/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_label46.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 21:39:10,924 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 21:39:10,927 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 21:39:10,981 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 21:39:10,981 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 21:39:10,988 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 21:39:10,990 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 21:39:10,995 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 21:39:10,998 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 21:39:11,004 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 21:39:11,006 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 21:39:11,008 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 21:39:11,008 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 21:39:11,011 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 21:39:11,014 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 21:39:11,017 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 21:39:11,018 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 21:39:11,022 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 21:39:11,030 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 21:39:11,053 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 21:39:11,068 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 21:39:11,071 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 21:39:11,076 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 21:39:11,079 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 21:39:11,093 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 21:39:11,094 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 21:39:11,094 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 21:39:11,097 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 21:39:11,097 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 21:39:11,098 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 21:39:11,099 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 21:39:11,099 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 21:39:11,102 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 21:39:11,102 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 21:39:11,103 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 21:39:11,104 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 21:39:11,104 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 21:39:11,105 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 21:39:11,105 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 21:39:11,106 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 21:39:11,107 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 21:39:11,114 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 21:39:11,163 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 21:39:11,163 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 21:39:11,170 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 21:39:11,170 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 21:39:11,170 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 21:39:11,170 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 21:39:11,171 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 21:39:11,172 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 21:39:11,172 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 21:39:11,172 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 21:39:11,173 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 21:39:11,173 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 21:39:11,174 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 21:39:11,174 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 21:39:11,174 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 21:39:11,174 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 21:39:11,175 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 21:39:11,175 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 21:39:11,175 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 21:39:11,177 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 21:39:11,177 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 21:39:11,182 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 21:39:11,183 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 21:39:11,183 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 21:39:11,183 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 21:39:11,183 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 21:39:11,183 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 21:39:11,184 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 21:39:11,184 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 21:39:11,184 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 21:39:11,643 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 21:39:11,692 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 21:39:11,695 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 21:39:11,697 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 21:39:11,697 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 21:39:11,698 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem06_label46.c [2020-10-26 21:39:11,785 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/288f22b64/3c795ef4ca4f4a3bae2a986cafe43f2b/FLAGcf59a766e [2020-10-26 21:39:12,955 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 21:39:12,956 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem06_label46.c [2020-10-26 21:39:13,024 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/288f22b64/3c795ef4ca4f4a3bae2a986cafe43f2b/FLAGcf59a766e [2020-10-26 21:39:13,227 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/288f22b64/3c795ef4ca4f4a3bae2a986cafe43f2b [2020-10-26 21:39:13,230 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 21:39:13,237 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 21:39:13,239 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 21:39:13,240 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 21:39:13,244 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 21:39:13,245 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:39:13" (1/1) ... [2020-10-26 21:39:13,249 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@643921e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:39:13, skipping insertion in model container [2020-10-26 21:39:13,249 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:39:13" (1/1) ... [2020-10-26 21:39:13,258 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 21:39:13,453 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 21:39:15,740 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 21:39:15,787 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 21:39:17,057 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 21:39:17,131 INFO L208 MainTranslator]: Completed translation [2020-10-26 21:39:17,133 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:39:17 WrapperNode [2020-10-26 21:39:17,133 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 21:39:17,135 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 21:39:17,135 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 21:39:17,135 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 21:39:17,151 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:39:17" (1/1) ... [2020-10-26 21:39:17,153 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:39:17" (1/1) ... [2020-10-26 21:39:17,258 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:39:17" (1/1) ... [2020-10-26 21:39:17,258 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:39:17" (1/1) ... [2020-10-26 21:39:17,448 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:39:17" (1/1) ... [2020-10-26 21:39:17,496 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:39:17" (1/1) ... [2020-10-26 21:39:17,556 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:39:17" (1/1) ... [2020-10-26 21:39:17,617 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 21:39:17,619 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 21:39:17,619 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 21:39:17,619 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 21:39:17,620 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:39:17" (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 21:39:17,703 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 21:39:17,703 