./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem03_label12.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 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/Problem03_label12.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 8d17ef4c86a3b9aaad0f3756316af6b356203f50f5a16d9fd49cf45964daad71 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 10:26:12,481 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 10:26:12,484 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 10:26:12,538 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 10:26:12,538 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 10:26:12,542 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 10:26:12,543 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 10:26:12,546 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 10:26:12,548 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 10:26:12,554 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 10:26:12,555 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 10:26:12,556 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 10:26:12,556 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 10:26:12,559 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 10:26:12,560 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 10:26:12,563 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 10:26:12,564 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 10:26:12,565 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 10:26:12,567 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 10:26:12,571 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 10:26:12,572 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 10:26:12,573 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 10:26:12,575 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 10:26:12,576 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 10:26:12,583 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 10:26:12,584 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 10:26:12,584 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 10:26:12,585 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 10:26:12,586 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 10:26:12,587 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 10:26:12,587 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 10:26:12,588 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 10:26:12,589 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 10:26:12,590 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 10:26:12,591 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 10:26:12,591 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 10:26:12,592 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 10:26:12,592 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 10:26:12,592 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 10:26:12,593 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 10:26:12,594 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 10:26:12,595 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 10:26:12,624 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 10:26:12,624 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 10:26:12,625 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 10:26:12,625 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 10:26:12,626 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 10:26:12,626 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 10:26:12,627 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 10:26:12,627 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 10:26:12,627 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 10:26:12,627 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 10:26:12,628 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 10:26:12,628 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 10:26:12,628 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 10:26:12,629 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 10:26:12,629 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 10:26:12,629 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 10:26:12,629 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 10:26:12,629 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 10:26:12,629 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 10:26:12,630 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 10:26:12,630 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 10:26:12,630 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 10:26:12,630 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 10:26:12,630 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 10:26:12,631 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 10:26:12,631 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 10:26:12,631 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 10:26:12,631 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 10:26:12,631 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 10:26:12,632 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 10:26:12,632 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 10:26:12,632 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 10:26:12,632 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 10:26:12,632 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 10:26:12,633 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d17ef4c86a3b9aaad0f3756316af6b356203f50f5a16d9fd49cf45964daad71 [2021-12-21 10:26:12,860 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 10:26:12,882 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 10:26:12,885 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 10:26:12,886 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 10:26:12,886 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 10:26:12,888 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label12.c [2021-12-21 10:26:12,956 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f38b91dd/95b2b6c1ec864e47b97ef438c56e8bd4/FLAGc34c3bb40 [2021-12-21 10:26:13,568 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 10:26:13,574 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label12.c [2021-12-21 10:26:13,595 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f38b91dd/95b2b6c1ec864e47b97ef438c56e8bd4/FLAGc34c3bb40 [2021-12-21 10:26:13,955 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f38b91dd/95b2b6c1ec864e47b97ef438c56e8bd4 [2021-12-21 10:26:13,957 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 10:26:13,958 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 10:26:13,960 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 10:26:13,960 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 10:26:13,962 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 10:26:13,963 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:26:13" (1/1) ... [2021-12-21 10:26:13,964 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c82a79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:26:13, skipping insertion in model container [2021-12-21 10:26:13,964 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:26:13" (1/1) ... [2021-12-21 10:26:13,970 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 10:26:14,022 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 10:26:14,469 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/Problem03_label12.c[56222,56235] [2021-12-21 10:26:14,503 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 10:26:14,511 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 10:26:14,694 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/Problem03_label12.c[56222,56235] [2021-12-21 10:26:14,707 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 10:26:14,724 INFO L208 MainTranslator]: Completed translation [2021-12-21 10:26:14,724 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:26:14 WrapperNode [2021-12-21 10:26:14,724 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 10:26:14,725 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 10:26:14,725 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 10:26:14,726 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 10:26:14,734 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:26:14" (1/1) ... [2021-12-21 10:26:14,764 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:26:14" (1/1) ... [2021-12-21 10:26:14,845 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2021-12-21 10:26:14,845 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 10:26:14,846 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 10:26:14,846 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 10:26:14,846 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 10:26:14,854 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:26:14" (1/1) ... [2021-12-21 10:26:14,854 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:26:14" (1/1) ... [2021-12-21 10:26:14,864 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:26:14" (1/1) ... [2021-12-21 10:26:14,864 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:26:14" (1/1) ... [2021-12-21 10:26:14,908 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:26:14" (1/1) ... [2021-12-21 10:26:14,925 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:26:14" (1/1) ... [2021-12-21 10:26:14,934 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:26:14" (1/1) ... [2021-12-21 10:26:14,944 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 10:26:14,945 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 10:26:14,946 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 10:26:14,946 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 10:26:14,947 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:26:14" (1/1) ... [2021-12-21 10:26:14,954 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 10:26:14,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:26:14,984 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) [2021-12-21 10:26:14,985 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 [2021-12-21 10:26:15,011 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 10:26:15,011 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 10:26:15,011 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 10:26:15,012 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 10:26:15,105 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 10:26:15,107 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 10:26:16,645 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 10:26:16,658 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 10:26:16,659 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-21 10:26:16,661 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:26:16 BoogieIcfgContainer [2021-12-21 10:26:16,661 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 10:26:16,662 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 10:26:16,663 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 10:26:16,665 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 10:26:16,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 10:26:13" (1/3) ... [2021-12-21 