/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/Problem06_label09.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 16:25:17,706 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 16:25:17,711 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 16:25:17,772 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 16:25:17,773 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 16:25:17,780 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 16:25:17,782 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 16:25:17,788 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 16:25:17,792 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 16:25:17,798 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 16:25:17,800 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 16:25:17,801 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 16:25:17,802 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 16:25:17,805 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 16:25:17,808 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 16:25:17,810 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 16:25:17,811 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 16:25:17,814 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 16:25:17,823 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 16:25:17,832 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 16:25:17,834 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 16:25:17,836 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 16:25:17,837 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 16:25:17,840 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 16:25:17,850 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 16:25:17,850 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 16:25:17,850 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 16:25:17,853 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 16:25:17,854 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 16:25:17,855 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 16:25:17,855 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 16:25:17,856 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 16:25:17,859 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 16:25:17,859 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 16:25:17,861 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 16:25:17,861 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 16:25:17,862 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 16:25:17,862 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 16:25:17,862 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 16:25:17,863 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 16:25:17,864 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 16:25:17,872 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 16:25:17,921 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 16:25:17,922 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 16:25:17,926 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 16:25:17,927 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 16:25:17,927 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 16:25:17,927 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 16:25:17,927 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 16:25:17,928 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 16:25:17,928 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 16:25:17,928 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 16:25:17,929 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 16:25:17,929 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 16:25:17,929 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 16:25:17,930 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 16:25:17,930 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 16:25:17,930 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 16:25:17,930 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 16:25:17,930 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 16:25:17,931 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 16:25:17,931 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 16:25:17,931 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 16:25:17,931 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 16:25:17,931 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 16:25:17,932 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 16:25:17,932 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 16:25:17,932 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 16:25:17,932 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 16:25:17,932 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 16:25:17,932 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 16:25:17,933 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 16:25:18,374 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 16:25:18,403 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 16:25:18,406 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 16:25:18,408 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 16:25:18,408 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 16:25:18,410 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem06_label09.c [2020-10-27 16:25:18,482 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/12c167746/1d383f568c134cd0b350e0c7d08c692b/FLAGc64eb68f3 [2020-10-27 16:25:19,793 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 16:25:19,794 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem06_label09.c [2020-10-27 16:25:19,852 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/12c167746/1d383f568c134cd0b350e0c7d08c692b/FLAGc64eb68f3 [2020-10-27 16:25:19,996 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/12c167746/1d383f568c134cd0b350e0c7d08c692b [2020-10-27 16:25:19,999 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 16:25:20,006 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 16:25:20,008 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 16:25:20,008 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 16:25:20,013 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 16:25:20,014 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 04:25:19" (1/1) ... [2020-10-27 16:25:20,017 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fbb9511 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:25:20, skipping insertion in model container [2020-10-27 16:25:20,018 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 04:25:19" (1/1) ... [2020-10-27 16:25:20,026 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 16:25:20,216 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 16:25:22,563 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 16:25:22,580 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 16:25:23,795 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 16:25:23,859 INFO L208 MainTranslator]: Completed translation [2020-10-27 16:25:23,860 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:25:23 WrapperNode [2020-10-27 16:25:23,860 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 16:25:23,862 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 16:25:23,862 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 16:25:23,862 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 16:25:23,877 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:25:23" (1/1) ... [2020-10-27 16:25:23,879 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:25:23" (1/1) ... [2020-10-27 16:25:24,013 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:25:23" (1/1) ... [2020-10-27 16:25:24,013 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:25:23" (1/1) ... [2020-10-27 16:25:24,184 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:25:23" (1/1) ... [2020-10-27 16:25:24,219 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:25:23" (1/1) ... [2020-10-27 16:25:24,259 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:25:23" (1/1) ... [2020-10-27 16:25:24,404 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 16:25:24,405 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 16:25:24,405 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 16:25:24,406 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 16:25:24,407 