/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/Problem13_label43.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 18:04:53,468 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 18:04:53,472 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 18:04:53,516 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 18:04:53,517 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 18:04:53,519 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 18:04:53,521 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 18:04:53,524 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 18:04:53,527 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 18:04:53,529 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 18:04:53,530 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 18:04:53,532 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 18:04:53,533 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 18:04:53,536 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 18:04:53,538 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 18:04:53,540 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 18:04:53,541 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 18:04:53,542 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 18:04:53,545 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 18:04:53,547 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 18:04:53,549 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 18:04:53,552 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 18:04:53,558 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 18:04:53,560 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 18:04:53,584 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 18:04:53,585 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 18:04:53,585 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 18:04:53,587 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 18:04:53,590 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 18:04:53,591 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 18:04:53,592 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 18:04:53,593 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 18:04:53,594 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 18:04:53,596 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 18:04:53,599 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 18:04:53,599 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 18:04:53,600 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 18:04:53,600 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 18:04:53,600 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 18:04:53,602 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 18:04:53,604 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 18:04:53,605 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 18:04:53,672 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 18:04:53,673 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 18:04:53,680 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 18:04:53,680 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 18:04:53,681 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 18:04:53,681 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 18:04:53,682 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 18:04:53,682 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 18:04:53,683 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 18:04:53,683 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 18:04:53,684 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 18:04:53,684 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 18:04:53,685 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 18:04:53,685 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 18:04:53,685 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 18:04:53,685 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 18:04:53,686 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 18:04:53,686 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 18:04:53,687 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 18:04:53,687 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 18:04:53,687 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 18:04:53,687 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 18:04:53,688 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 18:04:53,688 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 18:04:53,688 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 18:04:53,688 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 18:04:53,688 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 18:04:53,689 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 18:04:53,689 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 18:04:53,689 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 18:04:54,185 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 18:04:54,237 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 18:04:54,241 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 18:04:54,244 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 18:04:54,245 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 18:04:54,246 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label43.c [2020-10-27 18:04:54,346 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8412848d8/b1c108bcf7c44469b0be5eaac13de30c/FLAG9a181ebf8 [2020-10-27 18:04:55,503 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 18:04:55,504 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem13_label43.c [2020-10-27 18:04:55,552 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8412848d8/b1c108bcf7c44469b0be5eaac13de30c/FLAG9a181ebf8 [2020-10-27 18:04:55,950 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8412848d8/b1c108bcf7c44469b0be5eaac13de30c [2020-10-27 18:04:55,956 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 18:04:55,965 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 18:04:55,970 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 18:04:55,970 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 18:04:55,975 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 18:04:55,976 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:04:55" (1/1) ... [2020-10-27 18:04:55,982 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2be277ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:04:55, skipping insertion in model container [2020-10-27 18:04:55,983 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:04:55" (1/1) ... [2020-10-27 18:04:55,992 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 18:04:56,221 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 18:04:57,990 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 18:04:58,010 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 18:04:58,928 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 18:04:58,977 INFO L208 MainTranslator]: Completed translation [2020-10-27 18:04:58,979 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:04:58 WrapperNode [2020-10-27 18:04:58,979 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 18:04:58,981 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 18:04:58,981 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 18:04:58,981 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 18:04:59,001 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:04:58" (1/1) ... [2020-10-27 18:04:59,004 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:04:58" (1/1) ... [2020-10-27 18:04:59,100 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:04:58" (1/1) ... [2020-10-27 18:04:59,101 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:04:58" (1/1) ... [2020-10-27 18:04:59,288 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:04:58" (1/1) ... [2020-10-27 18:04:59,338 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:04:58" (1/1) ... [2020-10-27 18:04:59,417 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:04:58" (1/1) ... [2020-10-27 18:04:59,490 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 18:04:59,493 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 18:04:59,493 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 18:04:59,493 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 18:04:59,494 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:04:58" (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 18:04:59,602 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 18:04:59,602 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 18:04:59,603 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 18:04:59,603 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 18:04:59,604 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 18:04:59,604 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-27 18:04:59,604 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-27 18:04:59,604 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 