50:33,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:50:33,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:50:33,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 17:50:33,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:50:33,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:50:33,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:50:33,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 17:50:33,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:50:33,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 102 [2020-10-27 17:50:33,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:50:33,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:50:33,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:50:33,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 17:50:33,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 17:50:33,945 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 17:50:33,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2078221753] [2020-10-27 17:50:33,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 17:50:33,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 17:50:33,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070637433] [2020-10-27 17:50:33,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 17:50:33,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 17:50:33,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 17:50:33,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 17:50:33,952 INFO L87 Difference]: Start difference. First operand 1565 states and 2485 transitions. Second operand 5 states. [2020-10-27 17:50:34,401 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 17:50:47,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 17:50:47,356 INFO L93 Difference]: Finished difference Result 4688 states and 7520 transitions. [2020-10-27 17:50:47,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 17:50:47,359 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 104 [2020-10-27 17:50:47,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 17:50:47,385 INFO L225 Difference]: With dead ends: 4688 [2020-10-27 17:50:47,386 INFO L226 Difference]: Without dead ends: 3129 [2020-10-27 17:50:47,391 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 17:50:47,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3129 states. [2020-10-27 17:50:47,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3129 to 3121. [2020-10-27 17:50:47,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3121 states. [2020-10-27 17:50:47,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3121 states to 3121 states and 4448 transitions. [2020-10-27 17:50:47,524 INFO L78 Accepts]: Start accepts. Automaton has 3121 states and 4448 transitions. Word has length 104 [2020-10-27 17:50:47,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 17:50:47,525 INFO L481 AbstractCegarLoop]: Abstraction has 3121 states and 4448 transitions. [2020-10-27 17:50:47,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 17:50:47,526 INFO L276 IsEmpty]: Start isEmpty. Operand 3121 states and 4448 transitions. [2020-10-27 17:50:47,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-27 17:50:47,539 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 17:50:47,539 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 17:50:47,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 17:50:47,539 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 17:50:47,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 17:50:47,541 INFO L82 PathProgramCache]: Analyzing trace with hash -351140779, now seen corresponding path program 1 times [2020-10-27 17:50:47,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 17:50:47,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [704283801] [2020-10-27 17:50:47,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 17:50:47,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:50:47,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:50:47,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:50:48,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:50:48,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-27 17:50:48,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 17:50:48,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 937 [2020-10-27 17:50:48,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:50:48,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 17:50:48,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 90 [2020-10-27 17:50:48,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 17:50:48,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:50:48,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 17:50:48,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:50:48,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:50:48,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:50:48,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 17:50:48,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:50:48,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 17:50:48,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:50:48,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:50:48,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:50:48,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:50:48,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:50:48,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 17:50:48,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:50:48,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:50:48,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:50:48,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 17:50:48,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:50:48,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 79 [2020-10-27 17:50:48,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:50:48,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:50:48,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:50:48,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-27 17:50:48,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:50:48,837 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 17:50:48,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [704283801] [2020-10-27 17:50:48,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 17:50:48,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 17:50:48,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335557701] [2020-10-27 17:50:48,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 17:50:48,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 17:50:48,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 17:50:48,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 17:50:48,840 INFO L87 Difference]: Start difference. First operand 3121 states and 4448 transitions. Second operand 5 states. [2020-10-27 17:51:02,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 17:51:02,771 INFO L93 Difference]: Finished difference Result 9356 states and 13535 transitions. [2020-10-27 17:51:02,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 17:51:02,773 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 105 [2020-10-27 17:51:02,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 17:51:02,813 INFO L225 Difference]: With dead ends: 9356 [2020-10-27 17:51:02,813 INFO L226 Difference]: Without dead ends: 6241 [2020-10-27 17:51:02,822 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 17:51:02,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6241 states. [2020-10-27 17:51:02,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6241 to 6233. [2020-10-27 17:51:02,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6233 states. [2020-10-27 17:51:03,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6233 states to 6233 states and 8353 transitions. [2020-10-27 17:51:03,003 INFO L78 Accepts]: Start accepts. Automaton has 6233 states and 8353 transitions. Word has length 105 [2020-10-27 17:51:03,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 17:51:03,004 INFO L481 AbstractCegarLoop]: Abstraction has 6233 states and 8353 transitions. [2020-10-27 17:51:03,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 17:51:03,005 INFO L276 IsEmpty]: Start isEmpty. Operand 