./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem17_label56.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem17_label56.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 6817325bf2ee6430e3e6b828534a0d98b8fcced6b8f752a4847958e1d99aaba4 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 12:44:39,522 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 12:44:39,524 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 12:44:39,563 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 12:44:39,564 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 12:44:39,565 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 12:44:39,567 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 12:44:39,571 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 12:44:39,573 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 12:44:39,574 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 12:44:39,575 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 12:44:39,577 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 12:44:39,577 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 12:44:39,581 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 12:44:39,582 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 12:44:39,584 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 12:44:39,585 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 12:44:39,587 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 12:44:39,588 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 12:44:39,595 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 12:44:39,597 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 12:44:39,598 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 12:44:39,599 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 12:44:39,599 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 12:44:39,601 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 12:44:39,607 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 12:44:39,607 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 12:44:39,608 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 12:44:39,609 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 12:44:39,609 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 12:44:39,610 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 12:44:39,610 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 12:44:39,612 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 12:44:39,612 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 12:44:39,613 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 12:44:39,614 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 12:44:39,614 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 12:44:39,614 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 12:44:39,615 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 12:44:39,616 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 12:44:39,616 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 12:44:39,618 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 12:44:39,619 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 12:44:39,643 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 12:44:39,644 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 12:44:39,644 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 12:44:39,644 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 12:44:39,645 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 12:44:39,645 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 12:44:39,646 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 12:44:39,646 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 12:44:39,646 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 12:44:39,647 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 12:44:39,647 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 12:44:39,647 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 12:44:39,648 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 12:44:39,648 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 12:44:39,648 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 12:44:39,648 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 12:44:39,648 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 12:44:39,648 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 12:44:39,649 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 12:44:39,649 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 12:44:39,649 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 12:44:39,649 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 12:44:39,649 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 12:44:39,650 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 12:44:39,650 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 12:44:39,650 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 12:44:39,650 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 12:44:39,650 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 12:44:39,651 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 12:44:39,651 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 12:44:39,651 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 12:44:39,651 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 12:44:39,652 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 12:44:39,652 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6817325bf2ee6430e3e6b828534a0d98b8fcced6b8f752a4847958e1d99aaba4 [2022-07-19 12:44:39,867 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 12:44:39,882 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 12:44:39,884 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 12:44:39,885 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 12:44:39,885 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 12:44:39,886 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem17_label56.c [2022-07-19 12:44:39,939 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb19cb13f/05c6af37e2e14ed09515725b057e3fba/FLAGe105a55c7 [2022-07-19 12:44:40,516 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 12:44:40,517 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label56.c [2022-07-19 12:44:40,533 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb19cb13f/05c6af37e2e14ed09515725b057e3fba/FLAGe105a55c7 [2022-07-19 12:44:40,750 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb19cb13f/05c6af37e2e14ed09515725b057e3fba [2022-07-19 12:44:40,752 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 12:44:40,754 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 12:44:40,757 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 12:44:40,757 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 12:44:40,760 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 12:44:40,760 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 12:44:40" (1/1) ... [2022-07-19 12:44:40,761 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34f236d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:44:40, skipping insertion in model container [2022-07-19 12:44:40,762 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 12:44:40" (1/1) ... [2022-07-19 12:44:40,769 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 12:44:40,844 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 12:44:41,056 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/Problem17_label56.c[9824,9837] [2022-07-19 12:44:41,509 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 12:44:41,515 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 12:44:41,549 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/Problem17_label56.c[9824,9837] [2022-07-19 12:44:41,771 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 12:44:41,786 INFO L208 MainTranslator]: Completed translation [2022-07-19 12:44:41,787 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:44:41 WrapperNode [2022-07-19 12:44:41,787 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 12:44:41,788 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 12:44:41,789 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 12:44:41,789 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 12:44:41,794 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:44:41" (1/1) ... [2022-07-19 12:44:41,841 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:44:41" (1/1) ... [2022-07-19 12:44:42,118 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2611 [2022-07-19 12:44:42,118 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 12:44:42,119 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 12:44:42,119 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 12:44:42,120 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 