18:04:59,604 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 18:04:59,604 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 18:04:59,605 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-27 18:04:59,605 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-27 18:04:59,676 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 18:04:59,676 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 18:04:59,677 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 18:04:59,679 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 18:04:59,679 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 18:04:59,680 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 18:04:59,680 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 18:04:59,680 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 18:04:59,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 18:04:59,680 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 18:04:59,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 18:04:59,681 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 18:04:59,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 18:05:13,588 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 18:05:13,589 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 18:05:13,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:05:13 BoogieIcfgContainer [2020-10-27 18:05:13,597 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 18:05:13,599 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 18:05:13,599 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 18:05:13,606 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 18:05:13,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 06:04:55" (1/3) ... [2020-10-27 18:05:13,609 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c368ae6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:05:13, skipping insertion in model container [2020-10-27 18:05:13,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:04:58" (2/3) ... [2020-10-27 18:05:13,609 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c368ae6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:05:13, skipping insertion in model container [2020-10-27 18:05:13,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:05:13" (3/3) ... [2020-10-27 18:05:13,613 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label43.c [2020-10-27 18:05:13,629 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 18:05:13,638 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 18:05:13,655 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 18:05:13,709 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 18:05:13,709 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 18:05:13,709 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 18:05:13,709 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 18:05:13,710 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 18:05:13,710 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 18:05:13,710 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 18:05:13,710 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 18:05:13,768 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states. [2020-10-27 18:05:13,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 18:05:13,775 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:05:13,776 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 18:05:13,780 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:05:13,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:05:13,787 INFO L82 PathProgramCache]: Analyzing trace with hash -712398662, now seen corresponding path program 1 times [2020-10-27 18:05:13,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:05:13,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1520033370] [2020-10-27 18:05:13,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:05:13,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:05:14,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:05:14,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:05:14,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 18:05:14,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:05:14,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 651 [2020-10-27 18:05:14,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:05:14,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 18:05:14,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 18:05:14,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 18:05:14,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 18:05:14,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:05:14,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:05:14,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:05:14,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:05:14,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:05:14,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:05:14,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-10-27 18:05:14,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:05:14,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:05:14,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:05:14,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 18:05:14,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 18:05:14,999 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 18:05:15,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1520033370] [2020-10-27 18:05:15,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 18:05:15,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 18:05:15,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274723404] [2020-10-27 18:05:15,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 18:05:15,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:05:15,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 18:05:15,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 18:05:15,044 INFO L87 Difference]: Start difference. First operand 1123 states. Second operand 4 states. [2020-10-27 18:05:37,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:05:37,416 INFO L93 Difference]: Finished difference Result 3247 states and 5953 transitions. [2020-10-27 18:05:37,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:05:37,420 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-27 18:05:37,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:05:37,458 INFO L225 Difference]: With dead ends: 3247 [2020-10-27 18:05:37,458 INFO L226 Difference]: Without dead ends: 2045 [2020-10-27 18:05:37,471 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:05:37,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2045 states. [2020-10-27 18:05:37,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2045 to 1988. [2020-10-27 18:05:37,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1988 states. [2020-10-27 18:05:37,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1988 states to 1988 states and 3533 transitions. [2020-10-27 18:05:37,722 INFO L78 Accepts]: Start accepts. Automaton has 1988 states and 3533 transitions. Word has length 25 [2020-10-27 18:05:37,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:05:37,724 INFO L481 AbstractCegarLoop]: Abstraction has 1988 states and 3533 transitions. [2020-10-27 18:05:37,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 18:05:37,725 INFO L276 IsEmpty]: Start isEmpty. Operand 1988 states and 3533 transitions. [2020-10-27 18:05:37,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-27 18:05:37,733 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:05:37,734 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] [2020-10-27 18:05:37,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 18:05:37,735 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:05:37,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:05:37,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1852529461, now seen corresponding path program 1 times [2020-10-27 18:05:37,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:05:37,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [709695880] [2020-10-27 18:05:37,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:05:37,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:05:37,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:05:38,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:05:38,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:05:39,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:05:39,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-27 18:05:39,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:05:39,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1654 [2020-10-27 18:05:39,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:05:39,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:05:39,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-10-27 18:05:39,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 