/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/Problem04_label13.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 15:53:54,750 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 15:53:54,752 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 15:53:54,798 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 15:53:54,798 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 15:53:54,805 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 15:53:54,807 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 15:53:54,811 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 15:53:54,814 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 15:53:54,820 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 15:53:54,821 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 15:53:54,823 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 15:53:54,823 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 15:53:54,826 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 15:53:54,829 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 15:53:54,831 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 15:53:54,832 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 15:53:54,835 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 15:53:54,841 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 15:53:54,849 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 15:53:54,850 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 15:53:54,852 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 15:53:54,853 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 15:53:54,855 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 15:53:54,863 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 15:53:54,863 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 15:53:54,864 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 15:53:54,866 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 15:53:54,866 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 15:53:54,867 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 15:53:54,868 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 15:53:54,868 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 15:53:54,870 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 15:53:54,871 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 15:53:54,872 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 15:53:54,872 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 15:53:54,873 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 15:53:54,873 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 15:53:54,874 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 15:53:54,875 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 15:53:54,875 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 15:53:54,883 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 15:53:54,940 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 15:53:54,941 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 15:53:54,945 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 15:53:54,945 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 15:53:54,945 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 15:53:54,945 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 15:53:54,946 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 15:53:54,946 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 15:53:54,946 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 15:53:54,946 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 15:53:54,947 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 15:53:54,947 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 15:53:54,947 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 15:53:54,948 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 15:53:54,948 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 15:53:54,948 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 15:53:54,948 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 15:53:54,948 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 15:53:54,949 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 15:53:54,949 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 15:53:54,949 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 15:53:54,949 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 15:53:54,949 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 15:53:54,950 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 15:53:54,950 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 15:53:54,950 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 15:53:54,950 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 15:53:54,950 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 15:53:54,950 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 15:53:54,951 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 15:53:55,308 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 15:53:55,336 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 15:53:55,340 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 15:53:55,341 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 15:53:55,342 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 15:53:55,343 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem04_label13.c [2020-10-27 15:53:55,432 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/786fb93b6/55cbe65c48e6426c9a732c8c6a615f53/FLAG513edac7f [2020-10-27 15:53:56,430 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 15:53:56,431 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem04_label13.c [2020-10-27 15:53:56,472 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/786fb93b6/55cbe65c48e6426c9a732c8c6a615f53/FLAG513edac7f [2020-10-27 15:53:56,500 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/786fb93b6/55cbe65c48e6426c9a732c8c6a615f53 [2020-10-27 15:53:56,505 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 15:53:56,512 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 15:53:56,516 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 15:53:56,516 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 15:53:56,520 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 15:53:56,521 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 03:53:56" (1/1) ... [2020-10-27 15:53:56,526 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ef6a554 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:53:56, skipping insertion in model container [2020-10-27 15:53:56,526 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 03:53:56" (1/1) ... [2020-10-27 15:53:56,535 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 15:53:56,685 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 15:53:58,117 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 15:53:58,131 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 15:53:58,888 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 15:53:58,925 INFO L208 MainTranslator]: Completed translation [2020-10-27 15:53:58,927 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:53:58 WrapperNode [2020-10-27 15:53:58,927 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 15:53:58,928 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 15:53:58,928 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 15:53:58,928 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 15:53:58,942 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:53:58" (1/1) ... [2020-10-27 15:53:58,944 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:53:58" (1/1) ... [2020-10-27 15:53:59,035 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:53:58" (1/1) ... [2020-10-27 15:53:59,035 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:53:58" (1/1) ... [2020-10-27 15:53:59,148 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:53:58" (1/1) ... [2020-10-27 15:53:59,184 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:53:58" (1/1) ... [2020-10-27 15:53:59,205 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:53:58" (1/1) ... [2020-10-27 15:53:59,232 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 15:53:59,233 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 15:53:59,233 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 15:53:59,233 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 15:53:59,234 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:53:58" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 