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:25:23" (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 16:25:24,488 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 16:25:24,489 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 16:25:24,489 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 16:25:24,489 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 16:25:24,489 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 16:25:24,489 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-27 16:25:24,490 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-27 16:25:24,490 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-27 16:25:24,490 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 16:25:24,490 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 16:25:24,490 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 16:25:24,490 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-27 16:25:24,491 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-27 16:25:24,491 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-27 16:25:24,491 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 16:25:24,491 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 16:25:24,491 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 16:25:24,491 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 16:25:24,492 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 16:25:24,492 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 16:25:24,492 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 16:25:24,492 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 16:25:24,492 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 16:25:24,492 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 16:25:24,492 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 16:25:24,492 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 16:25:24,493 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 16:25:32,890 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 16:25:32,890 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 16:25:32,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 04:25:32 BoogieIcfgContainer [2020-10-27 16:25:32,897 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 16:25:32,900 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 16:25:32,900 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 16:25:32,903 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 16:25:32,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 04:25:19" (1/3) ... [2020-10-27 16:25:32,905 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d393838 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 04:25:32, skipping insertion in model container [2020-10-27 16:25:32,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:25:23" (2/3) ... [2020-10-27 16:25:32,906 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d393838 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 04:25:32, skipping insertion in model container [2020-10-27 16:25:32,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 04:25:32" (3/3) ... [2020-10-27 16:25:32,907 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem06_label09.c [2020-10-27 16:25:32,918 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 16:25:32,923 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 16:25:32,936 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 16:25:32,970 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 16:25:32,970 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 16:25:32,970 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 16:25:32,970 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 16:25:32,970 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 16:25:32,971 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 16:25:32,971 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 16:25:32,971 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 16:25:33,011 INFO L276 IsEmpty]: Start isEmpty. Operand 1319 states. [2020-10-27 16:25:33,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 965 [2020-10-27 16:25:33,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:25:33,080 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:25:33,081 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:25:33,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:25:33,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1801049432, now seen corresponding path program 1 times [2020-10-27 16:25:33,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:25:33,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [564319701] [2020-10-27 16:25:33,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:25:34,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:25:34,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:25:37,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:25:39,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:25:39,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 982 [2020-10-27 16:25:39,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 16:25:39,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5176 [2020-10-27 16:25:39,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:25:39,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 16:25:39,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 16:25:39,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 973 [2020-10-27 16:25:39,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 16:25:41,377 WARN L193 SmtUtils]: Spent 447.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 16:25:41,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:25:41,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:25:41,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:25:41,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:25:41,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:25:41,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:25:41,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-27 16:25:41,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:25:41,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:25:41,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:25:41,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 16:25:41,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 16:25:42,659 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 16:25:42,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [564319701] [2020-10-27 16:25:42,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 16:25:42,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 16:25:42,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896085352] [2020-10-27 16:25:42,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 16:25:42,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:25:42,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 16:25:42,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 16:25:42,692 INFO L87 Difference]: Start difference. First operand 1319 states. Second operand 4 states. [2020-10-27 16:25:43,090 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-27 16:25:59,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:25:59,884 INFO L93 Difference]: Finished difference Result 3764 states and 7025 transitions. [2020-10-27 16:25:59,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 16:25:59,886 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 964 [2020-10-27 16:25:59,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:25:59,932 INFO L225 Difference]: With dead ends: 3764 [2020-10-27 16:25:59,932 INFO L226 Difference]: Without dead ends: 2381 [2020-10-27 16:25:59,947 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 16:25:59,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2381 states. [2020-10-27 16:26:00,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2381 to 2338. [2020-10-27 16:26:00,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2338 states. [2020-10-27 16:26:00,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2338 states to 2338 states and 3805 transitions. [2020-10-27 16:26:00,146 INFO L78 Accepts]: Start accepts. Automaton has 2338 states and 3805 transitions. Word has length 964 [2020-10-27 16:26:00,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:26:00,150 INFO L481 AbstractCegarLoop]: Abstraction has 2338 states and 3805 transitions. [2020-10-27 16:26:00,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 