12:44:42,130 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:44:41" (1/1) ... [2022-07-19 12:44:42,130 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:44:41" (1/1) ... [2022-07-19 12:44:42,179 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:44:41" (1/1) ... [2022-07-19 12:44:42,180 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:44:41" (1/1) ... [2022-07-19 12:44:42,308 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:44:41" (1/1) ... [2022-07-19 12:44:42,331 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:44:41" (1/1) ... [2022-07-19 12:44:42,376 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:44:41" (1/1) ... [2022-07-19 12:44:42,433 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 12:44:42,435 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 12:44:42,436 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 12:44:42,436 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 12:44:42,437 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:44:41" (1/1) ... [2022-07-19 12:44:42,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 12:44:42,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 12:44:42,464 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-19 12:44:42,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-19 12:44:42,508 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 12:44:42,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 12:44:42,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 12:44:42,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 12:44:42,569 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 12:44:42,571 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 12:44:45,434 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 12:44:45,447 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 12:44:45,450 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-19 12:44:45,453 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 12:44:45 BoogieIcfgContainer [2022-07-19 12:44:45,453 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 12:44:45,455 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 12:44:45,455 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 12:44:45,458 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 12:44:45,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 12:44:40" (1/3) ... [2022-07-19 12:44:45,458 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@456e0c88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 12:44:45, skipping insertion in model container [2022-07-19 12:44:45,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:44:41" (2/3) ... [2022-07-19 12:44:45,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@456e0c88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 12:44:45, skipping insertion in model container [2022-07-19 12:44:45,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 12:44:45" (3/3) ... [2022-07-19 12:44:45,461 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label56.c [2022-07-19 12:44:45,473 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 12:44:45,473 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 12:44:45,546 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 12:44:45,551 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@68c2d320, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@a4c01ed [2022-07-19 12:44:45,552 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 12:44:45,558 INFO L276 IsEmpty]: Start isEmpty. Operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:44:45,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-19 12:44:45,565 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:44:45,566 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:44:45,566 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:44:45,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:44:45,570 INFO L85 PathProgramCache]: Analyzing trace with hash -215114758, now seen corresponding path program 1 times [2022-07-19 12:44:45,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:44:45,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229384453] [2022-07-19 12:44:45,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:44:45,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:44:45,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:44:45,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 12:44:45,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:44:45,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229384453] [2022-07-19 12:44:45,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229384453] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:44:45,821 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:44:45,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 12:44:45,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790123967] [2022-07-19 12:44:45,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:44:45,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:44:45,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:44:45,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:44:45,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:44:45,851 INFO L87 Difference]: Start difference. First operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 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 22.0) internal successors, (66), 2 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:44:48,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:44:48,441 INFO L93 Difference]: Finished difference Result 1644 states and 3029 transitions. [2022-07-19 12:44:48,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:44:48,443 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 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 66 [2022-07-19 12:44:48,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:44:48,460 INFO L225 Difference]: With dead ends: 1644 [2022-07-19 12:44:48,461 INFO L226 Difference]: Without dead ends: 977 [2022-07-19 12:44:48,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:44:48,468 INFO L413 NwaCegarLoop]: 425 mSDtfsCounter, 422 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 1470 mSolverCounterSat, 332 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 1802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 332 IncrementalHoareTripleChecker+Valid, 1470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-19 12:44:48,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [422 Valid, 503 Invalid, 1802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [332 Valid, 1470 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-19 12:44:48,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2022-07-19 12:44:48,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 971. [2022-07-19 12:44:48,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 971 states, 970 states have (on average 1.5536082474226804) internal successors, (1507), 970 states have internal predecessors, (1507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:44:48,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 1507 transitions. [2022-07-19 12:44:48,556 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 1507 transitions. Word has length 66 [2022-07-19 12:44:48,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:44:48,557 INFO L495 AbstractCegarLoop]: Abstraction has 971 states and 1507 transitions. [2022-07-19 12:44:48,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:44:48,558 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 1507 transitions. [2022-07-19 12:44:48,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-07-19 12:44:48,561 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:44:48,562 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-19 12:44:48,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 12:44:48,562 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:44:48,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:44:48,563 INFO L85 PathProgramCache]: Analyzing trace with hash -181115598, now seen corresponding path program 1 times [2022-07-19 12:44:48,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:44:48,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633639681] [2022-07-19 12:44:48,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:44:48,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:44:48,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:44:48,679 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 12:44:48,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:44:48,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633639681] [2022-07-19 