./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem13_label07.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem13_label07.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c6eeba0e1c333b0671bbfcf3662adf7139859c1a965a716dd9b28c849af19818 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-20 23:51:25,648 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 23:51:25,650 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 23:51:25,689 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 23:51:25,689 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 23:51:25,691 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 23:51:25,698 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 23:51:25,702 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 23:51:25,704 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 23:51:25,710 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 23:51:25,712 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 23:51:25,716 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 23:51:25,717 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 23:51:25,719 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 23:51:25,720 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 23:51:25,721 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 23:51:25,723 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 23:51:25,724 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 23:51:25,728 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 23:51:25,730 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 23:51:25,735 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 23:51:25,736 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 23:51:25,737 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 23:51:25,738 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 23:51:25,740 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 23:51:25,746 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 23:51:25,746 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 23:51:25,746 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 23:51:25,747 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 23:51:25,748 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 23:51:25,748 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 23:51:25,749 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 23:51:25,750 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 23:51:25,751 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 23:51:25,753 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 23:51:25,754 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 23:51:25,754 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 23:51:25,755 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 23:51:25,755 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 23:51:25,755 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 23:51:25,756 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 23:51:25,757 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 23:51:25,758 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-20 23:51:25,801 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 23:51:25,802 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 23:51:25,803 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 23:51:25,803 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 23:51:25,804 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 23:51:25,804 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 23:51:25,805 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 23:51:25,805 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 23:51:25,805 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 23:51:25,806 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 23:51:25,806 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 23:51:25,806 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 23:51:25,807 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 23:51:25,807 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 23:51:25,807 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-20 23:51:25,807 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 23:51:25,807 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-20 23:51:25,807 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 23:51:25,808 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-20 23:51:25,808 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 23:51:25,808 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-20 23:51:25,808 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 23:51:25,808 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 23:51:25,809 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 23:51:25,809 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 23:51:25,809 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 23:51:25,809 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 23:51:25,809 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-20 23:51:25,810 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 23:51:25,810 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 23:51:25,810 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-20 23:51:25,810 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-20 23:51:25,811 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-20 23:51:25,811 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/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c6eeba0e1c333b0671bbfcf3662adf7139859c1a965a716dd9b28c849af19818 [2022-07-20 23:51:26,172 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 23:51:26,200 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 23:51:26,202 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 23:51:26,203 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 23:51:26,204 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 23:51:26,205 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label07.c [2022-07-20 23:51:26,260 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86bc9857e/524bd3e9f37f4274993c099d3c4df130/FLAG1cc05f026 [2022-07-20 23:51:27,014 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 23:51:27,015 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label07.c [2022-07-20 23:51:27,045 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86bc9857e/524bd3e9f37f4274993c099d3c4df130/FLAG1cc05f026 [2022-07-20 23:51:27,128 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86bc9857e/524bd3e9f37f4274993c099d3c4df130 [2022-07-20 23:51:27,131 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 23:51:27,132 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 23:51:27,133 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 23:51:27,134 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 23:51:27,153 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 23:51:27,155 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:51:27" (1/1) ... [2022-07-20 23:51:27,156 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d5cf265 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:51:27, skipping insertion in model container [2022-07-20 23:51:27,156 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:51:27" (1/1) ... [2022-07-20 23:51:27,163 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 23:51:27,281 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 23:51:27,500 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label07.c[3249,3262] [2022-07-20 23:51:28,339 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 23:51:28,346 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 23:51:28,372 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label07.c[3249,3262] [2022-07-20 23:51:28,984 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 23:51:29,019 INFO L208 MainTranslator]: Completed translation [2022-07-20 23:51:29,020 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:51:29 WrapperNode [2022-07-20 23:51:29,020 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 23:51:29,021 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 23:51:29,021 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 23:51:29,021 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 23:51:29,027 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:51:29" (1/1) ... [2022-07-20 23:51:29,097 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:51:29" (1/1) ... [2022-07-20 23:51:29,641 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2022-07-20 23:51:29,642 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 23:51:29,644 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 23:51:29,644 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 23:51:29,644 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 23:51:29,651 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:51:29" (1/1) ... [2022-07-20 23:51:29,652 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:51:29" (1/1) ... [2022-07-20 23:51:29,842 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:51:29" (1/1) ... [2022-07-20 23:51:29,845 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:51:29" (1/1) ... [2022-07-20 23:51:30,113 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:51:29" (1/1) ... [2022-07-20 23:51:30,181 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:51:29" (1/1) ... [2022-07-20 23:51:30,299 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:51:29" (1/1) ... [2022-07-20 23:51:30,406 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 23:51:30,407 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 23:51:30,407 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 23:51:30,407 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 23:51:30,408 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:51:29" (1/1) ... [2022-07-20 23:51:30,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 23:51:30,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 23:51:30,441 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-20 23:51:30,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-20 23:51:30,479 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 23:51:30,480 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-20 23:51:30,480 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 23:51:30,480 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 23:51:30,537 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 23:51:30,539 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 23:51:35,329 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 23:51:35,353 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 23:51:35,353 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-20 23:51:35,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:51:35 BoogieIcfgContainer [2022-07-20 23:51:35,357 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 23:51:35,359 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 23:51:35,359 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 23:51:35,362 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 23:51:35,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:51:27" (1/3) ... [2022-07-20 23:51:35,363 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d249dd0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:51:35, skipping insertion in model container [2022-07-20 23:51:35,364 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:51:29" (2/3) ... [2022-07-20 23:51:35,364 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d249dd0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:51:35, skipping insertion in model container [2022-07-20 23:51:35,364 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:51:35" (3/3) ... [2022-07-20 23:51:35,366 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label07.c [2022-07-20 23:51:35,380 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 23:51:35,380 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-20 