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 21:39:17,703 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 21:39:17,704 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 21:39:17,704 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-26 21:39:17,704 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-26 21:39:17,704 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-26 21:39:17,704 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-26 21:39:17,705 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 21:39:17,705 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 21:39:17,705 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-26 21:39:17,705 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-26 21:39:17,705 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-26 21:39:17,705 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-26 21:39:17,706 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 21:39:17,706 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 21:39:17,706 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 21:39:17,706 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 21:39:17,706 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 21:39:17,707 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 21:39:17,707 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 21:39:17,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 21:39:17,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 21:39:17,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 21:39:17,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 21:39:17,708 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 21:39:17,708 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 21:39:26,492 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 21:39:26,492 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 21:39:26,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:39:26 BoogieIcfgContainer [2020-10-26 21:39:26,499 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 21:39:26,503 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 21:39:26,503 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 21:39:26,507 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 21:39:26,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 09:39:13" (1/3) ... [2020-10-26 21:39:26,509 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11e4b014 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 09:39:26, skipping insertion in model container [2020-10-26 21:39:26,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:39:17" (2/3) ... [2020-10-26 21:39:26,509 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11e4b014 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 09:39:26, skipping insertion in model container [2020-10-26 21:39:26,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:39:26" (3/3) ... [2020-10-26 21:39:26,511 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem06_label46.c [2020-10-26 21:39:26,525 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 21:39:26,532 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 21:39:26,546 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 21:39:26,588 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 21:39:26,589 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 21:39:26,589 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 21:39:26,589 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 21:39:26,589 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 21:39:26,589 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 21:39:26,589 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 21:39:26,590 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 21:39:26,634 INFO L276 IsEmpty]: Start isEmpty. Operand 1319 states. [2020-10-26 21:39:26,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 998 [2020-10-26 21:39:26,705 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:39:26,708 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 21:39:26,708 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:39:26,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:39:26,716 INFO L82 PathProgramCache]: Analyzing trace with hash -467156484, now seen corresponding path program 1 times [2020-10-26 21:39:26,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:39:26,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1907798706] [2020-10-26 21:39:26,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:39:27,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:39:28,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:39:31,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:39:33,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:39:33,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1015 [2020-10-26 21:39:33,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:39:33,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5339 [2020-10-26 21:39:33,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:39:33,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 21:39:33,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:39:33,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 769 [2020-10-26 21:39:33,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-26 21:39:38,242 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2020-10-26 21:39:38,719 WARN L193 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2020-10-26 21:39:39,009 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 69 [2020-10-26 21:39:39,309 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 69 [2020-10-26 21:39:39,577 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2020-10-26 21:39:39,844 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2020-10-26 21:39:40,100 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2020-10-26 21:39:40,334 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2020-10-26 21:39:40,528 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-10-26 21:39:40,755 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-10-26 21:39:40,934 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-10-26 21:39:41,226 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2020-10-26 21:39:41,390 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2020-10-26 21:39:41,564 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 48 [2020-10-26 21:39:41,786 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 21:39:41,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:39:41,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:39:41,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:39:41,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:39:41,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:39:41,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:39:41,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-26 21:39:41,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:39:41,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:39:41,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:39:41,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:39:41,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:39:54,746 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 21:39:54,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1907798706] [2020-10-26 21:39:54,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 21:39:54,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-10-26 21:39:54,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737997293] [2020-10-26 21:39:54,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 21:39:54,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:39:54,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 21:39:54,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2020-10-26 21:39:54,787 INFO L87 Difference]: Start difference. First operand 1319 states. Second operand 18 states. [2020-10-26 21:39:55,236 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-26 21:39:56,041 WARN L193 SmtUtils]: Spent 698.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 200 [2020-10-26 21:39:56,821 WARN L193 SmtUtils]: Spent 694.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 200 [2020-10-26 21:39:57,671 WARN L193 SmtUtils]: Spent 767.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 212 [2020-10-26 21:40:01,690 WARN L193 SmtUtils]: Spent 800.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 211 [2020-10-26 21:40:05,140 WARN L193 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 221 DAG size of output: 210 [2020-10-26 21:40:07,613 WARN L193 SmtUtils]: Spent 662.