12:44:48,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633639681] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:44:48,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:44:48,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 12:44:48,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257885829] [2022-07-19 12:44:48,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:44:48,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:44:48,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:44:48,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:44:48,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:44:48,683 INFO L87 Difference]: Start difference. First operand 971 states and 1507 transitions. Second operand has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 2 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:44:50,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:44:50,887 INFO L93 Difference]: Finished difference Result 2815 states and 4382 transitions. [2022-07-19 12:44:50,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:44:50,887 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 2 states have internal predecessors, (133), 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 133 [2022-07-19 12:44:50,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:44:50,894 INFO L225 Difference]: With dead ends: 2815 [2022-07-19 12:44:50,894 INFO L226 Difference]: Without dead ends: 1846 [2022-07-19 12:44:50,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:44:50,897 INFO L413 NwaCegarLoop]: 507 mSDtfsCounter, 407 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1382 mSolverCounterSat, 324 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 1706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 324 IncrementalHoareTripleChecker+Valid, 1382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-19 12:44:50,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [407 Valid, 580 Invalid, 1706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [324 Valid, 1382 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-07-19 12:44:50,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1846 states. [2022-07-19 12:44:50,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1846 to 1841. [2022-07-19 12:44:50,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1841 states, 1840 states have (on average 1.3505434782608696) internal successors, (2485), 1840 states have internal predecessors, (2485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:44:50,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1841 states to 1841 states and 2485 transitions. [2022-07-19 12:44:50,940 INFO L78 Accepts]: Start accepts. Automaton has 1841 states and 2485 transitions. Word has length 133 [2022-07-19 12:44:50,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:44:50,942 INFO L495 AbstractCegarLoop]: Abstraction has 1841 states and 2485 transitions. [2022-07-19 12:44:50,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 2 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:44:50,943 INFO L276 IsEmpty]: Start isEmpty. Operand 1841 states and 2485 transitions. [2022-07-19 12:44:50,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-07-19 12:44:50,956 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:44:50,956 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-19 12:44:50,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 12:44:50,957 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:44:50,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:44:50,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1697817478, now seen corresponding path program 1 times [2022-07-19 12:44:50,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:44:50,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103228599] [2022-07-19 12:44:50,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:44:50,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:44:51,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:44:51,160 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 12:44:51,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:44:51,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103228599] [2022-07-19 12:44:51,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103228599] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:44:51,162 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:44:51,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:44:51,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979018727] [2022-07-19 12:44:51,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:44:51,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:44:51,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:44:51,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:44:51,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:44:51,165 INFO L87 Difference]: Start difference. First operand 1841 states and 2485 transitions. Second operand has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:44:53,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:44:53,327 INFO L93 Difference]: Finished difference Result 4552 states and 6285 transitions. [2022-07-19 12:44:53,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:44:53,328 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 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 136 [2022-07-19 12:44:53,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:44:53,337 INFO L225 Difference]: With dead ends: 4552 [2022-07-19 12:44:53,337 INFO L226 Difference]: Without dead ends: 2713 [2022-07-19 12:44:53,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:44:53,341 INFO L413 NwaCegarLoop]: 818 mSDtfsCounter, 441 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 1264 mSolverCounterSat, 415 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 886 SdHoareTripleChecker+Invalid, 1679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 415 IncrementalHoareTripleChecker+Valid, 1264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-19 12:44:53,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [441 Valid, 886 Invalid, 1679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [415 Valid, 1264 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-07-19 12:44:53,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2713 states. [2022-07-19 12:44:53,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2713 to 2711. [2022-07-19 12:44:53,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2711 states, 2710 states have (on average 1.3007380073800738) internal successors, (3525), 2710 states have internal predecessors, (3525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:44:53,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2711 states to 2711 states and 3525 transitions. [2022-07-19 12:44:53,391 INFO L78 Accepts]: Start accepts. Automaton has 2711 states and 3525 transitions. Word has length 136 [2022-07-19 12:44:53,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:44:53,392 INFO L495 AbstractCegarLoop]: Abstraction has 2711 states and 3525 transitions. [2022-07-19 12:44:53,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:44:53,392 INFO L276 IsEmpty]: Start isEmpty. Operand 2711 states and 3525 transitions. [2022-07-19 12:44:53,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-07-19 12:44:53,395 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:44:53,395 INFO L195 NwaCegarLoop]: 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:44:53,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 12:44:53,396 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:44:53,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:44:53,396 INFO L85 PathProgramCache]: Analyzing trace with hash 2021649633, now seen corresponding path program 1 times [2022-07-19 12:44:53,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:44:53,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466815685] [2022-07-19 12:44:53,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:44:53,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:44:53,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:44:53,592 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-07-19 12:44:53,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:44:53,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466815685] [2022-07-19 12:44:53,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466815685] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:44:53,594 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:44:53,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 12:44:53,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211536764] [2022-07-19 12:44:53,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:44:53,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:44:53,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:44:53,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:44:53,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:44:53,597 INFO L87 Difference]: Start difference. First operand 2711 states and 3525 transitions. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 2 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:44:55,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:44:55,574 INFO L93 Difference]: Finished difference Result 7984 states and 10364 transitions. [2022-07-19 12:44:55,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:44:55,574 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 2 states have internal predecessors, (138), 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 205 [2022-07-19 12:44:55,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:44:55,588 INFO L225 Difference]: With dead ends: 7984 [2022-07-19 12:44:55,588 INFO L226 Difference]: Without dead ends: 4421 [2022-07-19 12:44:55,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:44:55,592 INFO L413 NwaCegarLoop]: 516 mSDtfsCounter, 386 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-19 12:44:55,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [386 Valid, 591 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-19 12:44:55,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4421 states. [2022-07-19 12:44:55,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4421 to 3566. [2022-07-19 12:44:55,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3566 states, 3565 states have (on average 1.1778401122019635) internal successors, (4199), 3565 states have internal predecessors, (4199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:44:55,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3566 states to 3566 states and 4199 transitions. [2022-07-19 12:44:55,648 INFO L78 Accepts]: Start accepts. Automaton has 3566 states and 4199 transitions. Word has length 205 [2022-07-19 12:44:55,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:44:55,648 INFO L495 AbstractCegarLoop]: Abstraction has 3566 states and 4199 transitions. [2022-07-19 12:44:55,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 2 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:44:55,649 INFO L276 IsEmpty]: Start isEmpty. Operand 3566 states and 4199 transitions. [2022-07-19 12:44:55,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-07-19 12:44:55,651 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:44:55,651 INFO L195 NwaCegarLoop]: 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:44:55,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 12:44:55,652 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:44:55,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:44:55,653 INFO L85 PathProgramCache]: Analyzing trace with hash 546947933, now seen corresponding path program 1 times [2022-07-19 12:44:55,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:44:55,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060372444] [2022-07-19 12:44:55,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:44:55,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:44:55,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:44:55,768 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 195 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 12:44:55,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:44:55,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060372444] [2022-07-19 12:44:55,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060372444] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:44:55,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:44:55,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:44:55,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914537819] [2022-07-19 12:44:55,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:44:55,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:44:55,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:44:55,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:44:55,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:44:55,773 INFO L87 Difference]: Start difference. First operand 3566 states and 4199 transitions. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:44:57,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:44:57,239 INFO L93 Difference]: Finished difference Result 9263 states and 11078 transitions. [2022-07-19 12:44:57,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:44:57,242 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 218 [2022-07-19 12:44:57,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:44:57,259 INFO L225 Difference]: With dead ends: 9263 [2022-07-19 12:44:57,259 INFO L226 Difference]: Without dead ends: 5699 [2022-07-19 12:44:57,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:44:57,264 INFO L413 NwaCegarLoop]: 726 mSDtfsCounter, 496 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1136 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 784 SdHoareTripleChecker+Invalid, 1442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 1136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-19 12:44:57,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [496 Valid, 784 Invalid, 1442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 1136 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-19 12:44:57,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5699 states. [2022-07-19 12:44:57,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5699 to 5699. [2022-07-19 12:44:57,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5699 states, 5698 states have (on average 1.1597051597051597) internal successors, (6608), 5698 states have internal predecessors, (6608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:44:57,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5699 states to 5699 states and 6608 transitions. [2022-07-19 12:44:57,347 INFO L78 Accepts]: Start accepts. Automaton has 5699 states and 6608 transitions. Word has length 218 [2022-07-19 12:44:57,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:44:57,347 INFO L495 AbstractCegarLoop]: Abstraction has 5699 states and 6608 transitions. [2022-07-19 12:44:57,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:44:57,350 INFO L276 IsEmpty]: Start isEmpty. Operand 5699 states and 6608 transitions. [2022-07-19 12:44:57,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2022-07-19 12:44:57,354 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:44:57,354 INFO L195 NwaCegarLoop]: 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:44:57,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 12:44:57,355 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:44:57,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:44:57,356 INFO L85 PathProgramCache]: Analyzing trace with hash 754737944, now seen corresponding path program 1 times [2022-07-19 12:44:57,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:44:57,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016687012] [2022-07-19 12:44:57,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:44:57,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:44:57,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:44:57,515 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 127 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 12:44:57,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:44:57,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016687012] [2022-07-19 12:44:57,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016687012] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 12:44:57,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325492384] [2022-07-19 12:44:57,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:44:57,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:44:57,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 12:44:57,523 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 12:44:57,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 12:44:57,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:44:57,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 12:44:57,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 12:44:58,189 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 127 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 12:44:58,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 12:44:58,440 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 197 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 