23:51:35,461 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 23:51:35,467 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1aec9de2, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@44a9ea19 [2022-07-20 23:51:35,468 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-20 23:51:35,477 INFO L276 IsEmpty]: Start isEmpty. Operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:51:35,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-20 23:51:35,484 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:51:35,485 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:51:35,486 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:51:35,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:51:35,491 INFO L85 PathProgramCache]: Analyzing trace with hash -85512855, now seen corresponding path program 1 times [2022-07-20 23:51:35,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:51:35,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910498381] [2022-07-20 23:51:35,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:51:35,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:51:35,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:51:35,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 23:51:35,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:51:35,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910498381] [2022-07-20 23:51:35,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910498381] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:51:35,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:51:35,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 23:51:35,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609996957] [2022-07-20 23:51:35,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:51:35,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:51:35,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:51:35,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:51:35,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:51:35,713 INFO L87 Difference]: Start difference. First operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:51:40,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:51:40,139 INFO L93 Difference]: Finished difference Result 3082 states and 5689 transitions. [2022-07-20 23:51:40,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:51:40,141 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-20 23:51:40,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:51:40,164 INFO L225 Difference]: With dead ends: 3082 [2022-07-20 23:51:40,165 INFO L226 Difference]: Without dead ends: 1899 [2022-07-20 23:51:40,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:51:40,175 INFO L413 NwaCegarLoop]: 470 mSDtfsCounter, 1018 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 2955 mSolverCounterSat, 599 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1018 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 3554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 599 IncrementalHoareTripleChecker+Valid, 2955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-07-20 23:51:40,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1018 Valid, 641 Invalid, 3554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [599 Valid, 2955 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-07-20 23:51:40,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1899 states. [2022-07-20 23:51:40,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1899 to 1894. [2022-07-20 23:51:40,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1894 states, 1893 states have (on average 1.7374537770734284) internal successors, (3289), 1893 states have internal predecessors, (3289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:51:40,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1894 states to 1894 states and 3289 transitions. [2022-07-20 23:51:40,287 INFO L78 Accepts]: Start accepts. Automaton has 1894 states and 3289 transitions. Word has length 21 [2022-07-20 23:51:40,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:51:40,288 INFO L495 AbstractCegarLoop]: Abstraction has 1894 states and 3289 transitions. [2022-07-20 23:51:40,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:51:40,288 INFO L276 IsEmpty]: Start isEmpty. Operand 1894 states and 3289 transitions. [2022-07-20 23:51:40,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-07-20 23:51:40,290 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:51:40,291 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:51:40,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-20 23:51:40,292 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:51:40,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:51:40,292 INFO L85 PathProgramCache]: Analyzing trace with hash -774471582, now seen corresponding path program 1 times [2022-07-20 23:51:40,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:51:40,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124040021] [2022-07-20 23:51:40,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:51:40,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:51:40,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:51:40,432 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 23:51:40,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:51:40,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124040021] [2022-07-20 23:51:40,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124040021] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:51:40,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:51:40,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 23:51:40,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026461515] [2022-07-20 23:51:40,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:51:40,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:51:40,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:51:40,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:51:40,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:51:40,438 INFO L87 Difference]: Start difference. First operand 1894 states and 3289 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:51:43,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:51:43,953 INFO L93 Difference]: Finished difference Result 5384 states and 9441 transitions. [2022-07-20 23:51:43,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:51:43,954 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2022-07-20 23:51:43,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:51:43,970 INFO L225 Difference]: With dead ends: 5384 [2022-07-20 23:51:43,970 INFO L226 Difference]: Without dead ends: 3492 [2022-07-20 23:51:43,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:51:43,980 INFO L413 NwaCegarLoop]: 860 mSDtfsCounter, 922 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 2310 mSolverCounterSat, 879 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 922 SdHoareTripleChecker+Valid, 1013 SdHoareTripleChecker+Invalid, 3189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 879 IncrementalHoareTripleChecker+Valid, 2310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-07-20 23:51:43,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [922 Valid, 1013 Invalid, 3189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [879 Valid, 2310 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-07-20 23:51:43,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3492 states. [2022-07-20 23:51:44,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3492 to 3491. [2022-07-20 23:51:44,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3491 states, 3490 states have (on average 1.5383954154727795) internal successors, (5369), 3490 states have internal predecessors, (5369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:51:44,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3491 states to 3491 states and 5369 transitions. [2022-07-20 23:51:44,063 INFO L78 Accepts]: Start accepts. Automaton has 3491 states and 5369 transitions. Word has length 86 [2022-07-20 23:51:44,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:51:44,064 INFO L495 AbstractCegarLoop]: Abstraction has 3491 states and 5369 transitions. [2022-07-20 23:51:44,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:51:44,065 INFO L276 IsEmpty]: Start isEmpty. Operand 3491 states and 5369 transitions. [2022-07-20 23:51:44,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-07-20 23:51:44,073 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:51:44,074 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:51:44,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-20 23:51:44,077 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:51:44,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:51:44,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1608126599, now seen corresponding path program 1 times [2022-07-20 23:51:44,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:51:44,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981031722] [2022-07-20 23:51:44,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:51:44,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:51:44,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:51:44,199 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 23:51:44,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:51:44,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981031722] [2022-07-20 23:51:44,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981031722] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:51:44,200 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:51:44,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 23:51:44,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114131766] [2022-07-20 23:51:44,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:51:44,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:51:44,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:51:44,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:51:44,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:51:44,203 INFO L87 Difference]: Start difference. First operand 3491 states and 5369 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:51:47,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:51:47,396 INFO L93 Difference]: Finished difference Result 10169 states and 15700 transitions. [2022-07-20 23:51:47,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:51:47,397 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2022-07-20 23:51:47,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:51:47,429 INFO L225 Difference]: With dead ends: 10169 [2022-07-20 23:51:47,429 INFO L226 Difference]: Without dead ends: 6680 [2022-07-20 23:51:47,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:51:47,442 INFO L413 NwaCegarLoop]: 714 mSDtfsCounter, 977 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 2533 mSolverCounterSat, 775 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 977 SdHoareTripleChecker+Valid, 847 SdHoareTripleChecker+Invalid, 3308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 775 IncrementalHoareTripleChecker+Valid, 2533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-07-20 23:51:47,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [977 Valid, 847 Invalid, 3308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [775 Valid, 2533 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-07-20 23:51:47,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6680 states. [2022-07-20 23:51:47,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6680 to 6669. [2022-07-20 23:51:47,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6669 states, 6668 states have (on average 1.375224955008998) internal successors, (9170), 6668 states have internal predecessors, (9170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:51:47,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6669 states