/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem19_label17.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 00:41:36,294 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 00:41:36,299 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 00:41:36,363 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 00:41:36,364 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 00:41:36,371 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 00:41:36,374 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 00:41:36,379 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 00:41:36,383 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 00:41:36,390 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 00:41:36,391 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 00:41:36,393 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 00:41:36,394 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 00:41:36,398 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 00:41:36,400 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 00:41:36,403 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 00:41:36,404 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 00:41:36,408 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 00:41:36,417 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 00:41:36,422 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 00:41:36,424 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 00:41:36,428 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 00:41:36,429 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 00:41:36,430 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 00:41:36,433 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 00:41:36,434 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 00:41:36,434 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 00:41:36,435 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 00:41:36,436 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 00:41:36,437 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 00:41:36,438 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 00:41:36,439 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 00:41:36,440 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 00:41:36,441 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 00:41:36,453 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 00:41:36,454 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 00:41:36,455 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 00:41:36,455 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 00:41:36,455 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 00:41:36,457 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 00:41:36,458 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 00:41:36,459 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 00:41:36,487 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 00:41:36,488 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 00:41:36,490 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 00:41:36,490 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 00:41:36,490 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 00:41:36,490 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 00:41:36,491 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 00:41:36,491 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 00:41:36,491 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 00:41:36,491 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 00:41:36,492 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 00:41:36,492 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 00:41:36,492 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 00:41:36,492 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 00:41:36,492 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 00:41:36,493 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 00:41:36,493 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 00:41:36,493 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 00:41:36,493 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 00:41:36,493 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 00:41:36,494 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 00:41:36,494 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 00:41:36,494 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 00:41:36,495 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 00:41:36,495 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 00:41:36,495 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 00:41:36,495 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 00:41:36,495 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 00:41:36,496 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 00:41:36,496 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 00:41:36,995 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 00:41:37,042 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 00:41:37,046 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 00:41:37,048 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 00:41:37,048 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 00:41:37,050 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label17.c [2020-10-27 00:41:37,151 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/62c2fb968/e23b603e646947e0b8157bbf9d392873/FLAG68f23e26b [2020-10-27 00:41:38,627 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 00:41:38,627 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label17.c [2020-10-27 00:41:38,693 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/62c2fb968/e23b603e646947e0b8157bbf9d392873/FLAG68f23e26b [2020-10-27 00:41:38,750 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/62c2fb968/e23b603e646947e0b8157bbf9d392873 [2020-10-27 00:41:38,754 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 00:41:38,762 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 00:41:38,766 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 00:41:38,767 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 00:41:38,771 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 00:41:38,773 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:41:38" (1/1) ... [2020-10-27 00:41:38,777 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@143dd075 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:41:38, skipping insertion in model container [2020-10-27 00:41:38,778 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:41:38" (1/1) ... [2020-10-27 00:41:38,787 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 00:41:39,013 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 00:41:41,110 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:41:41,125 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 00:41:42,336 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:41:42,397 INFO L208 MainTranslator]: Completed translation [2020-10-27 00:41:42,397 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:41:42 WrapperNode [2020-10-27 00:41:42,398 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 00:41:42,399 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 00:41:42,399 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 00:41:42,400 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 00:41:42,417 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:41:42" (1/1) ... [2020-10-27 00:41:42,419 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:41:42" (1/1) ... [2020-10-27 00:41:42,623 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:41:42" (1/1) ... [2020-10-27 00:41:42,623 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:41:42" (1/1) ... [2020-10-27 00:41:42,830 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:41:42" (1/1) ... [2020-10-27 00:41:42,890 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:41:42" (1/1) ... [2020-10-27 00:41:42,945 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:41:42" (1/1) ... [2020-10-27 00:41:43,140 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 00:41:43,142 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 00:41:43,143 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 00:41:43,143 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 00:41:43,145 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:41:42" (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 00:41:43,243 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 00:41:43,244 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 00:41:43,244 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 00:41:43,244 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 00:41:43,244 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 00:41:43,244 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-27 00:41:43,245 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-27 00:41:43,245 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-27 00:41:43,245 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-27 00:41:43,245 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 00:41:43,245 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 00:41:43,246 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 00:41:43,246 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-27 00:41:43,246 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-27 00:41:43,246 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-27 00:41:43,246 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-27 00:41:43,247 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 00:41:43,247 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 00:41:43,247 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 00:41:43,247 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 00:41:43,247 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 00:41:43,247 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 00:41:43,248 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 00:41:43,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 00:41:43,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 00:41:43,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 00:41:43,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 00:41:43,249 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 00:41:43,249 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 00:42:00,591 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 00:42:00,593 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 00:42:00,599 