18:05:39,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 18:05:39,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:05:39,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:05:39,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:05:39,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:05:39,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:05:39,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:05:39,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 18:05:39,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:05:39,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:05:39,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:05:39,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:05:39,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-27 18:05:39,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:05:39,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:05:39,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:05:39,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:05:39,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 18:05:39,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:05:39,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 95 [2020-10-27 18:05:39,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:05:39,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:05:39,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:05:39,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 18:05:39,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:05:39,987 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 18:05:39,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [709695880] [2020-10-27 18:05:39,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:05:39,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 18:05:39,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163186534] [2020-10-27 18:05:39,991 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 18:05:39,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:05:39,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 18:05:39,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:05:39,994 INFO L87 Difference]: Start difference. First operand 1988 states and 3533 transitions. Second operand 6 states. [2020-10-27 18:05:40,572 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-10-27 18:05:56,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:05:56,969 INFO L93 Difference]: Finished difference Result 3991 states and 7089 transitions. [2020-10-27 18:05:56,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:05:56,973 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 94 [2020-10-27 18:05:56,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:05:56,989 INFO L225 Difference]: With dead ends: 3991 [2020-10-27 18:05:56,989 INFO L226 Difference]: Without dead ends: 1992 [2020-10-27 18:05:56,996 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 18:05:57,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1992 states. [2020-10-27 18:05:57,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1992 to 1988. [2020-10-27 18:05:57,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1988 states. [2020-10-27 18:05:57,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1988 states to 1988 states and 3531 transitions. [2020-10-27 18:05:57,088 INFO L78 Accepts]: Start accepts. Automaton has 1988 states and 3531 transitions. Word has length 94 [2020-10-27 18:05:57,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:05:57,088 INFO L481 AbstractCegarLoop]: Abstraction has 1988 states and 3531 transitions. [2020-10-27 18:05:57,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 18:05:57,089 INFO L276 IsEmpty]: Start isEmpty. Operand 1988 states and 3531 transitions. [2020-10-27 18:05:57,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-27 18:05:57,091 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:05:57,091 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] [2020-10-27 18:05:57,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 18:05:57,092 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:05:57,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:05:57,093 INFO L82 PathProgramCache]: Analyzing trace with hash -807974319, now seen corresponding path program 1 times [2020-10-27 18:05:57,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:05:57,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1641477765] [2020-10-27 18:05:57,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:05:57,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:05:57,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:05:57,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:05:57,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:05:58,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:05:58,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-27 18:05:58,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:05:58,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 953 [2020-10-27 18:05:58,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:05:58,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:05:58,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 82 [2020-10-27 18:05:58,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 18:05:58,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:05:58,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:05:58,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:05:58,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:05:58,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:05:58,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:05:58,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:05:58,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 18:05:58,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:05:58,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:05:58,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:05:58,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:05:58,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:05:58,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:05:58,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:05:58,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:05:58,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:05:58,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 18:05:58,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:05:58,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 109 [2020-10-27 18:05:58,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:05:58,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:05:58,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:05:58,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-27 18:05:58,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:05:58,450 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 18:05:58,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1641477765] [2020-10-27 18:05:58,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:05:58,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:05:58,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437084530] [2020-10-27 18:05:58,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:05:58,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:05:58,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:05:58,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:05:58,454 INFO L87 Difference]: Start difference. First operand 1988 states and 3531 transitions. Second operand 5 states. [2020-10-27 18:06:18,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:06:18,429 INFO L93 Difference]: Finished difference Result 5656 states and 10225 transitions. [2020-10-27 18:06:18,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:06:18,431 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 97 [2020-10-27 18:06:18,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:06:18,451 INFO L225 Difference]: With dead ends: 5656 [2020-10-27 18:06:18,451 INFO L226 Difference]: Without dead ends: 3674 [2020-10-27 18:06:18,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 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 18:06:18,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3674 states. [2020-10-27 18:06:18,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3674 to 3649. [2020-10-27 18:06:18,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3649 states. [2020-10-27 18:06:18,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3649 states to 3649 states and 5563 transitions. [2020-10-27 18:06:18,575 INFO L78 Accepts]: Start accepts. Automaton has 3649 states and 5563 transitions. Word has length 97 [2020-10-27 18:06:18,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:06:18,575 INFO L481 AbstractCegarLoop]: Abstraction has 3649 states and 5563 transitions. [2020-10-27 18:06:18,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:06:18,576 INFO L276 IsEmpty]: Start isEmpty. Operand 3649 states and 5563 transitions. [2020-10-27 18:06:18,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-27 18:06:18,578 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:06:18,578 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] [2020-10-27 18:06:18,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 18:06:18,579 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:06:18,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:06:18,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1166855360, now seen corresponding path program 1 times [2020-10-27 18:06:18,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:06:18,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1870288418] [2020-10-27 18:06:18,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:06:18,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:06:18,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:06:18,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:06:19,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:06:19,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:06:19,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-27 18:06:19,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:06:19,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1185 [2020-10-27 18:06:19,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:06:19,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:06:19,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 86 [2020-10-27 18:06:19,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 18:06:19,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:06:19,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:06:19,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:06:19,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:06:19,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:06:19,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:06:19,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:06:19,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 18:06:19,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:06:19,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:06:19,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:06:19,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:06:19,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:06:19,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:06:19,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:06:20,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:06:20,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:06:20,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 18:06:20,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:06:20,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 98 [2020-10-27 18:06:20,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:06:20,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:06:20,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:06:20,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-27 18:06:20,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 18:06:20,155 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 18:06:20,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1870288418] [2020-10-27 18:06:20,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:06:20,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:06:20,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021004614] [2020-10-27 18:06:20,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:06:20,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:06:20,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:06:20,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:06:20,165 INFO L87 Difference]: Start difference. First operand 3649 states and 5563 transitions. Second operand 5 states. [2020-10-27 18:06:42,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:06:42,321 INFO L93 Difference]: Finished difference Result 8949 states and 14288 transitions. [2020-10-27 18:06:42,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:06:42,324 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 101 [2020-10-27 18:06:42,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:06:42,355 INFO L225 Difference]: With dead ends: 8949 [2020-10-27 18:06:42,355 INFO L226 Difference]: Without dead ends: 5306 [2020-10-27 18:06:42,366 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 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 18:06:42,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5306 states. [2020-10-27 18:06:42,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5306 to 5297. [2020-10-27 18:06:42,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5297 states. [2020-10-27 18:06:42,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5297 states to 5297 states and 7619 transitions. [2020-10-27 18:06:42,532 INFO L78 Accepts]: Start accepts. Automaton has 5297 states and 7619 transitions. Word has length 101 [2020-10-27 18:06:42,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:06:42,533 INFO L481 AbstractCegarLoop]: Abstraction has 5297 states and 7619 transitions. [2020-10-27 18:06:42,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:06:42,533 INFO L276 IsEmpty]: Start isEmpty. Operand 5297 states and 7619 transitions. [2020-10-27 18:06:42,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-27 18:06:42,541 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:06:42,541 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, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:06:42,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 18:06:42,542 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:06:42,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:06:42,542 INFO L82 PathProgramCache]: Analyzing trace with hash -2094545038, now seen corresponding path program 1 times [2020-10-27 18:06:42,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:06:42,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [755337416] [2020-10-27 18:06:42,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:06:42,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:06:42,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:06:42,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:06:43,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:06:44,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:06:44,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 157 [2020-10-27 18:06:44,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:06:44,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2158 [2020-10-27 18:06:44,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:06:44,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:06:44,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 129 [2020-10-27 18:06:44,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 18:06:44,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:06:44,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:06:44,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:06:44,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:06:44,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:06:44,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:06:44,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:06:44,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 18:06:44,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:06:44,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:06:44,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:06:44,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:06:44,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:06:44,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:06:44,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:06:44,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:06:45,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:06:45,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-27 18:06:45,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:06:45,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 152 [2020-10-27 18:06:45,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:06:45,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:06:45,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:06:45,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-27 18:06:45,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:06:45,193 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 18:06:45,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [755337416] [2020-10-27 18:06:45,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:06:45,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:06:45,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866532466] [2020-10-27 18:06:45,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:06:45,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:06:45,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:06:45,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:06:45,196 