6233 states and 8353 transitions. [2020-10-27 17:51:03,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-27 17:51:03,006 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 17:51:03,006 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 17:51:03,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 17:51:03,007 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 17:51:03,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 17:51:03,007 INFO L82 PathProgramCache]: Analyzing trace with hash 342003693, now seen corresponding path program 1 times [2020-10-27 17:51:03,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 17:51:03,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [408433984] [2020-10-27 17:51:03,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 17:51:03,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:51:03,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:51:03,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:51:04,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:51:04,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:51:04,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-27 17:51:04,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 17:51:04,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1110 [2020-10-27 17:51:04,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:51:04,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 17:51:04,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 17:51:04,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 17:51:04,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:51:04,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 17:51:04,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:51:04,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:51:04,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:51:04,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 17:51:04,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:51:04,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 17:51:04,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:51:04,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:51:04,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:51:04,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:51:04,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:51:04,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 17:51:04,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:51:04,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:51:04,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:51:04,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 17:51:04,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:51:04,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 103 [2020-10-27 17:51:04,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:51:04,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:51:04,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:51:04,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 17:51:04,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 17:51:04,494 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 17:51:04,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [408433984] [2020-10-27 17:51:04,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 17:51:04,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 17:51:04,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212310736] [2020-10-27 17:51:04,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 17:51:04,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 17:51:04,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 17:51:04,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 17:51:04,505 INFO L87 Difference]: Start difference. First operand 6233 states and 8353 transitions. Second operand 5 states. [2020-10-27 17:51:19,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 17:51:19,050 INFO L93 Difference]: Finished difference Result 15571 states and 21413 transitions. [2020-10-27 17:51:19,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 17:51:19,054 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 112 [2020-10-27 17:51:19,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 17:51:19,103 INFO L225 Difference]: With dead ends: 15571 [2020-10-27 17:51:19,104 INFO L226 Difference]: Without dead ends: 9344 [2020-10-27 17:51:19,123 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 17:51:19,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9344 states. [2020-10-27 17:51:19,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9344 to 9336. [2020-10-27 17:51:19,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9336 states. [2020-10-27 17:51:19,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9336 states to 9336 states and 11810 transitions. [2020-10-27 17:51:19,409 INFO L78 Accepts]: Start accepts. Automaton has 9336 states and 11810 transitions. Word has length 112 [2020-10-27 17:51:19,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 17:51:19,411 INFO L481 AbstractCegarLoop]: Abstraction has 9336 states and 11810 transitions. [2020-10-27 17:51:19,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 17:51:19,411 INFO L276 IsEmpty]: Start isEmpty. Operand 9336 states and 11810 transitions. [2020-10-27 17:51:19,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-27 17:51:19,413 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 17:51:19,413 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 17:51:19,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 17:51:19,413 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 17:51:19,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 17:51:19,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1567261083, now seen corresponding path program 1 times [2020-10-27 17:51:19,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 17:51:19,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [859465462] [2020-10-27 17:51:19,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 17:51:19,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:51:19,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:51:19,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:51:20,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:51:20,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-27 17:51:20,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 17:51:20,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 968 [2020-10-27 17:51:20,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:51:20,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 17:51:20,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 98 [2020-10-27 17:51:20,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 17:51:20,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:51:20,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 17:51:20,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:51:20,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:51:20,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:51:20,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 17:51:20,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:51:20,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 17:51:20,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:51:20,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:51:20,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:51:20,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:51:20,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:51:20,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 17:51:20,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:51:20,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:51:20,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:51:20,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-27 17:51:20,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:51:20,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 86 [2020-10-27 17:51:20,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:51:20,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:51:20,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:51:20,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-27 17:51:20,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:51:20,759 