15:53:59,314 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 15:53:59,315 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 15:53:59,315 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 15:53:59,315 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 15:53:59,315 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 15:53:59,316 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-27 15:53:59,316 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-27 15:53:59,316 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 15:53:59,316 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 15:53:59,316 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 15:53:59,316 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-27 15:53:59,316 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-27 15:53:59,317 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 15:53:59,317 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 15:53:59,317 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 15:53:59,317 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 15:53:59,317 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 15:53:59,317 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 15:53:59,318 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 15:53:59,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 15:53:59,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 15:53:59,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 15:53:59,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 15:53:59,318 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 15:53:59,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 15:54:04,667 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 15:54:04,667 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 15:54:04,673 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 03:54:04 BoogieIcfgContainer [2020-10-27 15:54:04,673 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 15:54:04,677 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 15:54:04,677 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 15:54:04,681 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 15:54:04,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 03:53:56" (1/3) ... [2020-10-27 15:54:04,682 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ef1ce0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 03:54:04, skipping insertion in model container [2020-10-27 15:54:04,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:53:58" (2/3) ... [2020-10-27 15:54:04,683 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ef1ce0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 03:54:04, skipping insertion in model container [2020-10-27 15:54:04,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 03:54:04" (3/3) ... [2020-10-27 15:54:04,684 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem04_label13.c [2020-10-27 15:54:04,697 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 15:54:04,703 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 15:54:04,716 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 15:54:04,763 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 15:54:04,763 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 15:54:04,763 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 15:54:04,763 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 15:54:04,763 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 15:54:04,764 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 15:54:04,764 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 15:54:04,764 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 15:54:04,815 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states. [2020-10-27 15:54:04,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 792 [2020-10-27 15:54:04,868 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:54:04,870 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] [2020-10-27 15:54:04,871 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:54:04,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:54:04,878 INFO L82 PathProgramCache]: Analyzing trace with hash 824180392, now seen corresponding path program 1 times [2020-10-27 15:54:04,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:54:04,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [109909157] [2020-10-27 15:54:04,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:54:05,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:54:06,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:54:10,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:54:10,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:54:10,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 807 [2020-10-27 15:54:10,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 15:54:10,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5183 [2020-10-27 15:54:10,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:54:10,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 15:54:10,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 15:54:10,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 798 [2020-10-27 15:54:10,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 15:54:11,693 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-27 15:54:11,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:54:11,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:54:11,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:54:11,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:54:11,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:54:11,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:54:11,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-27 15:54:11,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:54:11,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:54:11,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:54:11,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 15:54:11,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:54:12,867 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 15:54:12,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [109909157] [2020-10-27 15:54:12,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 15:54:12,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 15:54:12,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338073229] [2020-10-27 15:54:12,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 15:54:12,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:54:12,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 15:54:12,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 15:54:12,895 INFO L87 Difference]: Start difference. First operand 910 states. Second operand 5 states. [2020-10-27 15:54:13,125 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-27 15:54:23,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:54:23,158 INFO L93 Difference]: Finished difference Result 2677 states and 5144 transitions. [2020-10-27 15:54:23,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 15:54:23,160 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 791 [2020-10-27 15:54:23,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:54:23,193 INFO L225 Difference]: With dead ends: 2677 [2020-10-27 15:54:23,193 INFO L226 Difference]: Without dead ends: 1703 [2020-10-27 15:54:23,202 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 15:54:23,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1703 states. [2020-10-27 15:54:23,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1703 to 1688. [2020-10-27 15:54:23,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1688 states. [2020-10-27 15:54:23,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1688 states to 1688 states and 3016 transitions. [2020-10-27 15:54:23,358 INFO L78 Accepts]: Start accepts. Automaton has 1688 states and 3016 transitions. Word has length 791 [2020-10-27 15:54:23,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:54:23,361 INFO L481 AbstractCegarLoop]: Abstraction has 1688 states and 3016 transitions. [2020-10-27 15:54:23,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 15:54:23,361 INFO L276 IsEmpty]: Start isEmpty. Operand 1688 states and 3016 transitions. [2020-10-27 15:54:23,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 811 [2020-10-27 15:54:23,393 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:54:23,394 