16:26:00,150 INFO L276 IsEmpty]: Start isEmpty. Operand 2338 states and 3805 transitions. [2020-10-27 16:26:00,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 973 [2020-10-27 16:26:00,189 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:26:00,190 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:26:00,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 16:26:00,190 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:26:00,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:26:00,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1083977561, now seen corresponding path program 1 times [2020-10-27 16:26:00,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:26:00,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [322879598] [2020-10-27 16:26:00,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:26:00,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:26:00,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:26:02,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:26:05,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:26:05,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 992 [2020-10-27 16:26:05,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 16:26:05,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-27 16:26:05,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:26:05,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 16:26:05,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 16:26:05,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 970 [2020-10-27 16:26:05,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:26:06,564 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 16:26:06,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:26:06,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:26:06,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:26:06,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:26:06,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:26:06,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:26:06,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 16:26:06,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:26:06,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:26:06,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:26:06,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:26:06,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:26:06,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 16:26:06,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:26:06,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:26:06,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:26:06,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 16:26:06,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:26:06,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 16:26:06,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:26:06,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:26:06,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:26:06,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 16:26:06,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:26:07,825 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 16:26:07,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [322879598] [2020-10-27 16:26:07,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 16:26:07,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 16:26:07,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366986056] [2020-10-27 16:26:07,829 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 16:26:07,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:26:07,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 16:26:07,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 16:26:07,831 INFO L87 Difference]: Start difference. First operand 2338 states and 3805 transitions. Second operand 6 states. [2020-10-27 16:26:08,170 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-27 16:26:08,569 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-27 16:26:36,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:26:36,131 INFO L93 Difference]: Finished difference Result 6854 states and 11759 transitions. [2020-10-27 16:26:36,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 16:26:36,138 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 972 [2020-10-27 16:26:36,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:26:36,172 INFO L225 Difference]: With dead ends: 6854 [2020-10-27 16:26:36,172 INFO L226 Difference]: Without dead ends: 4522 [2020-10-27 16:26:36,180 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 16:26:36,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4522 states. [2020-10-27 16:26:36,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4522 to 4447. [2020-10-27 16:26:36,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4447 states. [2020-10-27 16:26:36,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4447 states to 4447 states and 6914 transitions. [2020-10-27 16:26:36,330 INFO L78 Accepts]: Start accepts. Automaton has 4447 states and 6914 transitions. Word has length 972 [2020-10-27 16:26:36,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:26:36,332 INFO L481 AbstractCegarLoop]: Abstraction has 4447 states and 6914 transitions. [2020-10-27 16:26:36,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 16:26:36,333 INFO L276 IsEmpty]: Start isEmpty. Operand 4447 states and 6914 transitions. [2020-10-27 16:26:36,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 982 [2020-10-27 16:26:36,352 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:26:36,353 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:26:36,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 16:26:36,353 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:26:36,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:26:36,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1112618846, now seen corresponding path program 1 times [2020-10-27 16:26:36,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:26:36,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [628713933] [2020-10-27 16:26:36,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:26:36,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:26:36,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:26:38,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:26:41,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:26:41,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1001 [2020-10-27 16:26:41,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 16:26:41,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-27 16:26:41,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:26:41,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 16:26:41,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-27 16:26:41,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 970 [2020-10-27 16:26:41,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:26:42,704 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 16:26:42,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:26:42,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:26:42,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:26:42,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:26:42,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:26:42,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:26:42,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 16:26:42,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:26:42,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:26:42,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:26:42,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:26:42,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:26:42,844 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-27 16:26:42,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 16:26:42,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:26:42,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:26:42,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:26:42,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 16:26:42,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:26:42,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-10-27 