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 17:51:20,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [859465462] [2020-10-27 17:51:20,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 17:51:20,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 17:51:20,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396718324] [2020-10-27 17:51:20,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 17:51:20,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 17:51:20,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 17:51:20,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 17:51:20,762 INFO L87 Difference]: Start difference. First operand 9336 states and 11810 transitions. Second operand 6 states. [2020-10-27 17:51:39,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 17:51:39,757 INFO L93 Difference]: Finished difference Result 23323 states and 30363 transitions. [2020-10-27 17:51:39,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 17:51:39,763 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 113 [2020-10-27 17:51:39,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 17:51:39,820 INFO L225 Difference]: With dead ends: 23323 [2020-10-27 17:51:39,820 INFO L226 Difference]: Without dead ends: 13993 [2020-10-27 17:51:39,843 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 17:51:39,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13993 states. [2020-10-27 17:51:40,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13993 to 13989. [2020-10-27 17:51:40,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13989 states. [2020-10-27 17:51:40,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13989 states to 13989 states and 17393 transitions. [2020-10-27 17:51:40,234 INFO L78 Accepts]: Start accepts. Automaton has 13989 states and 17393 transitions. Word has length 113 [2020-10-27 17:51:40,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 17:51:40,234 INFO L481 AbstractCegarLoop]: Abstraction has 13989 states and 17393 transitions. [2020-10-27 17:51:40,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 17:51:40,235 INFO L276 IsEmpty]: Start isEmpty. Operand 13989 states and 17393 transitions. [2020-10-27 17:51:40,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-10-27 17:51:40,238 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 17:51:40,239 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 17:51:40,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 17:51:40,239 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 17:51:40,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 17:51:40,240 INFO L82 PathProgramCache]: Analyzing trace with hash -784424278, now seen corresponding path program 1 times [2020-10-27 17:51:40,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 17:51:40,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [686507209] [2020-10-27 17:51:40,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 17:51:40,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:51:40,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:51:40,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:51:41,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:51:41,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:51:44,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:51:44,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 204 [2020-10-27 17:51:44,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 17:51:44,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4079 [2020-10-27 17:51:44,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:51:44,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 17:51:44,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 177 [2020-10-27 17:51:44,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 17:51:44,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:51:44,587 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 17:51:44,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 17:51:44,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:51:44,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:51:44,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:51:44,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 17:51:44,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:51:44,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 17:51:44,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:51:44,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:51:44,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:51:44,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:51:44,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:51:44,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 17:51:44,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:51:44,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:51:44,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:51:44,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 17:51:44,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:51:44,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-27 17:51:44,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:51:44,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:51:44,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:51:44,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:51:44,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:51:44,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-10-27 17:51:44,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:51:44,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:51:44,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:51:44,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 17:51:44,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:51:44,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-10-27 17:51:44,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:51:44,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:51:44,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:51:44,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-27 17:51:44,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:51:44,859 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2020-10-27 17:51:44,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [686507209] [2020-10-27 17:51:44,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 17:51:44,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 17:51:44,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679150642] [2020-10-27 17:51:44,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 17:51:44,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 17:51:44,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 17:51:44,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 17:51:44,863 INFO L87 Difference]: Start difference. First operand 13989 states and 17393 transitions. Second operand 5 states. [2020-10-27 17:52:01,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 17:52:01,450 INFO L93 Difference]: Finished difference Result 37276 states and 47706 transitions. [2020-10-27 17:52:01,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 17:52:01,452 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 190 [2020-10-27 17:52:01,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 17:52:01,521 INFO L225 Difference]: With dead ends: 37276 [2020-10-27 17:52:01,521 INFO L226 Difference]: Without dead ends: 23293 [2020-10-27 17:52:01,552 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 17:52:01,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23293 states. [2020-10-27 17:52:02,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23293 to 23289. [2020-10-27 17:52:02,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23289 states. [2020-10-27 17:52:02,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23289 states to 23289 states and 28018 transitions. [2020-10-27 17:52:02,255 INFO L78 Accepts]: Start accepts. Automaton has 23289 states and 28018 transitions. Word has length 190 [2020-10-27 17:52:02,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 17:52:02,256 INFO L481 AbstractCegarLoop]: Abstraction has 23289 states and 28018 transitions. [2020-10-27 17:52:02,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 17:52:02,256 