/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem06_label23.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 21:32:01,908 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 21:32:01,913 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 21:32:01,968 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 21:32:01,969 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 21:32:01,975 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 21:32:01,977 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 21:32:01,981 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 21:32:01,985 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 21:32:01,991 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 21:32:01,992 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 21:32:01,993 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 21:32:01,994 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 21:32:01,997 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 21:32:01,999 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 21:32:02,000 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 21:32:02,002 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 21:32:02,005 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 21:32:02,012 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 21:32:02,020 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 21:32:02,022 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 21:32:02,023 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 21:32:02,025 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 21:32:02,027 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 21:32:02,036 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 21:32:02,036 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 21:32:02,036 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 21:32:02,038 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 21:32:02,039 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 21:32:02,040 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 21:32:02,040 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 21:32:02,041 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 21:32:02,044 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 21:32:02,044 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 21:32:02,047 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 21:32:02,047 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 21:32:02,048 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 21:32:02,048 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 21:32:02,048 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 21:32:02,049 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 21:32:02,050 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 21:32:02,058 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-26 21:32:02,107 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 21:32:02,107 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 21:32:02,112 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 21:32:02,112 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 21:32:02,112 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 21:32:02,112 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 21:32:02,113 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 21:32:02,113 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 21:32:02,113 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 21:32:02,113 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 21:32:02,114 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 21:32:02,114 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 21:32:02,115 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 21:32:02,115 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 21:32:02,115 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 21:32:02,115 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 21:32:02,115 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 21:32:02,116 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 21:32:02,116 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 21:32:02,116 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 21:32:02,116 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 21:32:02,116 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 21:32:02,117 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 21:32:02,117 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 21:32:02,117 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 21:32:02,117 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 21:32:02,117 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 21:32:02,118 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 21:32:02,118 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 21:32:02,118 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 21:32:02,509 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 21:32:02,542 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 21:32:02,546 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 21:32:02,547 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 21:32:02,548 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 21:32:02,549 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem06_label23.c [2020-10-26 21:32:02,624 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5363b8c4d/e8ff82c91af943f8bd65624f1adb2083/FLAG57a975ac2 [2020-10-26 21:32:03,930 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 21:32:03,931 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem06_label23.c [2020-10-26 21:32:04,008 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5363b8c4d/e8ff82c91af943f8bd65624f1adb2083/FLAG57a975ac2 [2020-10-26 21:32:04,042 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5363b8c4d/e8ff82c91af943f8bd65624f1adb2083 [2020-10-26 21:32:04,046 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 21:32:04,056 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 21:32:04,060 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 21:32:04,060 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 21:32:04,064 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 21:32:04,066 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:32:04" (1/1) ... [2020-10-26 21:32:04,072 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10ac07ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:32:04, skipping insertion in model container [2020-10-26 21:32:04,072 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:32:04" (1/1) ... [2020-10-26 21:32:04,082 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 21:32:04,407 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 21:32:06,746 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 21:32:06,766 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 21:32:08,011 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 21:32:08,071 INFO L208 MainTranslator]: Completed translation [2020-10-26 21:32:08,072 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:32:08 WrapperNode [2020-10-26 21:32:08,073 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 21:32:08,074 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 21:32:08,074 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 21:32:08,074 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 21:32:08,088 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:32:08" (1/1) ... [2020-10-26 21:32:08,090 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:32:08" (1/1) ... [2020-10-26 21:32:08,211 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:32:08" (1/1) ... [2020-10-26 21:32:08,212 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:32:08" (1/1) ... [2020-10-26 21:32:08,546 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:32:08" (1/1) ... [2020-10-26 21:32:08,584 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:32:08" (1/1) ... [2020-10-26 21:32:08,660 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:32:08" (1/1) ... [2020-10-26 21:32:08,819 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 21:32:08,820 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 21:32:08,820 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 21:32:08,821 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 21:32:08,821 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:32:08" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 