16:26:42,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:26:42,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:26:42,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:26:42,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 16:26:42,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:26:43,986 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 16:26:43,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [628713933] [2020-10-27 16:26:43,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 16:26:43,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 16:26:43,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201230877] [2020-10-27 16:26:43,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 16:26:43,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:26:43,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 16:26:43,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 16:26:43,990 INFO L87 Difference]: Start difference. First operand 4447 states and 6914 transitions. Second operand 5 states. [2020-10-27 16:26:44,457 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-27 16:27:05,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:27:05,342 INFO L93 Difference]: Finished difference Result 9962 states and 15905 transitions. [2020-10-27 16:27:05,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 16:27:05,343 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 981 [2020-10-27 16:27:05,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:27:05,375 INFO L225 Difference]: With dead ends: 9962 [2020-10-27 16:27:05,375 INFO L226 Difference]: Without dead ends: 5521 [2020-10-27 16:27:05,386 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 16:27:05,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5521 states. [2020-10-27 16:27:05,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5521 to 5486. [2020-10-27 16:27:05,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5486 states. [2020-10-27 16:27:05,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5486 states to 5486 states and 8409 transitions. [2020-10-27 16:27:05,551 INFO L78 Accepts]: Start accepts. Automaton has 5486 states and 8409 transitions. Word has length 981 [2020-10-27 16:27:05,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:27:05,554 INFO L481 AbstractCegarLoop]: Abstraction has 5486 states and 8409 transitions. [2020-10-27 16:27:05,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 16:27:05,554 INFO L276 IsEmpty]: Start isEmpty. Operand 5486 states and 8409 transitions. [2020-10-27 16:27:05,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 984 [2020-10-27 16:27:05,576 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:27:05,577 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:27:05,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 16:27:05,577 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:27:05,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:27:05,578 INFO L82 PathProgramCache]: Analyzing trace with hash 669652126, now seen corresponding path program 1 times [2020-10-27 16:27:05,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:27:05,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [998942749] [2020-10-27 16:27:05,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:27:05,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:27:05,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:27:07,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:27:11,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:27:11,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1003 [2020-10-27 16:27:11,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 16:27:11,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5255 [2020-10-27 16:27:11,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:27:11,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 16:27:11,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-27 16:27:11,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 970 [2020-10-27 16:27:11,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:27:12,272 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 16:27:12,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:27:12,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:27:12,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:27:12,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:27:12,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:27:12,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:27:12,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 16:27:12,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:27:12,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:27:12,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:27:12,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:27:12,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 16:27:12,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 16:27:12,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:27:12,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:27:12,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:27:12,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-27 16:27:12,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:27:12,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-27 16:27:12,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:27:12,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:27:12,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:27:12,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 16:27:12,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:27:13,533 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 16:27:13,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [998942749] [2020-10-27 16:27:13,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 16:27:13,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 16:27:13,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827200839] [2020-10-27 16:27:13,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 16:27:13,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:27:13,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 16:27:13,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 16:27:13,537 INFO L87 Difference]: Start difference. First operand 5486 states and 8409 transitions. Second operand 5 states. [2020-10-27 16:27:13,831 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-27 16:27:31,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:27:31,994 INFO L93 Difference]: Finished difference Result 16177 states and 25227 transitions. [2020-10-27 16:27:31,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 16:27:31,995 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 983 [2020-10-27 16:27:31,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:27:32,067 INFO L225 Difference]: With dead ends: 16177 [2020-10-27 16:27:32,067 INFO L226 Difference]: Without dead ends: 10697 [2020-10-27 16:27:32,086 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 16:27:32,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10697 states. [2020-10-27 16:27:32,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10697 to 10672. [2020-10-27 16:27:32,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10672 states. [2020-10-27 16:27:32,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10672 states to 10672 states and 15329 transitions. [2020-10-27 16:27:32,408 INFO L78 Accepts]: Start accepts. Automaton has 10672 states and 15329 transitions. Word has length 983 [2020-10-27 16:27:32,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:27:32,410 INFO L481 AbstractCegarLoop]: Abstraction has 10672 states and 15329 transitions. [2020-10-27 16:27:32,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 16:27:32,410 INFO L276 IsEmpty]: Start isEmpty. Operand 10672 states and 15329 transitions. [2020-10-27 16:27:32,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1011 [2020-10-27 16:27:32,453 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:27:32,454 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:27:32,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 16:27:32,455 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:27:32,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:27:32,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1119868897, now seen corresponding path program 1 times [2020-10-27 