./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem13_label43.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 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_label43.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 35560e922bf8333807d0348ddb335d0f345175bbe017d76c2c9d638827ad9537 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 12:21:52,551 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 12:21:52,553 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 12:21:52,589 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 12:21:52,590 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 12:21:52,591 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 12:21:52,593 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 12:21:52,597 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 12:21:52,598 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 12:21:52,602 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 12:21:52,603 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 12:21:52,605 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 12:21:52,605 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 12:21:52,607 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 12:21:52,608 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 12:21:52,612 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 12:21:52,612 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 12:21:52,614 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 12:21:52,616 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 12:21:52,620 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 12:21:52,622 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 12:21:52,623 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 12:21:52,624 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 12:21:52,625 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 12:21:52,627 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 12:21:52,634 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 12:21:52,634 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 12:21:52,635 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 12:21:52,636 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 12:21:52,636 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 12:21:52,637 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 12:21:52,638 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 12:21:52,639 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 12:21:52,639 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 12:21:52,640 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 12:21:52,641 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 12:21:52,641 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 12:21:52,642 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 12:21:52,642 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 12:21:52,642 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 12:21:52,643 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 12:21:52,645 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 12:21:52,646 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 12:21:52,676 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 12:21:52,676 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 12:21:52,676 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 12:21:52,677 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 12:21:52,677 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 12:21:52,677 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 12:21:52,678 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 12:21:52,678 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 12:21:52,678 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 12:21:52,679 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 12:21:52,679 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 12:21:52,680 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 12:21:52,680 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 12:21:52,680 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 12:21:52,680 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 12:21:52,680 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 12:21:52,680 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 12:21:52,681 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 12:21:52,681 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 12:21:52,681 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 12:21:52,681 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 12:21:52,681 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 12:21:52,682 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 12:21:52,682 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 12:21:52,682 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 12:21:52,682 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 12:21:52,682 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 12:21:52,682 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 12:21:52,683 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 12:21:52,683 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 12:21:52,683 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 12:21:52,683 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 12:21:52,683 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 12:21:52,684 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 35560e922bf8333807d0348ddb335d0f345175bbe017d76c2c9d638827ad9537 [2022-07-19 12:21:52,895 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 12:21:52,916 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 12:21:52,920 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 12:21:52,920 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 12:21:52,921 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 12:21:52,922 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label43.c [2022-07-19 12:21:52,979 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a5ba1d06/e9962fc6c35847a9ad0abb73c1cd4600/FLAG6ec50b9ef [2022-07-19 12:21:53,720 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 12:21:53,721 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label43.c [2022-07-19 12:21:53,755 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a5ba1d06/e9962fc6c35847a9ad0abb73c1cd4600/FLAG6ec50b9ef [2022-07-19 12:21:53,955 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a5ba1d06/e9962fc6c35847a9ad0abb73c1cd4600 [2022-07-19 12:21:53,957 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 12:21:53,959 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 12:21:53,963 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 12:21:53,963 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 12:21:53,966 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 12:21:53,966 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 12:21:53" (1/1) ... [2022-07-19 12:21:53,967 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e8d9e80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:21:53, skipping insertion in model container [2022-07-19 12:21:53,968 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 12:21:53" (1/1) ... [2022-07-19 12:21:53,973 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 12:21:54,081 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 12:21:54,333 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_label43.c[2870,2883] [2022-07-19 12:21:55,207 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 12:21:55,216 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 12:21:55,244 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_label43.c[2870,2883] [2022-07-19 12:21:55,673 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 12:21:55,693 INFO L208 MainTranslator]: Completed translation [2022-07-19 12:21:55,694 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:21:55 WrapperNode [2022-07-19 12:21:55,694 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 12:21:55,696 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 12:21:55,696 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 12:21:55,696 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 12:21:55,702 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:21:55" (1/1) ... [2022-07-19 12:21:55,781 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:21:55" (1/1) ... [2022-07-19 12:21:56,325 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2022-07-19 12:21:56,339 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 12:21:56,340 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 12:21:56,340 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 12:21:56,340 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 12:21:56,349 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:21:55" (1/1) ... [2022-07-19 12:21:56,363 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:21:55" (1/1) ... [2022-07-19 12:21:56,470 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:21:55" (1/1) ... [2022-07-19 12:21:56,471 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:21:55" (1/1) ... [2022-07-19 12:21:56,765 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:21:55" (1/1) ... [2022-07-19 12:21:56,867 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:21:55" (1/1) ... [2022-07-19 12:21:56,951 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:21:55" (1/1) ... [2022-07-19 12:21:57,019 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 12:21:57,020 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 12:21:57,020 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 12:21:57,021 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 12:21:57,021 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:21:55" (1/1) ... [2022-07-19 12:21:57,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 12:21:57,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 12:21:57,053 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) [2022-07-19 12:21:57,067 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 [2022-07-19 12:21:57,093 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 12:21:57,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 12:21:57,093 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 12:21:57,093 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 12:21:57,151 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 12:21:57,152 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 12:22:01,614 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 12:22:01,628 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 12:22:01,629 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-19 12:22:01,631 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 12:22:01 BoogieIcfgContainer [2022-07-19 12:22:01,631 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 12:22:01,633 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 12:22:01,633 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 12:22:01,636 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 12:22:01,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 12:21:53" (1/3) ... [2022-07-19 12:22:01,636 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19048dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 12:22:01, skipping