/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=SHALLOWEST --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/Problem13_label20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 23:07:54,725 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 23:07:54,729 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 23:07:54,775 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 23:07:54,776 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 23:07:54,778 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 23:07:54,780 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 23:07:54,783 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 23:07:54,786 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 23:07:54,789 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 23:07:54,791 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 23:07:54,793 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 23:07:54,794 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 23:07:54,796 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 23:07:54,798 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 23:07:54,800 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 23:07:54,802 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 23:07:54,804 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 23:07:54,845 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 23:07:54,855 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 23:07:54,864 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 23:07:54,880 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 23:07:54,884 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 23:07:54,886 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 23:07:54,894 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 23:07:54,900 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 23:07:54,900 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 23:07:54,902 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 23:07:54,903 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 23:07:54,906 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 23:07:54,907 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 23:07:54,908 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 23:07:54,909 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 23:07:54,911 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 23:07:54,912 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 23:07:54,913 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 23:07:54,914 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 23:07:54,914 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 23:07:54,915 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 23:07:54,916 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 23:07:54,917 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 23:07:54,919 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 [2020-10-26 23:07:54,952 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 23:07:54,953 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 23:07:54,955 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 23:07:54,955 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 23:07:54,956 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 23:07:54,956 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 23:07:54,956 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 23:07:54,957 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 23:07:54,957 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 23:07:54,957 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 23:07:54,958 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 23:07:54,958 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 23:07:54,958 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 23:07:54,958 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 23:07:54,959 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 23:07:54,959 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 23:07:54,959 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 23:07:54,960 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 23:07:54,960 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 23:07:54,960 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 23:07:54,960 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 23:07:54,961 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 23:07:54,961 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 23:07:54,961 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 23:07:54,962 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 23:07:54,962 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 23:07:54,963 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 23:07:54,963 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 23:07:54,963 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 23:07:54,963 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 23:07:55,438 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 23:07:55,480 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 23:07:55,485 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 23:07:55,487 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 23:07:55,488 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 23:07:55,489 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label20.c [2020-10-26 23:07:55,619 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ad64671c7/f702895580ff402f98e1b5a576c44f1e/FLAGf206e87eb [2020-10-26 23:07:57,160 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 23:07:57,161 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem13_label20.c [2020-10-26 23:07:57,226 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ad64671c7/f702895580ff402f98e1b5a576c44f1e/FLAGf206e87eb [2020-10-26 23:07:57,366 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ad64671c7/f702895580ff402f98e1b5a576c44f1e [2020-10-26 23:07:57,371 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 23:07:57,381 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 23:07:57,388 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 23:07:57,388 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 23:07:57,394 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 23:07:57,397 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:07:57" (1/1) ... [2020-10-26 23:07:57,403 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@301ec25a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:07:57, skipping insertion in model container [2020-10-26 23:07:57,403 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:07:57" (1/1) ... [2020-10-26 23:07:57,415 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 23:07:57,619 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 23:07:59,418 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 23:07:59,467 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 23:08:00,397 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 23:08:00,438 INFO L208 MainTranslator]: Completed translation [2020-10-26 23:08:00,439 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:08:00 WrapperNode [2020-10-26 23:08:00,439 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 23:08:00,441 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 23:08:00,442 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 23:08:00,442 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 23:08:00,462 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:08:00" (1/1) ... [2020-10-26 23:08:00,464 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:08:00" (1/1) ... [2020-10-26 23:08:00,550 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:08:00" (1/1) ... [2020-10-26 23:08:00,551 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:08:00" (1/1) ... [2020-10-26 23:08:00,715 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:08:00" (1/1) ... [2020-10-26 23:08:00,750 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:08:00" (1/1) ... [2020-10-26 23:08:00,930 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:08:00" (1/1) ... [2020-10-26 23:08:01,056 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 23:08:01,058 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 23:08:01,059 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 23:08:01,059 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 23:08:01,060 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:08:00" (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 [2020-10-26 23:08:01,156 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 23:08:01,156 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 23:08:01,157 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 23:08:01,157 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 23:08:01,158 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-26 23:08:01,158 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-26 23:08:01,158 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-26 23:08:01,158 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 23:08:01,159 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 23:08:01,159 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-26 23:08:01,160 