21:32:08,897 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 21:32:08,897 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 21:32:08,897 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 21:32:08,897 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 21:32:08,898 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-26 21:32:08,898 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-26 21:32:08,898 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-26 21:32:08,898 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-26 21:32:08,898 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 21:32:08,898 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 21:32:08,899 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-26 21:32:08,899 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-26 21:32:08,899 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-26 21:32:08,899 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-26 21:32:08,899 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 21:32:08,899 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 21:32:08,899 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 21:32:08,900 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 21:32:08,900 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 21:32:08,900 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 21:32:08,900 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 21:32:08,900 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 21:32:08,900 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 21:32:08,901 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 21:32:08,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 21:32:08,901 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 21:32:08,901 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 21:32:16,626 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 21:32:16,626 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 21:32:16,631 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:32:16 BoogieIcfgContainer [2020-10-26 21:32:16,631 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 21:32:16,636 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 21:32:16,636 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 21:32:16,640 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 21:32:16,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 09:32:04" (1/3) ... [2020-10-26 21:32:16,641 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54ba20de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 09:32:16, skipping insertion in model container [2020-10-26 21:32:16,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:32:08" (2/3) ... [2020-10-26 21:32:16,642 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54ba20de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 09:32:16, skipping insertion in model container [2020-10-26 21:32:16,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:32:16" (3/3) ... [2020-10-26 21:32:16,644 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem06_label23.c [2020-10-26 21:32:16,657 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 21:32:16,668 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 21:32:16,682 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 21:32:16,729 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 21:32:16,729 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 21:32:16,729 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 21:32:16,729 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 21:32:16,729 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 21:32:16,730 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 21:32:16,730 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 21:32:16,730 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 21:32:16,780 INFO L276 IsEmpty]: Start isEmpty. Operand 1319 states. [2020-10-26 21:32:16,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 983 [2020-10-26 21:32:16,855 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:32:16,858 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 21:32:16,858 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:32:16,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:32:16,868 INFO L82 PathProgramCache]: Analyzing trace with hash -45380576, now seen corresponding path program 1 times [2020-10-26 21:32:16,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:32:16,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [350401213] [2020-10-26 21:32:16,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:32:17,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:32:18,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:32:21,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:32:22,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:32:22,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1000 [2020-10-26 21:32:22,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:32:22,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-26 21:32:22,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:32:22,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 21:32:22,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:32:22,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 991 [2020-10-26 21:32:22,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 12 [2020-10-26 21:32:24,341 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 21:32:24,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:32:24,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:32:24,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:32:24,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:32:24,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:32:24,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:32:24,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-26 21:32:24,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:32:24,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:32:24,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:32:24,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:32:24,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:32:25,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 21:32:25,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [350401213] [2020-10-26 21:32:25,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 21:32:25,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 21:32:25,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076004504] [2020-10-26 21:32:25,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 21:32:25,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:32:25,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 21:32:25,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 21:32:25,687 INFO L87 Difference]: Start difference. First operand 1319 states. Second operand 4 states. [2020-10-26 21:32:25,918 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 21:32:42,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:32:42,912 INFO L93 Difference]: Finished difference Result 3764 states and 7025 transitions. [2020-10-26 21:32:42,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 21:32:42,915 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 982 [2020-10-26 21:32:42,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:32:42,977 INFO L225 Difference]: With dead ends: 3764 [2020-10-26 21:32:42,977 INFO L226 Difference]: Without dead ends: 2381 [2020-10-26 21:32:42,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 21:32:43,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2381 states. [2020-10-26 21:32:43,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2381 to 2338. [2020-10-26 21:32:43,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2338 states. [2020-10-26 21:32:43,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2338 states to 2338 states and 3805 transitions. [2020-10-26 21:32:43,234 INFO L78 Accepts]: Start accepts. Automaton has 2338 states and 3805 transitions. Word has length 982 [2020-10-26 21:32:43,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:32:43,239 INFO L481 AbstractCegarLoop]: Abstraction has 2338 states and 3805 transitions. [2020-10-26 21:32:43,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 21:32:43,239 INFO L276 IsEmpty]: Start isEmpty. Operand 2338 states and 3805 transitions. [2020-10-26 21:32:43,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 991 [2020-10-26 21:32:43,352 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:32:43,354 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 21:32:43,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 21:32:43,355 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:32:43,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:32:43,357 INFO L82 PathProgramCache]: Analyzing trace with hash 2048247777, now seen corresponding path program 1 times [2020-10-26 21:32:43,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:32:43,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1419631267] [2020-10-26 21:32:43,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:32:43,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:32:43,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:32:46,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:32:48,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:32:48,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1010 [2020-10-26 21:32:48,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:32:48,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5218 [2020-10-26 21:32:48,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:32:48,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 21:32:48,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:32:48,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 21:32:48,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:32:50,093 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 21:32:50,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:32:50,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:32:50,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:32:50,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:32:50,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:32:50,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:32:50,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-26 21:32:50,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:32:50,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:32:50,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:32:50,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:32:50,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:32:50,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:32:50,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:32:50,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:32:50,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:32:50,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 21:32:50,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:32:50,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-26 21:32:50,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:32:50,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:32:50,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:32:50,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-26 21:32:50,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:32:51,068 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 21:32:51,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1419631267] [2020-10-26 21:32:51,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 21:32:51,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 21:32:51,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034133671] [2020-10-26 21:32:51,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 21:32:51,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:32:51,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 21:32:51,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 21:32:51,073 INFO L87 Difference]: Start difference. First operand 2338 states and 3805 transitions. Second operand 7 states. [2020-10-26 21:32:51,363 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 21:33:15,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:33:15,887 INFO L93 Difference]: Finished difference Result 7094 states and 11572 transitions. [2020-10-26 21:33:15,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 21:33:15,893 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 990 [2020-10-26 21:33:15,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:33:15,924 INFO L225 Difference]: With dead ends: 7094 [2020-10-26 21:33:15,924 INFO L226 Difference]: Without dead ends: 4762 [2020-10-26 21:33:15,931 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-26 21:33:15,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4762 states. [2020-10-26 21:33:16,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4762 to 4722. [2020-10-26 21:33:16,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4722 states. [2020-10-26 21:33:16,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4722 states to 4722 states and 7664 transitions. [2020-10-26 21:33:16,108 INFO L78 Accepts]: Start accepts. Automaton has 4722 states and 7664 transitions. Word has length 990 [2020-10-26 21:33:16,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:33:16,109 INFO L481 AbstractCegarLoop]: Abstraction has 4722 states and 7664 transitions. [2020-10-26 21:33:16,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 21:33:16,109 INFO L276 IsEmpty]: Start isEmpty. Operand 4722 states and 7664 transitions. [2020-10-26 21:33:16,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 998 [2020-10-26 21:33:16,135 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:33:16,136 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 21:33:16,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 21:33:16,136 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:33:16,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:33:16,138 INFO L82 PathProgramCache]: Analyzing trace with hash 2080918510, now seen corresponding path program 1 times [2020-10-26 21:33:16,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:33:16,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2025992117] [2020-10-26 21:33:16,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:33:16,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:33:16,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:33:18,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:33:21,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:33:21,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:33:21,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1017 [2020-10-26 21:33:21,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 21:33:21,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5312 [2020-10-26 21:33:21,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:33:21,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 21:33:21,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:33:21,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1008 [2020-10-26 21:33:21,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:33:22,476 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 21:33:22,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:33:22,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:33:22,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:33:22,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:33:22,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:33:22,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:33:22,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-26 21:33:22,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:33:22,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:33:22,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:33:22,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:33:22,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:33:22,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:33:22,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:33:22,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:33:22,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:33:22,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:33:22,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-26 21:33:22,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:33:22,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 83 [2020-10-26 21:33:22,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:33:22,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:33:22,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:33:22,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 