10:26:16,666 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@728dc2b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:26:16, skipping insertion in model container [2021-12-21 10:26:16,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:26:14" (2/3) ... [2021-12-21 10:26:16,667 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@728dc2b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:26:16, skipping insertion in model container [2021-12-21 10:26:16,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:26:16" (3/3) ... [2021-12-21 10:26:16,668 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label12.c [2021-12-21 10:26:16,673 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 10:26:16,673 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 10:26:16,712 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 10:26:16,718 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 10:26:16,718 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 10:26:16,742 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 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) [2021-12-21 10:26:16,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-21 10:26:16,764 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:26:16,765 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:26:16,765 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:26:16,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:26:16,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1237142429, now seen corresponding path program 1 times [2021-12-21 10:26:16,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:26:16,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894187376] [2021-12-21 10:26:16,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:26:16,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:26:17,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:26:17,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:26:17,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:26:17,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894187376] [2021-12-21 10:26:17,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894187376] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:26:17,273 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:26:17,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 10:26:17,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676046304] [2021-12-21 10:26:17,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:26:17,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:26:17,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:26:17,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:26:17,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:26:17,311 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 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 54.333333333333336) internal successors, (163), 2 states have internal predecessors, (163), 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) [2021-12-21 10:26:18,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:26:18,395 INFO L93 Difference]: Finished difference Result 835 states and 1478 transitions. [2021-12-21 10:26:18,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:26:18,398 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 2 states have internal predecessors, (163), 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 163 [2021-12-21 10:26:18,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:26:18,411 INFO L225 Difference]: With dead ends: 835 [2021-12-21 10:26:18,411 INFO L226 Difference]: Without dead ends: 456 [2021-12-21 10:26:18,416 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:26:18,419 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 125 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-21 10:26:18,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 161 Invalid, 852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-21 10:26:18,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-12-21 10:26:18,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 451. [2021-12-21 10:26:18,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 450 states have (on average 1.5622222222222222) internal successors, (703), 450 states have internal predecessors, (703), 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) [2021-12-21 10:26:18,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 703 transitions. [2021-12-21 10:26:18,496 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 703 transitions. Word has length 163 [2021-12-21 10:26:18,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:26:18,497 INFO L470 AbstractCegarLoop]: Abstraction has 451 states and 703 transitions. [2021-12-21 10:26:18,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 2 states have internal predecessors, (163), 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) [2021-12-21 10:26:18,498 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 703 transitions. [2021-12-21 10:26:18,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-12-21 10:26:18,502 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:26:18,502 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-21 10:26:18,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 10:26:18,503 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:26:18,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:26:18,504 INFO L85 PathProgramCache]: Analyzing trace with hash -23109611, now seen corresponding path program 1 times [2021-12-21 10:26:18,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:26:18,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710396958] [2021-12-21 10:26:18,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:26:18,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:26:18,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:26:18,616 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:26:18,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:26:18,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710396958] [2021-12-21 10:26:18,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710396958] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:26:18,617 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:26:18,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 10:26:18,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385042795] [2021-12-21 10:26:18,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:26:18,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:26:18,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:26:18,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:26:18,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:26:18,620 INFO L87 Difference]: Start difference. First operand 451 states and 703 transitions. Second operand has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 2 states have internal predecessors, (169), 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) [2021-12-21 10:26:19,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:26:19,369 INFO L93 Difference]: Finished difference Result 1340 states and 2094 transitions. [2021-12-21 10:26:19,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:26:19,370 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 2 states have internal predecessors, (169), 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 169 [2021-12-21 10:26:19,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:26:19,374 INFO L225 Difference]: With dead ends: 1340 [2021-12-21 10:26:19,374 INFO L226 Difference]: Without dead ends: 891 [2021-12-21 10:26:19,376 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:26:19,377 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 285 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 10:26:19,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 154 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 10:26:19,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2021-12-21 10:26:19,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 887. [2021-12-21 10:26:19,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 886 states have (on average 1.5474040632054176) internal successors, (1371), 886 states have internal predecessors, (1371), 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) [2021-12-21 10:26:19,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 1371 transitions. [2021-12-21 10:26:19,427 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 1371 transitions. Word has length 169 [2021-12-21 10:26:19,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:26:19,428 INFO L470 AbstractCegarLoop]: Abstraction has 887 states and 1371 transitions. [2021-12-21 10:26:19,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 2 states have internal predecessors, (169), 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) [2021-12-21 10:26:19,429 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 1371 transitions. [2021-12-21 10:26:19,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-12-21 10:26:19,438 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:26:19,438 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:26:19,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 10:26:19,441 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:26:19,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:26:19,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1333876663, now seen corresponding path program 1 times [2021-12-21 10:26:19,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:26:19,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178004685] [2021-12-21 10:26:19,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:26:19,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:26:19,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:26:19,582 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:26:19,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:26:19,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178004685] [2021-12-21 10:26:19,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178004685] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:26:19,583 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:26:19,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 10:26:19,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534451781] [2021-12-21 10:26:19,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:26:19,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:26:19,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:26:19,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:26:19,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:26:19,586 INFO L87 Difference]: Start difference. First operand 887 states and 1371 transitions. Second operand has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 2 states have internal predecessors, (173), 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) [2021-12-21 10:26:20,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:26:20,339 INFO L93 Difference]: Finished difference Result 2612 states and 4042 transitions. [2021-12-21 10:26:20,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:26:20,340 