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-26 23:08:01,160 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-26 23:08:01,160 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 23:08:01,160 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 23:08:01,161 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 23:08:01,162 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 23:08:01,162 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 23:08:01,162 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 23:08:01,162 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 23:08:01,162 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 23:08:01,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 23:08:01,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 23:08:01,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 23:08:01,163 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 23:08:01,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 23:08:12,163 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 23:08:12,164 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 23:08:12,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:08:12 BoogieIcfgContainer [2020-10-26 23:08:12,170 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 23:08:12,175 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 23:08:12,176 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 23:08:12,180 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 23:08:12,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 11:07:57" (1/3) ... [2020-10-26 23:08:12,182 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4509d607 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:08:12, skipping insertion in model container [2020-10-26 23:08:12,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:08:00" (2/3) ... [2020-10-26 23:08:12,183 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4509d607 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:08:12, skipping insertion in model container [2020-10-26 23:08:12,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:08:12" (3/3) ... [2020-10-26 23:08:12,186 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label20.c [2020-10-26 23:08:12,201 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 23:08:12,210 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 23:08:12,227 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 23:08:12,266 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 23:08:12,267 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 23:08:12,267 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 23:08:12,267 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 23:08:12,267 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 23:08:12,267 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 23:08:12,267 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 23:08:12,268 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 23:08:12,311 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states. [2020-10-26 23:08:12,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-26 23:08:12,322 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:08:12,323 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:08:12,324 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:08:12,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:08:12,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1973932058, now seen corresponding path program 1 times [2020-10-26 23:08:12,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:08:12,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [570282453] [2020-10-26 23:08:12,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:08:12,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:08:12,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:08:13,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:08:13,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-26 23:08:13,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:08:13,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 686 [2020-10-26 23:08:13,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:08:13,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:08:13,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:08:13,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-26 23:08:13,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 23:08:13,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:08:13,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:08:13,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:08:13,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:08:13,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:08:13,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:08:13,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-26 23:08:13,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:08:13,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:08:13,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:08:13,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:08:13,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:08:13,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:08:13,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [570282453] [2020-10-26 23:08:13,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:08:13,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 23:08:13,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564786541] [2020-10-26 23:08:13,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 23:08:13,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:08:13,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 23:08:13,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 23:08:13,555 INFO L87 Difference]: Start difference. First operand 1123 states. Second operand 4 states. [2020-10-26 23:08:33,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:08:33,441 INFO L93 Difference]: Finished difference Result 3112 states and 5735 transitions. [2020-10-26 23:08:33,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 23:08:33,444 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 62 [2020-10-26 23:08:33,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:08:33,495 INFO L225 Difference]: With dead ends: 3112 [2020-10-26 23:08:33,496 INFO L226 Difference]: Without dead ends: 1904 [2020-10-26 23:08:33,509 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 23:08:33,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1904 states. [2020-10-26 23:08:33,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1904 to 1884. [2020-10-26 23:08:33,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1884 states. [2020-10-26 23:08:33,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1884 states to 1884 states and 2891 transitions. [2020-10-26 23:08:33,703 INFO L78 Accepts]: Start accepts. Automaton has 1884 states and 2891 transitions. Word has length 62 [2020-10-26 23:08:33,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:08:33,703 INFO L481 AbstractCegarLoop]: Abstraction has 1884 states and 2891 transitions. [2020-10-26 23:08:33,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 23:08:33,704 INFO L276 IsEmpty]: Start isEmpty. Operand 1884 states and 2891 transitions. [2020-10-26 23:08:33,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-10-26 23:08:33,710 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:08:33,711 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:08:33,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 23:08:33,711 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:08:33,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:08:33,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1031465406, now seen corresponding path program 1 times [2020-10-26 23:08:33,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:08:33,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1818927774] [2020-10-26 23:08:33,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:08:33,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:08:33,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:08:33,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:08:35,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:08:35,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:08:35,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-26 23:08:35,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:08:35,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2046 [2020-10-26 23:08:35,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:08:35,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:08:35,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:08:35,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-26 23:08:35,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 23:08:35,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:08:35,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:08:35,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:08:35,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:08:35,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:08:35,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:08:35,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-26 