21:33:22,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:33:23,932 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 21:33:23,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2025992117] [2020-10-26 21:33:23,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 21:33:23,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 21:33:23,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162485191] [2020-10-26 21:33:23,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 21:33:23,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:33:23,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 21:33:23,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 21:33:23,938 INFO L87 Difference]: Start difference. First operand 4722 states and 7664 transitions. Second operand 7 states. [2020-10-26 21:33:24,204 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 21:33:24,828 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 21:33:44,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:33:44,967 INFO L93 Difference]: Finished difference Result 14050 states and 23063 transitions. [2020-10-26 21:33:44,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 21:33:44,975 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 997 [2020-10-26 21:33:44,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:33:45,027 INFO L225 Difference]: With dead ends: 14050 [2020-10-26 21:33:45,027 INFO L226 Difference]: Without dead ends: 9334 [2020-10-26 21:33:45,040 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-26 21:33:45,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9334 states. [2020-10-26 21:33:45,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9334 to 9143. [2020-10-26 21:33:45,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9143 states. [2020-10-26 21:33:45,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9143 states to 9143 states and 13781 transitions. [2020-10-26 21:33:45,357 INFO L78 Accepts]: Start accepts. Automaton has 9143 states and 13781 transitions. Word has length 997 [2020-10-26 21:33:45,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:33:45,358 INFO L481 AbstractCegarLoop]: Abstraction has 9143 states and 13781 transitions. [2020-10-26 21:33:45,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 21:33:45,358 INFO L276 IsEmpty]: Start isEmpty. Operand 9143 states and 13781 transitions. [2020-10-26 21:33:45,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1010 [2020-10-26 21:33:45,395 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:33:45,397 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 21:33:45,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 21:33:45,399 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:33:45,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:33:45,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1520335318, now seen corresponding path program 1 times [2020-10-26 21:33:45,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:33:45,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [959777009] [2020-10-26 21:33:45,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:33:45,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:33:45,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:33:47,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:33:50,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:33:50,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1029 [2020-10-26 21:33:50,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:33:50,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 21:33:50,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:33:50,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 21:33:50,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:33:50,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 21:33:50,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:33:50,933 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 21:33:50,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:33:50,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:33:50,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:33:50,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:33:50,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:33:50,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:33:50,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-26 21:33:50,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:33:50,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:33:50,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:33:50,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:33:50,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:33:51,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:33:51,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:33:51,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:33:51,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:33:51,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-26 21:33:51,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:33:51,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-10-26 21:33:51,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:33:51,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:33:51,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:33:51,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 21:33:51,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:33:52,008 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 21:33:52,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [959777009] [2020-10-26 21:33:52,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 21:33:52,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 21:33:52,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750820086] [2020-10-26 21:33:52,010 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 21:33:52,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:33:52,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 21:33:52,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 21:33:52,011 INFO L87 Difference]: Start difference. First operand 9143 states and 13781 transitions. Second operand 7 states. [2020-10-26 21:33:52,278 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 21:33:53,339 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-26 21:34:12,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:34:12,836 INFO L93 Difference]: Finished difference Result 27549 states and 42775 transitions. [2020-10-26 21:34:12,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 21:34:12,837 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1009 [2020-10-26 21:34:12,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:34:12,916 INFO L225 Difference]: With dead ends: 27549 [2020-10-26 21:34:12,916 INFO L226 Difference]: Without dead ends: 18412 [2020-10-26 21:34:12,944 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-26 21:34:12,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18412 states. [2020-10-26 21:34:13,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18412 to 18216. [2020-10-26 21:34:13,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18216 states. [2020-10-26 21:34:13,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18216 states to 18216 states and 26657 transitions. [2020-10-26 21:34:13,465 INFO L78 Accepts]: Start accepts. Automaton has 18216 states and 26657 transitions. Word has length 1009 [2020-10-26 21:34:13,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:34:13,465 INFO L481 AbstractCegarLoop]: Abstraction has 18216 states and 26657 transitions. [2020-10-26 21:34:13,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 21:34:13,465 INFO L276 IsEmpty]: Start isEmpty. Operand 18216 states and 26657 transitions. [2020-10-26 21:34:13,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1020 [2020-10-26 21:34:13,530 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:34:13,531 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 21:34:13,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 21:34:13,532 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:34:13,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:34:13,533 INFO L82 PathProgramCache]: Analyzing trace with hash 944462547, now seen corresponding path program 1 times [2020-10-26 21:34:13,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:34:13,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1836656949] [2020-10-26 21:34:13,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:34:13,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:34:13,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:34:14,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:34:18,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:34:18,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1041 [2020-10-26 21:34:18,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:34:18,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5050 [2020-10-26 21:34:18,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:34:18,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 21:34:18,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:34:18,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-26 21:34:18,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:34:19,163 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 21:34:19,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:34:19,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:34:19,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:34:19,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:34:19,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:34:19,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:34:19,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-26 21:34:19,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:34:19,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:34:19,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:34:19,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:34:19,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:34:19,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:34:19,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:34:19,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:34:19,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:34:19,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-26 21:34:19,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:34:19,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-10-26 21:34:19,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:34:19,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:34:19,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:34:19,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 21:34:19,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:34:19,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-26 21:34:19,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:34:19,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:34:19,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:34:19,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-26 21:34:19,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:34:19,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-26 21:34:19,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:34:19,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 21:34:19,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-26 21:34:19,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 21:34:19,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:34:20,341 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 31 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 21:34:20,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1836656949] [2020-10-26 21:34:20,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 21:34:20,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 21:34:20,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811969519] [2020-10-26 21:34:20,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 21:34:20,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:34:20,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 21:34:20,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 21:34:20,344 INFO L87 Difference]: Start difference. First operand 18216 states and 26657 transitions. Second operand 7 states. [2020-10-26 21:34:20,608 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-26 21:34:22,058 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-26 21:34:44,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:34:44,931 INFO L93 Difference]: Finished difference Result 55462 states and 85182 transitions. [2020-10-26 21:34:44,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 21:34:44,933 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1019 [2020-10-26 21:34:44,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:34:45,084 INFO L225 Difference]: With dead ends: 55462 [2020-10-26 21:34:45,085 INFO L226 Difference]: Without dead ends: 37252 [2020-10-26 21:34:45,141 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-26 21:34:45,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37252 states. [2020-10-26 21:34:46,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37252 to 36298. [2020-10-26 21:34:46,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36298 states. [2020-10-26 21:34:46,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36298 states to 36298 states and 51408 transitions. [2020-10-26 21:34:46,388 INFO L78 Accepts]: Start accepts. Automaton has 36298 states and 51408 transitions. Word has length 1019 [2020-10-26 21:34:46,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:34:46,389 INFO L481 AbstractCegarLoop]: Abstraction has 36298 states and 51408 transitions. [2020-10-26 21:34:46,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 21:34:46,389 INFO L276 IsEmpty]: Start isEmpty. Operand 36298 states and 51408 transitions. [2020-10-26 21:34:46,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1033 [2020-10-26 21:34:46,484 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:34:46,485 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 21:34:46,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 21:34:46,485 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:34:46,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:34:46,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1490814143, now seen corresponding path program 1 times [2020-10-26 21:34:46,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:34:46,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [374790961] [2020-10-26 21:34:46,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:34:46,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:34:46,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:34:46,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:34:47,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:34:51,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:34:51,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1056 [2020-10-26 21:34:51,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 21:34:51,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5058 [2020-10-26 21:34:51,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:34:51,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 21:34:51,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:34:51,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-26 21:34:51,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:34:52,136 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 21:34:52,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:34:52,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:34:52,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:34:52,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:34:52,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:34:52,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:34:52,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-26 21:34:52,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:34:52,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:34:52,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:34:52,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:34:52,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:34:52,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:34:52,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:34:52,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:34:52,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:34:52,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-26 