to 6669 states and 9170 transitions. [2022-07-20 23:51:47,578 INFO L78 Accepts]: Start accepts. Automaton has 6669 states and 9170 transitions. Word has length 88 [2022-07-20 23:51:47,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:51:47,579 INFO L495 AbstractCegarLoop]: Abstraction has 6669 states and 9170 transitions. [2022-07-20 23:51:47,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:51:47,579 INFO L276 IsEmpty]: Start isEmpty. Operand 6669 states and 9170 transitions. [2022-07-20 23:51:47,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-07-20 23:51:47,583 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:51:47,583 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:51:47,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-20 23:51:47,584 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:51:47,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:51:47,586 INFO L85 PathProgramCache]: Analyzing trace with hash -881651307, now seen corresponding path program 1 times [2022-07-20 23:51:47,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:51:47,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811741411] [2022-07-20 23:51:47,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:51:47,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:51:47,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:51:47,789 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 23:51:47,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:51:47,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811741411] [2022-07-20 23:51:47,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811741411] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:51:47,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:51:47,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 23:51:47,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564053571] [2022-07-20 23:51:47,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:51:47,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:51:47,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:51:47,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:51:47,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:51:47,793 INFO L87 Difference]: Start difference. First operand 6669 states and 9170 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 2 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:51:50,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:51:50,515 INFO L93 Difference]: Finished difference Result 14123 states and 19185 transitions. [2022-07-20 23:51:50,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:51:50,516 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 2 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2022-07-20 23:51:50,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:51:50,546 INFO L225 Difference]: With dead ends: 14123 [2022-07-20 23:51:50,547 INFO L226 Difference]: Without dead ends: 7456 [2022-07-20 23:51:50,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:51:50,557 INFO L413 NwaCegarLoop]: 1086 mSDtfsCounter, 678 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 2523 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 678 SdHoareTripleChecker+Valid, 1215 SdHoareTripleChecker+Invalid, 2577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 2523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-20 23:51:50,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [678 Valid, 1215 Invalid, 2577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 2523 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-07-20 23:51:50,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7456 states. [2022-07-20 23:51:50,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7456 to 7456. [2022-07-20 23:51:50,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7456 states, 7455 states have (on average 1.3362843729040912) internal successors, (9962), 7455 states have internal predecessors, (9962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:51:50,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7456 states to 7456 states and 9962 transitions. [2022-07-20 23:51:50,700 INFO L78 Accepts]: Start accepts. Automaton has 7456 states and 9962 transitions. Word has length 132 [2022-07-20 23:51:50,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:51:50,702 INFO L495 AbstractCegarLoop]: Abstraction has 7456 states and 9962 transitions. [2022-07-20 23:51:50,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 2 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:51:50,702 INFO L276 IsEmpty]: Start isEmpty. Operand 7456 states and 9962 transitions. [2022-07-20 23:51:50,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-07-20 23:51:50,704 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:51:50,704 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:51:50,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-20 23:51:50,705 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:51:50,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:51:50,705 INFO L85 PathProgramCache]: Analyzing trace with hash 2047768511, now seen corresponding path program 1 times [2022-07-20 23:51:50,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:51:50,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092680675] [2022-07-20 23:51:50,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:51:50,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:51:50,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:51:50,953 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 23:51:50,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:51:50,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092680675] [2022-07-20 23:51:50,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092680675] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 23:51:50,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478324246] [2022-07-20 23:51:50,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:51:50,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 23:51:50,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 23:51:50,957 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 23:51:50,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-20 23:51:51,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:51:51,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-20 23:51:51,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 23:51:51,244 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-20 23:51:51,244 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 23:51:51,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478324246] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:51:51,245 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 23:51:51,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-07-20 23:51:51,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544784077] [2022-07-20 23:51:51,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:51:51,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:51:51,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:51:51,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:51:51,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-20 23:51:51,247 INFO L87 Difference]: Start difference. First operand 7456 states and 9962 transitions. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:51:54,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:51:54,521 INFO L93 Difference]: Finished difference Result 19656 states and 26991 transitions. [2022-07-20 23:51:54,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:51:54,523 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 146 [2022-07-20 23:51:54,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:51:54,556 INFO L225 Difference]: With dead ends: 19656 [2022-07-20 23:51:54,556 INFO L226 Difference]: Without dead ends: 12989 [2022-07-20 23:51:54,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-20 23:51:54,566 INFO L413 NwaCegarLoop]: 1071 mSDtfsCounter, 737 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 2526 mSolverCounterSat, 779 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 737 SdHoareTripleChecker+Valid, 1222 SdHoareTripleChecker+Invalid, 3305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 779 IncrementalHoareTripleChecker+Valid, 2526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-07-20 23:51:54,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [737 Valid, 1222 Invalid, 3305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [779 Valid, 2526 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-07-20 23:51:54,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12989 states. [2022-07-20 23:51:54,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12989 to 12972. [2022-07-20 23:51:54,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12972 states, 12971 states have (on average 1.235910878112713) internal successors, (16031), 12971 states have internal predecessors, (16031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:51:54,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12972 states to 12972 states and 16031 transitions. [2022-07-20 23:51:54,831 INFO L78 Accepts]: Start accepts. Automaton has 12972 states and 16031 transitions. Word has length 146 [2022-07-20 23:51:54,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:51:54,836 INFO L495 AbstractCegarLoop]: Abstraction has 12972 states and 16031 transitions. [2022-07-20 23:51:54,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:51:54,837 INFO L276 IsEmpty]: Start isEmpty. Operand 12972 states and 16031 transitions. [2022-07-20 23:51:54,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2022-07-20 23:51:54,840 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:51:54,840 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:51:54,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-20 23:51:55,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 23:51:55,052 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:51:55,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:51:55,053 INFO L85 PathProgramCache]: Analyzing trace with hash 482289442, now seen corresponding path program 1 times [2022-07-20 23:51:55,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:51:55,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664288784] [2022-07-20 23:51:55,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:51:55,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:51:55,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:51:55,231 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-07-20 23:51:55,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:51:55,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664288784] [2022-07-20 23:51:55,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664288784] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:51:55,232 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:51:55,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 23:51:55,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652053304] [2022-07-20 23:51:55,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:51:55,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:51:55,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:51:55,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:51:55,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:51:55,234 INFO L87 Difference]: Start difference. First operand 12972 states and 16031 transitions. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 2 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:51:58,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:51:58,273 INFO L93 Difference]: Finished difference Result 22792 states and 28651 transitions. [2022-07-20 23:51:58,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:51:58,274 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 2 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 233 [2022-07-20 23:51:58,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:51:58,301 INFO L225 Difference]: With dead ends: 22792 [2022-07-20 23:51:58,302 INFO L226 Difference]: Without dead ends: 12980 [2022-07-20 23:51:58,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:51:58,316 INFO L413 NwaCegarLoop]: 1027 mSDtfsCounter, 728 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 2714 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 728 SdHoareTripleChecker+Valid, 1211 SdHoareTripleChecker+Invalid, 2718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 2714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-07-20 23:51:58,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [728 Valid, 1211 Invalid, 2718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 2714 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-07-20 23:51:58,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12980 states. [2022-07-20 23:51:58,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12980 to 12972. [2022-07-20 23:51:58,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12972 states, 12971 states have (on average 1.2347544522396114) internal successors, (16016), 12971 states have internal predecessors, (16016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:51:58,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12972 states to 12972 states and 16016 transitions. [2022-07-20 23:51:58,539 INFO L78 Accepts]: Start accepts. Automaton has 12972 states and 16016 transitions. Word has length 233 [2022-07-20 23:51:58,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:51:58,539 INFO L495 AbstractCegarLoop]: Abstraction has 12972 states and 16016 transitions. [2022-07-20 23:51:58,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 2 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:51:58,540 INFO L276 IsEmpty]: Start isEmpty. Operand 12972 states and 16016 transitions. [2022-07-20 23:51:58,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-07-20 23:51:58,544 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:51:58,544 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:51:58,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-20 23:51:58,545 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:51:58,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:51:58,546 INFO L85 PathProgramCache]: Analyzing trace with hash 447702536, now seen corresponding path program 1 times [2022-07-20 23:51:58,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:51:58,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965221246] [2022-07-20 23:51:58,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:51:58,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:51:58,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:51:58,690 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 23:51:58,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:51:58,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965221246] [2022-07-20 23:51:58,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965221246] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:51:58,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:51:58,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:51:58,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078694580] [2022-07-20 23:51:58,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:51:58,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:51:58,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:51:58,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:51:58,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:51:58,694 INFO L87 Difference]: Start difference. First operand 12972 states and 16016 transitions. Second operand has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:52:02,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:52:02,016 INFO L93 Difference]: Finished difference Result 36166 states and 45134 transitions. [2022-07-20 23:52:02,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:52:02,020 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 235 [2022-07-20 23:52:02,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:52:02,058 INFO L225 Difference]: With dead ends: 36166 [2022-07-20 23:52:02,059 INFO L226 Difference]: Without dead ends: 23196 [2022-07-20 23:52:02,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:52:02,082 INFO L413 NwaCegarLoop]: 1851 mSDtfsCounter, 842 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 2479 mSolverCounterSat, 807 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 842 SdHoareTripleChecker+Valid, 1988 SdHoareTripleChecker+Invalid, 3286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 807 IncrementalHoareTripleChecker+Valid, 2479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-07-20 23:52:02,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [842 Valid, 1988 Invalid, 3286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [807 Valid, 2479 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-07-20 23:52:02,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23196 states. [2022-07-20 23:52:02,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23196 to 23191. [2022-07-20 23:52:02,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23191 states, 23190 states have (on average 1.1870202673566193) internal successors, (27527), 23190 states have internal predecessors, (27527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:52:02,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23191 states to 23191 states and 27527 transitions. [2022-07-20 23:52:02,412 INFO L78 Accepts]: Start accepts. Automaton has 23191 states and 27527 transitions. Word has length 235 [2022-07-20 23:52:02,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:52:02,412 INFO L495 AbstractCegarLoop]: Abstraction has 23191 states and 27527 transitions. [2022-07-20 23:52:02,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:52:02,413 INFO L276 IsEmpty]: Start isEmpty. Operand 23191 states and 27527 transitions. [2022-07-20 23:52:02,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2022-07-20 23:52:02,417 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:52:02,417 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:52:02,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-20 23:52:02,417 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:52:02,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:52:02,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1872557880, now seen corresponding path program 1 times [2022-07-20 23:52:02,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:52:02,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663325540] [2022-07-20 23:52:02,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:52:02,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:52:02,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:52:02,579 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 242 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-20 23:52:02,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:52:02,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663325540] [2022-07-20 23:52:02,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663325540] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:52:02,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:52:02,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:52:02,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401557307] [2022-07-20 23:52:02,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:52:02,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:52:02,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:52:02,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:52:02,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:52:02,582 INFO L87 Difference]: Start difference. First operand 23191 states and 27527 transitions. Second operand has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:52:06,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:52:06,261 INFO L93 Difference]: Finished difference Result 56620 states and 68544 transitions. [2022-07-20 23:52:06,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:52:06,261 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 257 [2022-07-20 23:52:06,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:52:06,317 INFO L225 Difference]: With dead ends: 56620 [2022-07-20 23:52:06,318 INFO L226 Difference]: Without dead ends: 34218 [2022-07-20 23:52:06,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:52:06,347 INFO L413 NwaCegarLoop]: 810 mSDtfsCounter, 882 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 2384 mSolverCounterSat, 903 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 882 SdHoareTripleChecker+Valid, 928 SdHoareTripleChecker+Invalid, 3287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 903 IncrementalHoareTripleChecker+Valid, 2384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-07-20 23:52:06,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [882 Valid, 928 Invalid, 3287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [903 Valid, 2384 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-07-20 23:52:06,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34218 states. [2022-07-20 23:52:06,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34218 to 33423. [2022-07-20 23:52:06,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33423 states, 33422 states have (on average 1.1722518101849082) internal successors, (39179), 33422 states have internal predecessors, (39179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:52:06,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33423 states to 33423 states and 39179 transitions. [2022-07-20 23:52:06,758 INFO L78 Accepts]: Start accepts. Automaton has 33423 states and 39179 transitions. Word has length 257 [2022-07-20 23:52:06,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:52:06,759 INFO L495 AbstractCegarLoop]: Abstraction has 33423 states and 39179 transitions. [2022-07-20 23:52:06,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:52:06,759 INFO L276 IsEmpty]: Start isEmpty. Operand 33423 states and 39179 transitions. [2022-07-20 23:52:06,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2022-07-20 23:52:06,764 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:52:06,764 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:52:06,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-20 23:52:06,765 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:52:06,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:52:06,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1002442702, now seen corresponding path program 1 times [2022-07-20 23:52:06,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:52:06,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575128060] [2022-07-20 23:52:06,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:52:06,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:52:06,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:52:06,878 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 313 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-20 23:52:06,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:52:06,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575128060] [2022-07-20 23:52:06,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575128060] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:52:06,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:52:06,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:52:06,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771426827] [2022-07-20 23:52:06,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:52:06,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 23:52:06,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:52:06,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 