23:08:35,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:08:35,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:08:35,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:08:35,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:08:36,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-10-26 23:08:36,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:08:36,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:08:36,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:08:36,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:08:36,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-26 23:08:36,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:08:36,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 186 [2020-10-26 23:08:36,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:08:36,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:08:36,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:08:36,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-26 23:08:36,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:08:36,456 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:08:36,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1818927774] [2020-10-26 23:08:36,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:08:36,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:08:36,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564318041] [2020-10-26 23:08:36,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:08:36,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:08:36,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:08:36,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:08:36,463 INFO L87 Difference]: Start difference. First operand 1884 states and 2891 transitions. Second operand 7 states. [2020-10-26 23:08:58,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:08:58,444 INFO L93 Difference]: Finished difference Result 5679 states and 8693 transitions. [2020-10-26 23:08:58,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 23:08:58,445 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 131 [2020-10-26 23:08:58,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:08:58,470 INFO L225 Difference]: With dead ends: 5679 [2020-10-26 23:08:58,471 INFO L226 Difference]: Without dead ends: 3801 [2020-10-26 23:08:58,478 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-26 23:08:58,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3801 states. [2020-10-26 23:08:58,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3801 to 3709. [2020-10-26 23:08:58,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3709 states. [2020-10-26 23:08:58,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3709 states to 3709 states and 5285 transitions. [2020-10-26 23:08:58,640 INFO L78 Accepts]: Start accepts. Automaton has 3709 states and 5285 transitions. Word has length 131 [2020-10-26 23:08:58,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:08:58,643 INFO L481 AbstractCegarLoop]: Abstraction has 3709 states and 5285 transitions. [2020-10-26 23:08:58,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:08:58,643 INFO L276 IsEmpty]: Start isEmpty. Operand 3709 states and 5285 transitions. [2020-10-26 23:08:58,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-10-26 23:08:58,656 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:08:58,657 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:08:58,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 23:08:58,657 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:08:58,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:08:58,659 INFO L82 PathProgramCache]: Analyzing trace with hash 663806702, now seen corresponding path program 1 times [2020-10-26 23:08:58,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:08:58,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [335638313] [2020-10-26 23:08:58,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:08:58,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:08:58,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:08:59,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:09:00,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:09:00,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 151 [2020-10-26 23:09:00,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:09:00,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1475 [2020-10-26 23:09:00,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:09:00,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:09:00,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:09:00,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-26 23:09:00,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:09:00,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:09:00,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:09:00,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:09:00,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:09:00,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:09:00,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:09:00,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-26 23:09:00,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:09:00,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:09:00,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:09:00,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:09:00,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:09:00,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:09:00,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:09:00,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:09:00,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:09:00,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-26 23:09:00,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:09:00,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 248 [2020-10-26 23:09:00,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:09:00,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:09:00,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:09:00,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-26 23:09:00,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:09:00,843 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:09:00,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [335638313] [2020-10-26 23:09:00,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:09:00,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:09:00,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729011486] [2020-10-26 23:09:00,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:09:00,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:09:00,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:09:00,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:09:00,850 INFO L87 Difference]: Start difference. First operand 3709 states and 5285 transitions. Second operand 7 states. [2020-10-26 23:09:23,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:09:23,745 INFO L93 Difference]: Finished difference Result 11035 states and 15891 transitions. [2020-10-26 23:09:23,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 23:09:23,747 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 139 [2020-10-26 23:09:23,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:09:23,792 INFO L225 Difference]: With dead ends: 11035 [2020-10-26 23:09:23,792 INFO L226 Difference]: Without dead ends: 7332 [2020-10-26 23:09:23,805 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:09:23,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7332 states. [2020-10-26 23:09:24,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7332 to 7162. [2020-10-26 23:09:24,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7162 states. [2020-10-26 23:09:24,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7162 states to 7162 states and 9221 transitions. [2020-10-26 23:09:24,079 INFO L78 Accepts]: Start accepts. Automaton has 7162 states and 9221 transitions. Word has length 139 [2020-10-26 23:09:24,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:09:24,082 INFO L481 AbstractCegarLoop]: Abstraction has 7162 states and 9221 transitions. [2020-10-26 23:09:24,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:09:24,082 INFO L276 IsEmpty]: Start isEmpty. Operand 7162 states and 9221 transitions. [2020-10-26 23:09:24,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-10-26 23:09:24,090 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:09:24,091 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:09:24,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 23:09:24,096 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:09:24,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:09:24,097 INFO L82 PathProgramCache]: Analyzing trace with hash -650478881, now seen corresponding path program 1 times [2020-10-26 23:09:24,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:09:24,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [552524722] [2020-10-26 23:09:24,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:09:24,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:09:24,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:09:24,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:09:25,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:09:25,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 