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:42:00 BoogieIcfgContainer [2020-10-27 00:42:00,599 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 00:42:00,606 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 00:42:00,606 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 00:42:00,610 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 00:42:00,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 12:41:38" (1/3) ... [2020-10-27 00:42:00,612 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@242effc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:42:00, skipping insertion in model container [2020-10-27 00:42:00,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:41:42" (2/3) ... [2020-10-27 00:42:00,612 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@242effc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:42:00, skipping insertion in model container [2020-10-27 00:42:00,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:42:00" (3/3) ... [2020-10-27 00:42:00,614 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label17.c [2020-10-27 00:42:00,627 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 00:42:00,634 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 00:42:00,648 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 00:42:00,689 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 00:42:00,689 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 00:42:00,689 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 00:42:00,690 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 00:42:00,690 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 00:42:00,690 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 00:42:00,690 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 00:42:00,690 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 00:42:00,751 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states. [2020-10-27 00:42:00,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 00:42:00,758 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:42:00,759 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:42:00,760 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:42:00,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:42:00,767 INFO L82 PathProgramCache]: Analyzing trace with hash -796377282, now seen corresponding path program 1 times [2020-10-27 00:42:00,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:42:00,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [959061121] [2020-10-27 00:42:00,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:42:01,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:42:01,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:42:01,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:42:01,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 00:42:01,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:42:01,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 517 [2020-10-27 00:42:01,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:42:01,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:42:01,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:42:01,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 00:42:01,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-27 00:42:01,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:42:01,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:42:01,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:42:01,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:42:01,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:42:01,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:42:01,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-27 00:42:01,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:42:01,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:42:01,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:42:01,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:42:01,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:42:01,786 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 00:42:01,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [959061121] [2020-10-27 00:42:01,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:42:01,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 00:42:01,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296792724] [2020-10-27 00:42:01,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 00:42:01,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:42:01,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 00:42:01,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 00:42:01,818 INFO L87 Difference]: Start difference. First operand 1781 states. Second operand 4 states. [2020-10-27 00:42:34,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:42:34,530 INFO L93 Difference]: Finished difference Result 5116 states and 9607 transitions. [2020-10-27 00:42:34,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 00:42:34,535 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-27 00:42:34,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:42:34,596 INFO L225 Difference]: With dead ends: 5116 [2020-10-27 00:42:34,597 INFO L226 Difference]: Without dead ends: 3271 [2020-10-27 00:42:34,618 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 00:42:34,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3271 states. [2020-10-27 00:42:34,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3271 to 3200. [2020-10-27 00:42:34,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3200 states. [2020-10-27 00:42:34,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3200 states to 3200 states and 5484 transitions. [2020-10-27 00:42:34,881 INFO L78 Accepts]: Start accepts. Automaton has 3200 states and 5484 transitions. Word has length 17 [2020-10-27 00:42:34,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:42:34,882 INFO L481 AbstractCegarLoop]: Abstraction has 3200 states and 5484 transitions. [2020-10-27 00:42:34,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 00:42:34,882 INFO L276 IsEmpty]: Start isEmpty. Operand 3200 states and 5484 transitions. [2020-10-27 00:42:34,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-27 00:42:34,887 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:42:34,887 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 00:42:34,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 00:42:34,888 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:42:34,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:42:34,889 INFO L82 PathProgramCache]: Analyzing trace with hash 110325081, now seen corresponding path program 1 times [2020-10-27 00:42:34,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:42:34,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [176430050] [2020-10-27 00:42:34,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:42:34,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:42:34,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:42:35,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:42:36,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:42:36,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-27 00:42:36,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:42:36,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1191 [2020-10-27 00:42:36,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:42:36,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:42:36,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:42:36,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-27 00:42:36,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:42:36,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:42:36,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:42:36,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:42:36,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:42:36,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:42:36,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:42:36,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 00:42:36,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:42:36,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:42:36,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:42:36,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:42:36,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-27 00:42:36,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:42:36,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:42:36,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:42:36,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:42:36,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 00:42:36,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:42:36,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 243 [2020-10-27 00:42:36,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:42:36,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:42:36,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:42:36,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-27 00:42:36,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:42:36,747 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:42:36,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [176430050] [2020-10-27 00:42:36,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:42:36,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 00:42:36,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447762428] [2020-10-27 00:42:36,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:42:36,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:42:36,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:42:36,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:42:36,757 INFO L87 Difference]: Start difference. First operand 3200 states and 5484 transitions. Second operand 7 states. [2020-10-27 00:43:28,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:43:28,984 INFO L93 Difference]: Finished difference Result 9569 states and 16489 transitions. [2020-10-27 00:43:28,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 00:43:28,991 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 89 [2020-10-27 00:43:28,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:43:29,027 INFO L225 Difference]: With dead ends: 9569 [2020-10-27 00:43:29,027 INFO L226 Difference]: Without dead ends: 6375 [2020-10-27 00:43:29,037 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-27 00:43:29,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6375 states. [2020-10-27 00:43:29,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6375 