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] [2020-10-27 15:54:23,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 15:54:23,395 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:54:23,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:54:23,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1007666473, now seen corresponding path program 1 times [2020-10-27 15:54:23,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:54:23,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [641310536] [2020-10-27 15:54:23,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:54:23,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:54:23,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:54:24,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:54:28,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:54:28,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:54:28,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 828 [2020-10-27 15:54:28,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 15:54:28,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5075 [2020-10-27 15:54:28,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:54:28,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 15:54:28,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-27 15:54:28,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 705 [2020-10-27 15:54:28,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:54:30,843 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 32 [2020-10-27 15:54:30,982 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 38 [2020-10-27 15:54:31,119 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 37 [2020-10-27 15:54:31,249 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 36 [2020-10-27 15:54:32,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:54:32,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:54:32,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:54:32,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:54:32,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:54:32,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:54:32,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 15:54:32,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:54:32,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:54:32,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:54:32,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:54:32,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:54:32,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 15:54:32,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:54:32,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:54:32,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:54:32,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-27 15:54:32,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:54:32,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-27 15:54:32,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:54:32,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:54:32,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:54:32,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 15:54:32,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 15:54:37,078 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 15:54:37,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [641310536] [2020-10-27 15:54:37,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:54:37,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 15:54:37,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285281126] [2020-10-27 15:54:37,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 15:54:37,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:54:37,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 15:54:37,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2020-10-27 15:54:37,084 INFO L87 Difference]: Start difference. First operand 1688 states and 3016 transitions. Second operand 19 states. [2020-10-27 15:54:37,590 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-10-27 15:54:37,782 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-27 15:54:38,256 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-27 15:54:41,675 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 15:54:43,063 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-27 15:54:44,620 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-27 15:54:45,202 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-10-27 15:54:45,381 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-10-27 15:54:46,625 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2020-10-27 15:54:52,186 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-10-27 15:54:52,341 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-10-27 15:54:59,010 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-27 15:54:59,199 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-10-27 15:55:01,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:55:01,479 INFO L93 Difference]: Finished difference Result 4081 states and 7445 transitions. [2020-10-27 15:55:01,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 15:55:01,480 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 810 [2020-10-27 15:55:01,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:55:01,499 INFO L225 Difference]: With dead ends: 4081 [2020-10-27 15:55:01,499 INFO L226 Difference]: Without dead ends: 2399 [2020-10-27 15:55:01,504 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=179, Invalid=813, Unknown=0, NotChecked=0, Total=992 [2020-10-27 15:55:01,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2399 states. [2020-10-27 15:55:01,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2399 to 2395. [2020-10-27 15:55:01,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2395 states. [2020-10-27 15:55:01,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2395 states to 2395 states and 3737 transitions. [2020-10-27 15:55:01,582 INFO L78 Accepts]: Start accepts. Automaton has 2395 states and 3737 transitions. Word has length 810 [2020-10-27 15:55:01,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:55:01,584 INFO L481 AbstractCegarLoop]: Abstraction has 2395 states and 3737 transitions. [2020-10-27 15:55:01,585 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 15:55:01,585 INFO L276 IsEmpty]: Start isEmpty. Operand 2395 states and 3737 transitions. [2020-10-27 15:55:01,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 813 [2020-10-27 15:55:01,597 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:55:01,598 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 15:55:01,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 15:55:01,601 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:55:01,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:55:01,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1899757125, now seen corresponding path program 1 times [2020-10-27 15:55:01,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:55:01,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [863345100] [2020-10-27 15:55:01,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:55:01,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:55:01,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:55:02,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:55:06,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:55:06,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 830 [2020-10-27 15:55:06,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 15:55:06,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5041 [2020-10-27 15:55:06,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:55:06,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 15:55:06,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-27 15:55:06,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 795 [2020-10-27 15:55:06,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:55:07,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:55:07,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:55:07,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:55:07,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:55:07,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:55:07,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:55:07,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 