insertion in model container [2022-07-19 12:22:01,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:21:55" (2/3) ... [2022-07-19 12:22:01,637 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19048dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 12:22:01, skipping insertion in model container [2022-07-19 12:22:01,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 12:22:01" (3/3) ... [2022-07-19 12:22:01,638 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label43.c [2022-07-19 12:22:01,649 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 12:22:01,650 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 12:22:01,707 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 12:22:01,713 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@78a424ca, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@33f389b2 [2022-07-19 12:22:01,713 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 12:22:01,720 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) [2022-07-19 12:22:01,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-19 12:22:01,725 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:22:01,725 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:22:01,726 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:22:01,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:22:01,730 INFO L85 PathProgramCache]: Analyzing trace with hash 567305786, now seen corresponding path program 1 times [2022-07-19 12:22:01,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:22:01,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114194976] [2022-07-19 12:22:01,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:22:01,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:22:01,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:22:01,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 12:22:01,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:22:01,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114194976] [2022-07-19 12:22:01,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114194976] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:22:01,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:22:01,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 12:22:01,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767260094] [2022-07-19 12:22:01,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:22:01,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:22:01,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:22:01,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:22:01,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:22:01,984 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 6.0) internal successors, (18), 2 states have internal predecessors, (18), 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) [2022-07-19 12:22:05,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:22:05,936 INFO L93 Difference]: Finished difference Result 3035 states and 5643 transitions. [2022-07-19 12:22:05,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:22:05,938 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 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 18 [2022-07-19 12:22:05,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:22:05,962 INFO L225 Difference]: With dead ends: 3035 [2022-07-19 12:22:05,963 INFO L226 Difference]: Without dead ends: 1873 [2022-07-19 12:22:05,968 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 [2022-07-19 12:22:05,971 INFO L413 NwaCegarLoop]: 991 mSDtfsCounter, 887 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 2505 mSolverCounterSat, 858 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 887 SdHoareTripleChecker+Valid, 1145 SdHoareTripleChecker+Invalid, 3363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 858 IncrementalHoareTripleChecker+Valid, 2505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-07-19 12:22:05,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [887 Valid, 1145 Invalid, 3363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [858 Valid, 2505 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-07-19 12:22:05,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1873 states. [2022-07-19 12:22:06,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1873 to 1859. [2022-07-19 12:22:06,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1859 states, 1858 states have (on average 1.5441334768568353) internal successors, (2869), 1858 states have internal predecessors, (2869), 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) [2022-07-19 12:22:06,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1859 states to 1859 states and 2869 transitions. [2022-07-19 12:22:06,073 INFO L78 Accepts]: Start accepts. Automaton has 1859 states and 2869 transitions. Word has length 18 [2022-07-19 12:22:06,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:22:06,074 INFO L495 AbstractCegarLoop]: Abstraction has 1859 states and 2869 transitions. [2022-07-19 12:22:06,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 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) [2022-07-19 12:22:06,074 INFO L276 IsEmpty]: Start isEmpty. Operand 1859 states and 2869 transitions. [2022-07-19 12:22:06,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-07-19 12:22:06,076 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:22:06,077 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-19 12:22:06,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 12:22:06,077 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:22:06,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:22:06,078 INFO L85 PathProgramCache]: Analyzing trace with hash -855264667, now seen corresponding path program 1 times [2022-07-19 12:22:06,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:22:06,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842693811] [2022-07-19 12:22:06,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:22:06,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:22:06,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:22:06,274 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 12:22:06,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:22:06,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842693811] [2022-07-19 12:22:06,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842693811] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:22:06,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:22:06,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 12:22:06,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492108059] [2022-07-19 12:22:06,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:22:06,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:22:06,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:22:06,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:22:06,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:22:06,278 INFO L87 Difference]: Start difference. First operand 1859 states and 2869 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 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) [2022-07-19 12:22:09,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:22:09,892 INFO L93 Difference]: Finished difference Result 5317 states and 8229 transitions. [2022-07-19 12:22:09,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:22:09,895 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 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 90 [2022-07-19 12:22:09,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:22:09,908 INFO L225 Difference]: With dead ends: 5317 [2022-07-19 12:22:09,908 INFO L226 Difference]: Without dead ends: 3460 [2022-07-19 12:22:09,911 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 [2022-07-19 12:22:09,912 INFO L413 NwaCegarLoop]: 1039 mSDtfsCounter, 826 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 2402 mSolverCounterSat, 877 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 826 SdHoareTripleChecker+Valid, 1192 SdHoareTripleChecker+Invalid, 3279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 877 IncrementalHoareTripleChecker+Valid, 2402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-07-19 12:22:09,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [826 Valid, 1192 Invalid, 3279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [877 Valid, 2402 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-07-19 12:22:09,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3460 states. [2022-07-19 12:22:09,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3460 to 3459. [2022-07-19 12:22:09,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3459 states, 3458 states have (on average 1.3805668016194332) internal successors, (4774), 3458 states have internal predecessors, (4774), 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) [2022-07-19 12:22:09,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3459 states to 3459 states and 4774 transitions. [2022-07-19 12:22:09,976 INFO L78 Accepts]: Start accepts. Automaton has 3459 states and 4774 transitions. Word has length 90 [2022-07-19 12:22:09,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:22:09,977 INFO L495 AbstractCegarLoop]: Abstraction has 3459 states and 4774 transitions. [2022-07-19 12:22:09,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 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) [2022-07-19 12:22:09,977 INFO L276 IsEmpty]: Start isEmpty. Operand 3459 states and 4774 transitions. [2022-07-19 12:22:09,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-07-19 12:22:09,980 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:22:09,980 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-19 12:22:09,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 12:22:09,981 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:22:09,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:22:09,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1119954532, now seen corresponding path program 1 times [2022-07-19 12:22:09,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:22:09,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713120603] [2022-07-19 12:22:09,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:22:09,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:22:10,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:22:10,179 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 12:22:10,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:22:10,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713120603] [2022-07-19 12:22:10,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713120603] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:22:10,181 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:22:10,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:22:10,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556863938] [2022-07-19 12:22:10,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:22:10,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 12:22:10,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:22:10,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 12:22:10,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 12:22:10,184 INFO L87 Difference]: Start difference. First operand 3459 