23:52:06,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 23:52:06,882 INFO L87 Difference]: Start difference. First operand 33423 states and 39179 transitions. Second operand has 4 states, 4 states have (on average 72.75) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:52:13,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:52:13,476 INFO L93 Difference]: Finished difference Result 118210 states and 138562 transitions. [2022-07-20 23:52:13,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 23:52:13,480 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 72.75) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 309 [2022-07-20 23:52:13,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:52:13,613 INFO L225 Difference]: With dead ends: 118210 [2022-07-20 23:52:13,614 INFO L226 Difference]: Without dead ends: 85576 [2022-07-20 23:52:13,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 23:52:13,649 INFO L413 NwaCegarLoop]: 867 mSDtfsCounter, 1700 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 6259 mSolverCounterSat, 995 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1700 SdHoareTripleChecker+Valid, 1065 SdHoareTripleChecker+Invalid, 7254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 995 IncrementalHoareTripleChecker+Valid, 6259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-07-20 23:52:13,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1700 Valid, 1065 Invalid, 7254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [995 Valid, 6259 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2022-07-20 23:52:13,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85576 states. [2022-07-20 23:52:14,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85576 to 82306. [2022-07-20 23:52:14,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82306 states, 82305 states have (on average 1.1536723163841809) internal successors, (94953), 82305 states have internal predecessors, (94953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:52:14,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82306 states to 82306 states and 94953 transitions. [2022-07-20 23:52:14,559 INFO L78 Accepts]: Start accepts. Automaton has 82306 states and 94953 transitions. Word has length 309 [2022-07-20 23:52:14,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:52:14,560 INFO L495 AbstractCegarLoop]: Abstraction has 82306 states and 94953 transitions. [2022-07-20 23:52:14,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.75) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:52:14,560 INFO L276 IsEmpty]: Start isEmpty. Operand 82306 states and 94953 transitions. [2022-07-20 23:52:14,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2022-07-20 23:52:14,566 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:52:14,566 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:52:14,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-20 23:52:14,567 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:52:14,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:52:14,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1986433391, now seen corresponding path program 1 times [2022-07-20 23:52:14,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:52:14,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485163676] [2022-07-20 23:52:14,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:52:14,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:52:14,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:52:14,877 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 166 proven. 113 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-20 23:52:14,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:52:14,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485163676] [2022-07-20 23:52:14,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485163676] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 23:52:14,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449545095] [2022-07-20 23:52:14,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:52:14,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 23:52:14,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 23:52:14,884 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 23:52:14,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-20 23:52:15,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:52:15,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-20 23:52:15,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 23:52:15,132 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 185 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-07-20 23:52:15,132 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 23:52:15,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449545095] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:52:15,133 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 23:52:15,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2022-07-20 23:52:15,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460379462] [2022-07-20 23:52:15,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:52:15,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:52:15,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:52:15,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:52:15,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-20 23:52:15,135 INFO L87 Difference]: Start difference. First operand 82306 states and 94953 transitions. Second operand has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:52:18,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:52:18,894 INFO L93 Difference]: Finished difference Result 163812 states and 189102 transitions. [2022-07-20 23:52:18,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:52:18,895 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 327 [2022-07-20 23:52:18,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:52:19,006 INFO L225 Difference]: With dead ends: 163812 [2022-07-20 23:52:19,006 INFO L226 Difference]: Without dead ends: 82295 [2022-07-20 23:52:19,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-20 23:52:19,040 INFO L413 NwaCegarLoop]: 682 mSDtfsCounter, 1073 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 2388 mSolverCounterSat, 532 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1073 SdHoareTripleChecker+Valid, 816 SdHoareTripleChecker+Invalid, 2920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 532 IncrementalHoareTripleChecker+Valid, 2388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-07-20 23:52:19,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1073 Valid, 816 Invalid, 2920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [532 Valid, 2388 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-07-20 23:52:19,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82295 states. [2022-07-20 23:52:19,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82295 to 82292. [2022-07-20 23:52:19,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82292 states, 82291 states have (on average 1.1159057491098663) internal successors, (91829), 82291 states have internal predecessors, (91829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:52:20,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82292 states to 82292 states and 91829 transitions. [2022-07-20 23:52:20,074 INFO L78 Accepts]: Start accepts. Automaton has 82292 states and 91829 transitions. Word has length 327 [2022-07-20 23:52:20,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:52:20,075 INFO L495 AbstractCegarLoop]: Abstraction has 82292 states and 91829 transitions. [2022-07-20 23:52:20,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:52:20,075 INFO L276 IsEmpty]: Start isEmpty. Operand 82292 states and 91829 transitions. [2022-07-20 23:52:20,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2022-07-20 23:52:20,083 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:52:20,083 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:52:20,113 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-20 23:52:20,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-20 23:52:20,311 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:52:20,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:52:20,312 INFO L85 PathProgramCache]: Analyzing trace with hash -832537303, now seen corresponding path program 1 times [2022-07-20 23:52:20,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:52:20,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399613752] [2022-07-20 23:52:20,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:52:20,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:52:20,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:52:20,792 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 260 proven. 113 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-20 23:52:20,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:52:20,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399613752] [2022-07-20 23:52:20,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399613752] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 23:52:20,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139982860] [2022-07-20 23:52:20,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:52:20,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 23:52:20,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 23:52:20,866 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 23:52:20,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-20 23:52:21,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:52:21,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-20 23:52:21,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 23:52:21,189 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 260 proven. 0 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-07-20 23:52:21,190 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 23:52:21,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139982860] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:52:21,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 23:52:21,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2022-07-20 23:52:21,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171664132] [2022-07-20 23:52:21,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:52:21,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:52:21,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:52:21,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:52:21,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-20 23:52:21,192 INFO L87 Difference]: Start difference. First operand 82292 states and 91829 transitions. Second operand has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:52:24,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:52:24,255 INFO L93 Difference]: Finished difference Result 163793 states and 182863 transitions. [2022-07-20 23:52:24,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:52:24,255 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 376 [2022-07-20 23:52:24,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:52:24,362 INFO L225 Difference]: With dead ends: 163793 [2022-07-20 23:52:24,363 INFO L226 Difference]: Without dead ends: 82290 [2022-07-20 23:52:24,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 375 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-20 23:52:24,503 INFO L413 NwaCegarLoop]: 1344 mSDtfsCounter, 1084 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 2463 mSolverCounterSat, 444 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1084 SdHoareTripleChecker+Valid, 1424 SdHoareTripleChecker+Invalid, 2907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 444 IncrementalHoareTripleChecker+Valid, 2463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-20 23:52:24,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1084 Valid, 1424 Invalid, 