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 2 states have internal predecessors, (173), 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 173 [2021-12-21 10:26:20,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:26:20,347 INFO L225 Difference]: With dead ends: 2612 [2021-12-21 10:26:20,347 INFO L226 Difference]: Without dead ends: 1727 [2021-12-21 10:26:20,349 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:26:20,354 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 236 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 10:26:20,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 112 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 10:26:20,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1727 states. [2021-12-21 10:26:20,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1727 to 1725. [2021-12-21 10:26:20,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1725 states, 1724 states have (on average 1.472737819025522) internal successors, (2539), 1724 states have internal predecessors, (2539), 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) [2021-12-21 10:26:20,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1725 states to 1725 states and 2539 transitions. [2021-12-21 10:26:20,391 INFO L78 Accepts]: Start accepts. Automaton has 1725 states and 2539 transitions. Word has length 173 [2021-12-21 10:26:20,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:26:20,392 INFO L470 AbstractCegarLoop]: Abstraction has 1725 states and 2539 transitions. [2021-12-21 10:26:20,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 2 states have internal predecessors, (173), 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) [2021-12-21 10:26:20,392 INFO L276 IsEmpty]: Start isEmpty. Operand 1725 states and 2539 transitions. [2021-12-21 10:26:20,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-12-21 10:26:20,396 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:26:20,396 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-12-21 10:26:20,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 10:26:20,396 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:26:20,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:26:20,397 INFO L85 PathProgramCache]: Analyzing trace with hash -649474255, now seen corresponding path program 1 times [2021-12-21 10:26:20,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:26:20,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808347158] [2021-12-21 10:26:20,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:26:20,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:26:20,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:26:20,461 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 10:26:20,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:26:20,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808347158] [2021-12-21 10:26:20,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808347158] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:26:20,462 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:26:20,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 10:26:20,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246463835] [2021-12-21 10:26:20,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:26:20,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:26:20,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:26:20,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:26:20,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:26:20,464 INFO L87 Difference]: Start difference. First operand 1725 states and 2539 transitions. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 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) [2021-12-21 10:26:21,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:26:21,190 INFO L93 Difference]: Finished difference Result 5073 states and 7473 transitions. [2021-12-21 10:26:21,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:26:21,191 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 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 175 [2021-12-21 10:26:21,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:26:21,203 INFO L225 Difference]: With dead ends: 5073 [2021-12-21 10:26:21,203 INFO L226 Difference]: Without dead ends: 3350 [2021-12-21 10:26:21,206 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:26:21,207 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 214 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 10:26:21,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 194 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 10:26:21,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3350 states. [2021-12-21 10:26:21,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3350 to 3350. [2021-12-21 10:26:21,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3350 states, 3349 states have (on average 1.3114362496267542) internal successors, (4392), 3349 states have internal predecessors, (4392), 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) [2021-12-21 10:26:21,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3350 states to 3350 states and 4392 transitions. [2021-12-21 10:26:21,273 INFO L78 Accepts]: Start accepts. Automaton has 3350 states and 4392 transitions. Word has length 175 [2021-12-21 10:26:21,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:26:21,273 INFO L470 AbstractCegarLoop]: Abstraction has 3350 states and 4392 transitions. [2021-12-21 10:26:21,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 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) [2021-12-21 10:26:21,274 INFO L276 IsEmpty]: Start isEmpty. Operand 3350 states and 4392 transitions. [2021-12-21 10:26:21,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-12-21 10:26:21,279 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:26:21,279 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 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] [2021-12-21 10:26:21,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 10:26:21,280 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:26:21,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:26:21,281 INFO L85 PathProgramCache]: Analyzing trace with hash -281310709, now seen corresponding path program 1 times [2021-12-21 10:26:21,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:26:21,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160192175] [2021-12-21 10:26:21,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:26:21,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:26:21,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:26:21,356 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-21 10:26:21,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:26:21,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160192175] [2021-12-21 10:26:21,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160192175] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:26:21,358 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:26:21,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:26:21,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187363953] [2021-12-21 10:26:21,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:26:21,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:26:21,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:26:21,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:26:21,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:26:21,362 INFO L87 Difference]: Start difference. First operand 3350 states and 4392 transitions. Second operand has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 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) [2021-12-21 10:26:22,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:26:22,152 INFO L93 Difference]: Finished difference Result 9360 states and 12381 transitions. [2021-12-21 10:26:22,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:26:22,153 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 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 184 [2021-12-21 10:26:22,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:26:22,175 INFO L225 Difference]: With dead ends: 9360 [2021-12-21 10:26:22,176 INFO L226 Difference]: Without dead ends: 6012 [2021-12-21 10:26:22,183 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:26:22,186 INFO L933 BasicCegarLoop]: 368 mSDtfsCounter, 216 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 10:26:22,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 391 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 10:26:22,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6012 states. [2021-12-21 10:26:22,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6012 to 6006. [2021-12-21 10:26:22,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6006 states, 6005 states have (on average 1.2502914238134888) internal successors, (7508), 6005 states have internal predecessors, (7508), 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) [2021-12-21 10:26:22,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6006 states to 6006 states and 7508 transitions. [2021-12-21 10:26:22,294 INFO L78 Accepts]: Start accepts. Automaton has 6006 states and 7508 transitions. Word has length 184 [2021-12-21 10:26:22,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:26:22,295 INFO L470 AbstractCegarLoop]: Abstraction has 6006 states and 7508 transitions. [2021-12-21 10:26:22,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 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) [2021-12-21 10:26:22,298 INFO L276 IsEmpty]: Start isEmpty. Operand 6006 states and 7508 transitions. [2021-12-21 10:26:22,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-12-21 10:26:22,307 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:26:22,307 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:26:22,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 10:26:22,308 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:26:22,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:26:22,309 INFO L85 PathProgramCache]: Analyzing trace with hash -319235317, now seen corresponding path program 1 times [2021-12-21 10:26:22,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:26:22,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708016116] [2021-12-21 10:26:22,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:26:22,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:26:22,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:26:22,390 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-21 10:26:22,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:26:22,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708016116] [2021-12-21 10:26:22,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708016116] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:26:22,391 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:26:22,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 10:26:22,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101941961] [2021-12-21 