states and 4774 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 3 states have internal predecessors, (104), 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) [2022-07-19 12:22:14,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:22:14,643 INFO L93 Difference]: Finished difference Result 10870 states and 14768 transitions. [2022-07-19 12:22:14,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 12:22:14,643 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 3 states have internal predecessors, (104), 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 104 [2022-07-19 12:22:14,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:22:14,669 INFO L225 Difference]: With dead ends: 10870 [2022-07-19 12:22:14,670 INFO L226 Difference]: Without dead ends: 7413 [2022-07-19 12:22:14,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 12:22:14,677 INFO L413 NwaCegarLoop]: 709 mSDtfsCounter, 2579 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 4117 mSolverCounterSat, 834 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2579 SdHoareTripleChecker+Valid, 1003 SdHoareTripleChecker+Invalid, 4951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 834 IncrementalHoareTripleChecker+Valid, 4117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-07-19 12:22:14,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2579 Valid, 1003 Invalid, 4951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [834 Valid, 4117 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-07-19 12:22:14,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7413 states. [2022-07-19 12:22:14,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7413 to 7412. [2022-07-19 12:22:14,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7412 states, 7411 states have (on average 1.2698691134799622) internal successors, (9411), 7411 states have internal predecessors, (9411), 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) [2022-07-19 12:22:14,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7412 states to 7412 states and 9411 transitions. [2022-07-19 12:22:14,839 INFO L78 Accepts]: Start accepts. Automaton has 7412 states and 9411 transitions. Word has length 104 [2022-07-19 12:22:14,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:22:14,840 INFO L495 AbstractCegarLoop]: Abstraction has 7412 states and 9411 transitions. [2022-07-19 12:22:14,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 3 states have internal predecessors, (104), 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) [2022-07-19 12:22:14,840 INFO L276 IsEmpty]: Start isEmpty. Operand 7412 states and 9411 transitions. [2022-07-19 12:22:14,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-07-19 12:22:14,851 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:22:14,851 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:22:14,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 12:22:14,851 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:22:14,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:22:14,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1862150574, now seen corresponding path program 1 times [2022-07-19 12:22:14,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:22:14,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791782430] [2022-07-19 12:22:14,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:22:14,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:22:14,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:22:15,033 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-07-19 12:22:15,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:22:15,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791782430] [2022-07-19 12:22:15,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791782430] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:22:15,037 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:22:15,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 12:22:15,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601416621] [2022-07-19 12:22:15,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:22:15,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:22:15,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:22:15,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:22:15,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:22:15,040 INFO L87 Difference]: Start difference. First operand 7412 states and 9411 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 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) [2022-07-19 12:22:18,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:22:18,238 INFO L93 Difference]: Finished difference Result 20357 states and 26252 transitions. [2022-07-19 12:22:18,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:22:18,240 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 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 185 [2022-07-19 12:22:18,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:22:18,277 INFO L225 Difference]: With dead ends: 20357 [2022-07-19 12:22:18,278 INFO L226 Difference]: Without dead ends: 13734 [2022-07-19 12:22:18,289 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 [2022-07-19 12:22:18,290 INFO L413 NwaCegarLoop]: 851 mSDtfsCounter, 889 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 2576 mSolverCounterSat, 747 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 889 SdHoareTripleChecker+Valid, 980 SdHoareTripleChecker+Invalid, 3323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 747 IncrementalHoareTripleChecker+Valid, 2576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-07-19 12:22:18,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [889 Valid, 980 Invalid, 3323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [747 Valid, 2576 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-07-19 12:22:18,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13734 states. [2022-07-19 12:22:18,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13734 to 12937. [2022-07-19 12:22:18,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12937 states, 12936 states have (on average 1.215213358070501) internal successors, (15720), 12936 states have internal predecessors, (15720), 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) [2022-07-19 12:22:18,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12937 states to 12937 states and 15720 transitions. [2022-07-19 12:22:18,526 INFO L78 Accepts]: Start accepts. Automaton has 12937 states and 15720 transitions. Word has length 185 [2022-07-19 12:22:18,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:22:18,527 INFO L495 AbstractCegarLoop]: Abstraction has 12937 states and 15720 transitions. [2022-07-19 12:22:18,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 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) [2022-07-19 12:22:18,528 INFO L276 IsEmpty]: Start isEmpty. Operand 12937 states and 15720 transitions. [2022-07-19 12:22:18,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2022-07-19 12:22:18,530 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:22:18,530 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:22:18,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 12:22:18,531 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:22:18,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:22:18,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1257624322, now seen corresponding path program 1 times [2022-07-19 12:22:18,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:22:18,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126054906] [2022-07-19 12:22:18,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:22:18,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:22:18,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:22:18,687 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 12:22:18,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:22:18,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126054906] [2022-07-19 12:22:18,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126054906] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:22:18,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:22:18,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:22:18,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675864370] [2022-07-19 12:22:18,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:22:18,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:22:18,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:22:18,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:22:18,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:22:18,703 INFO L87 Difference]: Start difference. First operand 12937 states and 15720 transitions. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 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) [2022-07-19 12:22:21,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:22:21,736 INFO L93 Difference]: Finished difference Result 31392 states and 39119 transitions. [2022-07-19 12:22:21,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:22:21,743 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 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 217 [2022-07-19 12:22:21,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:22:21,777 INFO L225 Difference]: With dead ends: 31392 [2022-07-19 12:22:21,778 INFO L226 Difference]: Without dead ends: 19244 [2022-07-19 12:22:21,791 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 [2022-07-19 12:22:21,792 INFO L413 NwaCegarLoop]: 808 mSDtfsCounter, 860 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 2381 mSolverCounterSat, 914 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 860 SdHoareTripleChecker+Valid, 924 SdHoareTripleChecker+Invalid, 3295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 914 IncrementalHoareTripleChecker+Valid, 2381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-07-19 12:22:21,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [860 Valid, 924 Invalid, 3295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [914 Valid, 2381 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-07-19 12:22:21,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19244 states. [2022-07-19 12:22:21,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19244 to 19235. [2022-07-19 12:22:22,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19235 states, 19234 states have (on average 1.1956431319538317) internal successors, (22997), 19234 states have internal predecessors, (22997), 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) [2022-07-19 12:22:22,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19235 states to 19235 states and 22997 transitions. [2022-07-19 12:22:22,049 INFO L78 Accepts]: Start accepts. Automaton has 19235 states and 22997 transitions. Word has length 217 [2022-07-19 12:22:22,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:22:22,051 INFO L495 AbstractCegarLoop]: Abstraction has 19235 states and 22997 transitions. [2022-07-19 12:22:22,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 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) [2022-07-19 12:22:22,054 INFO L276 IsEmpty]: Start isEmpty. Operand 19235 states and 22997 transitions. [2022-07-19 