2907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [444 Valid, 2463 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-07-20 23:52:24,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82290 states. [2022-07-20 23:52:25,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82290 to 82289. [2022-07-20 23:52:25,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82289 states, 82288 states have (on average 1.0886277464514875) internal successors, (89581), 82288 states have internal predecessors, (89581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:52:25,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82289 states to 82289 states and 89581 transitions. [2022-07-20 23:52:25,616 INFO L78 Accepts]: Start accepts. Automaton has 82289 states and 89581 transitions. Word has length 376 [2022-07-20 23:52:25,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:52:25,616 INFO L495 AbstractCegarLoop]: Abstraction has 82289 states and 89581 transitions. [2022-07-20 23:52:25,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:52:25,617 INFO L276 IsEmpty]: Start isEmpty. Operand 82289 states and 89581 transitions. [2022-07-20 23:52:25,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2022-07-20 23:52:25,636 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:52:25,636 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:52:25,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-20 23:52:25,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 23:52:25,837 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:52:25,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:52:25,838 INFO L85 PathProgramCache]: Analyzing trace with hash -645209022, now seen corresponding path program 1 times [2022-07-20 23:52:25,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:52:25,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981212528] [2022-07-20 23:52:25,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:52:25,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:52:25,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:52:25,975 INFO L134 CoverageAnalysis]: Checked inductivity of 565 backedges. 404 proven. 0 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2022-07-20 23:52:25,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:52:25,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981212528] [2022-07-20 23:52:25,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981212528] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:52:25,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:52:25,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:52:25,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50619880] [2022-07-20 23:52:25,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:52:25,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:52:25,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:52:25,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:52:25,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:52:25,978 INFO L87 Difference]: Start difference. First operand 82289 states and 89581 transitions. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:52:29,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:52:29,746 INFO L93 Difference]: Finished difference Result 189767 states and 208222 transitions. [2022-07-20 23:52:29,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:52:29,747 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 377 [2022-07-20 23:52:29,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:52:29,899 INFO L225 Difference]: With dead ends: 189767 [2022-07-20 23:52:29,899 INFO L226 Difference]: Without dead ends: 108267 [2022-07-20 23:52:29,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:52:29,941 INFO L413 NwaCegarLoop]: 822 mSDtfsCounter, 884 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 2419 mSolverCounterSat, 930 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 884 SdHoareTripleChecker+Valid, 904 SdHoareTripleChecker+Invalid, 3349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 930 IncrementalHoareTripleChecker+Valid, 2419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-07-20 23:52:29,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [884 Valid, 904 Invalid, 3349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [930 Valid, 2419 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-07-20 23:52:30,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108267 states. [2022-07-20 23:52:31,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108267 to 106674. [2022-07-20 23:52:31,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106674 states, 106673 states have (on average 1.092113280773954) internal successors, (116499), 106673 states have internal predecessors, (116499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:52:31,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106674 states to 106674 states and 116499 transitions. [2022-07-20 23:52:31,387 INFO L78 Accepts]: Start accepts. Automaton has 106674 states and 116499 transitions. Word has length 377 [2022-07-20 23:52:31,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:52:31,387 INFO L495 AbstractCegarLoop]: Abstraction has 106674 states and 116499 transitions. [2022-07-20 23:52:31,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:52:31,388 INFO L276 IsEmpty]: Start isEmpty. Operand 106674 states and 116499 transitions. [2022-07-20 23:52:31,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2022-07-20 23:52:31,396 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:52:31,396 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:52:31,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-20 23:52:31,397 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:52:31,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:52:31,398 INFO L85 PathProgramCache]: Analyzing trace with hash 307251648, now seen corresponding path program 1 times [2022-07-20 23:52:31,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:52:31,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420815875] [2022-07-20 23:52:31,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:52:31,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:52:31,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:52:31,728 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 246 proven. 110 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-20 23:52:31,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:52:31,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420815875] [2022-07-20 23:52:31,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420815875] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 23:52:31,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827623948] [2022-07-20 23:52:31,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:52:31,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 23:52:31,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 23:52:31,731 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 23:52:31,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-20 23:52:32,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:52:32,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 23:52:32,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 23:52:32,892 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 232 proven. 0 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2022-07-20 23:52:32,892 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 23:52:32,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827623948] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:52:32,893 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 23:52:32,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-07-20 23:52:32,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562605435] [2022-07-20 23:52:32,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:52:32,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:52:32,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:52:32,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:52:32,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-20 23:52:32,895 INFO L87 Difference]: Start difference. First operand 106674 states and 116499 transitions. Second operand has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 2 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:52:35,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:52:35,925 INFO L93 Difference]: Finished difference Result 206271 states and 225611 transitions. [2022-07-20 23:52:35,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:52:35,925 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 2 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 410 [2022-07-20 23:52:35,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:52:36,059 INFO L225 Difference]: With dead ends: 206271 [2022-07-20 23:52:36,060 INFO L226 Difference]: Without dead ends: 110619 [2022-07-20 23:52:36,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 409 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-20 23:52:36,115 INFO L413 NwaCegarLoop]: 1033 mSDtfsCounter, 643 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 2462 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 643 SdHoareTripleChecker+Valid, 1167 SdHoareTripleChecker+Invalid, 2575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 2462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-20 23:52:36,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [643 Valid, 1167 Invalid, 2575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 2462 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-20 23:52:36,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110619 states. [2022-07-20 23:52:37,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110619 to 109035. [2022-07-20 23:52:37,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109035 states, 109034 states have (on average 1.0828365463983711) internal successors, (118066), 109034 states have internal predecessors, (118066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:52:37,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109035 states to 109035 states and 118066 transitions. [2022-07-20 23:52:37,602 INFO L78 Accepts]: Start accepts. Automaton has 109035 states and 118066 transitions. Word has length 410 [2022-07-20 23:52:37,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:52:37,602 INFO L495 AbstractCegarLoop]: Abstraction has 109035 states and 118066 transitions. [2022-07-20 23:52:37,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 2 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:52:37,603 INFO L276 IsEmpty]: Start isEmpty. Operand 109035 states and 118066 transitions. [2022-07-20 23:52:37,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 470 [2022-07-20 23:52:37,613 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:52:37,613 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:52:37,638 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-20 23:52:37,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 23:52:37,828 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:52:37,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:52:37,828 INFO L85 PathProgramCache]: Analyzing trace with hash -482627801, now seen corresponding path program 1 times [2022-07-20 23:52:37,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:52:37,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411142288] [2022-07-20 23:52:37,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:52:37,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:52:37,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:52:38,447 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 388 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2022-07-20 23:52:38,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:52:38,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411142288] [2022-07-20 