15:55:07,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:55:07,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:55:07,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:55:07,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:55:07,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:55:07,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 15:55:07,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:55:07,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:55:07,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:55:07,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 15:55:07,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:55:07,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-27 15:55:07,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:55:07,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:55:07,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:55:07,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 15:55:07,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:55:07,850 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 15:55:07,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [863345100] [2020-10-27 15:55:07,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:55:07,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 15:55:07,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252309819] [2020-10-27 15:55:07,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 15:55:07,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:55:07,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 15:55:07,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 15:55:07,854 INFO L87 Difference]: Start difference. First operand 2395 states and 3737 transitions. Second operand 6 states. [2020-10-27 15:55:22,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:55:22,233 INFO L93 Difference]: Finished difference Result 8193 states and 13727 transitions. [2020-10-27 15:55:22,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 15:55:22,241 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 812 [2020-10-27 15:55:22,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:55:22,282 INFO L225 Difference]: With dead ends: 8193 [2020-10-27 15:55:22,283 INFO L226 Difference]: Without dead ends: 5804 [2020-10-27 15:55:22,291 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 15:55:22,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5804 states. [2020-10-27 15:55:22,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5804 to 5796. [2020-10-27 15:55:22,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5796 states. [2020-10-27 15:55:22,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5796 states to 5796 states and 9395 transitions. [2020-10-27 15:55:22,499 INFO L78 Accepts]: Start accepts. Automaton has 5796 states and 9395 transitions. Word has length 812 [2020-10-27 15:55:22,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:55:22,503 INFO L481 AbstractCegarLoop]: Abstraction has 5796 states and 9395 transitions. [2020-10-27 15:55:22,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 15:55:22,503 INFO L276 IsEmpty]: Start isEmpty. Operand 5796 states and 9395 transitions. [2020-10-27 15:55:22,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 822 [2020-10-27 15:55:22,528 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:55:22,528 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2020-10-27 15:55:22,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 15:55:22,529 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:55:22,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:55:22,530 INFO L82 PathProgramCache]: Analyzing trace with hash -590855504, now seen corresponding path program 1 times [2020-10-27 15:55:22,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:55:22,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [838124238] [2020-10-27 15:55:22,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:55:22,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:55:22,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:55:22,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:55:26,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:55:27,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:55:27,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 841 [2020-10-27 15:55:27,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 15:55:27,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5080 [2020-10-27 15:55:27,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:55:27,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 15:55:27,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-27 15:55:27,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 795 [2020-10-27 15:55:27,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:55:28,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:55:28,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:55:28,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:55:28,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:55:28,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:55:28,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:55:28,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 15:55:28,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:55:28,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:55:28,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:55:28,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:55:28,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:55:28,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 15:55:28,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:55:28,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:55:28,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:55:28,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 15:55:28,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:55:28,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 15:55:28,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:55:28,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:55:28,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:55:28,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:55:28,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:55:28,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-27 15:55:28,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:55:28,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:55:28,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:55:28,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 15:55:28,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:55:28,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 15:55:28,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:55:28,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:55:28,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:55:28,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 15:55:28,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:55:28,814 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-27 15:55:28,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [838124238] [2020-10-27 15:55:28,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:55:28,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 15:55:28,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717963655] [2020-10-27 15:55:28,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 15:55:28,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:55:28,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 15:55:28,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 15:55:28,818 INFO L87 Difference]: Start difference. First operand 5796 states and 9395 transitions. Second operand 5 states. [2020-10-27 15:55:39,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:55:39,985 INFO L93 Difference]: Finished difference Result 16678 states and 27933 transitions. [2020-10-27 15:55:39,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 15:55:39,987 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 821 [2020-10-27 15:55:39,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:55:40,052 INFO L225 Difference]: With dead ends: 16678 [2020-10-27 15:55:40,052 INFO L226 Difference]: Without dead ends: 10888 [2020-10-27 15:55:40,066 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 15:55:40,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10888 states. [2020-10-27 15:55:40,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10888 