12:22:22,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2022-07-19 12:22:22,059 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:22:22,059 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2022-07-19 12:22:22,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 12:22:22,060 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:22:22,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:22:22,060 INFO L85 PathProgramCache]: Analyzing trace with hash 669304523, now seen corresponding path program 1 times [2022-07-19 12:22:22,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:22:22,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845742185] [2022-07-19 12:22:22,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:22:22,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:22:22,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:22:22,214 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 293 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-19 12:22:22,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:22:22,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845742185] [2022-07-19 12:22:22,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845742185] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:22:22,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:22:22,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:22:22,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223283989] [2022-07-19 12:22:22,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:22:22,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 12:22:22,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:22:22,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 12:22:22,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 12:22:22,217 INFO L87 Difference]: Start difference. First operand 19235 states and 22997 transitions. Second operand has 4 states, 4 states have (on average 71.5) internal successors, (286), 3 states have internal predecessors, (286), 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) [2022-07-19 12:22:28,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:22:28,363 INFO L93 Difference]: Finished difference Result 71737 states and 86317 transitions. [2022-07-19 12:22:28,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 12:22:28,364 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 71.5) internal successors, (286), 3 states have internal predecessors, (286), 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 301 [2022-07-19 12:22:28,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:22:28,442 INFO L225 Difference]: With dead ends: 71737 [2022-07-19 12:22:28,443 INFO L226 Difference]: Without dead ends: 53291 [2022-07-19 12:22:28,467 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 [2022-07-19 12:22:28,468 INFO L413 NwaCegarLoop]: 488 mSDtfsCounter, 1737 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 6063 mSolverCounterSat, 1189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1737 SdHoareTripleChecker+Valid, 689 SdHoareTripleChecker+Invalid, 7252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1189 IncrementalHoareTripleChecker+Valid, 6063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-07-19 12:22:28,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1737 Valid, 689 Invalid, 7252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1189 Valid, 6063 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2022-07-19 12:22:28,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53291 states. [2022-07-19 12:22:28,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53291 to 50023. [2022-07-19 12:22:29,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50023 states, 50022 states have (on average 1.176662268601815) internal successors, (58859), 50022 states have internal predecessors, (58859), 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) [2022-07-19 12:22:29,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50023 states to 50023 states and 58859 transitions. [2022-07-19 12:22:29,105 INFO L78 Accepts]: Start accepts. Automaton has 50023 states and 58859 transitions. Word has length 301 [2022-07-19 12:22:29,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:22:29,106 INFO L495 AbstractCegarLoop]: Abstraction has 50023 states and 58859 transitions. [2022-07-19 12:22:29,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.5) internal successors, (286), 3 states have internal predecessors, (286), 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) [2022-07-19 12:22:29,106 INFO L276 IsEmpty]: Start isEmpty. Operand 50023 states and 58859 transitions. [2022-07-19 12:22:29,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2022-07-19 12:22:29,112 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:22:29,112 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2022-07-19 12:22:29,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 12:22:29,113 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:22:29,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:22:29,113 INFO L85 PathProgramCache]: Analyzing trace with hash 143314799, now seen corresponding path program 1 times [2022-07-19 12:22:29,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:22:29,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824995629] [2022-07-19 12:22:29,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:22:29,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:22:29,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:22:29,253 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 238 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-07-19 12:22:29,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:22:29,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824995629] [2022-07-19 12:22:29,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824995629] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:22:29,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:22:29,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 12:22:29,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097572230] [2022-07-19 12:22:29,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:22:29,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:22:29,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:22:29,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:22:29,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:22:29,256 INFO L87 Difference]: Start difference. First operand 50023 states and 58859 transitions. Second operand has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 2 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) [2022-07-19 12:22:32,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:22:32,517 INFO L93 Difference]: Finished difference Result 110298 states and 129457 transitions. [2022-07-19 12:22:32,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:22:32,517 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 2 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 344 [2022-07-19 12:22:32,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:22:32,644 INFO L225 Difference]: With dead ends: 110298 [2022-07-19 12:22:32,645 INFO L226 Difference]: Without dead ends: 61064 [2022-07-19 12:22:32,691 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 [2022-07-19 12:22:32,692 INFO L413 NwaCegarLoop]: 1021 mSDtfsCounter, 730 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 2706 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 730 SdHoareTripleChecker+Valid, 1202 SdHoareTripleChecker+Invalid, 2886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 2706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-07-19 12:22:32,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [730 Valid, 1202 Invalid, 2886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 2706 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-07-19 12:22:32,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61064 states. [2022-07-19 12:22:33,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61064 to 61054. [2022-07-19 12:22:33,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61054 states, 61053 states have (on average 1.157387843349221) internal successors, (70662), 61053 states have internal predecessors, (70662), 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) [2022-07-19 12:22:33,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61054 states to 61054 states and 70662 transitions. [2022-07-19 12:22:33,393 INFO L78 Accepts]: Start accepts. Automaton has 61054 states and 70662 transitions. Word has length 344 [2022-07-19 12:22:33,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:22:33,394 INFO L495 AbstractCegarLoop]: Abstraction has 61054 states and 70662 transitions. [2022-07-19 12:22:33,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 2 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) [2022-07-19 12:22:33,394 INFO L276 IsEmpty]: Start isEmpty. Operand 61054 states and 70662 transitions. [2022-07-19 12:22:33,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2022-07-19 12:22:33,406 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:22:33,406 INFO L195 NwaCegarLoop]: trace histogram [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, 3, 3, 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] [2022-07-19 12:22:33,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 12:22:33,407 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:22:33,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:22:33,407 INFO L85 PathProgramCache]: Analyzing trace with hash -709045718, now seen corresponding path program 1 times [2022-07-19 12:22:33,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:22:33,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024570184] [2022-07-19 12:22:33,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:22:33,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:22:33,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:22:33,569 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 445 trivial. 0 not checked. [2022-07-19 12:22:33,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:22:33,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024570184] [2022-07-19 12:22:33,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024570184] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:22:33,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:22:33,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:22:33,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517771352] [2022-07-19 12:22:33,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:22:33,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:22:33,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:22:33,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:22:33,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:22:33,572 INFO L87 Difference]: Start difference. First operand 61054 states and 70662 transitions. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 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) [2022-07-19 12:22:37,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:22:37,794 INFO L93 Difference]: Finished difference Result 147482 states and 173541 transitions. [2022-07-19 12:22:37,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:22:37,795 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 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 347 [2022-07-19 12:22:37,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:22:37,968 INFO L225 Difference]: With dead ends: 147482 [2022-07-19 12:22:37,969 INFO L226 Difference]: Without dead ends: 98248 [2022-07-19 12:22:38,006 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 [2022-07-19 12:22:38,008 INFO L413 NwaCegarLoop]: 644 mSDtfsCounter, 1016 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 3028 mSolverCounterSat, 736 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1016 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 3764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 736 IncrementalHoareTripleChecker+Valid, 3028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-07-19 12:22:38,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1016 Valid, 730 Invalid, 3764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [736 Valid, 3028 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-07-19 12:22:38,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98248 states. [2022-07-19 12:22:38,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98248 to 76070. [2022-07-19 12:22:38,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76070 states, 76069 states have (on average 1.1683734504200134) internal successors, (88877), 76069 states have internal predecessors, (88877), 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) [2022-07-19 12:22:39,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76070 states to 76070 states and 88877 transitions. [2022-07-19 12:22:39,209 INFO L78 Accepts]: Start accepts. Automaton has 76070 states and 88877 transitions. Word has length 347 [2022-07-19 12:22:39,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:22:39,210 INFO L495 AbstractCegarLoop]: Abstraction has 76070 states and 88877 transitions. [2022-07-19 12:22:39,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 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) [2022-07-19 12:22:39,210 INFO L276 IsEmpty]: Start isEmpty. Operand 76070 states and 88877 transitions. [2022-07-19 12:22:39,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2022-07-19 12:22:39,216 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:22:39,217 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2022-07-19 12:22:39,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-19 12:22:39,217 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:22:39,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:22:39,218 INFO L85 PathProgramCache]: Analyzing trace with hash 651711769, now seen corresponding path program 1 times [2022-07-19 12:22:39,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:22:39,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391663225] [2022-07-19 12:22:39,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:22:39,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:22:39,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:22:39,668 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 254 proven. 113 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-19 12:22:39,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:22:39,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391663225] [2022-07-19 12:22:39,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391663225] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 12:22:39,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529986604] [2022-07-19 12:22:39,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:22:39,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:22:39,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 12:22:39,672 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) [2022-07-19 12:22:39,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 12:22:39,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:22:39,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 12:22:39,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 12:22:39,914 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2022-07-19 12:22:39,915 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 12:22:39,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529986604] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:22:39,915 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 12:22:39,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2022-07-19 12:22:39,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987980682] [2022-07-19 12:22:39,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:22:39,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:22:39,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:22:39,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:22:39,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-19 12:22:39,917 INFO L87 Difference]: Start difference. First operand 76070 states and 88877 transitions. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 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) [2022-07-19 12:22:43,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:22:43,100 INFO L93 Difference]: Finished difference Result 156052 states and 182968 transitions. [2022-07-19 12:22:43,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:22:43,103 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 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 373 [2022-07-19 12:22:43,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:22:43,251 INFO L225 Difference]: With dead ends: 156052 [2022-07-19 12:22:43,252 INFO L226 Difference]: Without dead ends: 91802 [2022-07-19 12:22:43,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 372 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-19 12:22:43,308 INFO L413 NwaCegarLoop]: 1741 mSDtfsCounter, 900 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 2398 mSolverCounterSat, 464 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 900 SdHoareTripleChecker+Valid, 1871 SdHoareTripleChecker+Invalid, 2862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 464 IncrementalHoareTripleChecker+Valid, 2398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-07-19 12:22:43,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [900 Valid, 1871 Invalid, 2862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [464 Valid, 2398 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-07-19 12:22:43,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91802 states. [2022-07-19 12:22:44,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91802 to 83138. [2022-07-19 12:22:44,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83138 states, 83137 states have (on average 1.159171006892238) internal successors, (96370), 83137 states have internal predecessors, (96370), 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) [2022-07-19 12:22:44,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83138 states to 83138 states and 96370 transitions. [2022-07-19 12:22:44,541 INFO L78 Accepts]: Start accepts. Automaton has 83138 states and 96370 transitions. Word has length 373 [2022-07-19 12:22:44,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:22:44,542 INFO L495 AbstractCegarLoop]: Abstraction has 83138 states and 96370 transitions. [2022-07-19 12:22:44,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 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) [2022-07-19 12:22:44,542 INFO L276 IsEmpty]: Start isEmpty. Operand 83138 states and 96370 transitions. [2022-07-19 12:22:44,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2022-07-19 12:22:44,549 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:22:44,549 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2022-07-19 12:22:44,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 12:22:44,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:22:44,764 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:22:44,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:22:44,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1045689510, now seen corresponding path program 1 times [2022-07-19 12:22:44,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:22:44,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795980770] [2022-07-19 12:22:44,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:22:44,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:22:44,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:22:45,072 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 392 proven. 0 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2022-07-19 12:22:45,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:22:45,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795980770] [2022-07-19 12:22:45,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795980770] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:22:45,073 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:22:45,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:22:45,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587119493] [2022-07-19 12:22:45,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:22:45,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:22:45,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:22:45,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:22:45,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:22:45,075 INFO L87 Difference]: Start difference. First operand 83138 states and 96370 transitions. Second operand has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 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) [2022-07-19 12:22:48,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:22:48,282 INFO L93 Difference]: Finished difference Result 167857 states and 194340 transitions. [2022-07-19 12:22:48,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:22:48,283 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 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 417 [2022-07-19 12:22:48,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:22:48,392 INFO L225 Difference]: With dead ends: 167857 [2022-07-19 12:22:48,392 INFO L226 Difference]: Without dead ends: 85508 [2022-07-19 12:22:48,413 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 [2022-07-19 12:22:48,414 INFO L413 NwaCegarLoop]: 1379 mSDtfsCounter, 900 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 2481 mSolverCounterSat, 626 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 900 SdHoareTripleChecker+Valid, 1470 SdHoareTripleChecker+Invalid, 3107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 626 IncrementalHoareTripleChecker+Valid, 2481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-07-19 12:22:48,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [900 Valid, 1470 Invalid, 3107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [626 Valid, 2481 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-07-19 12:22:48,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85508 states. [2022-07-19 12:22:49,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85508 to 83130. [2022-07-19 12:22:49,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83130 states, 83129 states have (on average 1.1257443250851087) internal successors, (93582), 83129 states have internal predecessors, (93582), 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) [2022-07-19 12:22:49,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83130 states to 83130 states and 93582 transitions. [2022-07-19 12:22:49,333 INFO L78 Accepts]: Start accepts. Automaton has 83130 states and 93582 transitions. Word has length 417 [2022-07-19 12:22:49,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:22:49,333 INFO L495 AbstractCegarLoop]: Abstraction has 83130 states and 93582 transitions. [2022-07-19 12:22:49,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 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) [2022-07-19 12:22:49,334 INFO L276 IsEmpty]: Start isEmpty. Operand 83130 states and 93582 transitions. [2022-07-19 12:22:49,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2022-07-19 12:22:49,343 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:22:49,343 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:22:49,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-19 12:22:49,344 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:22:49,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:22:49,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1410029894, now seen corresponding path program 1 times [2022-07-19 12:22:49,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:22:49,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799054097] [2022-07-19 12:22:49,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:22:49,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:22:49,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:22:49,683 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 397 proven. 