to 6256. [2020-10-27 00:43:29,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6256 states. [2020-10-27 00:43:29,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6256 states to 6256 states and 10366 transitions. [2020-10-27 00:43:29,250 INFO L78 Accepts]: Start accepts. Automaton has 6256 states and 10366 transitions. Word has length 89 [2020-10-27 00:43:29,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:43:29,251 INFO L481 AbstractCegarLoop]: Abstraction has 6256 states and 10366 transitions. [2020-10-27 00:43:29,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:43:29,251 INFO L276 IsEmpty]: Start isEmpty. Operand 6256 states and 10366 transitions. [2020-10-27 00:43:29,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-27 00:43:29,258 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:43:29,259 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 00:43:29,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 00:43:29,259 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:43:29,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:43:29,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1907779974, now seen corresponding path program 1 times [2020-10-27 00:43:29,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:43:29,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [105130362] [2020-10-27 00:43:29,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:43:29,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:43:29,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:43:29,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:43:30,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:43:30,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:43:30,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-27 00:43:30,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:43:30,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 961 [2020-10-27 00:43:30,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:43:30,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 00:43:30,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:43:30,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-27 00:43:30,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:43:30,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:43:30,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:43:30,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:43:30,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:43:30,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:43:30,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:43:30,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 00:43:30,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:43:30,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:43:30,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:43:30,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:43:30,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:43:30,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:43:30,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:43:30,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:43:30,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:43:30,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:43:30,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 00:43:30,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:43:30,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 303 [2020-10-27 00:43:30,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:43:30,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:43:30,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:43:30,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 00:43:30,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:43:30,887 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 00:43:30,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [105130362] [2020-10-27 00:43:30,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:43:30,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 00:43:30,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511462018] [2020-10-27 00:43:30,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:43:30,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:43:30,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:43:30,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:43:30,892 INFO L87 Difference]: Start difference. First operand 6256 states and 10366 transitions. Second operand 7 states. [2020-10-27 00:44:36,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:44:36,089 INFO L93 Difference]: Finished difference Result 24230 states and 41384 transitions. [2020-10-27 00:44:36,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 00:44:36,093 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 92 [2020-10-27 00:44:36,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:44:36,295 INFO L225 Difference]: With dead ends: 24230 [2020-10-27 00:44:36,296 INFO L226 Difference]: Without dead ends: 17980 [2020-10-27 00:44:36,321 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-10-27 00:44:36,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17980 states. [2020-10-27 00:44:36,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17980 to 17883. [2020-10-27 00:44:36,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17883 states. [2020-10-27 00:44:36,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17883 states to 17883 states and 27774 transitions. [2020-10-27 00:44:36,922 INFO L78 Accepts]: Start accepts. Automaton has 17883 states and 27774 transitions. Word has length 92 [2020-10-27 00:44:36,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:44:36,923 INFO L481 AbstractCegarLoop]: Abstraction has 17883 states and 27774 transitions. [2020-10-27 00:44:36,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:44:36,926 INFO L276 IsEmpty]: Start isEmpty. Operand 17883 states and 27774 transitions. [2020-10-27 00:44:36,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-27 00:44:36,937 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:44:36,938 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 00:44:36,940 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 00:44:36,940 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:44:36,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:44:36,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1255077192, now seen corresponding path program 1 times [2020-10-27 00:44:36,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:44:36,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [657600296] [2020-10-27 00:44:36,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:44:37,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:44:37,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:44:37,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:44:38,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:44:38,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-27 00:44:38,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:44:38,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1121 [2020-10-27 00:44:38,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:44:38,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:44:38,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:44:38,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-27 00:44:38,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:44:38,338 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 00:44:38,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:44:38,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:44:38,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:44:38,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:44:38,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:44:38,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:44:38,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 00:44:38,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:44:38,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:44:38,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:44:38,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:44:38,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:44:38,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:44:38,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:44:38,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:44:38,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:44:38,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-27 00:44:38,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:44:38,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 238 [2020-10-27 00:44:38,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:44:38,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:44:38,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:44:38,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-27 00:44:38,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:44:38,930 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:44:38,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [657600296] [2020-10-27 00:44:38,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:44:38,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 00:44:38,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547379237] [2020-10-27 00:44:38,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:44:38,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:44:38,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:44:38,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:44:38,933 INFO L87 Difference]: Start difference. First operand 17883 states and 27774 transitions. Second operand 7 states. [2020-10-27 00:44:39,099 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-27 00:44:43,301 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 00:45:41,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:45:41,320 INFO L93 Difference]: Finished difference Result 54513 states and 87244 transitions. [2020-10-27 00:45:41,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 00:45:41,328 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 118 [2020-10-27 00:45:41,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:45:41,485 INFO L225 Difference]: With dead ends: 54513 [2020-10-27 00:45:41,486 INFO L226 Difference]: Without dead ends: 36636 [2020-10-27 00:45:41,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 00:45:41,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36636 states.