/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/Problem05_label49.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 16:19:26,338 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 16:19:26,344 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 16:19:26,380 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 16:19:26,381 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 16:19:26,382 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 16:19:26,384 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 16:19:26,387 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 16:19:26,389 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 16:19:26,390 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 16:19:26,392 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 16:19:26,393 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 16:19:26,394 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 16:19:26,395 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 16:19:26,397 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 16:19:26,398 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 16:19:26,399 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 16:19:26,400 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 16:19:26,420 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 16:19:26,423 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 16:19:26,425 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 16:19:26,426 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 16:19:26,428 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 16:19:26,429 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 16:19:26,433 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 16:19:26,433 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 16:19:26,434 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 16:19:26,435 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 16:19:26,436 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 16:19:26,437 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 16:19:26,437 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 16:19:26,439 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 16:19:26,440 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 16:19:26,441 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 16:19:26,443 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 16:19:26,444 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 16:19:26,446 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 16:19:26,446 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 16:19:26,447 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 16:19:26,449 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 16:19:26,450 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 16:19:26,451 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 16:19:26,508 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 16:19:26,508 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 16:19:26,512 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 16:19:26,513 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 16:19:26,513 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 16:19:26,513 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 16:19:26,514 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 16:19:26,514 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 16:19:26,514 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 16:19:26,514 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 16:19:26,515 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 16:19:26,516 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 16:19:26,516 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 16:19:26,516 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 16:19:26,516 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 16:19:26,517 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 16:19:26,517 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 16:19:26,517 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 16:19:26,518 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 16:19:26,518 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 16:19:26,518 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 16:19:26,518 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 16:19:26,519 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 16:19:26,519 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 16:19:26,519 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 16:19:26,519 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 16:19:26,519 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 16:19:26,520 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 16:19:26,520 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 16:19:26,520 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 16:19:26,986 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 16:19:27,015 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 16:19:27,018 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 16:19:27,020 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 16:19:27,020 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 16:19:27,022 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem05_label49.c [2020-10-27 16:19:27,114 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d821bae94/9f01f4f5d8584e2abf43ed843dc345ea/FLAG98c9d80e4 [2020-10-27 16:19:28,390 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 16:19:28,391 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem05_label49.c [2020-10-27 16:19:28,429 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d821bae94/9f01f4f5d8584e2abf43ed843dc345ea/FLAG98c9d80e4 [2020-10-27 16:19:28,588 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d821bae94/9f01f4f5d8584e2abf43ed843dc345ea [2020-10-27 16:19:28,591 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 16:19:28,599 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 16:19:28,603 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 16:19:28,603 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 16:19:28,607 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 16:19:28,609 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 04:19:28" (1/1) ... [2020-10-27 16:19:28,613 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77505a42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:19:28, skipping insertion in model container [2020-10-27 16:19:28,613 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 04:19:28" (1/1) ... [2020-10-27 16:19:28,623 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 16:19:28,895 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 16:19:31,023 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 16:19:31,034 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 16:19:32,326 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 16:19:32,395 INFO L208 MainTranslator]: Completed translation [2020-10-27 16:19:32,396 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:19:32 WrapperNode [2020-10-27 16:19:32,396 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 16:19:32,397 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 16:19:32,397 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 16:19:32,397 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 16:19:32,411 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:19:32" (1/1) ... [2020-10-27 16:19:32,411 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:19:32" (1/1) ... [2020-10-27 16:19:32,504 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:19:32" (1/1) ... [2020-10-27 16:19:32,505 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:19:32" (1/1) ... [2020-10-27 16:19:32,796 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:19:32" (1/1) ... [2020-10-27 16:19:32,848 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:19:32" (1/1) ... [2020-10-27 16:19:33,016 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:19:32" (1/1) ... [2020-10-27 16:19:33,082 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 16:19:33,083 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 16:19:33,084 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 16:19:33,084 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 16:19:33,085 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:19:32" (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 16:19:33,161 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 16:19:33,161 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 16:19:33,162 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 16:19:33,162 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 16:19:33,162 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 