113 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2022-07-19 12:22:49,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:22:49,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799054097] [2022-07-19 12:22:49,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799054097] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 12:22:49,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926479459] [2022-07-19 12:22:49,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:22:49,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:22:49,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 12:22:49,686 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) [2022-07-19 12:22:49,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 12:22:49,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:22:49,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 624 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 12:22:49,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 12:22:50,106 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 429 proven. 0 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2022-07-19 12:22:50,107 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 12:22:50,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926479459] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:22:50,107 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 12:22:50,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2022-07-19 12:22:50,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797376200] [2022-07-19 12:22:50,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:22:50,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:22:50,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:22:50,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:22:50,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-19 12:22:50,110 INFO L87 Difference]: Start difference. First operand 83130 states and 93582 transitions. Second operand has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 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) [2022-07-19 12:22:53,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:22:53,173 INFO L93 Difference]: Finished difference Result 165470 states and 186370 transitions. [2022-07-19 12:22:53,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:22:53,174 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 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 443 [2022-07-19 12:22:53,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:22:53,261 INFO L225 Difference]: With dead ends: 165470 [2022-07-19 12:22:53,261 INFO L226 Difference]: Without dead ends: 83129 [2022-07-19 12:22:53,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 442 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-19 12:22:53,296 INFO L413 NwaCegarLoop]: 1353 mSDtfsCounter, 1103 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 2461 mSolverCounterSat, 448 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1103 SdHoareTripleChecker+Valid, 1435 SdHoareTripleChecker+Invalid, 2909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 448 IncrementalHoareTripleChecker+Valid, 2461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-07-19 12:22:53,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1103 Valid, 1435 Invalid, 2909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [448 Valid, 2461 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-07-19 12:22:53,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83129 states. [2022-07-19 12:22:54,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83129 to 82340. [2022-07-19 12:22:54,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82340 states, 82339 states have (on average 1.0993696790099468) internal successors, (90521), 82339 states have internal predecessors, (90521), 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) [2022-07-19 12:22:54,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82340 states to 82340 states and 90521 transitions. [2022-07-19 12:22:54,262 INFO L78 Accepts]: Start accepts. Automaton has 82340 states and 90521 transitions. Word has length 443 [2022-07-19 12:22:54,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:22:54,262 INFO L495 AbstractCegarLoop]: Abstraction has 82340 states and 90521 transitions. [2022-07-19 12:22:54,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 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) [2022-07-19 12:22:54,263 INFO L276 IsEmpty]: Start isEmpty. Operand 82340 states and 90521 transitions. [2022-07-19 12:22:54,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2022-07-19 12:22:54,274 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:22:54,275 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2022-07-19 12:22:54,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 12:22:54,498 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,SelfDestructingSolverStorable10 [2022-07-19 12:22:54,499 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:22:54,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:22:54,499 INFO L85 PathProgramCache]: Analyzing trace with hash 2001880031, now seen corresponding path program 1 times [2022-07-19 12:22:54,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:22:54,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346195702] [2022-07-19 12:22:54,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:22:54,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:22:54,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:22:54,714 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 407 proven. 0 refuted. 0 times theorem prover too weak. 445 trivial. 0 not checked. [2022-07-19 12:22:54,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:22:54,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346195702] [2022-07-19 12:22:54,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346195702] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:22:54,715 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:22:54,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:22:54,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284668039] [2022-07-19 12:22:54,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:22:54,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:22:54,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:22:54,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:22:54,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:22:54,718 INFO L87 Difference]: Start difference. First operand 82340 states and 90521 transitions. Second operand has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 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) [2022-07-19 12:22:57,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:22:57,931 INFO L93 Difference]: Finished difference Result 164653 states and 180876 transitions. [2022-07-19 12:22:57,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:22:57,934 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 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 488 [2022-07-19 12:22:57,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:22:58,048 INFO L225 Difference]: With dead ends: 164653 [2022-07-19 12:22:58,048 INFO L226 Difference]: Without dead ends: 83102 [2022-07-19 12:22:58,092 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 [2022-07-19 12:22:58,092 INFO L413 NwaCegarLoop]: 1490 mSDtfsCounter, 976 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 2346 mSolverCounterSat, 590 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 976 SdHoareTripleChecker+Valid, 1618 SdHoareTripleChecker+Invalid, 2936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 590 IncrementalHoareTripleChecker+Valid, 2346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-07-19 12:22:58,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [976 Valid, 1618 Invalid, 2936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [590 Valid, 2346 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-07-19 12:22:58,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83102 states. [2022-07-19 12:22:59,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83102 to 79156. [2022-07-19 12:22:59,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79156 states, 79155 states have (on average 1.0711389046806898) internal successors, (84786), 79155 states have internal predecessors, (84786), 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) [2022-07-19 12:22:59,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79156 states to 79156 states and 84786 transitions. [2022-07-19 12:22:59,112 INFO L78 Accepts]: Start accepts. Automaton has 79156 states and 84786 transitions. Word has length 488 [2022-07-19 12:22:59,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:22:59,113 INFO L495 AbstractCegarLoop]: Abstraction has 79156 states and 84786 transitions. [2022-07-19 12:22:59,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 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) [2022-07-19 12:22:59,113 INFO L276 IsEmpty]: Start isEmpty. Operand 79156 states and 84786 transitions. [2022-07-19 12:22:59,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 553 [2022-07-19 12:22:59,124 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:22:59,124 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2022-07-19 12:22:59,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-19 12:22:59,124 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:22:59,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:22:59,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1100417008, now seen corresponding path program 1 times [2022-07-19 12:22:59,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:22:59,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883661722] [2022-07-19 12:22:59,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:22:59,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:22:59,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:22:59,295 INFO L134 CoverageAnalysis]: Checked inductivity of 971 backedges. 