INFO L87 Difference]: Start difference. First operand 5297 states and 7619 transitions. Second operand 5 states. [2020-10-27 18:07:12,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:07:12,550 INFO L93 Difference]: Finished difference Result 15638 states and 22924 transitions. [2020-10-27 18:07:12,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:07:12,553 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 145 [2020-10-27 18:07:12,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:07:12,603 INFO L225 Difference]: With dead ends: 15638 [2020-10-27 18:07:12,603 INFO L226 Difference]: Without dead ends: 10347 [2020-10-27 18:07:12,622 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 18:07:12,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10347 states. [2020-10-27 18:07:12,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10347 to 10323. [2020-10-27 18:07:12,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10323 states. [2020-10-27 18:07:12,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10323 states to 10323 states and 14216 transitions. [2020-10-27 18:07:13,000 INFO L78 Accepts]: Start accepts. Automaton has 10323 states and 14216 transitions. Word has length 145 [2020-10-27 18:07:13,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:07:13,002 INFO L481 AbstractCegarLoop]: Abstraction has 10323 states and 14216 transitions. [2020-10-27 18:07:13,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:07:13,002 INFO L276 IsEmpty]: Start isEmpty. Operand 10323 states and 14216 transitions. [2020-10-27 18:07:13,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-10-27 18:07:13,007 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:07:13,008 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] [2020-10-27 18:07:13,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 18:07:13,008 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:07:13,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:07:13,009 INFO L82 PathProgramCache]: Analyzing trace with hash -758112490, now seen corresponding path program 1 times [2020-10-27 18:07:13,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:07:13,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [531452871] [2020-10-27 18:07:13,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:07:13,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:07:13,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:07:13,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:07:13,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:07:14,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:07:17,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:07:17,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 207 [2020-10-27 18:07:17,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 18:07:17,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4217 [2020-10-27 18:07:17,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:07:17,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:07:17,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 180 [2020-10-27 18:07:17,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 18:07:17,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:07:17,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:07:17,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:07:17,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:07:17,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:07:17,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:07:17,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:07:17,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 18:07:17,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:07:17,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:07:17,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:07:17,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:07:17,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:07:17,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:07:17,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:07:17,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:07:17,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:07:17,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-27 18:07:17,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:07:17,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-27 18:07:17,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:07:17,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:07:17,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:07:17,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:07:17,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:07:17,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-27 18:07:17,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:07:17,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:07:17,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:07:17,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 18:07:17,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:07:17,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 103 [2020-10-27 18:07:17,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:07:17,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:07:17,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:07:17,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 18:07:17,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:07:17,788 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 18:07:17,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [531452871] [2020-10-27 18:07:17,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:07:17,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:07:17,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183517312] [2020-10-27 18:07:17,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:07:17,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:07:17,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:07:17,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:07:17,793 INFO L87 Difference]: Start difference. First operand 10323 states and 14216 transitions. Second operand 5 states. [2020-10-27 18:07:17,948 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 18:07:48,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:07:48,876 INFO L93 Difference]: Finished difference Result 25708 states and 35809 transitions. [2020-10-27 18:07:48,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:07:48,880 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 193 [2020-10-27 18:07:48,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:07:48,943 INFO L225 Difference]: With dead ends: 25708 [2020-10-27 18:07:48,943 INFO L226 Difference]: Without dead ends: 15391 [2020-10-27 18:07:49,051 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 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 18:07:49,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15391 states. [2020-10-27 18:07:49,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15391 to 15295. [2020-10-27 18:07:49,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15295 states. [2020-10-27 18:07:49,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15295 states to 15295 states and 21182 transitions. [2020-10-27 18:07:49,555 INFO L78 Accepts]: Start accepts. Automaton has 15295 states and 21182 transitions. Word has length 193 [2020-10-27 18:07:49,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:07:49,556 INFO L481 AbstractCegarLoop]: Abstraction has 15295 states and 21182 transitions. [2020-10-27 18:07:49,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:07:49,556 INFO L276 IsEmpty]: Start isEmpty. Operand 15295 states and 21182 transitions. [2020-10-27 18:07:49,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2020-10-27 18:07:49,564 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:07:49,564 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, 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 18:07:49,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 18:07:49,565 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:07:49,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:07:49,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1217501006, now seen corresponding path program 1 times [2020-10-27 18:07:49,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:07:49,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [377261880] [2020-10-27 18:07:49,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:07:49,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:07:49,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:07:49,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:07:51,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:07:51,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:07:54,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:07:54,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 