to 10884. [2020-10-27 15:55:40,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10884 states. [2020-10-27 15:55:40,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10884 states to 10884 states and 17478 transitions. [2020-10-27 15:55:40,402 INFO L78 Accepts]: Start accepts. Automaton has 10884 states and 17478 transitions. Word has length 821 [2020-10-27 15:55:40,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:55:40,404 INFO L481 AbstractCegarLoop]: Abstraction has 10884 states and 17478 transitions. [2020-10-27 15:55:40,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 15:55:40,404 INFO L276 IsEmpty]: Start isEmpty. Operand 10884 states and 17478 transitions. [2020-10-27 15:55:40,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 835 [2020-10-27 15:55:40,446 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:55:40,447 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:55:40,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 15:55:40,448 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:55:40,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:55:40,449 INFO L82 PathProgramCache]: Analyzing trace with hash 877280647, now seen corresponding path program 1 times [2020-10-27 15:55:40,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:55:40,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1445155459] [2020-10-27 15:55:40,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:55:40,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:55:40,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:55:40,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:55:45,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:55:45,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 852 [2020-10-27 15:55:45,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 15:55:45,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5104 [2020-10-27 15:55:45,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:55:45,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 15:55:45,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-27 15:55:45,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 689 [2020-10-27 15:55:45,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:55:48,066 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 40 [2020-10-27 15:55:48,207 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 40 [2020-10-27 15:55:48,426 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 41 [2020-10-27 15:55:48,659 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 39 [2020-10-27 15:55:49,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:55:49,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:55:49,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:55:49,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:55:49,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:55:49,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:55:49,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 15:55:49,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:55:49,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:55:49,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:55:49,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:55:49,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:55:49,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 15:55:49,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:55:49,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:55:49,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:55:49,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 15:55:49,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:55:49,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-27 15:55:49,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:55:49,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:55:49,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:55:49,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 15:55:49,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:55:54,651 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 39 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 15:55:54,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1445155459] [2020-10-27 15:55:54,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:55:54,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 15:55:54,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113314447] [2020-10-27 15:55:54,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 15:55:54,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:55:54,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 15:55:54,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2020-10-27 15:55:54,654 INFO L87 Difference]: Start difference. First operand 10884 states and 17478 transitions. Second operand 19 states. [2020-10-27 15:55:55,202 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-27 15:55:55,391 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-27 15:55:57,885 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-27 15:55:58,796 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-27 15:56:00,401 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2020-10-27 15:56:00,575 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-10-27 15:56:05,263 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-27 15:56:05,480 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-27 15:56:06,931 WARN L193 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 123 [2020-10-27 15:56:08,102 WARN L193 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 122 [2020-10-27 15:56:09,414 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 119 [2020-10-27 15:56:11,413 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-10-27 15:56:11,572 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-10-27 15:56:12,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:56:12,391 INFO L93 Difference]: Finished difference Result 22446 states and 36401 transitions. [2020-10-27 15:56:12,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 15:56:12,392 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 834 [2020-10-27 15:56:12,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:56:12,453 INFO L225 Difference]: With dead ends: 22446 [2020-10-27 15:56:12,453 INFO L226 Difference]: Without dead ends: 11568 [2020-10-27 15:56:12,481 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=173, Invalid=819, Unknown=0, NotChecked=0, Total=992 [2020-10-27 15:56:12,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11568 states. [2020-10-27 15:56:12,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11568 to 11564. [2020-10-27 15:56:12,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11564 states. [2020-10-27 15:56:12,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11564 states to 11564 states and 18186 transitions. [2020-10-27 15:56:12,843 INFO L78 Accepts]: Start accepts. Automaton has 11564 states and 18186 transitions. Word has length 834 [2020-10-27 15:56:12,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:56:12,845 INFO L481 AbstractCegarLoop]: Abstraction has 11564 states and 18186 transitions. [2020-10-27 15:56:12,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 15:56:12,845 INFO L276 IsEmpty]: Start isEmpty. Operand 11564 states and 18186 transitions. [2020-10-27 15:56:12,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 850 [2020-10-27 15:56:12,883 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:56:12,884 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 15:56:12,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 15:56:12,885 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:56:12,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:56:12,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1920933258, now seen corresponding path program 1 times [2020-10-27 15:56:12,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:56:12,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [155660521] [2020-10-27 15:56:12,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:56:12,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:56:13,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:56:13,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:56:16,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:56:18,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:56:18,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 