INFO L276 IsEmpty]: Start isEmpty. Operand 23289 states and 28018 transitions. [2020-10-27 17:52:02,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2020-10-27 17:52:02,262 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 17:52:02,262 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:52:02,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 17:52:02,262 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 17:52:02,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 17:52:02,263 INFO L82 PathProgramCache]: Analyzing trace with hash -352930898, now seen corresponding path program 1 times [2020-10-27 17:52:02,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 17:52:02,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1935502000] [2020-10-27 17:52:02,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 17:52:02,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:52:02,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:52:02,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:52:02,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:52:03,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:52:03,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 238 [2020-10-27 17:52:03,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 17:52:03,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1394 [2020-10-27 17:52:03,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:52:03,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 17:52:03,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 211 [2020-10-27 17:52:03,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 17:52:03,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:52:03,990 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 17:52:03,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 17:52:03,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:52:03,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:52:04,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:52:04,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 17:52:04,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:52:04,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 17:52:04,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:52:04,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:52:04,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:52:04,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:52:04,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:52:04,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 17:52:04,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:52:04,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:52:04,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:52:04,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 17:52:04,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:52:04,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-27 17:52:04,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:52:04,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:52:04,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:52:04,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:52:04,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:52:04,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-10-27 17:52:04,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:52:04,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:52:04,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:52:04,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-27 17:52:04,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:52:04,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 125 [2020-10-27 17:52:04,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:52:04,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:52:04,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:52:04,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 119 [2020-10-27 17:52:04,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:52:04,350 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-27 17:52:04,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1935502000] [2020-10-27 17:52:04,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 17:52:04,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 17:52:04,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685587966] [2020-10-27 17:52:04,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 17:52:04,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 17:52:04,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 17:52:04,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 17:52:04,353 INFO L87 Difference]: Start difference. First operand 23289 states and 28018 transitions. Second operand 5 states. [2020-10-27 17:52:24,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 17:52:24,838 INFO L93 Difference]: Finished difference Result 65941 states and 81517 transitions. [2020-10-27 17:52:24,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 17:52:24,840 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 224 [2020-10-27 17:52:24,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 17:52:25,012 INFO L225 Difference]: With dead ends: 65941 [2020-10-27 17:52:25,012 INFO L226 Difference]: Without dead ends: 42658 [2020-10-27 17:52:25,069 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 17:52:25,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42658 states. [2020-10-27 17:52:26,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42658 to 41115. [2020-10-27 17:52:26,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41115 states. [2020-10-27 17:52:26,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41115 states to 41115 states and 50236 transitions. [2020-10-27 17:52:26,601 INFO L78 Accepts]: Start accepts. Automaton has 41115 states and 50236 transitions. Word has length 224 [2020-10-27 17:52:26,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 17:52:26,603 INFO L481 AbstractCegarLoop]: Abstraction has 41115 states and 50236 transitions. [2020-10-27 17:52:26,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 17:52:26,604 INFO L276 IsEmpty]: Start isEmpty. Operand 41115 states and 50236 transitions. [2020-10-27 17:52:26,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 365 [2020-10-27 17:52:26,642 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 17:52:26,642 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 17:52:26,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 17:52:26,643 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 17:52:26,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 17:52:26,643 INFO L82 PathProgramCache]: Analyzing trace with hash 932573190, now seen corresponding path program 1 times [2020-10-27 17:52:26,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 17:52:26,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [908555833] [2020-10-27 17:52:26,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 17:52:26,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:52:26,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:52:27,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:52:29,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:52:29,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 378 [2020-10-27 17:52:29,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 17:52:29,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2251 [2020-10-27 17:52:29,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:52:29,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 17:52:29,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 159 [2020-10-27 17:52:29,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 193 [2020-10-27 17:52:29,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:52:29,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 17:52:29,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:52:29,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:52:29,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:52:29,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 17:52:29,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:52:29,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 