10:26:22,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:26:22,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:26:22,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:26:22,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:26:22,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:26:22,393 INFO L87 Difference]: Start difference. First operand 6006 states and 7508 transitions. Second operand has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 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) [2021-12-21 10:26:23,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:26:23,213 INFO L93 Difference]: Finished difference Result 17144 states and 21528 transitions. [2021-12-21 10:26:23,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:26:23,214 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 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 203 [2021-12-21 10:26:23,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:26:23,249 INFO L225 Difference]: With dead ends: 17144 [2021-12-21 10:26:23,250 INFO L226 Difference]: Without dead ends: 11140 [2021-12-21 10:26:23,259 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:26:23,259 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 219 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 10:26:23,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 176 Invalid, 757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 10:26:23,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11140 states. [2021-12-21 10:26:23,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11140 to 11125. [2021-12-21 10:26:23,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11125 states, 11124 states have (on average 1.2303128371089536) internal successors, (13686), 11124 states have internal predecessors, (13686), 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) [2021-12-21 10:26:23,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11125 states to 11125 states and 13686 transitions. [2021-12-21 10:26:23,445 INFO L78 Accepts]: Start accepts. Automaton has 11125 states and 13686 transitions. Word has length 203 [2021-12-21 10:26:23,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:26:23,445 INFO L470 AbstractCegarLoop]: Abstraction has 11125 states and 13686 transitions. [2021-12-21 10:26:23,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 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) [2021-12-21 10:26:23,446 INFO L276 IsEmpty]: Start isEmpty. Operand 11125 states and 13686 transitions. [2021-12-21 10:26:23,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2021-12-21 10:26:23,486 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:26:23,486 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:26:23,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 10:26:23,487 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:26:23,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:26:23,487 INFO L85 PathProgramCache]: Analyzing trace with hash 817393068, now seen corresponding path program 1 times [2021-12-21 10:26:23,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:26:23,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645666806] [2021-12-21 10:26:23,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:26:23,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:26:23,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:26:23,567 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 38 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-21 10:26:23,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:26:23,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645666806] [2021-12-21 10:26:23,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645666806] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:26:23,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701324589] [2021-12-21 10:26:23,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:26:23,569 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:26:23,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:26:23,571 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) [2021-12-21 10:26:23,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 10:26:23,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:26:23,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 10:26:23,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:26:24,269 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-12-21 10:26:24,270 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 10:26:24,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701324589] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:26:24,271 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 10:26:24,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-12-21 10:26:24,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515472517] [2021-12-21 10:26:24,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:26:24,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:26:24,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:26:24,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:26:24,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:26:24,275 INFO L87 Difference]: Start difference. First operand 11125 states and 13686 transitions. Second operand has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 2 states have internal predecessors, (167), 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) [2021-12-21 10:26:25,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:26:25,165 INFO L93 Difference]: Finished difference Result 31061 states and 38427 transitions. [2021-12-21 10:26:25,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:26:25,166 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 2 states have internal predecessors, (167), 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 211 [2021-12-21 10:26:25,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:26:25,219 INFO L225 Difference]: With dead ends: 31061 [2021-12-21 10:26:25,219 INFO L226 Difference]: Without dead ends: 19938 [2021-12-21 10:26:25,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:26:25,238 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 97 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 10:26:25,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 164 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 10:26:25,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19938 states. [2021-12-21 10:26:25,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19938 to 19934. [2021-12-21 10:26:25,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19934 states, 19933 states have (on average 1.213465108112176) internal successors, (24188), 19933 states have internal predecessors, (24188), 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) [2021-12-21 10:26:25,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19934 states to 19934 states and 24188 transitions. [2021-12-21 10:26:25,650 INFO L78 Accepts]: Start accepts. Automaton has 19934 states and 24188 transitions. Word has length 211 [2021-12-21 10:26:25,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:26:25,651 INFO L470 AbstractCegarLoop]: Abstraction has 19934 states and 24188 transitions. [2021-12-21 10:26:25,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 2 states have internal predecessors, (167), 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) [2021-12-21 10:26:25,652 INFO L276 IsEmpty]: Start isEmpty. Operand 19934 states and 24188 transitions. [2021-12-21 10:26:25,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-12-21 10:26:25,674 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:26:25,674 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:26:25,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 10:26:25,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:26:25,900 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:26:25,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:26:25,901 INFO L85 PathProgramCache]: Analyzing trace with hash -2037132949, now seen corresponding path program 1 times [2021-12-21 10:26:25,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:26:25,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964145770] [2021-12-21 10:26:25,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:26:25,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:26:25,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:26:26,004 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 56 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-21 10:26:26,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:26:26,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964145770] [2021-12-21 10:26:26,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964145770] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:26:26,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299137765] [2021-12-21 10:26:26,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:26:26,005 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:26:26,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:26:26,007 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) [2021-12-21 10:26:26,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 10:26:26,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:26:26,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 10:26:26,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:26:26,595 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-21 10:26:26,595 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 10:26:26,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299137765] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:26:26,595 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 10:26:26,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-21 10:26:26,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862164973] [2021-12-21 10:26:26,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:26:26,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:26:26,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:26:26,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:26:26,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:26:26,596 INFO L87 Difference]: Start difference. First operand 19934 states and 24188 transitions. Second operand has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 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) [2021-12-21 10:26:27,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:26:27,506 INFO L93 Difference]: Finished difference Result 46444 states and 56958 transitions. [2021-12-21 10:26:27,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:26:27,506 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 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 214 [2021-12-21 10:26:27,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:26:27,565 INFO L225 Difference]: With dead ends: 46444 [2021-12-21 10:26:27,566 INFO L226 Difference]: Without dead ends: 26512 [2021-12-21 10:26:27,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:26:27,594 INFO L933 BasicCegarLoop]: 362 mSDtfsCounter, 75 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 10:26:27,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 385 