203 [2020-10-26 23:09:25,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:09:25,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 919 [2020-10-26 23:09:25,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:09:25,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:09:25,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 139 [2020-10-26 23:09:25,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-26 23:09:25,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:09:25,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:09:25,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:09:25,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:09:25,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:09:25,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:09:25,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:09:25,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 23:09:25,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:09:25,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:09:25,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:09:25,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:09:25,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:09:25,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:09:25,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:09:25,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:09:25,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:09:25,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-26 23:09:25,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:09:25,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 172 [2020-10-26 23:09:25,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:09:25,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:09:25,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:09:25,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-26 23:09:25,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:09:25,847 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 53 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:09:25,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [552524722] [2020-10-26 23:09:25,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:09:25,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 23:09:25,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784850970] [2020-10-26 23:09:25,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 23:09:25,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:09:25,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 23:09:25,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 23:09:25,850 INFO L87 Difference]: Start difference. First operand 7162 states and 9221 transitions. Second operand 5 states. [2020-10-26 23:09:27,042 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-10-26 23:09:42,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:09:42,349 INFO L93 Difference]: Finished difference Result 11098 states and 14794 transitions. [2020-10-26 23:09:42,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 23:09:42,351 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 191 [2020-10-26 23:09:42,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:09:42,389 INFO L225 Difference]: With dead ends: 11098 [2020-10-26 23:09:42,389 INFO L226 Difference]: Without dead ends: 7181 [2020-10-26 23:09:42,402 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 23:09:42,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7181 states. [2020-10-26 23:09:42,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7181 to 7162. [2020-10-26 23:09:42,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7162 states. [2020-10-26 23:09:42,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7162 states to 7162 states and 9213 transitions. [2020-10-26 23:09:42,620 INFO L78 Accepts]: Start accepts. Automaton has 7162 states and 9213 transitions. Word has length 191 [2020-10-26 23:09:42,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:09:42,621 INFO L481 AbstractCegarLoop]: Abstraction has 7162 states and 9213 transitions. [2020-10-26 23:09:42,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 23:09:42,622 INFO L276 IsEmpty]: Start isEmpty. Operand 7162 states and 9213 transitions. [2020-10-26 23:09:42,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2020-10-26 23:09:42,628 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:09:42,629 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:09:42,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 23:09:42,629 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:09:42,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:09:42,630 INFO L82 PathProgramCache]: Analyzing trace with hash 435613306, now seen corresponding path program 1 times [2020-10-26 23:09:42,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:09:42,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2124345639] [2020-10-26 23:09:42,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:09:42,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:09:42,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:09:42,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:09:43,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:09:47,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:09:47,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 246 [2020-10-26 23:09:47,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:09:47,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4988 [2020-10-26 23:09:47,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:09:47,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:09:47,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:09:47,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-10-26 23:09:47,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:09:47,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:09:47,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:09:47,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:09:47,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:09:47,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:09:47,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:09:47,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-26 23:09:47,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:09:47,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:09:47,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:09:47,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:09:47,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:09:47,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:09:47,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:09:48,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:09:48,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:09:48,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-26 23:09:48,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:09:48,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 160 [2020-10-26 23:09:48,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:09:48,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:09:48,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:09:48,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-26 23:09:48,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:09:48,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-26 23:09:48,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:09:48,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:09:48,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:09:48,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-26 23:09:48,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:09:48,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-10-26 23:09:48,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:09:48,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:09:48,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-10-26 23:09:48,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:09:48,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:09:48,516 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 108 proven. 