16:27:32,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:27:32,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [704273552] [2020-10-27 16:27:32,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:27:32,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:27:32,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:27:34,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:27:37,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:27:37,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1030 [2020-10-27 16:27:37,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 16:27:37,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-27 16:27:37,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:27:37,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 16:27:37,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 56 [2020-10-27 16:27:37,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 970 [2020-10-27 16:27:37,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:27:38,405 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 16:27:38,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:27:38,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:27:38,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:27:38,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:27:38,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:27:38,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:27:38,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 16:27:38,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:27:38,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:27:38,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:27:38,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:27:38,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:27:38,547 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-27 16:27:38,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 16:27:38,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:27:38,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:27:38,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:27:38,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 16:27:38,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:27:38,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-10-27 16:27:38,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:27:38,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:27:38,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:27:38,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 16:27:38,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:27:39,494 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 42 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 16:27:39,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [704273552] [2020-10-27 16:27:39,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 16:27:39,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 16:27:39,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796885035] [2020-10-27 16:27:39,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 16:27:39,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:27:39,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 16:27:39,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 16:27:39,496 INFO L87 Difference]: Start difference. First operand 10672 states and 15329 transitions. Second operand 5 states. [2020-10-27 16:27:39,789 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-27 16:27:57,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:27:57,884 INFO L93 Difference]: Finished difference Result 31640 states and 46776 transitions. [2020-10-27 16:27:57,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 16:27:57,892 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 1010 [2020-10-27 16:27:57,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:27:57,968 INFO L225 Difference]: With dead ends: 31640 [2020-10-27 16:27:57,968 INFO L226 Difference]: Without dead ends: 20974 [2020-10-27 16:27:58,000 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 16:27:58,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20974 states. [2020-10-27 16:27:58,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20974 to 20947. [2020-10-27 16:27:58,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20947 states. [2020-10-27 16:27:58,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20947 states to 20947 states and 29063 transitions. [2020-10-27 16:27:58,575 INFO L78 Accepts]: Start accepts. Automaton has 20947 states and 29063 transitions. Word has length 1010 [2020-10-27 16:27:58,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:27:58,575 INFO L481 AbstractCegarLoop]: Abstraction has 20947 states and 29063 transitions. [2020-10-27 16:27:58,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 16:27:58,576 INFO L276 IsEmpty]: Start isEmpty. Operand 20947 states and 29063 transitions. [2020-10-27 16:27:58,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1035 [2020-10-27 16:27:58,646 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:27:58,648 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:27:58,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 16:27:58,648 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:27:58,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:27:58,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1664891786, now seen corresponding path program 1 times [2020-10-27 16:27:58,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:27:58,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [546380258] [2020-10-27 16:27:58,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:27:58,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:27:58,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:27:58,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:28:04,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:28:04,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1058 [2020-10-27 16:28:04,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 16:28:04,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5291 [2020-10-27 16:28:04,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:28:04,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 16:28:04,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 16:28:04,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 16:28:04,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:28:04,558 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 16:28:04,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:28:04,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:28:04,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:28:04,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:28:04,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:28:04,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:28:04,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 16:28:04,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:28:04,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:28:04,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:28:04,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:28:04,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:28:04,703 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-27 16:28:04,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 16:28:04,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:28:04,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:28:04,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:28:04,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-27 16:28:04,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:28:04,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-27 16:28:04,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:28:04,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:28:04,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:28:04,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 16:28:04,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:28:04,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-27 16:28:04,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:28:04,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:28:04,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:28:04,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 16:28:04,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:28:04,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-10-27 16:28:04,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:28:04,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 16:28:04,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 16:28:04,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 16:28:04,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:28:04,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-27 16:28:04,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:28:04,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:28:04,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:28:04,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 16:28:04,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:28:04,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-10-27 16:28:04,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:28:04,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 16:28:04,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 16:28:04,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 16:28:04,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:28:05,996 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 81 proven. 