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 10:26:27,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26512 states. [2021-12-21 10:26:27,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26512 to 26446. [2021-12-21 10:26:28,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26446 states, 26445 states have (on average 1.2237095859330687) internal successors, (32361), 26445 states have internal predecessors, (32361), 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) [2021-12-21 10:26:28,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26446 states to 26446 states and 32361 transitions. [2021-12-21 10:26:28,081 INFO L78 Accepts]: Start accepts. Automaton has 26446 states and 32361 transitions. Word has length 214 [2021-12-21 10:26:28,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:26:28,082 INFO L470 AbstractCegarLoop]: Abstraction has 26446 states and 32361 transitions. [2021-12-21 10:26:28,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 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) [2021-12-21 10:26:28,083 INFO L276 IsEmpty]: Start isEmpty. Operand 26446 states and 32361 transitions. [2021-12-21 10:26:28,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-12-21 10:26:28,115 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:26:28,118 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:26:28,143 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-21 10:26:28,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-21 10:26:28,332 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:26:28,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:26:28,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1243125533, now seen corresponding path program 1 times [2021-12-21 10:26:28,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:26:28,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505122414] [2021-12-21 10:26:28,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:26:28,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:26:28,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:26:28,448 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 63 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-21 10:26:28,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:26:28,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505122414] [2021-12-21 10:26:28,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505122414] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:26:28,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909842643] [2021-12-21 10:26:28,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:26:28,449 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:26:28,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:26:28,452 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) [2021-12-21 10:26:28,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 10:26:28,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:26:28,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 10:26:28,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:26:28,976 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-21 10:26:28,976 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 10:26:28,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909842643] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:26:28,977 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 10:26:28,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-21 10:26:28,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723255876] [2021-12-21 10:26:28,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:26:28,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:26:28,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:26:28,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:26:28,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:26:28,978 INFO L87 Difference]: Start difference. First operand 26446 states and 32361 transitions. Second operand has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 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) [2021-12-21 10:26:29,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:26:29,963 INFO L93 Difference]: Finished difference Result 70805 states and 87019 transitions. [2021-12-21 10:26:29,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:26:29,964 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 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 220 [2021-12-21 10:26:29,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:26:30,060 INFO L225 Difference]: With dead ends: 70805 [2021-12-21 10:26:30,060 INFO L226 Difference]: Without dead ends: 44361 [2021-12-21 10:26:30,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:26:30,094 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 252 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-21 10:26:30,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 194 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 625 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-21 10:26:30,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44361 states. [2021-12-21 10:26:30,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44361 to 44353. [2021-12-21 10:26:30,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44353 states, 44352 states have (on average 1.203553391053391) internal successors, (53380), 44352 states have internal predecessors, (53380), 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) [2021-12-21 10:26:30,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44353 states to 44353 states and 53380 transitions. [2021-12-21 10:26:30,950 INFO L78 Accepts]: Start accepts. Automaton has 44353 states and 53380 transitions. Word has length 220 [2021-12-21 10:26:30,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:26:30,950 INFO L470 AbstractCegarLoop]: Abstraction has 44353 states and 53380 transitions. [2021-12-21 10:26:30,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 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) [2021-12-21 10:26:30,950 INFO L276 IsEmpty]: Start isEmpty. Operand 44353 states and 53380 transitions. [2021-12-21 10:26:30,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2021-12-21 10:26:30,995 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:26:30,995 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-21 10:26:31,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 10:26:31,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:26:31,219 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:26:31,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:26:31,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1635882939, now seen corresponding path program 1 times [2021-12-21 10:26:31,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:26:31,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069890758] [2021-12-21 10:26:31,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:26:31,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:26:31,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:26:31,362 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-21 10:26:31,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:26:31,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069890758] [2021-12-21 10:26:31,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069890758] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:26:31,362 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:26:31,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:26:31,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153883787] [2021-12-21 10:26:31,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:26:31,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:26:31,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:26:31,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:26:31,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:26:31,364 INFO L87 Difference]: Start difference. First operand 44353 states and 53380 transitions. Second operand has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 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) [2021-12-21 10:26:32,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:26:32,472 INFO L93 Difference]: Finished difference Result 101359 states and 122628 transitions. [2021-12-21 10:26:32,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:26:32,472 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 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 232 [2021-12-21 10:26:32,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:26:32,559 INFO L225 Difference]: With dead ends: 101359 [2021-12-21 10:26:32,559 INFO L226 Difference]: Without dead ends: 57414 [2021-12-21 10:26:32,597 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:26:32,598 INFO L933 BasicCegarLoop]: 369 mSDtfsCounter, 173 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-21 10:26:32,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 390 Invalid, 740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-21 10:26:32,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57414 states. [2021-12-21 10:26:33,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57414 to 57140. [2021-12-21 10:26:33,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57140 states, 57139 states have (on average 1.1763419030784579) internal successors, (67215), 57139 states have internal predecessors, (67215), 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) [2021-12-21 10:26:33,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57140 states to 57140 states and 67215 transitions. [2021-12-21 10:26:33,670 INFO L78 Accepts]: Start accepts. Automaton has 57140 states and 67215 transitions. Word has length 232 [2021-12-21 10:26:33,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:26:33,670 INFO L470 AbstractCegarLoop]: Abstraction has 57140 states and 67215 transitions. [2021-12-21 10:26:33,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 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) [2021-12-21 10:26:33,671 INFO L276 IsEmpty]: Start isEmpty. Operand 57140 states and 67215 transitions. [2021-12-21 10:26:33,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2021-12-21 10:26:33,718 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:26:33,719 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:26:33,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-21 10:26:33,719 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:26:33,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:26:33,720 INFO L85 PathProgramCache]: Analyzing trace with hash -895747558, now seen corresponding path program 1 times [2021-12-21 10:26:33,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:26:33,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318503113] [2021-12-21 10:26:33,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:26:33,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:26:33,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:26:33,930 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-21 10:26:33,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:26:33,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318503113] [2021-12-21 