17:52:29,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:52:29,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:52:29,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:52:29,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:52:29,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:52:29,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 17:52:29,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:52:29,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:52:29,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:52:29,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-27 17:52:29,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:52:29,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 144 [2020-10-27 17:52:29,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:52:29,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:52:29,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:52:29,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 144 [2020-10-27 17:52:29,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:52:29,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2020-10-27 17:52:29,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:52:29,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:52:29,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:52:29,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 191 [2020-10-27 17:52:29,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:52:29,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 300 [2020-10-27 17:52:29,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:52:29,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 17:52:29,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 17:52:29,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 191 [2020-10-27 17:52:29,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:52:30,335 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 180 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 17:52:30,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [908555833] [2020-10-27 17:52:30,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 17:52:30,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 17:52:30,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039111399] [2020-10-27 17:52:30,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 17:52:30,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 17:52:30,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 17:52:30,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 17:52:30,339 INFO L87 Difference]: Start difference. First operand 41115 states and 50236 transitions. Second operand 7 states. [2020-10-27 17:52:50,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 17:52:50,386 INFO L93 Difference]: Finished difference Result 96626 states and 121982 transitions. [2020-10-27 17:52:50,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 17:52:50,389 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 364 [2020-10-27 17:52:50,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 17:52:50,554 INFO L225 Difference]: With dead ends: 96626 [2020-10-27 17:52:50,554 INFO L226 Difference]: Without dead ends: 55517 [2020-10-27 17:52:50,635 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-27 17:52:50,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55517 states. [2020-10-27 17:52:51,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55517 to 55496. [2020-10-27 17:52:51,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55496 states. [2020-10-27 17:52:51,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55496 states to 55496 states and 67360 transitions. [2020-10-27 17:52:51,954 INFO L78 Accepts]: Start accepts. Automaton has 55496 states and 67360 transitions. Word has length 364 [2020-10-27 17:52:51,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 17:52:51,955 INFO L481 AbstractCegarLoop]: Abstraction has 55496 states and 67360 transitions. [2020-10-27 17:52:51,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 17:52:51,956 INFO L276 IsEmpty]: Start isEmpty. Operand 55496 states and 67360 transitions. [2020-10-27 17:52:52,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2020-10-27 17:52:52,003 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 17:52:52,004 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:52:52,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 17:52:52,004 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 17:52:52,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 17:52:52,005 INFO L82 PathProgramCache]: Analyzing trace with hash -605406935, now seen corresponding path program 1 times [2020-10-27 17:52:52,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 17:52:52,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1225883479] [2020-10-27 17:52:52,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 17:52:52,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:52:52,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:52:52,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:52:54,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:52:57,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:52:57,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 470 [2020-10-27 17:52:57,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 17:52:57,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5050 [2020-10-27 17:52:57,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:52:57,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 17:52:57,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 158 [2020-10-27 17:52:57,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 286 [2020-10-27 17:52:57,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 17:52:57,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 17:52:57,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:52:57,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:52:57,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:52:57,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 17:52:57,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:52:57,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 17:52:57,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:52:57,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:52:57,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:52:57,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:52:57,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:52:57,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 17:52:57,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:52:57,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:52:57,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:52:57,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-27 17:52:57,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:52:57,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 139 [2020-10-27 17:52:57,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:52:57,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:52:57,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:52:57,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 143 [2020-10-27 17:52:57,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:52:57,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2020-10-27 17:52:57,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:52:57,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:52:57,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:52:57,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:52:57,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-27 17:52:57,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 17:52:57,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 194 [2020-10-27 17:52:57,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:52:57,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:52:57,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:52:57,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-27 17:52:57,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:52:57,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 247 [2020-10-27 17:52:57,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:52:57,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:52:58,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:52:58,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 191 [2020-10-27 17:52:58,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:52:58,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 360 [2020-10-27 17:52:58,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:52:58,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 17:52:58,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 17:52:58,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 191 [2020-10-27 17:52:58,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:52:58,774 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 286 proven. 