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 197 [2020-10-26 21:40:08,409 WARN L193 SmtUtils]: Spent 714.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 207 [2020-10-26 21:40:09,482 WARN L193 SmtUtils]: Spent 723.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 206 [2020-10-26 21:40:18,561 WARN L193 SmtUtils]: Spent 649.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 195 [2020-10-26 21:40:19,317 WARN L193 SmtUtils]: Spent 676.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 204 [2020-10-26 21:40:22,138 WARN L193 SmtUtils]: Spent 668.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 203 [2020-10-26 21:40:29,121 WARN L193 SmtUtils]: Spent 637.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 193 [2020-10-26 21:40:29,936 WARN L193 SmtUtils]: Spent 703.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 202 [2020-10-26 21:40:32,330 WARN L193 SmtUtils]: Spent 687.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 197 [2020-10-26 21:40:43,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:40:43,737 INFO L93 Difference]: Finished difference Result 3401 states and 6365 transitions. [2020-10-26 21:40:43,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 21:40:43,739 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 997 [2020-10-26 21:40:43,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:40:43,781 INFO L225 Difference]: With dead ends: 3401 [2020-10-26 21:40:43,781 INFO L226 Difference]: Without dead ends: 2020 [2020-10-26 21:40:43,796 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=155, Invalid=901, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 21:40:43,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2020 states. [2020-10-26 21:40:43,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2020 to 2020. [2020-10-26 21:40:43,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2020 states. [2020-10-26 21:40:43,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2020 states to 2020 states and 3054 transitions. [2020-10-26 21:40:43,961 INFO L78 Accepts]: Start accepts. Automaton has 2020 states and 3054 transitions. Word has length 997 [2020-10-26 21:40:43,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:40:43,965 INFO L481 AbstractCegarLoop]: Abstraction has 2020 states and 3054 transitions. [2020-10-26 21:40:43,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 21:40:43,965 INFO L276 IsEmpty]: Start isEmpty. Operand 2020 states and 3054 transitions. [2020-10-26 21:40:44,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1068 [2020-10-26 21:40:44,013 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:40:44,014 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:40:44,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 21:40:44,015 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:40:44,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:40:44,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1220380627, now seen corresponding path program 1 times [2020-10-26 21:40:44,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:40:44,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1310633497] [2020-10-26 21:40:44,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:40:44,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:40:44,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:40:46,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:40:49,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:40:49,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1087 [2020-10-26 21:40:49,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:40:49,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5174 [2020-10-26 21:40:49,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:40:49,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 21:40:49,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:40:49,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 21:40:49,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:40:49,854 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 21:40:49,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:40:49,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:40:49,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:40:49,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:40:49,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:40:49,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:40:49,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-26 21:40:49,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:40:49,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:40:49,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:40:49,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:40:49,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 21:40:49,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:40:50,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:40:50,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:40:50,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:40:50,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-26 21:40:50,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:40:50,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 209 [2020-10-26 21:40:50,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:40:50,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:40:50,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:40:50,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-26 21:40:50,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:40:51,179 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 21:40:51,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1310633497] [2020-10-26 21:40:51,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 21:40:51,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 21:40:51,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391002887] [2020-10-26 21:40:51,183 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 21:40:51,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:40:51,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 21:40:51,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 21:40:51,185 INFO L87 Difference]: Start difference. First operand 2020 states and 3054 transitions. Second operand 7 states. [2020-10-26 21:40:51,428 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-26 21:40:52,748 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-26 21:41:14,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:41:14,390 INFO L93 Difference]: Finished difference Result 4491 states and 7529 transitions. [2020-10-26 21:41:14,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 21:41:14,391 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1067 [2020-10-26 21:41:14,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:41:14,411 INFO L225 Difference]: With dead ends: 4491 [2020-10-26 21:41:14,411 INFO L226 Difference]: Without dead ends: 3231 [2020-10-26 21:41:14,416 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-26 21:41:14,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3231 states. [2020-10-26 21:41:14,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3231 to 3148. [2020-10-26 21:41:14,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3148 states. [2020-10-26 21:41:14,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3148 states to 3148 states and 4655 transitions. [2020-10-26 21:41:14,521 INFO L78 Accepts]: Start accepts. Automaton has 3148 states and 4655 transitions. Word has length 1067 [2020-10-26 21:41:14,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:41:14,522 INFO L481 AbstractCegarLoop]: Abstraction has 3148 states and 4655 transitions. [2020-10-26 21:41:14,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 21:41:14,522 INFO L276 IsEmpty]: Start isEmpty. Operand 3148 states and 4655 transitions. [2020-10-26 21:41:14,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1120 [2020-10-26 21:41:14,538 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:41:14,539 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-26 21:41:14,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 21:41:14,540 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:41:14,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:41:14,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1142403664, now seen corresponding path program 1 times [2020-10-26 