16:19:33,162 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-27 16:19:33,162 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-27 16:19:33,162 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-27 16:19:33,162 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-27 16:19:33,163 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output7 [2020-10-27 16:19:33,163 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output8 [2020-10-27 16:19:33,163 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 16:19:33,163 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 16:19:33,163 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 16:19:33,163 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-27 16:19:33,164 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-27 16:19:33,164 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-27 16:19:33,164 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-27 16:19:33,164 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output7 [2020-10-27 16:19:33,164 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output8 [2020-10-27 16:19:33,164 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 16:19:33,164 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 16:19:33,165 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 16:19:33,165 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 16:19:33,165 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 16:19:33,165 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 16:19:33,165 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 16:19:33,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 16:19:33,165 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 16:19:33,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 16:19:33,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 16:19:33,166 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 16:19:33,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 16:19:43,513 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 16:19:43,514 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 16:19:43,519 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 04:19:43 BoogieIcfgContainer [2020-10-27 16:19:43,520 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 16:19:43,522 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 16:19:43,522 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 16:19:43,526 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 16:19:43,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 04:19:28" (1/3) ... [2020-10-27 16:19:43,527 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f0c9445 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 04:19:43, skipping insertion in model container [2020-10-27 16:19:43,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:19:32" (2/3) ... [2020-10-27 16:19:43,528 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f0c9445 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 04:19:43, skipping insertion in model container [2020-10-27 16:19:43,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 04:19:43" (3/3) ... [2020-10-27 16:19:43,530 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label49.c [2020-10-27 16:19:43,543 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 16:19:43,550 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 16:19:43,564 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 16:19:43,603 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 16:19:43,603 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 16:19:43,603 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 16:19:43,603 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 16:19:43,604 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 16:19:43,604 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 16:19:43,604 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 16:19:43,604 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 16:19:43,660 INFO L276 IsEmpty]: Start isEmpty. Operand 2226 states. [2020-10-27 16:19:43,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1699 [2020-10-27 16:19:43,809 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:19:43,812 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, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:19:43,813 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:19:43,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:19:43,822 INFO L82 PathProgramCache]: Analyzing trace with hash 178697167, now seen corresponding path program 1 times [2020-10-27 16:19:43,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:19:43,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [848859614] [2020-10-27 16:19:43,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:19:45,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:19:45,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:19:50,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:19:50,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1722 [2020-10-27 16:19:50,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:19:50,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5251 [2020-10-27 16:19:50,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:19:50,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 16:19:50,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 16:19:50,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1713 [2020-10-27 16:19:50,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 16:19:52,143 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-10-27 16:19:52,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:19:52,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:19:52,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:19:52,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:19:52,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:19:52,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:19:52,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-27 16:19:52,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:19:52,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:19:52,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:19:52,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 16:19:52,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:19:55,917 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 16:19:55,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [848859614] [2020-10-27 16:19:55,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 16:19:55,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 16:19:55,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258539368] [2020-10-27 16:19:55,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 16:19:55,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:19:55,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 16:19:55,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 16:19:55,947 INFO L87 Difference]: Start difference. First operand 2226 states. Second operand 5 states. [2020-10-27 16:19:56,128 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-10-27 16:20:20,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:20:20,475 INFO L93 Difference]: Finished difference Result 6365 states and 11965 transitions. [2020-10-27 16:20:20,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 16:20:20,477 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 1698 [2020-10-27 16:20:20,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:20:20,529 INFO L225 Difference]: With dead ends: 6365 [2020-10-27 16:20:20,529 INFO L226 Difference]: Without dead ends: 4075 [2020-10-27 16:20:20,543 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 16:20:20,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4075 states. [2020-10-27 16:20:20,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4075 to 3987. [2020-10-27 16:20:20,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3987 states. [2020-10-27 16:20:20,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3987 states to 3987 states and 7373 transitions. [2020-10-27 16:20:20,770 INFO L78 Accepts]: Start accepts. Automaton has 3987 states and 7373 transitions. Word has length 1698 [2020-10-27 16:20:20,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:20:20,774 INFO L481 AbstractCegarLoop]: Abstraction has 3987 states and 7373 transitions. [2020-10-27 16:20:20,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 16:20:20,775 INFO L276 IsEmpty]: Start isEmpty. Operand 3987 states and 7373 transitions. [2020-10-27 16:20:20,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1709 [2020-10-27 16:20:20,959 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:20:20,961 INFO L422 BasicCegarLoop]: trace histogram [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, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:20:20,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 16:20:20,964 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:20:20,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:20:20,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1570470449, now seen corresponding path program 1 times [2020-10-27 16:20:20,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:20:20,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1740389202] [2020-10-27 16:20:20,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:20:21,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:20:21,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:20:23,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:20:26,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:20:26,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1734 [2020-10-27 16:20:26,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 16:20:26,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 16:20:26,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:20:26,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 16:20:26,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 16:20:26,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1710 [2020-10-27 16:20:26,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 16:20:28,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:20:28,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:20:28,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:20:28,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:20:28,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:20:28,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:20:28,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 16:20:28,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:20:28,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:20:28,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:20:28,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:20:28,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:20:28,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 16:20:28,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:20:28,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:20:28,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:20:28,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-27 16:20:28,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:20:28,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-27 16:20:28,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:20:28,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:20:28,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:20:28,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 16:20:28,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:20:30,894 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 16:20:30,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1740389202] [2020-10-27 16:20:30,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 16:20:30,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 16:20:30,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025544532] [2020-10-27 16:20:30,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 16:20:30,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:20:30,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 16:20:30,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 16:20:30,901 INFO L87 Difference]: Start difference. First operand 3987 states and 7373 transitions. Second operand 5 states. [2020-10-27 16:20:57,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:20:57,943 INFO L93 Difference]: Finished difference Result 11577 states and 21655 transitions. [2020-10-27 16:20:57,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 16:20:57,944 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 1708 [2020-10-27 16:20:57,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:20:57,992 INFO L225 Difference]: With dead ends: 11577 [2020-10-27 16:20:57,992 INFO L226 Difference]: Without dead ends: 7596 [2020-10-27 16:20:58,005 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 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 16:20:58,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7596 states. [2020-10-27 16:20:58,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7596 to 7586. [2020-10-27 16:20:58,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7586 states. [2020-10-27 16:20:58,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7586 states to 7586 states and 12131 transitions. [2020-10-27 16:20:58,293 INFO L78 Accepts]: Start accepts. Automaton has 7586 states and 12131 transitions. Word has length 1708 [2020-10-27 16:20:58,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:20:58,297 INFO L481 AbstractCegarLoop]: Abstraction has 7586 states and 12131 transitions. [2020-10-27 16:20:58,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 16:20:58,297 INFO L276 IsEmpty]: Start isEmpty. Operand 7586 states and 12131 transitions. [2020-10-27 16:20:58,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1714 [2020-10-27 16:20:58,442 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:20:58,444 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:20:58,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 16:20:58,445 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:20:58,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:20:58,450 INFO L82 PathProgramCache]: Analyzing trace with hash 872557240, now seen corresponding path program 1 times [2020-10-27 16:20:58,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:20:58,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1977173492] [2020-10-27 16:20:58,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:20:58,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:20:58,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:20:58,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:21:03,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:21:03,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1739 [2020-10-27 16:21:03,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 16:21:03,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5307 [2020-10-27 16:21:03,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:21:03,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 16:21:03,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-27 16:21:03,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1294 [2020-10-27 16:21:03,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:21:08,283 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2020-10-27 16:21:08,401 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2020-10-27 16:21:08,878 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2020-10-27 16:21:09,042 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2020-10-27 16:21:09,193 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 34 [2020-10-27 16:21:09,393 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 32 [2020-10-27 16:21:10,178 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 38 [2020-10-27 16:21:10,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:21:10,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:21:10,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:21:10,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:21:10,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:21:10,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:21:10,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 16:21:10,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:21:10,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:21:10,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:21:10,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:21:10,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:21:10,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 16:21:10,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:21:10,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:21:10,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:21:10,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-27 16:21:10,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:21:10,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 16:21:10,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:21:10,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:21:10,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:21:10,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 16:21:10,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:21:30,076 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 