10:26:33,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318503113] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:26:33,931 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:26:33,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 10:26:33,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291328307] [2021-12-21 10:26:33,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:26:33,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:26:33,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:26:33,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:26:33,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:26:33,934 INFO L87 Difference]: Start difference. First operand 57140 states and 67215 transitions. Second operand has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 2 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:26:35,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:26:35,064 INFO L93 Difference]: Finished difference Result 133485 states and 158266 transitions. [2021-12-21 10:26:35,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:26:35,065 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 2 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 244 [2021-12-21 10:26:35,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:26:35,184 INFO L225 Difference]: With dead ends: 133485 [2021-12-21 10:26:35,184 INFO L226 Difference]: Without dead ends: 76956 [2021-12-21 10:26:35,224 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:26:35,225 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 171 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 10:26:35,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 237 Invalid, 783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 769 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 10:26:35,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76956 states. [2021-12-21 10:26:36,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76956 to 76881. [2021-12-21 10:26:36,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76881 states, 76880 states have (on average 1.189646201873049) internal successors, (91460), 76880 states have internal predecessors, (91460), 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) [2021-12-21 10:26:36,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76881 states to 76881 states and 91460 transitions. [2021-12-21 10:26:36,353 INFO L78 Accepts]: Start accepts. Automaton has 76881 states and 91460 transitions. Word has length 244 [2021-12-21 10:26:36,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:26:36,354 INFO L470 AbstractCegarLoop]: Abstraction has 76881 states and 91460 transitions. [2021-12-21 10:26:36,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 2 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:26:36,354 INFO L276 IsEmpty]: Start isEmpty. Operand 76881 states and 91460 transitions. [2021-12-21 10:26:36,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2021-12-21 10:26:36,411 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:26:36,411 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-21 10:26:36,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-21 10:26:36,411 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:26:36,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:26:36,412 INFO L85 PathProgramCache]: Analyzing trace with hash 415824609, now seen corresponding path program 1 times [2021-12-21 10:26:36,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:26:36,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295022489] [2021-12-21 10:26:36,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:26:36,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:26:36,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:26:36,685 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 101 proven. 6 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-12-21 10:26:36,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:26:36,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295022489] [2021-12-21 10:26:36,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295022489] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:26:36,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64157277] [2021-12-21 10:26:36,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:26:36,711 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:26:36,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:26:36,720 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 10:26:36,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 10:26:36,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:26:36,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 10:26:36,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:26:37,182 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 148 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-21 10:26:37,182 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 10:26:37,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64157277] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:26:37,182 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 10:26:37,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-21 10:26:37,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047981437] [2021-12-21 10:26:37,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:26:37,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:26:37,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:26:37,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:26:37,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:26:37,184 INFO L87 Difference]: Start difference. First operand 76881 states and 91460 transitions. Second operand has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 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) [2021-12-21 10:26:38,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:26:38,039 INFO L93 Difference]: Finished difference Result 199557 states and 237436 transitions. [2021-12-21 10:26:38,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:26:38,039 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 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 248 [2021-12-21 10:26:38,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:26:38,217 INFO L225 Difference]: With dead ends: 199557 [2021-12-21 10:26:38,217 INFO L226 Difference]: Without dead ends: 123693 [2021-12-21 10:26:38,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:26:38,278 INFO L933 BasicCegarLoop]: 643 mSDtfsCounter, 303 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 913 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:26:38,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 913 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 10:26:38,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123693 states. [2021-12-21 10:26:39,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123693 to 123285. [2021-12-21 10:26:39,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123285 states, 123284 states have (on average 1.1730475974173453) internal successors, (144618), 123284 states have internal predecessors, (144618), 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) [2021-12-21 10:26:40,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123285 states to 123285 states and 144618 transitions. [2021-12-21 10:26:40,122 INFO L78 Accepts]: Start accepts. Automaton has 123285 states and 144618 transitions. Word has length 248 [2021-12-21 10:26:40,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:26:40,123 INFO L470 AbstractCegarLoop]: Abstraction has 123285 states and 144618 transitions. [2021-12-21 10:26:40,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 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) [2021-12-21 10:26:40,123 INFO L276 IsEmpty]: Start isEmpty. Operand 123285 states and 144618 transitions. [2021-12-21 10:26:40,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2021-12-21 10:26:40,190 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:26:40,190 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 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, 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] [2021-12-21 10:26:40,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-21 10:26:40,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:26:40,391 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:26:40,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:26:40,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1977088340, now seen corresponding path program 1 times [2021-12-21 10:26:40,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:26:40,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926479403] [2021-12-21 10:26:40,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:26:40,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:26:40,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:26:40,472 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 93 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-21 10:26:40,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:26:40,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926479403] [2021-12-21 10:26:40,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926479403] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:26:40,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325288335] [2021-12-21 10:26:40,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:26:40,473 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:26:40,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:26:40,474 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 10:26:40,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-21 10:26:40,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:26:40,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 10:26:40,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:26:41,198 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-12-21 10:26:41,198 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 10:26:41,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325288335] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:26:41,199 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 10:26:41,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-12-21 10:26:41,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103734735] [2021-12-21 10:26:41,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:26:41,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:26:41,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:26:41,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:26:41,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:26:41,200 INFO L87 Difference]: Start difference. First operand 123285 states and 144618 transitions. Second operand has 3 states, 3 states have (on average 66.0) internal successors, (198), 2 states have internal predecessors, (198), 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) [2021-12-21 10:26:42,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:26:42,189 INFO L93 Difference]: Finished