23:52:38,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411142288] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:52:38,447 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:52:38,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:52:38,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307825788] [2022-07-20 23:52:38,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:52:38,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:52:38,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:52:38,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:52:38,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:52:38,449 INFO L87 Difference]: Start difference. First operand 109035 states and 118066 transitions. Second operand has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:52:42,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:52:42,218 INFO L93 Difference]: Finished difference Result 242480 states and 264083 transitions. [2022-07-20 23:52:42,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:52:42,218 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 469 [2022-07-20 23:52:42,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:52:42,393 INFO L225 Difference]: With dead ends: 242480 [2022-07-20 23:52:42,393 INFO L226 Difference]: Without dead ends: 132660 [2022-07-20 23:52:42,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:52:42,439 INFO L413 NwaCegarLoop]: 1753 mSDtfsCounter, 721 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 2500 mSolverCounterSat, 662 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 721 SdHoareTripleChecker+Valid, 1897 SdHoareTripleChecker+Invalid, 3162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 662 IncrementalHoareTripleChecker+Valid, 2500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-07-20 23:52:42,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [721 Valid, 1897 Invalid, 3162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [662 Valid, 2500 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-07-20 23:52:42,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132660 states. [2022-07-20 23:52:43,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132660 to 131070. [2022-07-20 23:52:43,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131070 states, 131069 states have (on average 1.0732057160732134) internal successors, (140664), 131069 states have internal predecessors, (140664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:52:44,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131070 states to 131070 states and 140664 transitions. [2022-07-20 23:52:44,094 INFO L78 Accepts]: Start accepts. Automaton has 131070 states and 140664 transitions. Word has length 469 [2022-07-20 23:52:44,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:52:44,094 INFO L495 AbstractCegarLoop]: Abstraction has 131070 states and 140664 transitions. [2022-07-20 23:52:44,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:52:44,095 INFO L276 IsEmpty]: Start isEmpty. Operand 131070 states and 140664 transitions. [2022-07-20 23:52:44,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 544 [2022-07-20 23:52:44,107 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:52:44,108 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-20 23:52:44,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-20 23:52:44,108 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:52:44,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:52:44,109 INFO L85 PathProgramCache]: Analyzing trace with hash -493778240, now seen corresponding path program 1 times [2022-07-20 23:52:44,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:52:44,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444539401] [2022-07-20 23:52:44,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:52:44,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:52:44,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:52:44,390 INFO L134 CoverageAnalysis]: Checked inductivity of 939 backedges. 709 proven. 75 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-07-20 23:52:44,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:52:44,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444539401] [2022-07-20 23:52:44,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444539401] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 23:52:44,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324066949] [2022-07-20 23:52:44,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:52:44,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 23:52:44,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 23:52:44,393 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 23:52:44,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-20 23:52:44,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:52:44,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 744 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 23:52:44,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 23:52:45,690 INFO L134 CoverageAnalysis]: Checked inductivity of 939 backedges. 847 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-07-20 23:52:45,690 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 23:52:45,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324066949] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:52:45,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 23:52:45,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2022-07-20 23:52:45,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414597712] [2022-07-20 23:52:45,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:52:45,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 23:52:45,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:52:45,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 23:52:45,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-20 23:52:45,693 INFO L87 Difference]: Start difference. First operand 131070 states and 140664 transitions. Second operand has 4 states, 4 states have (on average 113.25) internal successors, (453), 4 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:52:50,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:52:50,091 INFO L93 Difference]: Finished difference Result 248759 states and 267808 transitions. [2022-07-20 23:52:50,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 23:52:50,092 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 113.25) internal successors, (453), 4 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 543 [2022-07-20 23:52:50,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:52:50,273 INFO L225 Difference]: With dead ends: 248759 [2022-07-20 23:52:50,273 INFO L226 Difference]: Without dead ends: 133437 [2022-07-20 23:52:50,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 546 GetRequests, 542 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-20 23:52:50,329 INFO L413 NwaCegarLoop]: 656 mSDtfsCounter, 1650 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 4444 mSolverCounterSat, 442 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1650 SdHoareTripleChecker+Valid, 905 SdHoareTripleChecker+Invalid, 4886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 442 IncrementalHoareTripleChecker+Valid, 4444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-07-20 23:52:50,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1650 Valid, 905 Invalid, 4886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [442 Valid, 4444 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-07-20 23:52:50,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133437 states. [2022-07-20 23:52:51,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133437 to 131853. [2022-07-20 23:52:51,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131853 states, 131852 states have (on average 1.072634468950035) internal successors, (141429), 131852 states have internal predecessors, (141429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:52:52,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131853 states to 131853 states and 141429 transitions. [2022-07-20 23:52:52,154 INFO L78 Accepts]: Start accepts. Automaton has 131853 states and 141429 transitions. Word has length 543 [2022-07-20 23:52:52,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:52:52,154 INFO L495 AbstractCegarLoop]: Abstraction has 131853 states and 141429 transitions. [2022-07-20 23:52:52,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 113.25) internal successors, (453), 4 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:52:52,155 INFO L276 IsEmpty]: Start isEmpty. Operand 131853 states and 141429 transitions. [2022-07-20 23:52:52,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 602 [2022-07-20 23:52:52,180 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:52:52,181 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:52:52,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-20 23:52:52,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-20 23:52:52,382 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:52:52,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:52:52,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1371945116, now seen corresponding path program 1 times [2022-07-20 23:52:52,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:52:52,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947424291] [2022-07-20 23:52:52,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:52:52,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:52:52,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:52:52,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1059 backedges. 474 proven. 0 refuted. 0 times theorem prover too weak. 585 trivial. 0 not checked. [2022-07-20 23:52:52,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:52:52,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947424291] [2022-07-20 23:52:52,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947424291] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:52:52,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:52:52,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:52:52,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231097146] [2022-07-20 23:52:52,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:52:52,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:52:52,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:52:52,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:52:52,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:52:52,644 INFO L87 Difference]: Start difference. First operand 131853 states and 141429 transitions. Second operand has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:52:56,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:52:56,837 INFO L93 Difference]: Finished difference Result 299143 states and 322738 transitions. [2022-07-20 23:52:56,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:52:56,837 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 601 [2022-07-20 23:52:56,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:52:57,077 INFO L225 Difference]: With dead ends: 299143 [2022-07-20 23:52:57,077 INFO L226 Difference]: Without dead ends: 179881 [2022-07-20 23:52:57,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:52:57,525 INFO L413 NwaCegarLoop]: 758 mSDtfsCounter, 917 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 2366 mSolverCounterSat, 816 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 917 SdHoareTripleChecker+Valid, 856 SdHoareTripleChecker+Invalid, 3182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 816 IncrementalHoareTripleChecker+Valid, 2366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-07-20 23:52:57,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [917 Valid, 856 Invalid, 3182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [816 Valid, 2366 