867 [2020-10-27 15:56:18,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 15:56:18,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5076 [2020-10-27 15:56:18,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:56:18,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 15:56:18,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 68 [2020-10-27 15:56:18,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 775 [2020-10-27 15:56:18,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:56:18,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:56:18,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:56:18,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:56:18,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:56:18,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:56:18,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:56:18,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 15:56:18,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:56:18,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:56:18,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:56:18,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:56:18,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:56:18,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 15:56:18,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:56:18,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:56:18,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:56:18,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 15:56:18,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:56:18,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-10-27 15:56:18,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:56:18,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:56:18,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:56:18,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-27 15:56:18,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:56:25,046 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 54 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 15:56:25,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [155660521] [2020-10-27 15:56:25,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:56:25,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 15:56:25,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131907769] [2020-10-27 15:56:25,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 15:56:25,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:56:25,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 15:56:25,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 15:56:25,049 INFO L87 Difference]: Start difference. First operand 11564 states and 18186 transitions. Second operand 5 states. [2020-10-27 15:56:25,630 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-27 15:56:36,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:56:36,008 INFO L93 Difference]: Finished difference Result 23892 states and 37970 transitions. [2020-10-27 15:56:36,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 15:56:36,009 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 849 [2020-10-27 15:56:36,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:56:36,049 INFO L225 Difference]: With dead ends: 23892 [2020-10-27 15:56:36,051 INFO L226 Difference]: Without dead ends: 11568 [2020-10-27 15:56:36,077 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 15:56:36,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11568 states. [2020-10-27 15:56:36,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11568 to 11564. [2020-10-27 15:56:36,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11564 states. [2020-10-27 15:56:36,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11564 states to 11564 states and 18180 transitions. [2020-10-27 15:56:36,344 INFO L78 Accepts]: Start accepts. Automaton has 11564 states and 18180 transitions. Word has length 849 [2020-10-27 15:56:36,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:56:36,344 INFO L481 AbstractCegarLoop]: Abstraction has 11564 states and 18180 transitions. [2020-10-27 15:56:36,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 15:56:36,345 INFO L276 IsEmpty]: Start isEmpty. Operand 11564 states and 18180 transitions. [2020-10-27 15:56:36,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 906 [2020-10-27 15:56:36,378 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:56:36,379 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 15:56:36,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 15:56:36,379 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:56:36,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:56:36,381 INFO L82 PathProgramCache]: Analyzing trace with hash -411862150, now seen corresponding path program 1 times [2020-10-27 15:56:36,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:56:36,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1315019381] [2020-10-27 15:56:36,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:56:36,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:56:36,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:56:37,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:56:39,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:56:41,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:56:41,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 923 [2020-10-27 15:56:41,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 15:56:41,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-27 15:56:41,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:56:41,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 15:56:41,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 124 [2020-10-27 15:56:41,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 795 [2020-10-27 15:56:41,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:56:42,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:56:42,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:56:42,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:56:42,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:56:42,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:56:42,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:56:42,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 15:56:42,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:56:42,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:56:42,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:56:42,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:56:42,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:56:42,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 15:56:42,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:56:42,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:56:42,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:56:42,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-27 15:56:42,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:56:42,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 132 [2020-10-27 15:56:42,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:56:42,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:56:42,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:56:42,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 109 [2020-10-27 15:56:42,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:56:43,351 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 110 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 15:56:43,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1315019381] [2020-10-27 15:56:43,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:56:43,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 15:56:43,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800888533] [2020-10-27 15:56:43,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 15:56:43,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:56:43,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 15:56:43,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 15:56:43,354 INFO L87 Difference]: Start difference. First operand 11564 states and 18180 transitions. Second operand 6 states. [2020-10-27 15:56:56,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:56:56,201 INFO L93 Difference]: Finished difference Result 33254 states and 54196 transitions. [2020-10-27 15:56:56,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 15:56:56,202 