21:34:52,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:34:52,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-26 21:34:52,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:34:52,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:34:52,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:34:52,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 21:34:52,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:34:52,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-26 21:34:52,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:34:52,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:34:52,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:34:52,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-26 21:34:52,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:34:52,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-26 21:34:52,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:34:52,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 21:34:52,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-26 21:34:52,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 21:34:52,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:34:52,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-26 21:34:52,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:34:52,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:34:52,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:34:52,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-26 21:34:52,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:34:52,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 21:34:52,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:34:52,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 21:34:52,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-26 21:34:52,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 21:34:52,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:34:53,010 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 41 proven. 15 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-26 21:34:53,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [374790961] [2020-10-26 21:34:53,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 21:34:53,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 21:34:53,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584221888] [2020-10-26 21:34:53,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 21:34:53,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:34:53,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 21:34:53,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 21:34:53,013 INFO L87 Difference]: Start difference. First operand 36298 states and 51408 transitions. Second operand 7 states. [2020-10-26 21:34:53,303 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-26 21:34:54,730 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-26 21:35:13,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:35:13,096 INFO L93 Difference]: Finished difference Result 87370 states and 125507 transitions. [2020-10-26 21:35:13,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 21:35:13,097 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1032 [2020-10-26 21:35:13,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:35:13,301 INFO L225 Difference]: With dead ends: 87370 [2020-10-26 21:35:13,301 INFO L226 Difference]: Without dead ends: 51078 [2020-10-26 21:35:13,378 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 21:35:13,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51078 states. [2020-10-26 21:35:14,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51078 to 50125. [2020-10-26 21:35:14,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50125 states. [2020-10-26 21:35:14,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50125 states to 50125 states and 71424 transitions. [2020-10-26 21:35:14,756 INFO L78 Accepts]: Start accepts. Automaton has 50125 states and 71424 transitions. Word has length 1032 [2020-10-26 21:35:14,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:35:14,757 INFO L481 AbstractCegarLoop]: Abstraction has 50125 states and 71424 transitions. [2020-10-26 21:35:14,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 21:35:14,757 INFO L276 IsEmpty]: Start isEmpty. Operand 50125 states and 71424 transitions. [2020-10-26 21:35:15,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1037 [2020-10-26 21:35:15,295 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:35:15,296 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 21:35:15,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 21:35:15,297 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:35:15,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:35:15,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1363598489, now seen corresponding path program 1 times [2020-10-26 21:35:15,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:35:15,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [276558859] [2020-10-26 21:35:15,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:35:15,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:35:15,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:35:17,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:35:18,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:35:20,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:35:20,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1056 [2020-10-26 21:35:20,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 21:35:20,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-26 21:35:20,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:35:20,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 21:35:20,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:35:20,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-26 21:35:20,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:35:21,025 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 21:35:21,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:35:21,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:35:21,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:35:21,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:35:21,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:35:21,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:35:21,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-26 21:35:21,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:35:21,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:35:21,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:35:21,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:35:21,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:35:21,180 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-26 21:35:21,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:35:21,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:35:21,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:35:21,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:35:21,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-26 21:35:21,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:35:21,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 115 [2020-10-26 21:35:21,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:35:21,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:35:21,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:35:21,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-26 21:35:21,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:35:22,215 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 21:35:22,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [276558859] [2020-10-26 21:35:22,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 21:35:22,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 21:35:22,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793990452] [2020-10-26 21:35:22,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 21:35:22,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:35:22,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 21:35:22,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 21:35:22,218 INFO L87 Difference]: Start difference. First operand 50125 states and 71424 transitions. Second operand 7 states. [2020-10-26 21:35:22,485 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 21:35:23,906 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 162