683 proven. 0 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-07-19 12:22:59,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:22:59,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883661722] [2022-07-19 12:22:59,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883661722] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:22:59,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:22:59,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:22:59,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413909914] [2022-07-19 12:22:59,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:22:59,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:22:59,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:22:59,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:22:59,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:22:59,298 INFO L87 Difference]: Start difference. First operand 79156 states and 84786 transitions. Second operand has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 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) [2022-07-19 12:23:02,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:23:02,867 INFO L93 Difference]: Finished difference Result 186662 states and 200609 transitions. [2022-07-19 12:23:02,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:23:02,867 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 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 552 [2022-07-19 12:23:02,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:23:02,998 INFO L225 Difference]: With dead ends: 186662 [2022-07-19 12:23:02,998 INFO L226 Difference]: Without dead ends: 105144 [2022-07-19 12:23:03,054 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 [2022-07-19 12:23:03,055 INFO L413 NwaCegarLoop]: 1731 mSDtfsCounter, 784 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 2515 mSolverCounterSat, 462 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 784 SdHoareTripleChecker+Valid, 1873 SdHoareTripleChecker+Invalid, 2977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 462 IncrementalHoareTripleChecker+Valid, 2515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-07-19 12:23:03,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [784 Valid, 1873 Invalid, 2977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [462 Valid, 2515 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-07-19 12:23:03,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105144 states. [2022-07-19 12:23:04,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105144 to 105123. [2022-07-19 12:23:04,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105123 states, 105122 states have (on average 1.0610814101710393) internal successors, (111543), 105122 states have internal predecessors, (111543), 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) [2022-07-19 12:23:04,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105123 states to 105123 states and 111543 transitions. [2022-07-19 12:23:04,473 INFO L78 Accepts]: Start accepts. Automaton has 105123 states and 111543 transitions. Word has length 552 [2022-07-19 12:23:04,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:23:04,473 INFO L495 AbstractCegarLoop]: Abstraction has 105123 states and 111543 transitions. [2022-07-19 12:23:04,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 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) [2022-07-19 12:23:04,473 INFO L276 IsEmpty]: Start isEmpty. Operand 105123 states and 111543 transitions. [2022-07-19 12:23:04,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 562 [2022-07-19 12:23:04,486 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:23:04,486 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 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] [2022-07-19 12:23:04,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-19 12:23:04,487 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:23:04,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:23:04,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1835777825, now seen corresponding path program 1 times [2022-07-19 12:23:04,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:23:04,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577949832] [2022-07-19 12:23:04,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:23:04,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:23:04,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:23:04,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1222 backedges. 880 proven. 0 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2022-07-19 12:23:04,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:23:04,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577949832] [2022-07-19 12:23:04,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577949832] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:23:04,666 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:23:04,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:23:04,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101843299] [2022-07-19 12:23:04,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:23:04,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:23:04,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:23:04,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:23:04,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:23:04,670 INFO L87 Difference]: Start difference. First operand 105123 states and 111543 transitions. Second operand has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 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) [2022-07-19 12:23:08,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:23:08,568 INFO L93 Difference]: Finished difference Result 234670 states and 250703 transitions. [2022-07-19 12:23:08,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:23:08,569 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 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 561 [2022-07-19 12:23:08,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:23:08,722 INFO L225 Difference]: With dead ends: 234670 [2022-07-19 12:23:08,722 INFO L226 Difference]: Without dead ends: 142939 [2022-07-19 12:23:08,778 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 [2022-07-19 12:23:08,779 INFO L413 NwaCegarLoop]: 617 mSDtfsCounter, 1008 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 2463 mSolverCounterSat, 945 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1008 SdHoareTripleChecker+Valid, 697 SdHoareTripleChecker+Invalid, 3408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 945 IncrementalHoareTripleChecker+Valid, 2463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-07-19 12:23:08,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1008 Valid, 697 Invalid, 3408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [945 Valid, 2463 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-07-19 12:23:08,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142939 states. [2022-07-19 12:23:10,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142939 to 142935. [2022-07-19 12:23:10,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142935 states, 142934 states have (on average 1.0635188268711433) internal successors, (152013), 142934 states have internal predecessors, (152013), 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) [2022-07-19 12:23:10,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142935 states to 142935 states and 152013 transitions. [2022-07-19 12:23:10,636 INFO L78 Accepts]: Start accepts. Automaton has 142935 states and 152013 transitions. Word has length 561 [2022-07-19 12:23:10,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:23:10,637 INFO L495 AbstractCegarLoop]: Abstraction has 142935 states and 152013 transitions. [2022-07-19 12:23:10,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 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) [2022-07-19 12:23:10,637 INFO L276 IsEmpty]: Start isEmpty. Operand 142935 states and 152013 transitions. [2022-07-19 12:23:10,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 595 [2022-07-19 12:23:10,654 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:23:10,654 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:23:10,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-19 12:23:10,654 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:23:10,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:23:10,655 INFO L85 PathProgramCache]: Analyzing trace with hash -821332607, now seen corresponding path program 1 times [2022-07-19 12:23:10,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:23:10,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895731452] [2022-07-19 12:23:10,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:23:10,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:23:10,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:23:10,824 INFO L134 CoverageAnalysis]: Checked inductivity of 580 backedges. 476 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-07-19 12:23:10,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:23:10,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895731452] [2022-07-19 12:23:10,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895731452] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:23:10,825 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:23:10,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:23:10,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601034434] [2022-07-19 12:23:10,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:23:10,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:23:10,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:23:10,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:23:10,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:23:10,827 INFO L87 Difference]: Start difference. First operand 142935 states and 152013 transitions. Second operand has 3 states, 3 states have (on average 164.0) internal successors, (492), 3 states have internal predecessors, (492), 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) [2022-07-19 12:23:15,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:23:15,004 INFO L93 Difference]: Finished difference Result 317350 states and 338639 transitions. [2022-07-19 12:23:15,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:23:15,007 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 164.0) internal successors, (492), 3 states have internal predecessors, (492), 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 594 [2022-07-19 12:23:15,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:23:15,233 INFO L225 Difference]: With dead ends: 317350 [2022-07-19 12:23:15,233 INFO L226 Difference]: Without dead ends: 175204 [2022-07-19 