72 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 23:09:48,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2124345639] [2020-10-26 23:09:48,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:09:48,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:09:48,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397389781] [2020-10-26 23:09:48,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:09:48,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:09:48,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:09:48,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:09:48,519 INFO L87 Difference]: Start difference. First operand 7162 states and 9213 transitions. Second operand 7 states. [2020-10-26 23:10:20,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:10:20,099 INFO L93 Difference]: Finished difference Result 16407 states and 21425 transitions. [2020-10-26 23:10:20,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 23:10:20,102 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 232 [2020-10-26 23:10:20,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:10:20,155 INFO L225 Difference]: With dead ends: 16407 [2020-10-26 23:10:20,155 INFO L226 Difference]: Without dead ends: 10054 [2020-10-26 23:10:20,175 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-26 23:10:20,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10054 states. [2020-10-26 23:10:20,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10054 to 9816. [2020-10-26 23:10:20,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9816 states. [2020-10-26 23:10:20,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9816 states to 9816 states and 12221 transitions. [2020-10-26 23:10:20,530 INFO L78 Accepts]: Start accepts. Automaton has 9816 states and 12221 transitions. Word has length 232 [2020-10-26 23:10:20,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:10:20,531 INFO L481 AbstractCegarLoop]: Abstraction has 9816 states and 12221 transitions. [2020-10-26 23:10:20,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:10:20,532 INFO L276 IsEmpty]: Start isEmpty. Operand 9816 states and 12221 transitions. [2020-10-26 23:10:20,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-10-26 23:10:20,535 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:10:20,536 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-26 23:10:20,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 23:10:20,537 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:10:20,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:10:20,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1986587761, now seen corresponding path program 1 times [2020-10-26 23:10:20,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:10:20,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1175141638] [2020-10-26 23:10:20,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:10:20,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:10:20,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:10:20,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:10:21,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:10:22,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:10:22,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 253 [2020-10-26 23:10:22,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:10:22,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1471 [2020-10-26 23:10:22,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:10:22,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:10:22,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 110 [2020-10-26 23:10:22,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 139 [2020-10-26 23:10:22,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:10:22,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:10:22,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:10:22,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:10:22,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:10:22,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:10:22,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:10:22,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 23:10:22,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:10:22,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:10:22,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:10:22,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:10:22,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:10:22,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:10:22,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:10:22,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:10:22,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:10:22,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 23:10:22,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:10:22,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 97 [2020-10-26 23:10:22,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:10:22,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:10:22,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:10:22,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-26 23:10:22,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:10:22,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-26 23:10:22,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:10:22,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:10:22,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:10:22,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:10:22,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-26 23:10:22,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:10:22,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 193 [2020-10-26 23:10:22,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:10:22,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:10:22,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:10:22,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-26 23:10:22,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:10:22,925 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 126 proven. 54 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 23:10:22,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1175141638] [2020-10-26 23:10:22,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:10:22,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 23:10:22,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54165007] [2020-10-26 23:10:22,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 23:10:22,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:10:22,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 23:10:22,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 23:10:22,940 INFO L87 Difference]: Start difference. First operand 9816 states and 12221 transitions. Second operand 6 states. [2020-10-26 23:10:23,805 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-26 23:10:48,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:10:48,820 INFO L93 Difference]: Finished difference Result 19042 states and 24050 transitions. [2020-10-26 23:10:48,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 23:10:48,829 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 239 [2020-10-26 23:10:48,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:10:48,868 INFO L225 Difference]: With dead ends: 19042 [2020-10-26 23:10:48,868 INFO L226 Difference]: Without dead ends: 10035 [2020-10-26 23:10:48,892 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 23:10:48,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10035 states. [2020-10-26 23:10:49,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10035 to 9860. [2020-10-26 23:10:49,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9860 states. [2020-10-26 23:10:49,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9860 states to 9860 states and 12078 transitions. [2020-10-26 23:10:49,154 INFO L78 Accepts]: Start accepts. Automaton has 9860 states and 12078 transitions. Word has length 239 [2020-10-26 23:10:49,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:10:49,155 INFO L481 AbstractCegarLoop]: Abstraction has 9860 states and 12078 transitions. [2020-10-26 23:10:49,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 23:10:49,155 INFO L276 IsEmpty]: Start isEmpty. Operand 9860 states and 12078 transitions. [2020-10-26 23:10:49,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2020-10-26 23:10:49,169 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:10:49,169 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-26 23:10:49,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 23:10:49,170 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:10:49,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:10:49,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1139809367, now seen corresponding path program 1 times [2020-10-26 23:10:49,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:10:49,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [646635521] [2020-10-26 23:10:49,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:10:49,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:10:49,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:10:49,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:10:50,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:10:50,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:10:50,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 262 [2020-10-26 23:10:50,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:10:50,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1390 [2020-10-26 23:10:50,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:10:50,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:10:50,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 110 [2020-10-26 23:10:50,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 148 [2020-10-26 23:10:50,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:10:50,894 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-26 