231 [2020-10-27 18:07:54,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 18:07:54,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 18:07:54,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:07:54,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:07:54,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 204 [2020-10-27 18:07:54,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 18:07:54,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:07:54,850 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 18:07:54,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:07:54,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:07:54,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:07:54,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:07:54,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:07:54,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:07:54,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 18:07:54,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:07:54,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:07:54,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:07:54,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:07:54,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:07:54,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:07:54,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:07:54,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:07:54,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:07:54,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 18:07:54,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:07:54,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-27 18:07:54,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:07:54,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:07:54,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:07:54,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:07:54,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:07:54,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-10-27 18:07:55,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:07:55,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:07:55,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:07:55,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-27 18:07:55,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:07:55,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 110 [2020-10-27 18:07:55,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:07:55,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:07:55,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:07:55,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-27 18:07:55,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:07:55,299 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2020-10-27 18:07:55,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [377261880] [2020-10-27 18:07:55,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:07:55,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:07:55,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443183622] [2020-10-27 18:07:55,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:07:55,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:07:55,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:07:55,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:07:55,304 INFO L87 Difference]: Start difference. First operand 15295 states and 21182 transitions. Second operand 5 states. [2020-10-27 18:07:56,420 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 18:08:34,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:08:34,772 INFO L93 Difference]: Finished difference Result 35509 states and 51520 transitions. [2020-10-27 18:08:34,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:08:34,777 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 217 [2020-10-27 18:08:34,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:08:34,877 INFO L225 Difference]: With dead ends: 35509 [2020-10-27 18:08:34,877 INFO L226 Difference]: Without dead ends: 20220 [2020-10-27 18:08:34,928 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 18:08:34,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20220 states. [2020-10-27 18:08:35,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20220 to 20176. [2020-10-27 18:08:35,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20176 states. [2020-10-27 18:08:35,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20176 states to 20176 states and 27494 transitions. [2020-10-27 18:08:35,710 INFO L78 Accepts]: Start accepts. Automaton has 20176 states and 27494 transitions. Word has length 217 [2020-10-27 18:08:35,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:08:35,712 INFO L481 AbstractCegarLoop]: Abstraction has 20176 states and 27494 transitions. [2020-10-27 18:08:35,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:08:35,712 INFO L276 IsEmpty]: Start isEmpty. Operand 20176 states and 27494 transitions. [2020-10-27 18:08:35,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2020-10-27 18:08:35,720 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:08:35,720 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:08:35,721 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 18:08:35,721 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:08:35,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:08:35,722 INFO L82 PathProgramCache]: Analyzing trace with hash 373287792, now seen corresponding path program 1 times [2020-10-27 18:08:35,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:08:35,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1046677600] [2020-10-27 18:08:35,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:08:35,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:08:35,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:08:36,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:08:37,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:08:37,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 230 [2020-10-27 18:08:37,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:08:37,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2139 [2020-10-27 18:08:37,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:08:37,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:08:37,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 203 [2020-10-27 18:08:37,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 18:08:37,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:08:38,193 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 18:08:38,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:08:38,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:08:38,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:08:38,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:08:38,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:08:38,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:08:38,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 18:08:38,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:08:38,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:08:38,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:08:38,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:08:38,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:08:38,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:08:38,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:08:38,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:08:38,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:08:38,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 194 [2020-10-27 18:08:38,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:08:38,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 289 [2020-10-27 18:08:38,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:08:38,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:08:38,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:08:38,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 188 [2020-10-27 18:08:38,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:08:38,791 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 18:08:38,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1046677600] [2020-10-27 18:08:38,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:08:38,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:08:38,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229979703] [2020-10-27 18:08:38,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:08:38,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:08:38,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:08:38,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:08:38,796 INFO L87 Difference]: Start difference. First operand 20176 states and 27494 transitions. Second operand 5 states. [2020-10-27 18:08:39,005 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 66