16:21:30,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1977173492] [2020-10-27 16:21:30,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 16:21:30,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 16:21:30,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271318267] [2020-10-27 16:21:30,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 16:21:30,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:21:30,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 16:21:30,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2020-10-27 16:21:30,082 INFO L87 Difference]: Start difference. First operand 7586 states and 12131 transitions. Second operand 23 states. [2020-10-27 16:21:30,568 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-10-27 16:21:30,840 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2020-10-27 16:21:31,961 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-10-27 16:21:38,070 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-10-27 16:21:38,321 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2020-10-27 16:21:45,025 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-10-27 16:21:45,250 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2020-10-27 16:21:49,044 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 104 [2020-10-27 16:21:49,550 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-10-27 16:21:52,655 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-10-27 16:21:52,872 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-10-27 16:21:59,686 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-10-27 16:21:59,903 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-10-27 16:22:01,851 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 102 [2020-10-27 16:22:03,698 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 99 [2020-10-27 16:22:07,363 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-27 16:22:07,563 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-10-27 16:22:08,760 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-27 16:22:16,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:22:16,800 INFO L93 Difference]: Finished difference Result 16459 states and 26889 transitions. [2020-10-27 16:22:16,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 16:22:16,801 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 1713 [2020-10-27 16:22:16,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:22:16,849 INFO L225 Difference]: With dead ends: 16459 [2020-10-27 16:22:16,849 INFO L226 Difference]: Without dead ends: 8879 [2020-10-27 16:22:16,870 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=212, Invalid=1428, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 16:22:16,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8879 states. [2020-10-27 16:22:17,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8879 to 8872. [2020-10-27 16:22:17,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8872 states. [2020-10-27 16:22:17,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8872 states to 8872 states and 13447 transitions. [2020-10-27 16:22:17,121 INFO L78 Accepts]: Start accepts. Automaton has 8872 states and 13447 transitions. Word has length 1713 [2020-10-27 16:22:17,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:22:17,124 INFO L481 AbstractCegarLoop]: Abstraction has 8872 states and 13447 transitions. [2020-10-27 16:22:17,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 16:22:17,124 INFO L276 IsEmpty]: Start isEmpty. Operand 8872 states and 13447 transitions. [2020-10-27 16:22:17,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1725 [2020-10-27 16:22:17,179 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:22:17,181 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:22:17,181 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 16:22:17,181 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:22:17,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:22:17,182 INFO L82 PathProgramCache]: Analyzing trace with hash 905100033, now seen corresponding path program 1 times [2020-10-27 16:22:17,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:22:17,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [999326847] [2020-10-27 16:22:17,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:22:17,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:22:17,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:22:17,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:22:22,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:22:22,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1750 [2020-10-27 16:22:22,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 16:22:22,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-27 16:22:22,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:22:22,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-27 16:22:22,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-27 16:22:22,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1426 [2020-10-27 16:22:22,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:22:25,929 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 32 [2020-10-27 16:22:26,072 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 32 [2020-10-27 16:22:26,222 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 32 [2020-10-27 16:22:26,416 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 32 [2020-10-27 16:22:26,570 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 32 [2020-10-27 16:22:26,728 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 32 [2020-10-27 16:22:26,940 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 32 [2020-10-27 16:22:27,127 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2020-10-27 16:22:27,288 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2020-10-27 16:22:27,500 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 33 [2020-10-27 16:22:27,762 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 34 [2020-10-27 16:22:27,988 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 36 [2020-10-27 16:22:28,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:22:28,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:22:28,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:22:28,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:22:28,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:22:28,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:22:28,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 16:22:28,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:22:28,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:22:28,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:22:28,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:22:28,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:22:28,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 16:22:28,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:22:29,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:22:29,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:22:29,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 16:22:29,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:22:29,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-27 16:22:29,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:22:29,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:22:29,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:22:29,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 16:22:29,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:22:49,895 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 16:22:49,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [999326847] [2020-10-27 16:22:49,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 16:22:49,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 16:22:49,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912051150] [2020-10-27 16:22:49,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 16:22:49,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:22:49,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 16:22:49,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2020-10-27 16:22:49,899 INFO L87 Difference]: Start difference. First operand 8872 states and 13447 transitions. Second operand 25 states. [2020-10-27 16:22:50,480 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-10-27 16:22:50,701 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2020-10-27 16:22:57,786 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-10-27 16:22:58,011 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2020-10-27 16:23:05,125 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-10-27 16:23:05,354 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2020-10-27 16:23:12,080 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 109