difference Result 238726 states and 280218 transitions. [2021-12-21 10:26:42,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:26:42,189 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 2 states have internal predecessors, (198), 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 248 [2021-12-21 10:26:42,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:26:42,354 INFO L225 Difference]: With dead ends: 238726 [2021-12-21 10:26:42,354 INFO L226 Difference]: Without dead ends: 116458 [2021-12-21 10:26:42,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:26:42,436 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 308 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 10:26:42,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [308 Valid, 31 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 10:26:42,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116458 states. [2021-12-21 10:26:43,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116458 to 116458. [2021-12-21 10:26:44,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116458 states, 116457 states have (on average 1.1661471616132992) internal successors, (135806), 116457 states have internal predecessors, (135806), 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) [2021-12-21 10:26:44,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116458 states to 116458 states and 135806 transitions. [2021-12-21 10:26:44,201 INFO L78 Accepts]: Start accepts. Automaton has 116458 states and 135806 transitions. Word has length 248 [2021-12-21 10:26:44,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:26:44,201 INFO L470 AbstractCegarLoop]: Abstraction has 116458 states and 135806 transitions. [2021-12-21 10:26:44,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 2 states have internal predecessors, (198), 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) [2021-12-21 10:26:44,201 INFO L276 IsEmpty]: Start isEmpty. Operand 116458 states and 135806 transitions. [2021-12-21 10:26:44,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2021-12-21 10:26:44,249 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:26:44,249 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:26:44,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-21 10:26:44,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-21 10:26:44,451 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:26:44,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:26:44,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1034228266, now seen corresponding path program 1 times [2021-12-21 10:26:44,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:26:44,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062748636] [2021-12-21 10:26:44,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:26:44,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:26:44,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:26:44,925 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 114 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:26:44,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:26:44,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062748636] [2021-12-21 10:26:44,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062748636] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:26:44,926 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:26:44,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:26:44,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512520667] [2021-12-21 10:26:44,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:26:44,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:26:44,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:26:44,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:26:44,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:26:44,928 INFO L87 Difference]: Start difference. First operand 116458 states and 135806 transitions. Second operand has 4 states, 4 states have (on average 62.0) internal successors, (248), 3 states have internal predecessors, (248), 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) [2021-12-21 10:26:46,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:26:46,360 INFO L93 Difference]: Finished difference Result 231139 states and 269645 transitions. [2021-12-21 10:26:46,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:26:46,361 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 62.0) internal successors, (248), 3 states have internal predecessors, (248), 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 248 [2021-12-21 10:26:46,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:26:46,876 INFO L225 Difference]: With dead ends: 231139 [2021-12-21 10:26:46,876 INFO L226 Difference]: Without dead ends: 115698 [2021-12-21 10:26:46,943 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:26:46,944 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 388 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 1007 mSolverCounterSat, 304 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 1311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 304 IncrementalHoareTripleChecker+Valid, 1007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-21 10:26:46,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [388 Valid, 106 Invalid, 1311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [304 Valid, 1007 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-21 10:26:47,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115698 states. [2021-12-21 10:26:48,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115698 to 112350. [2021-12-21 10:26:48,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112350 states, 112349 states have (on average 1.15851498455705) internal successors, (130158), 112349 states have internal predecessors, (130158), 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) [2021-12-21 10:26:48,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112350 states to 112350 states and 130158 transitions. [2021-12-21 10:26:48,434 INFO L78 Accepts]: Start accepts. Automaton has 112350 states and 130158 transitions. Word has length 248 [2021-12-21 10:26:48,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:26:48,435 INFO L470 AbstractCegarLoop]: Abstraction has 112350 states and 130158 transitions. [2021-12-21 10:26:48,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 62.0) internal successors, (248), 3 states have internal predecessors, (248), 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) [2021-12-21 10:26:48,435 INFO L276 IsEmpty]: Start isEmpty. Operand 112350 states and 130158 transitions. [2021-12-21 10:26:48,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2021-12-21 10:26:48,480 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:26:48,481 INFO L514 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:26:48,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-21 10:26:48,481 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:26:48,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:26:48,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1955164033, now seen corresponding path program 1 times [2021-12-21 10:26:48,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:26:48,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143285456] [2021-12-21 10:26:48,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:26:48,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:26:48,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:26:48,567 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 74 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-21 10:26:48,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:26:48,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143285456] [2021-12-21 10:26:48,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143285456] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:26:48,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874297205] [2021-12-21 10:26:48,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:26:48,568 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:26:48,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:26:48,572 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 10:26:48,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-21 10:26:48,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:26:48,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 10:26:48,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:26:49,117 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-21 10:26:49,117 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 10:26:49,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874297205] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:26:49,117 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 10:26:49,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-21 10:26:49,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161681944] [2021-12-21 10:26:49,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:26:49,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:26:49,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:26:49,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:26:49,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-21 10:26:49,118 INFO L87 Difference]: Start difference. First operand 112350 states and 130158 transitions. Second operand has 4 states, 4 states have (on average 50.5) internal successors, (202), 3 states have internal predecessors, (202), 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) [2021-12-21 10:26:50,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:26:50,856 INFO L93 Difference]: Finished difference Result 303695 states and 351773 transitions. [2021-12-21 10:26:50,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:26:50,857 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 50.5) internal successors, (202), 3 states have internal predecessors, (202), 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 255 [2021-12-21 10:26:50,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:26:51,109 INFO L225 Difference]: With dead ends: 303695 [2021-12-21 10:26:51,109 INFO L226 Difference]: Without dead ends: 192362 [2021-12-21 10:26:51,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-21 10:26:51,200 INFO L933 BasicCegarLoop]: 247 mSDtfsCounter, 519 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 849 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 519 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 10:26:51,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [519 Valid, 485 Invalid, 965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 849 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 10:26:51,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192362 states. [2021-12-21 10:26:53,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192362 to 166686. [2021-12-21 10:26:53,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166686 states, 166685 states have (on average 1.159018507964124) internal successors, (193191), 166685 states have internal predecessors, (193191), 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) [2021-12-21 10:26:54,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166686 states to 166686 states and 193191 transitions. [2021-12-21 10:26:54,167 INFO L78 Accepts]: Start accepts. Automaton has 166686 states and 193191 transitions. Word has length 255 [2021-12-21 10:26:54,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:26:54,168 INFO L470 AbstractCegarLoop]: Abstraction has 166686 states and 193191 transitions. [2021-12-21 10:26:54,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 50.5) internal successors, (202), 3 states have internal predecessors, (202), 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) [2021-12-21 10:26:54,168 INFO L276 IsEmpty]: Start isEmpty. Operand 166686 states and 193191 transitions. [2021-12-21 10:26:54,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2021-12-21 10:26:54,242 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:26:54,243 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-12-21 10:26:54,284 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-21 10:26:54,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-21 10:26:54,476 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:26:54,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:26:54,476 INFO L85 PathProgramCache]: Analyzing trace with hash -216744641, now seen corresponding path program 1 times [2021-12-21 10:26:54,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:26:54,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378593043] [2021-12-21 10:26:54,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:26:54,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:26:54,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:26:54,561 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-21 10:26:54,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:26:54,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378593043] [2021-12-21 10:26:54,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378593043] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:26:54,562 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:26:54,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 10:26:54,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798836656] [2021-12-21 10:26:54,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:26:54,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:26:54,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:26:54,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:26:54,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:26:54,564 INFO L87 Difference]: Start difference. First operand 166686 states and 193191 transitions. Second operand has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 2 states have internal predecessors, (200), 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) [2021-12-21 10:26:56,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:26:56,611 INFO L93 Difference]: Finished difference Result 370852 states and 430935 transitions. [2021-12-21 10:26:56,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:26:56,612 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 2 states have internal predecessors, (200), 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 274 [2021-12-21 10:26:56,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:26:56,967 INFO L225 Difference]: With dead ends: 370852 [2021-12-21 10:26:56,968 INFO L226 Difference]: Without dead ends: 204980 [2021-12-21 10:26:57,004 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:26:57,005 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 226 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 10:26:57,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 162 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 698 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 10:26:57,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204980 states. [2021-12-21 10:26:59,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204980 to 204969. [2021-12-21 10:26:59,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204969 states, 204968 states have (on average 1.1619618672182974) internal successors, (238165), 204968 states have internal predecessors, (238165), 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) [2021-12-21 10:26:59,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204969 states to 204969 states and 238165 transitions. [2021-12-21 10:26:59,939 INFO L78 Accepts]: Start accepts. Automaton has 204969 states and 238165 transitions. Word has length 274 [2021-12-21 10:26:59,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:26:59,939 INFO L470 AbstractCegarLoop]: Abstraction has 204969 states and 238165 transitions. [2021-12-21 10:26:59,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 2 states have internal predecessors, (200), 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) [2021-12-21 10:26:59,939 INFO L276 IsEmpty]: Start isEmpty. Operand 204969 states and 238165 transitions. [2021-12-21 10:26:59,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2021-12-21 10:26:59,992 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:26:59,993 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:26:59,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-21 10:26:59,993 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:26:59,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:26:59,994 INFO L85 PathProgramCache]: Analyzing trace with hash -139191225, now seen corresponding path program 1 times [2021-12-21 10:26:59,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:26:59,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491943115] [2021-12-21 10:26:59,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:26:59,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:27:00,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:27:00,090 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-21 10:27:00,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:27:00,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491943115] [2021-12-21 10:27:00,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491943115] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:27:00,091 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:27:00,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:27:00,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357102839] [2021-12-21 10:27:00,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:27:00,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:27:00,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:27:00,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:27:00,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:27:00,094 INFO L87 Difference]: Start difference. First operand 204969 states and 238165 transitions. Second operand has 4 states, 4 states have (on average 51.0) internal successors, (204), 3 states have internal predecessors, (204), 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) [2021-12-21 10:27:02,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:27:02,480 INFO L93 Difference]: Finished difference Result 420760 states and 490823 transitions. [2021-12-21 10:27:02,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:27:02,481 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 51.0) internal successors, (204), 3 states have internal predecessors, (204), 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 280 [2021-12-21 10:27:02,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:27:02,805 INFO L225 Difference]: With dead ends: 420760 [2021-12-21 10:27:02,805 INFO L226 Difference]: Without dead ends: 217015 [2021-12-21 10:27:02,922 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:27:02,922 INFO L933 BasicCegarLoop]: 222 mSDtfsCounter, 471 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-21 10:27:02,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [471 Valid, 466 Invalid, 959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 769 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-21 10:27:03,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217015 states. [2021-12-21 10:27:06,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217015 to 215781. [2021-12-21 10:27:06,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215781 states, 215780 states have (on average 1.1622995643711187) internal successors, (250801), 215780 states have internal predecessors, (250801), 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) [2021-12-21 10:27:06,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215781 states to 215781 states and 250801 transitions. [2021-12-21 10:27:06,527 INFO L78 Accepts]: Start accepts. Automaton has 215781 states and 250801 transitions. Word has length 280 [2021-12-21 10:27:06,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:27:06,528 INFO L470 AbstractCegarLoop]: Abstraction has 215781 states and 250801 transitions. [2021-12-21 10:27:06,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 51.0) internal successors, (204), 3 states have internal predecessors, (204), 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) [2021-12-21 10:27:06,528 INFO L276 IsEmpty]: Start isEmpty. Operand 215781 states and 250801 transitions. [2021-12-21 10:27:06,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2021-12-21 10:27:06,575 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:27:06,575 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:27:06,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-21 10:27:06,575 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:27:06,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:27:06,576 INFO L85 PathProgramCache]: Analyzing trace with hash -128368167, now seen corresponding path program 1 times [2021-12-21 10:27:06,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:27:06,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773842856] [2021-12-21 10:27:06,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:27:06,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:27:06,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:27:06,679 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-21 10:27:06,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:27:06,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773842856] [2021-12-21 10:27:06,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773842856] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:27:06,680 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:27:06,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:27:06,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353946652] [2021-12-21 10:27:06,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:27:06,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:27:06,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:27:06,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:27:06,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:27:06,682 INFO L87 Difference]: Start difference. First operand 215781 states and 250801 transitions. Second operand has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 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)