21:41:14,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:41:14,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1871600202] [2020-10-26 21:41:14,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:41:15,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:41:15,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:41:16,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:41:20,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:41:20,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1139 [2020-10-26 21:41:20,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:41:20,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5108 [2020-10-26 21:41:20,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:41:20,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 21:41:20,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:41:20,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 552 [2020-10-26 21:41:20,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:41:22,867 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-10-26 21:41:23,076 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2020-10-26 21:41:23,272 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2020-10-26 21:41:23,433 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2020-10-26 21:41:23,571 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-10-26 21:41:23,900 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 67 [2020-10-26 21:41:24,217 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 72 [2020-10-26 21:41:24,625 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 76 [2020-10-26 21:41:25,053 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 72 [2020-10-26 21:41:25,451 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 67 [2020-10-26 21:41:25,671 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 21:41:25,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:41:25,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:41:25,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:41:25,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:41:25,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:41:25,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:41:25,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-26 21:41:25,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:41:25,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:41:25,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:41:25,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:41:25,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:41:25,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:41:25,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:41:25,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:41:26,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:41:26,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-26 21:41:26,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:41:26,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 448 [2020-10-26 21:41:26,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:41:26,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 21:41:26,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:41:26,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 123 [2020-10-26 21:41:26,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:41:36,013 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 21:41:36,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1871600202] [2020-10-26 21:41:36,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 21:41:36,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 21:41:36,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047898004] [2020-10-26 21:41:36,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 21:41:36,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:41:36,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 21:41:36,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2020-10-26 21:41:36,017 INFO L87 Difference]: Start difference. First operand 3148 states and 4655 transitions. Second operand 18 states. [2020-10-26 21:41:36,351 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-26 21:41:38,437 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 75 [2020-10-26 21:41:38,692 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2020-10-26 21:41:39,004 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 79 [2020-10-26 21:41:39,792 WARN L193 SmtUtils]: Spent 722.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 198 [2020-10-26 21:41:40,673 WARN L193 SmtUtils]: Spent 811.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 206 [2020-10-26 21:41:42,150 WARN L193 SmtUtils]: Spent 772.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 205 [2020-10-26 21:41:45,643 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 218 DAG size of output: 204 [2020-10-26 21:41:55,140 WARN L193 SmtUtils]: Spent 874.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 199 [2020-10-26 21:41:56,150 WARN L193 SmtUtils]: Spent 921.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 213 [2020-10-26 21:41:57,776 WARN L193 SmtUtils]: Spent 933.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 210 [2020-10-26 21:42:07,274 WARN L193 SmtUtils]: Spent 954.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 207 [2020-10-26 21:42:08,711 WARN L193 SmtUtils]: Spent 982.00 ms on a formula simplification. DAG size of input: 244 DAG size of output: 202 [2020-10-26 21:42:33,728 WARN L193 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 177 [2020-10-26 21:42:48,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:42:48,860 INFO L93 Difference]: Finished difference Result 9417 states and 15338 transitions. [2020-10-26 21:42:48,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-26 21:42:48,862 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 1119 [2020-10-26 21:42:48,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:42:48,901 INFO L225 Difference]: With dead ends: 9417 [2020-10-26 21:42:48,901 INFO L226 Difference]: Without dead ends: 7029 [2020-10-26 21:42:48,909 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=233, Invalid=823, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 21:42:48,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7029 states. [2020-10-26 21:42:49,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7029 to 6965. [2020-10-26 21:42:49,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6965 states. [2020-10-26 21:42:49,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6965 states to 6965 states and 9936 transitions. [2020-10-26 21:42:49,172 INFO L78 Accepts]: Start accepts. Automaton has 6965 states and 9936 transitions. Word has length 1119 [2020-10-26 21:42:49,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:42:49,173 INFO L481 AbstractCegarLoop]: Abstraction has 6965 states and 9936 transitions. [2020-10-26 21:42:49,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 21:42:49,173 INFO L276 IsEmpty]: Start isEmpty. Operand 6965 states and 9936 transitions. [2020-10-26 21:42:49,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1145 [2020-10-26 21:42:49,211 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:42:49,212 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-26 21:42:49,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 21:42:49,212 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:42:49,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:42:49,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1572230350, now seen corresponding path program 1 times [2020-10-26 21:42:49,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:42:49,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [113390606] [2020-10-26 21:42:49,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:42:49,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:42:49,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:42:50,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:42:54,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:42:54,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1166 [2020-10-26 21:42:54,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:42:54,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5169 [2020-10-26 21:42:54,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:42:54,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-26 21:42:54,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:42:54,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 891 [2020-10-26 21:42:54,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0