24 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-27 16:28:05,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [546380258] [2020-10-27 16:28:05,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 16:28:05,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 16:28:05,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675770148] [2020-10-27 16:28:05,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 16:28:05,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:28:05,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 16:28:05,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-27 16:28:06,000 INFO L87 Difference]: Start difference. First operand 20947 states and 29063 transitions. Second operand 8 states. [2020-10-27 16:28:06,295 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-27 16:28:07,898 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-27 16:28:27,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:28:27,738 INFO L93 Difference]: Finished difference Result 63365 states and 95038 transitions. [2020-10-27 16:28:27,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 16:28:27,739 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 1034 [2020-10-27 16:28:27,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:28:27,954 INFO L225 Difference]: With dead ends: 63365 [2020-10-27 16:28:27,955 INFO L226 Difference]: Without dead ends: 42424 [2020-10-27 16:28:28,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-27 16:28:28,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42424 states. [2020-10-27 16:28:29,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42424 to 42336. [2020-10-27 16:28:29,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42336 states. [2020-10-27 16:28:29,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42336 states to 42336 states and 60802 transitions. [2020-10-27 16:28:29,506 INFO L78 Accepts]: Start accepts. Automaton has 42336 states and 60802 transitions. Word has length 1034 [2020-10-27 16:28:29,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:28:29,506 INFO L481 AbstractCegarLoop]: Abstraction has 42336 states and 60802 transitions. [2020-10-27 16:28:29,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 16:28:29,507 INFO L276 IsEmpty]: Start isEmpty. Operand 42336 states and 60802 transitions. [2020-10-27 16:28:29,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1076 [2020-10-27 16:28:29,661 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:28:29,662 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, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:28:29,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 16:28:29,662 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:28:29,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:28:29,663 INFO L82 PathProgramCache]: Analyzing trace with hash 501620198, now seen corresponding path program 1 times [2020-10-27 16:28:29,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:28:29,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1339908676] [2020-10-27 16:28:29,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:28:29,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:28:29,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:28:29,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:28:34,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:28:34,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:28:34,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1097 [2020-10-27 16:28:34,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 16:28:34,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5158 [2020-10-27 16:28:34,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:28:34,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 16:28:34,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-27 16:28:34,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-27 16:28:34,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:28:35,363 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 16:28:35,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:28:35,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:28:35,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:28:35,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:28:35,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:28:35,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:28:35,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 16:28:35,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:28:35,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:28:35,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:28:35,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:28:35,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:28:35,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 16:28:35,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:28:35,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:28:35,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:28:35,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 16:28:35,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:28:35,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 104 [2020-10-27 16:28:35,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:28:35,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:28:35,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:28:35,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 16:28:35,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:28:35,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-27 16:28:35,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:28:35,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:28:35,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:28:35,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 16:28:35,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:28:35,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 166 [2020-10-27 16:28:35,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:28:35,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 16:28:35,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 16:28:35,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-27 16:28:35,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:28:36,689 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 152 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 16:28:36,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1339908676] [2020-10-27 16:28:36,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 16:28:36,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 16:28:36,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176903371] [2020-10-27 16:28:36,691 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 16:28:36,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:28:36,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 16:28:36,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 16:28:36,692 INFO L87 Difference]: Start difference. First operand 42336 states and 60802 transitions. Second operand 7 states. [2020-10-27 16:28:36,996 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-27 16:28:39,006 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 160