4 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-10-27 17:52:58,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1225883479] [2020-10-27 17:52:58,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 17:52:58,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 17:52:58,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975678722] [2020-10-27 17:52:58,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 17:52:58,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 17:52:58,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 17:52:58,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 17:52:58,778 INFO L87 Difference]: Start difference. First operand 55496 states and 67360 transitions. Second operand 8 states. [2020-10-27 17:52:58,945 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 17:53:30,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 17:53:30,680 INFO L93 Difference]: Finished difference Result 166692 states and 213549 transitions. [2020-10-27 17:53:30,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 17:53:30,682 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 454 [2020-10-27 17:53:30,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 17:53:31,068 INFO L225 Difference]: With dead ends: 166692 [2020-10-27 17:53:31,069 INFO L226 Difference]: Without dead ends: 111969 [2020-10-27 17:53:31,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-27 17:53:31,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111969 states. [2020-10-27 17:53:34,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111969 to 108793. [2020-10-27 17:53:34,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108793 states. [2020-10-27 17:53:34,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108793 states to 108793 states and 137598 transitions. [2020-10-27 17:53:34,836 INFO L78 Accepts]: Start accepts. Automaton has 108793 states and 137598 transitions. Word has length 454 [2020-10-27 17:53:34,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 17:53:34,837 INFO L481 AbstractCegarLoop]: Abstraction has 108793 states and 137598 transitions. [2020-10-27 17:53:34,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 17:53:34,837 INFO L276 IsEmpty]: Start isEmpty. Operand 108793 states and 137598 transitions. [2020-10-27 17:53:34,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 518 [2020-10-27 17:53:34,962 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 17:53:34,963 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:53:34,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 17:53:34,964 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 17:53:34,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 17:53:34,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1990072730, now seen corresponding path program 1 times [2020-10-27 17:53:34,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 17:53:34,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1272372224] [2020-10-27 17:53:34,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 17:53:35,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:53:35,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:53:36,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:53:37,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:53:40,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:53:40,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 533 [2020-10-27 17:53:40,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 17:53:40,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5069 [2020-10-27 17:53:40,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:53:40,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 17:53:40,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 503 [2020-10-27 17:53:40,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 17:53:40,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:53:40,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 17:53:40,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:53:40,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:53:40,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:53:40,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 17:53:40,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:53:40,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 17:53:40,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:53:40,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:53:40,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:53:40,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:53:40,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:53:40,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 17:53:40,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:53:40,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:53:40,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:53:40,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 17:53:40,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:53:40,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 17:53:40,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:53:40,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:53:40,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:53:40,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:53:40,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:53:40,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-10-27 17:53:40,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:53:40,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:53:41,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:53:41,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 420 [2020-10-27 17:53:41,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:53:41,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 527 [2020-10-27 17:53:41,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:53:41,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:53:41,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:53:41,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 411 [2020-10-27 17:53:41,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:53:41,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2020-10-27 17:53:41,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:53:41,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:53:41,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:53:41,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-27 17:53:41,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:53:41,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 110 [2020-10-27 17:53:41,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:53:41,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:53:41,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:53:41,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 126 [2020-10-27 17:53:41,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:53:41,998 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-27 17:53:41,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1272372224] [2020-10-27 17:53:41,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 17:53:41,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 17:53:41,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632331768] [2020-10-27 17:53:42,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 17:53:42,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 17:53:42,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 17:53:42,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 17:53:42,001 INFO L87 Difference]: Start difference. First operand 108793 states and 137598 transitions. Second operand 5 states.