12:23:15,300 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 [2022-07-19 12:23:15,300 INFO L413 NwaCegarLoop]: 696 mSDtfsCounter, 930 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 2367 mSolverCounterSat, 793 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 930 SdHoareTripleChecker+Valid, 776 SdHoareTripleChecker+Invalid, 3160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 793 IncrementalHoareTripleChecker+Valid, 2367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-07-19 12:23:15,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [930 Valid, 776 Invalid, 3160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [793 Valid, 2367 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-07-19 12:23:15,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175204 states. [2022-07-19 12:23:17,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175204 to 172034. [2022-07-19 12:23:17,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172034 states, 172033 states have (on average 1.06079066225666) internal successors, (182491), 172033 states have internal predecessors, (182491), 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) [2022-07-19 12:23:17,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172034 states to 172034 states and 182491 transitions. [2022-07-19 12:23:17,441 INFO L78 Accepts]: Start accepts. Automaton has 172034 states and 182491 transitions. Word has length 594 [2022-07-19 12:23:17,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:23:17,441 INFO L495 AbstractCegarLoop]: Abstraction has 172034 states and 182491 transitions. [2022-07-19 12:23:17,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 164.0) internal successors, (492), 3 states have internal predecessors, (492), 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) [2022-07-19 12:23:17,441 INFO L276 IsEmpty]: Start isEmpty. Operand 172034 states and 182491 transitions. [2022-07-19 12:23:17,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 602 [2022-07-19 12:23:17,458 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:23:17,459 INFO L195 NwaCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:23:17,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-19 12:23:17,459 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:23:17,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:23:17,460 INFO L85 PathProgramCache]: Analyzing trace with hash 73241686, now seen corresponding path program 1 times [2022-07-19 12:23:17,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:23:17,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540306260] [2022-07-19 12:23:17,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:23:17,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:23:17,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:23:17,817 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 269 proven. 113 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-19 12:23:17,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:23:17,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540306260] [2022-07-19 12:23:17,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540306260] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 12:23:17,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060590806] [2022-07-19 12:23:17,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:23:17,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:23:17,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 12:23:17,819 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) [2022-07-19 12:23:17,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 12:23:17,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:23:17,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 756 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 12:23:17,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 12:23:18,707 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 285 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-07-19 12:23:18,708 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 12:23:18,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060590806] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:23:18,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 12:23:18,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2022-07-19 12:23:18,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405311109] [2022-07-19 12:23:18,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:23:18,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:23:18,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:23:18,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:23:18,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-19 12:23:18,709 INFO L87 Difference]: Start difference. First operand 172034 states and 182491 transitions. Second operand has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 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) [2022-07-19 12:23:22,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:23:22,335 INFO L93 Difference]: Finished difference Result 331426 states and 352144 transitions. [2022-07-19 12:23:22,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:23:22,336 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 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 [2022-07-19 12:23:22,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:23:22,546 INFO L225 Difference]: With dead ends: 331426 [2022-07-19 12:23:22,547 INFO L226 Difference]: Without dead ends: 175928 [2022-07-19 12:23:22,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 607 GetRequests, 600 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-19 12:23:22,625 INFO L413 NwaCegarLoop]: 351 mSDtfsCounter, 973 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 2252 mSolverCounterSat, 737 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 973 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 2989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 737 IncrementalHoareTripleChecker+Valid, 2252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-07-19 12:23:22,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [973 Valid, 363 Invalid, 2989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [737 Valid, 2252 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-07-19 12:23:22,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175928 states. [2022-07-19 12:23:24,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175928 to 174354. [2022-07-19 12:23:24,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174354 states, 174353 states have (on average 1.0524854748699477) internal successors, (183504), 174353 states have internal predecessors, (183504), 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) [2022-07-19 12:23:24,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174354 states to 174354 states and 183504 transitions. [2022-07-19 12:23:24,870 INFO L78 Accepts]: Start accepts. Automaton has 174354 states and 183504 transitions. Word has length 601 [2022-07-19 12:23:24,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:23:24,871 INFO L495 AbstractCegarLoop]: Abstraction has 174354 states and 183504 transitions. [2022-07-19 12:23:24,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 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) [2022-07-19 12:23:24,871 INFO L276 IsEmpty]: Start isEmpty. Operand 174354 states and 183504 transitions. [2022-07-19 12:23:24,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 624 [2022-07-19 12:23:24,888 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:23:24,888 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:23:24,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 12:23:25,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:23:25,091 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:23:25,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:23:25,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1117854011, now seen corresponding path program 1 times [2022-07-19 12:23:25,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:23:25,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58381950] [2022-07-19 12:23:25,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:23:25,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:23:25,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:23:25,276 INFO L134 CoverageAnalysis]: Checked inductivity of 682 backedges. 542 proven. 0 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-07-19 12:23:25,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:23:25,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58381950] [2022-07-19 12:23:25,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58381950] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:23:25,277 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:23:25,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:23:25,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853797751] [2022-07-19 12:23:25,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:23:25,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:23:25,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:23:25,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:23:25,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:23:25,279 INFO L87 Difference]: Start difference. First operand 174354 states and 183504 transitions. Second operand has 3 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 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) [2022-07-19 12:23:29,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:23:29,000 INFO L93 Difference]: Finished difference Result 343192 states and 361173 transitions. [2022-07-19 12:23:29,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:23:29,001 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 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 623 [2022-07-19 12:23:29,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:23:29,187 INFO L225 Difference]: With dead ends: 343192 [2022-07-19 12:23:29,188 INFO L226 Difference]: Without dead ends: 169627 [2022-07-19 12:23:29,705 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 [2022-07-19 12:23:29,716 INFO L413 NwaCegarLoop]: 1659 mSDtfsCounter, 791 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 2435 mSolverCounterSat, 398 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 791 SdHoareTripleChecker+Valid, 1791 SdHoareTripleChecker+Invalid, 2833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 398 IncrementalHoareTripleChecker+Valid, 2435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-07-19 12:23:29,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [791 Valid, 1791 Invalid, 2833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [398 Valid, 2435 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-07-19 12:23:29,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169627 states. [2022-07-19 12:23:31,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169627 to 166471. [2022-07-19 12:23:31,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166471 states, 166470 states have (on average 1.043124887367093) internal successors, (173649), 166470 states have internal predecessors, (173649), 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)