23:10:50,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:10:50,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:10:50,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:10:50,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:10:50,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:10:50,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:10:50,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 23:10:50,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:10:50,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:10:50,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:10:50,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:10:50,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:10:50,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:10:50,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:10:50,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:10:51,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:10:51,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 23:10:51,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:10:51,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 95 [2020-10-26 23:10:51,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:10:51,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:10:51,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:10:51,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-26 23:10:51,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:10:51,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-26 23:10:51,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:10:51,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:10:51,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:10:51,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:10:51,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-26 23:10:51,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:10:51,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 172 [2020-10-26 23:10:51,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:10:51,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:10:51,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:10:51,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-26 23:10:51,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:10:51,549 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 135 proven. 54 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 23:10:51,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [646635521] [2020-10-26 23:10:51,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:10:51,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 23:10:51,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693190605] [2020-10-26 23:10:51,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 23:10:51,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:10:51,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 23:10:51,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 23:10:51,553 INFO L87 Difference]: Start difference. First operand 9860 states and 12078 transitions. Second operand 6 states. [2020-10-26 23:10:52,410 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-26 23:11:33,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:11:33,255 INFO L93 Difference]: Finished difference Result 25071 states and 31900 transitions. [2020-10-26 23:11:33,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 23:11:33,261 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 248 [2020-10-26 23:11:33,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:11:33,318 INFO L225 Difference]: With dead ends: 25071 [2020-10-26 23:11:33,318 INFO L226 Difference]: Without dead ends: 16031 [2020-10-26 23:11:33,344 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 23:11:33,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16031 states. [2020-10-26 23:11:33,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16031 to 15870. [2020-10-26 23:11:33,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15870 states. [2020-10-26 23:11:33,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15870 states to 15870 states and 19440 transitions. [2020-10-26 23:11:33,730 INFO L78 Accepts]: Start accepts. Automaton has 15870 states and 19440 transitions. Word has length 248 [2020-10-26 23:11:33,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:11:33,731 INFO L481 AbstractCegarLoop]: Abstraction has 15870 states and 19440 transitions. [2020-10-26 23:11:33,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 23:11:33,731 INFO L276 IsEmpty]: Start isEmpty. Operand 15870 states and 19440 transitions. [2020-10-26 23:11:33,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2020-10-26 23:11:33,736 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:11:33,737 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-26 23:11:33,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 23:11:33,737 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:11:33,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:11:33,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1681353211, now seen corresponding path program 1 times [2020-10-26 23:11:33,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:11:33,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [19834931] [2020-10-26 23:11:33,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:11:33,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:11:33,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:11:34,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:11:35,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:11:35,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:11:35,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 291 [2020-10-26 23:11:35,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:11:35,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1899 [2020-10-26 23:11:35,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:11:35,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:11:35,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 110 [2020-10-26 23:11:35,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 118 [2020-10-26 23:11:35,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:11:35,895 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-26 23:11:35,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:11:35,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:11:35,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:11:35,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:11:35,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:11:35,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:11:35,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 23:11:35,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:11:35,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:11:35,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:11:35,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:11:35,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:11:35,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:11:35,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:11:35,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:11:36,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:11:36,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 23:11:36,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:11:36,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 97 [2020-10-26 23:11:36,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:11:36,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:11:36,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:11:36,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-26 23:11:36,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:11:36,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-26 23:11:36,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:11:36,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:11:36,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:11:36,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-26 23:11:36,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:11:36,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 215 [2020-10-26 23:11:36,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:11:36,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:11:36,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:11:36,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-26 23:11:36,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:11:36,700 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 205 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 23:11:36,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [19834931] [2020-10-26 23:11:36,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:11:36,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:11:36,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024375298] [2020-10-26 23:11:36,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:11:36,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:11:36,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:11:36,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:11:36,703 INFO L87 Difference]: Start difference. First operand 15870 states and 19440 transitions. Second operand 7 states. [2020-10-26 23:11:36,880 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-26 23:11:41,375 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 66