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 905 [2020-10-27 15:56:56,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:56:56,295 INFO L225 Difference]: With dead ends: 33254 [2020-10-27 15:56:56,295 INFO L226 Difference]: Without dead ends: 21696 [2020-10-27 15:56:56,323 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 15:56:56,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21696 states. [2020-10-27 15:56:56,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21696 to 21688. [2020-10-27 15:56:56,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21688 states. [2020-10-27 15:56:57,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21688 states to 21688 states and 31542 transitions. [2020-10-27 15:56:57,032 INFO L78 Accepts]: Start accepts. Automaton has 21688 states and 31542 transitions. Word has length 905 [2020-10-27 15:56:57,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:56:57,034 INFO L481 AbstractCegarLoop]: Abstraction has 21688 states and 31542 transitions. [2020-10-27 15:56:57,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 15:56:57,034 INFO L276 IsEmpty]: Start isEmpty. Operand 21688 states and 31542 transitions. [2020-10-27 15:56:57,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 909 [2020-10-27 15:56:57,090 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:56:57,091 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 15:56:57,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 15:56:57,091 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:56:57,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:56:57,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1893364613, now seen corresponding path program 1 times [2020-10-27 15:56:57,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:56:57,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [276900177] [2020-10-27 15:56:57,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:56:57,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:56:57,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:56:57,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:57:02,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:57:02,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 926 [2020-10-27 15:57:02,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 15:57:02,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5068 [2020-10-27 15:57:02,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:57:02,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 15:57:02,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 127 [2020-10-27 15:57:02,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 466 [2020-10-27 15:57:02,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:57:03,920 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 35 [2020-10-27 15:57:04,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:57:04,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:57:04,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:57:04,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:57:04,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:57:04,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:57:04,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 15:57:04,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:57:04,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:57:04,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:57:04,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:57:04,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:57:04,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 15:57:04,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:57:04,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:57:04,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:57:04,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-27 15:57:04,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:57:04,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-10-27 15:57:04,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:57:04,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:57:04,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:57:04,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-27 15:57:04,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:57:08,259 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 113 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 15:57:08,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [276900177] [2020-10-27 15:57:08,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:57:08,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 15:57:08,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854501423] [2020-10-27 15:57:08,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 15:57:08,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:57:08,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 15:57:08,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-10-27 15:57:08,262 INFO L87 Difference]: Start difference. First operand 21688 states and 31542 transitions. Second operand 17 states. [2020-10-27 15:57:10,007 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-27 15:57:10,206 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-27 15:57:10,422 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-27 15:57:10,909 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-27 15:57:11,112 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-10-27 15:57:16,198 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-27 15:57:16,481 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-27 15:57:17,456 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-27 15:57:21,127 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-10-27 15:57:22,522 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2020-10-27 15:57:22,675 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-27 15:57:26,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:57:26,101 INFO L93 Difference]: Finished difference Result 43857 states and 64193 transitions. [2020-10-27 15:57:26,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 15:57:26,103 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 908 [2020-10-27 15:57:26,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:57:26,177 INFO L225 Difference]: With dead ends: 43857 [2020-10-27 15:57:26,177 INFO L226 Difference]: Without dead ends: 22175 [2020-10-27 15:57:26,213 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=153, Invalid=603, Unknown=0, NotChecked=0, Total=756 [2020-10-27 15:57:26,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22175 states. [2020-10-27 15:57:26,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22175 to 22165. [2020-10-27 15:57:26,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22165 states. [2020-10-27 15:57:26,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22165 states to 22165 states and 32076 transitions. [2020-10-27 15:57:26,673 INFO L78 Accepts]: Start accepts. Automaton has 22165 states and 32076 transitions. Word has length 908 [2020-10-27 15:57:26,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:57:26,674 INFO L481 AbstractCegarLoop]: Abstraction has 22165 states and 32076 transitions. [2020-10-27 15:57:26,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 15:57:26,675 INFO L276 IsEmpty]: Start isEmpty. Operand 22165 states and 32076 transitions. [2020-10-27 15:57:26,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 915 [2020-10-27 15:57:26,718 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:57:26,719 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, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 15:57:26,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 15:57:26,719 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:57:26,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:57:26,720 INFO L82 PathProgramCache]: Analyzing trace with hash 678243417, now seen corresponding path program 1 times [2020-10-27 15:57:26,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:57:26,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [488631775] [2020-10-27 15:57:26,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:57:26,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:57:26,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:57:26,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:57:27,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking...