/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem04_label56.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 16:05:36,306 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 16:05:36,308 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 16:05:36,344 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 16:05:36,344 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 16:05:36,346 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 16:05:36,348 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 16:05:36,350 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 16:05:36,352 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 16:05:36,354 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 16:05:36,355 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 16:05:36,356 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 16:05:36,357 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 16:05:36,358 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 16:05:36,360 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 16:05:36,361 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 16:05:36,362 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 16:05:36,363 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 16:05:36,379 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 16:05:36,384 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 16:05:36,386 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 16:05:36,389 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 16:05:36,393 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 16:05:36,394 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 16:05:36,404 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 16:05:36,404 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 16:05:36,404 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 16:05:36,406 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 16:05:36,408 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 16:05:36,410 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 16:05:36,410 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 16:05:36,411 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 16:05:36,412 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 16:05:36,413 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 16:05:36,415 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 16:05:36,416 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 16:05:36,416 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 16:05:36,417 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 16:05:36,417 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 16:05:36,418 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 16:05:36,419 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 16:05:36,420 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 16:05:36,478 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 16:05:36,478 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 16:05:36,483 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 16:05:36,484 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 16:05:36,485 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 16:05:36,485 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 16:05:36,485 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 16:05:36,485 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 16:05:36,486 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 16:05:36,486 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 16:05:36,487 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 16:05:36,487 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 16:05:36,487 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 16:05:36,488 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 16:05:36,488 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 16:05:36,488 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 16:05:36,488 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 16:05:36,489 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 16:05:36,489 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 16:05:36,491 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 16:05:36,491 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 16:05:36,495 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 16:05:36,496 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 16:05:36,496 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 16:05:36,496 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 16:05:36,496 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 16:05:36,497 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 16:05:36,500 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 16:05:36,500 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 16:05:36,501 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 16:05:36,952 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 16:05:36,981 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 16:05:36,984 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 16:05:36,986 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 16:05:36,986 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 16:05:36,987 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem04_label56.c [2020-10-27 16:05:37,082 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c88cf36b7/9999fc7770c94ff1abc697d643283508/FLAGf1a48c05e [2020-10-27 16:05:38,104 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 16:05:38,104 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem04_label56.c [2020-10-27 16:05:38,142 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c88cf36b7/9999fc7770c94ff1abc697d643283508/FLAGf1a48c05e [2020-10-27 16:05:38,586 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c88cf36b7/9999fc7770c94ff1abc697d643283508 [2020-10-27 16:05:38,589 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 16:05:38,597 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 16:05:38,602 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 16:05:38,603 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 16:05:38,606 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 16:05:38,608 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 04:05:38" (1/1) ... [2020-10-27 16:05:38,613 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73e187d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:05:38, skipping insertion in model container [2020-10-27 16:05:38,614 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 04:05:38" (1/1) ... [2020-10-27 16:05:38,622 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 16:05:38,811 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 16:05:40,093 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 16:05:40,110 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 16:05:40,912 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 16:05:40,953 INFO L208 MainTranslator]: Completed translation [2020-10-27 16:05:40,955 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:05:40 WrapperNode [2020-10-27 16:05:40,955 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 16:05:40,956 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 16:05:40,956 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 16:05:40,957 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 16:05:40,972 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:05:40" (1/1) ... [2020-10-27 16:05:40,974 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:05:40" (1/1) ... [2020-10-27 16:05:41,047 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:05:40" (1/1) ... [2020-10-27 16:05:41,047 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:05:40" (1/1) ... [2020-10-27 16:05:41,203 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:05:40" (1/1) ... [2020-10-27 16:05:41,240 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:05:40" (1/1) ... [2020-10-27 16:05:41,281 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:05:40" (1/1) ... [2020-10-27 16:05:41,327 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 16:05:41,330 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 16:05:41,330 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 16:05:41,330 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 16:05:41,331 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:05:40" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 16:05:41,414 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 16:05:41,414 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 16:05:41,415 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 16:05:41,415 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 16:05:41,416 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 16:05:41,416 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-27 16:05:41,416 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-27 16:05:41,416 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 16:05:41,417 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 16:05:41,417 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 16:05:41,418 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-27 16:05:41,418 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-27 16:05:41,418 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 16:05:41,418 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 16:05:41,418 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 16:05:41,419 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 16:05:41,419 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 16:05:41,420 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 16:05:41,420 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 16:05:41,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 16:05:41,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 16:05:41,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 16:05:41,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 16:05:41,421 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 16:05:41,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 16:05:46,844 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 16:05:46,845 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 16:05:46,848 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 04:05:46 BoogieIcfgContainer [2020-10-27 16:05:46,848 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 16:05:46,850 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 16:05:46,850 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 16:05:46,854 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 16:05:46,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 04:05:38" (1/3) ... [2020-10-27 16:05:46,855 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72b56164 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 04:05:46, skipping insertion in model container [2020-10-27 16:05:46,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:05:40" (2/3) ... [2020-10-27 16:05:46,856 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72b56164 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 04:05:46, skipping insertion in model container [2020-10-27 16:05:46,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 04:05:46" (3/3) ... [2020-10-27 16:05:46,857 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem04_label56.c [2020-10-27 16:05:46,869 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 16:05:46,875 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 16:05:46,889 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 16:05:46,922 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 16:05:46,923 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 16:05:46,923 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 16:05:46,923 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 16:05:46,923 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 16:05:46,923 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 16:05:46,923 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 16:05:46,924 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 16:05:46,959 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states. [2020-10-27 16:05:47,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 814 [2020-10-27 16:05:47,018 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:05:47,020 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] [2020-10-27 16:05:47,020 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:05:47,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:05:47,028 INFO L82 PathProgramCache]: Analyzing trace with hash 578935168, now seen corresponding path program 1 times [2020-10-27 16:05:47,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:05:47,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [832592426] [2020-10-27 16:05:47,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:05:47,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:05:48,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:05:52,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:05:52,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 829 [2020-10-27 16:05:52,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:05:52,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-27 16:05:52,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:05:52,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 16:05:52,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 16:05:52,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 820 [2020-10-27 16:05:52,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 16:05:53,775 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-27 16:05:53,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:05:53,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:05:53,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:05:53,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:05:53,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:05:53,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:05:53,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-27 16:05:53,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:05:53,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:05:53,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:05:53,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 16:05:53,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:05:55,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 16:05:55,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [832592426] [2020-10-27 16:05:55,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 16:05:55,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 16:05:55,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667009196] [2020-10-27 16:05:55,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 16:05:55,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:05:55,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 16:05:55,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 16:05:55,206 INFO L87 Difference]: Start difference. First operand 910 states. Second operand 4 states. [2020-10-27 16:05:55,395 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-27 16:06:06,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:06:06,523 INFO L93 Difference]: Finished difference Result 2677 states and 5144 transitions. [2020-10-27 16:06:06,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 16:06:06,528 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 813 [2020-10-27 16:06:06,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:06:06,581 INFO L225 Difference]: With dead ends: 2677 [2020-10-27 16:06:06,581 INFO L226 Difference]: Without dead ends: 1703 [2020-10-27 16:06:06,595 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 16:06:06,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1703 states. [2020-10-27 16:06:06,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1703 to 1688. [2020-10-27 16:06:06,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1688 states. [2020-10-27 16:06:06,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1688 states to 1688 states and 2974 transitions. [2020-10-27 16:06:06,763 INFO L78 Accepts]: Start accepts. Automaton has 1688 states and 2974 transitions. Word has length 813 [2020-10-27 16:06:06,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:06:06,767 INFO L481 AbstractCegarLoop]: Abstraction has 1688 states and 2974 transitions. [2020-10-27 16:06:06,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 16:06:06,767 INFO L276 IsEmpty]: Start isEmpty. Operand 1688 states and 2974 transitions. [2020-10-27 16:06:06,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 823 [2020-10-27 16:06:06,796 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:06:06,797 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 16:06:06,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 16:06:06,798 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:06:06,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:06:06,800 INFO L82 PathProgramCache]: Analyzing trace with hash 71011579, now seen corresponding path program 1 times [2020-10-27 16:06:06,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:06:06,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [265543408] [2020-10-27 16:06:06,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:06:06,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:06:06,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:06:07,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:06:12,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:06:12,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 840 [2020-10-27 16:06:12,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 16:06:12,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5147 [2020-10-27 16:06:12,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:06:12,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 16:06:12,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 16:06:12,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 718 [2020-10-27 16:06:12,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-27 16:06:13,422 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2020-10-27 16:06:14,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:06:14,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:06:14,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:06:14,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:06:14,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:06:14,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:06:14,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 16:06:14,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:06:14,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:06:14,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:06:14,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:06:14,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:06:14,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 16:06:14,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:06:14,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:06:14,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:06:14,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 16:06:14,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:06:14,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 16:06:14,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:06:14,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:06:14,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:06:14,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 16:06:14,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:06:20,458 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 16:06:20,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [265543408] [2020-10-27 16:06:20,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 16:06:20,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 16:06:20,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993080191] [2020-10-27 16:06:20,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 16:06:20,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:06:20,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 16:06:20,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-10-27 16:06:20,464 INFO L87 Difference]: Start difference. First operand 1688 states and 2974 transitions. Second operand 19 states. [2020-10-27 16:06:20,900 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-27 16:06:21,149 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 16:06:25,669 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-27 16:06:28,341 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-10-27 16:06:28,600 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-27 16:06:29,546 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-10-27 16:06:32,206 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-27 16:06:35,721 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-10-27 16:06:35,943 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-27 16:06:37,472 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 117 [2020-10-27 16:06:40,841 WARN L193 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 115 [2020-10-27 16:06:43,292 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 109 [2020-10-27 16:06:43,647 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 111 [2020-10-27 16:06:45,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:06:45,951 INFO L93 Difference]: Finished difference Result 4094 states and 7390 transitions. [2020-10-27 16:06:45,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 16:06:45,953 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 822 [2020-10-27 16:06:45,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:06:45,968 INFO L225 Difference]: With dead ends: 4094 [2020-10-27 16:06:45,969 INFO L226 Difference]: Without dead ends: 2412 [2020-10-27 16:06:45,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=161, Invalid=831, Unknown=0, NotChecked=0, Total=992 [2020-10-27 16:06:45,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2020-10-27 16:06:46,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 2408. [2020-10-27 16:06:46,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2408 states. [2020-10-27 16:06:46,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2408 states to 2408 states and 3711 transitions. [2020-10-27 16:06:46,053 INFO L78 Accepts]: Start accepts. Automaton has 2408 states and 3711 transitions. Word has length 822 [2020-10-27 16:06:46,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:06:46,054 INFO L481 AbstractCegarLoop]: Abstraction has 2408 states and 3711 transitions. [2020-10-27 16:06:46,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 16:06:46,055 INFO L276 IsEmpty]: Start isEmpty. Operand 2408 states and 3711 transitions. [2020-10-27 16:06:46,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 834 [2020-10-27 16:06:46,094 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:06:46,095 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 16:06:46,095 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 16:06:46,096 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:06:46,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:06:46,097 INFO L82 PathProgramCache]: Analyzing trace with hash 865866934, now seen corresponding path program 1 times [2020-10-27 16:06:46,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:06:46,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [313537073] [2020-10-27 16:06:46,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:06:46,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:06:46,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:06:47,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:06:49,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:06:51,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:06:51,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 851 [2020-10-27 16:06:51,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 16:06:51,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5069 [2020-10-27 16:06:51,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:06:51,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 16:06:51,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-27 16:06:51,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 797 [2020-10-27 16:06:51,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:06:52,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:06:52,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:06:52,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:06:52,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:06:52,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:06:52,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:06:52,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 16:06:52,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:06:52,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:06:52,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:06:52,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:06:52,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:06:52,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 16:06:52,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:06:52,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:06:52,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:06:52,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-27 16:06:52,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:06:52,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-27 16:06:52,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:06:52,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:06:52,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:06:52,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 16:06:52,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:06:56,756 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 16:06:56,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [313537073] [2020-10-27 16:06:56,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 16:06:56,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 16:06:56,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764180815] [2020-10-27 16:06:56,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 16:06:56,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:06:56,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 16:06:56,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 16:06:56,759 INFO L87 Difference]: Start difference. First operand 2408 states and 3711 transitions. Second operand 6 states. [2020-10-27 16:06:57,167 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2020-10-27 16:07:11,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:07:11,066 INFO L93 Difference]: Finished difference Result 5602 states and 8981 transitions. [2020-10-27 16:07:11,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 16:07:11,067 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 833 [2020-10-27 16:07:11,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:07:11,085 INFO L225 Difference]: With dead ends: 5602 [2020-10-27 16:07:11,085 INFO L226 Difference]: Without dead ends: 2412 [2020-10-27 16:07:11,093 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 16:07:11,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2020-10-27 16:07:11,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 2408. [2020-10-27 16:07:11,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2408 states. [2020-10-27 16:07:11,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2408 states to 2408 states and 3709 transitions. [2020-10-27 16:07:11,163 INFO L78 Accepts]: Start accepts. Automaton has 2408 states and 3709 transitions. Word has length 833 [2020-10-27 16:07:11,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:07:11,164 INFO L481 AbstractCegarLoop]: Abstraction has 2408 states and 3709 transitions. [2020-10-27 16:07:11,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 16:07:11,164 INFO L276 IsEmpty]: Start isEmpty. Operand 2408 states and 3709 transitions. [2020-10-27 16:07:11,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 835 [2020-10-27 16:07:11,177 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:07:11,178 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 16:07:11,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 16:07:11,178 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:07:11,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:07:11,179 INFO L82 PathProgramCache]: Analyzing trace with hash 60816467, now seen corresponding path program 1 times [2020-10-27 16:07:11,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:07:11,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1565139759] [2020-10-27 16:07:11,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:07:11,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:07:11,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:07:12,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:07:15,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:07:16,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:07:16,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 852 [2020-10-27 16:07:16,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 16:07:16,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-27 16:07:16,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:07:16,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 16:07:16,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-27 16:07:16,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 817 [2020-10-27 16:07:16,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:07:16,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:07:16,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:07:16,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:07:16,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:07:16,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:07:16,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:07:16,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 16:07:16,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:07:16,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:07:16,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:07:16,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:07:16,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:07:16,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 16:07:16,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:07:16,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:07:16,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:07:16,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 16:07:16,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:07:16,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 16:07:16,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:07:16,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:07:16,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:07:16,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 16:07:16,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:07:17,453 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 16:07:17,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1565139759] [2020-10-27 16:07:17,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 16:07:17,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 16:07:17,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580937180] [2020-10-27 16:07:17,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 16:07:17,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:07:17,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 16:07:17,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 16:07:17,457 INFO L87 Difference]: Start difference. First operand 2408 states and 3709 transitions. Second operand 5 states. [2020-10-27 16:07:17,586 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-27 16:07:27,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:07:27,331 INFO L93 Difference]: Finished difference Result 6520 states and 10491 transitions. [2020-10-27 16:07:27,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 16:07:27,332 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 834 [2020-10-27 16:07:27,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:07:27,358 INFO L225 Difference]: With dead ends: 6520 [2020-10-27 16:07:27,358 INFO L226 Difference]: Without dead ends: 4118 [2020-10-27 16:07:27,366 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 16:07:27,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4118 states. [2020-10-27 16:07:27,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4118 to 4098. [2020-10-27 16:07:27,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4098 states. [2020-10-27 16:07:27,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4098 states to 4098 states and 6306 transitions. [2020-10-27 16:07:27,522 INFO L78 Accepts]: Start accepts. Automaton has 4098 states and 6306 transitions. Word has length 834 [2020-10-27 16:07:27,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:07:27,524 INFO L481 AbstractCegarLoop]: Abstraction has 4098 states and 6306 transitions. [2020-10-27 16:07:27,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 16:07:27,524 INFO L276 IsEmpty]: Start isEmpty. Operand 4098 states and 6306 transitions. [2020-10-27 16:07:27,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 840 [2020-10-27 16:07:27,541 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:07:27,542 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 16:07:27,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 16:07:27,542 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:07:27,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:07:27,543 INFO L82 PathProgramCache]: Analyzing trace with hash -987326302, now seen corresponding path program 1 times [2020-10-27 16:07:27,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:07:27,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [265038510] [2020-10-27 16:07:27,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:07:27,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:07:27,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:07:28,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:07:31,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:07:32,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:07:32,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 857 [2020-10-27 16:07:32,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 16:07:32,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-27 16:07:32,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:07:32,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 16:07:32,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-27 16:07:32,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 517 [2020-10-27 16:07:32,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:07:34,616 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 33 [2020-10-27 16:07:34,804 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 33 [2020-10-27 16:07:34,930 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 33 [2020-10-27 16:07:35,076 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2020-10-27 16:07:35,239 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 38 [2020-10-27 16:07:35,399 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2020-10-27 16:07:35,549 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 33 [2020-10-27 16:07:35,692 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 33 [2020-10-27 16:07:35,839 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 33 [2020-10-27 16:07:36,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:07:36,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:07:36,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:07:36,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:07:36,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:07:36,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:07:36,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 16:07:36,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:07:36,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:07:36,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:07:36,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:07:36,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:07:36,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 16:07:36,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:07:36,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:07:36,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:07:36,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 16:07:36,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:07:36,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-27 16:07:36,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:07:36,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:07:36,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:07:36,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 16:07:36,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 16:07:40,674 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 16:07:40,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [265038510] [2020-10-27 16:07:40,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 16:07:40,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 16:07:40,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30835114] [2020-10-27 16:07:40,676 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 16:07:40,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:07:40,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 16:07:40,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-10-27 16:07:40,677 INFO L87 Difference]: Start difference. First operand 4098 states and 6306 transitions. Second operand 17 states. [2020-10-27 16:07:41,580 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2020-10-27 16:07:41,829 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-27 16:07:49,183 WARN L193 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 126 [2020-10-27 16:07:50,741 WARN L193 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 118 [2020-10-27 16:07:51,289 WARN L193 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 130 [2020-10-27 16:07:51,832 WARN L193 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 126 [2020-10-27 16:07:52,691 WARN L193 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 127 [2020-10-27 16:07:54,970 WARN L193 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 127 [2020-10-27 16:08:01,380 WARN L193 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 121 [2020-10-27 16:08:02,115 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 108 [2020-10-27 16:08:02,491 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 112 [2020-10-27 16:08:10,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:08:10,945 INFO L93 Difference]: Finished difference Result 8720 states and 13681 transitions. [2020-10-27 16:08:10,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 16:08:10,946 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 839 [2020-10-27 16:08:10,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:08:10,972 INFO L225 Difference]: With dead ends: 8720 [2020-10-27 16:08:10,973 INFO L226 Difference]: Without dead ends: 4628 [2020-10-27 16:08:10,983 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=155, Invalid=657, Unknown=0, NotChecked=0, Total=812 [2020-10-27 16:08:10,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4628 states. [2020-10-27 16:08:11,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4628 to 4608. [2020-10-27 16:08:11,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4608 states. [2020-10-27 16:08:11,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4608 states to 4608 states and 6829 transitions. [2020-10-27 16:08:11,120 INFO L78 Accepts]: Start accepts. Automaton has 4608 states and 6829 transitions. Word has length 839 [2020-10-27 16:08:11,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:08:11,122 INFO L481 AbstractCegarLoop]: Abstraction has 4608 states and 6829 transitions. [2020-10-27 16:08:11,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 16:08:11,122 INFO L276 IsEmpty]: Start isEmpty. Operand 4608 states and 6829 transitions. [2020-10-27 16:08:11,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 880 [2020-10-27 16:08:11,142 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:08:11,143 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 16:08:11,144 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 16:08:11,144 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:08:11,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:08:11,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1114952464, now seen corresponding path program 1 times [2020-10-27 16:08:11,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:08:11,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1878445825] [2020-10-27 16:08:11,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:08:11,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:08:11,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:08:11,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:08:11,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:08:16,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:08:16,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 899 [2020-10-27 16:08:16,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 16:08:16,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5072 [2020-10-27 16:08:16,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:08:16,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 16:08:16,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 78 [2020-10-27 16:08:16,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 568 [2020-10-27 16:08:16,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:08:19,178 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 41 [2020-10-27 16:08:19,410 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 43 [2020-10-27 16:08:19,736 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 43 [2020-10-27 16:08:20,195 WARN L193 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 51 [2020-10-27 16:08:20,727 WARN L193 SmtUtils]: Spent 475.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 57 [2020-10-27 16:08:21,058 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 43 [2020-10-27 16:08:21,282 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 42 [2020-10-27 16:08:21,510 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 38 [2020-10-27 16:08:21,816 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 36 [2020-10-27 16:08:22,029 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 37 [2020-10-27 16:08:22,166 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2020-10-27 16:08:22,321 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2020-10-27 16:08:22,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:08:22,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:08:22,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:08:22,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:08:22,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:08:22,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:08:22,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 16:08:22,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:08:22,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:08:22,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:08:22,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:08:22,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:08:22,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 16:08:22,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:08:22,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:08:22,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:08:22,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 16:08:22,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:08:22,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 16:08:22,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:08:22,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:08:22,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:08:22,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:08:22,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:08:22,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-27 16:08:22,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:08:22,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:08:22,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:08:22,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 16:08:22,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:08:22,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-10-27 16:08:22,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:08:22,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:08:22,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:08:22,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 16:08:22,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:08:28,849 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 61 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-27 16:08:28,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1878445825] [2020-10-27 16:08:28,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 16:08:28,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 16:08:28,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109211998] [2020-10-27 16:08:28,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 16:08:28,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:08:28,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 16:08:28,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-10-27 16:08:28,853 INFO L87 Difference]: Start difference. First operand 4608 states and 6829 transitions. Second operand 17 states. [2020-10-27 16:08:30,385 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-27 16:08:30,685 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-27 16:08:32,526 WARN L193 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 134 [2020-10-27 16:08:33,929 WARN L193 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 140 [2020-10-27 16:08:39,524 WARN L193 SmtUtils]: Spent 464.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 133 [2020-10-27 16:08:40,462 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-10-27 16:08:40,736 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-27 16:08:45,406 WARN L193 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 125 [2020-10-27 16:08:46,249 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-27 16:08:49,654 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-10-27 16:08:49,917 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-27 16:08:57,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:08:57,718 INFO L93 Difference]: Finished difference Result 9795 states and 14835 transitions. [2020-10-27 16:08:57,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 16:08:57,719 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 879 [2020-10-27 16:08:57,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:08:57,743 INFO L225 Difference]: With dead ends: 9795 [2020-10-27 16:08:57,744 INFO L226 Difference]: Without dead ends: 5193 [2020-10-27 16:08:57,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=153, Invalid=603, Unknown=0, NotChecked=0, Total=756 [2020-10-27 16:08:57,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5193 states. [2020-10-27 16:08:57,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5193 to 5171. [2020-10-27 16:08:57,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5171 states. [2020-10-27 16:08:57,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5171 states to 5171 states and 7405 transitions. [2020-10-27 16:08:57,880 INFO L78 Accepts]: Start accepts. Automaton has 5171 states and 7405 transitions. Word has length 879 [2020-10-27 16:08:57,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:08:57,881 INFO L481 AbstractCegarLoop]: Abstraction has 5171 states and 7405 transitions. [2020-10-27 16:08:57,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 16:08:57,882 INFO L276 IsEmpty]: Start isEmpty. Operand 5171 states and 7405 transitions. [2020-10-27 16:08:57,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 894 [2020-10-27 16:08:57,900 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:08:57,901 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 16:08:57,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 16:08:57,902 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:08:57,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:08:57,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1885600786, now seen corresponding path program 1 times [2020-10-27 16:08:57,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:08:57,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [596455515] [2020-10-27 16:08:57,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:08:57,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:08:58,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:08:58,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:09:02,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:09:02,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 911 [2020-10-27 16:09:02,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 16:09:02,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 16:09:02,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:09:02,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 16:09:02,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 90 [2020-10-27 16:09:02,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 670 [2020-10-27 16:09:02,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:09:05,654 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2020-10-27 16:09:05,904 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2020-10-27 16:09:06,272 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 54 [2020-10-27 16:09:06,519 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 48 [2020-10-27 16:09:06,733 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 47 [2020-10-27 16:09:07,018 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 47 [2020-10-27 16:09:07,389 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 47 [2020-10-27 16:09:07,718 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 44 [2020-10-27 16:09:07,975 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 39 [2020-10-27 16:09:08,116 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-27 16:09:08,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:09:08,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:09:08,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:09:08,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:09:08,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:09:08,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:09:08,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 16:09:08,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:09:08,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:09:08,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:09:08,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:09:08,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:09:08,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 16:09:08,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:09:08,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:09:08,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:09:08,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 16:09:08,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:09:08,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-10-27 16:09:08,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:09:08,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:09:08,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:09:08,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-27 16:09:08,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0