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-07-20 23:52:57,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179881 states. [2022-07-20 23:52:59,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179881 to 148376. [2022-07-20 23:52:59,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148376 states, 148375 states have (on average 1.0655231676495367) internal successors, (158097), 148375 states have internal predecessors, (158097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:52:59,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148376 states to 148376 states and 158097 transitions. [2022-07-20 23:52:59,698 INFO L78 Accepts]: Start accepts. Automaton has 148376 states and 158097 transitions. Word has length 601 [2022-07-20 23:52:59,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:52:59,699 INFO L495 AbstractCegarLoop]: Abstraction has 148376 states and 158097 transitions. [2022-07-20 23:52:59,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:52:59,699 INFO L276 IsEmpty]: Start isEmpty. Operand 148376 states and 158097 transitions. [2022-07-20 23:52:59,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 608 [2022-07-20 23:52:59,744 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:52:59,744 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-20 23:52:59,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-20 23:52:59,745 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:52:59,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:52:59,746 INFO L85 PathProgramCache]: Analyzing trace with hash -318205576, now seen corresponding path program 1 times [2022-07-20 23:52:59,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:52:59,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286005411] [2022-07-20 23:52:59,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:52:59,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:52:59,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:53:00,041 INFO L134 CoverageAnalysis]: Checked inductivity of 851 backedges. 599 proven. 0 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2022-07-20 23:53:00,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:53:00,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286005411] [2022-07-20 23:53:00,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286005411] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:53:00,043 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:53:00,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:53:00,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845803158] [2022-07-20 23:53:00,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:53:00,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:53:00,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:53:00,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:53:00,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:53:00,045 INFO L87 Difference]: Start difference. First operand 148376 states and 158097 transitions. Second operand has 3 states, 3 states have (on average 143.33333333333334) internal successors, (430), 3 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:53:04,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:53:04,322 INFO L93 Difference]: Finished difference Result 327472 states and 351177 transitions. [2022-07-20 23:53:04,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:53:04,323 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 143.33333333333334) internal successors, (430), 3 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 607 [2022-07-20 23:53:04,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:53:04,572 INFO L225 Difference]: With dead ends: 327472 [2022-07-20 23:53:04,572 INFO L226 Difference]: Without dead ends: 194844 [2022-07-20 23:53:04,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:53:04,633 INFO L413 NwaCegarLoop]: 530 mSDtfsCounter, 1024 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 2403 mSolverCounterSat, 858 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1024 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 3261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 858 IncrementalHoareTripleChecker+Valid, 2403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-07-20 23:53:04,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1024 Valid, 611 Invalid, 3261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [858 Valid, 2403 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-07-20 23:53:04,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194844 states. [2022-07-20 23:53:06,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194844 to 194840. [2022-07-20 23:53:06,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194840 states, 194839 states have (on average 1.0665061922920975) internal successors, (207797), 194839 states have internal predecessors, (207797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:53:07,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194840 states to 194840 states and 207797 transitions. [2022-07-20 23:53:07,084 INFO L78 Accepts]: Start accepts. Automaton has 194840 states and 207797 transitions. Word has length 607 [2022-07-20 23:53:07,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:53:07,084 INFO L495 AbstractCegarLoop]: Abstraction has 194840 states and 207797 transitions. [2022-07-20 23:53:07,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.33333333333334) internal successors, (430), 3 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:53:07,085 INFO L276 IsEmpty]: Start isEmpty. Operand 194840 states and 207797 transitions. [2022-07-20 23:53:07,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 646 [2022-07-20 23:53:07,103 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:53:07,103 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 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] [2022-07-20 23:53:07,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-20 23:53:07,104 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:53:07,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:53:07,104 INFO L85 PathProgramCache]: Analyzing trace with hash -451977714, now seen corresponding path program 1 times [2022-07-20 23:53:07,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:53:07,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343003211] [2022-07-20 23:53:07,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:53:07,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:53:07,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:53:07,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 795 proven. 0 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2022-07-20 23:53:07,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:53:07,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343003211] [2022-07-20 23:53:07,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343003211] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:53:07,825 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:53:07,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:53:07,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841343874] [2022-07-20 23:53:07,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:53:07,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:53:07,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:53:07,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:53:07,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:53:07,844 INFO L87 Difference]: Start difference. First operand 194840 states and 207797 transitions. Second operand has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:53:12,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:53:12,046 INFO L93 Difference]: Finished difference Result 388898 states and 414786 transitions. [2022-07-20 23:53:12,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:53:12,047 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 645 [2022-07-20 23:53:12,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:53:12,330 INFO L225 Difference]: With dead ends: 388898 [2022-07-20 23:53:12,330 INFO L226 Difference]: Without dead ends: 194847 [2022-07-20 23:53:12,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:53:12,427 INFO L413 NwaCegarLoop]: 1335 mSDtfsCounter, 932 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 2382 mSolverCounterSat, 552 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 932 SdHoareTripleChecker+Valid, 1417 SdHoareTripleChecker+Invalid, 2934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 552 IncrementalHoareTripleChecker+Valid, 2382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-07-20 23:53:12,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [932 Valid, 1417 Invalid, 2934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [552 Valid, 2382 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-07-20 23:53:12,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194847 states. [2022-07-20 23:53:14,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194847 to 193259. [2022-07-20 23:53:14,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193259 states, 193258 states have (on average 1.051133717621004) internal successors, (203140), 193258 states have internal predecessors, (203140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:53:14,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193259 states to 193259 states and 203140 transitions. [2022-07-20 23:53:14,986 INFO L78 Accepts]: Start accepts. Automaton has 193259 states and 203140 transitions. Word has length 645 [2022-07-20 23:53:14,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:53:14,987 INFO L495 AbstractCegarLoop]: Abstraction has 193259 states and 203140 transitions. [2022-07-20 23:53:14,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:53:14,987 INFO L276 IsEmpty]: Start isEmpty. Operand 193259 states and 203140 transitions. [2022-07-20 23:53:15,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 657 [2022-07-20 23:53:15,001 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:53:15,001 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:53:15,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-20 23:53:15,001 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:53:15,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:53:15,002 INFO L85 PathProgramCache]: Analyzing trace with hash -582317402, now seen corresponding path program 1 times [2022-07-20 23:53:15,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:53:15,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103804773] [2022-07-20 23:53:15,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:53:15,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:53:15,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:53:15,181 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 675 proven. 0 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2022-07-20 23:53:15,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:53:15,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103804773] [2022-07-20 23:53:15,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103804773] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:53:15,183 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:53:15,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:53:15,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570419915] [2022-07-20 23:53:15,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:53:15,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:53:15,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:53:15,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:53:15,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:53:15,185 INFO L87 Difference]: Start difference. First operand 193259 states and 203140 transitions. Second operand has 3 states, 3 states have (on average 152.0) internal successors, (456), 3 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)