12:44:58,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325492384] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-19 12:44:58,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-19 12:44:58,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2022-07-19 12:44:58,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962166608] [2022-07-19 12:44:58,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:44:58,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 12:44:58,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:44:58,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 12:44:58,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-19 12:44:58,443 INFO L87 Difference]: Start difference. First operand 5699 states and 6608 transitions. Second operand has 4 states, 4 states have (on average 55.0) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:45:01,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:45:01,543 INFO L93 Difference]: Finished difference Result 16961 states and 19953 transitions. [2022-07-19 12:45:01,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 12:45:01,544 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 55.0) internal successors, (220), 3 states have internal predecessors, (220), 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 [2022-07-19 12:45:01,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:45:01,571 INFO L225 Difference]: With dead ends: 16961 [2022-07-19 12:45:01,571 INFO L226 Difference]: Without dead ends: 10384 [2022-07-19 12:45:01,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 435 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-19 12:45:01,580 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 1049 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 2183 mSolverCounterSat, 1044 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1049 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 3227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1044 IncrementalHoareTripleChecker+Valid, 2183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-07-19 12:45:01,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1049 Valid, 152 Invalid, 3227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1044 Valid, 2183 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-07-19 12:45:01,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10384 states. [2022-07-19 12:45:01,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10384 to 10379. [2022-07-19 12:45:01,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10379 states, 10378 states have (on average 1.1553285796878012) internal successors, (11990), 10378 states have internal predecessors, (11990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:45:01,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10379 states to 10379 states and 11990 transitions. [2022-07-19 12:45:01,738 INFO L78 Accepts]: Start accepts. Automaton has 10379 states and 11990 transitions. Word has length 220 [2022-07-19 12:45:01,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:45:01,738 INFO L495 AbstractCegarLoop]: Abstraction has 10379 states and 11990 transitions. [2022-07-19 12:45:01,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.0) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:45:01,739 INFO L276 IsEmpty]: Start isEmpty. Operand 10379 states and 11990 transitions. [2022-07-19 12:45:01,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2022-07-19 12:45:01,743 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:45:01,743 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:45:01,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 12:45:01,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-07-19 12:45:01,960 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:45:01,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:45:01,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1820760982, now seen corresponding path program 1 times [2022-07-19 12:45:01,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:45:01,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171358598] [2022-07-19 12:45:01,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:45:01,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:45:02,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:45:02,128 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 191 proven. 214 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 12:45:02,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:45:02,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171358598] [2022-07-19 12:45:02,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171358598] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 12:45:02,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679861263] [2022-07-19 12:45:02,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:45:02,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:45:02,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 12:45:02,136 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 12:45:02,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 12:45:02,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:45:02,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 12:45:02,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 12:45:02,663 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 268 proven. 73 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-07-19 12:45:02,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 12:45:02,901 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 341 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-07-19 12:45:02,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679861263] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-19 12:45:02,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-19 12:45:02,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 3] total 6 [2022-07-19 12:45:02,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123128104] [2022-07-19 12:45:02,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:45:02,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 12:45:02,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:45:02,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 12:45:02,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-19 12:45:02,905 INFO L87 Difference]: Start difference. First operand 10379 states and 11990 transitions. Second operand has 4 states, 4 states have (on average 57.75) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:45:05,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:45:05,699 INFO L93 Difference]: Finished difference Result 28865 states and 33388 transitions. [2022-07-19 12:45:05,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 12:45:05,700 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 57.75) internal successors, (231), 3 states have internal predecessors, (231), 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 294 [2022-07-19 12:45:05,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:45:05,735 INFO L225 Difference]: With dead ends: 28865 [2022-07-19 12:45:05,735 INFO L226 Difference]: Without dead ends: 18488 [2022-07-19 12:45:05,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 590 GetRequests, 583 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-19 12:45:05,750 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 883 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 2233 mSolverCounterSat, 594 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 883 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 2827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 594 IncrementalHoareTripleChecker+Valid, 2233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-07-19 12:45:05,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [883 Valid, 171 Invalid, 2827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [594 Valid, 2233 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-07-19 12:45:05,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18488 states. [2022-07-19 12:45:05,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18488 to 18482. [2022-07-19 12:45:05,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18482 states, 18481 states have (on average 1.1429035225366593) internal successors, (21122), 18481 states have internal predecessors, (21122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:45:06,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18482 states to 18482 states and 21122 transitions. [2022-07-19 12:45:06,021 INFO L78 Accepts]: Start accepts. Automaton has 18482 states and 21122 transitions. Word has length 294 [2022-07-19 12:45:06,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:45:06,023 INFO L495 AbstractCegarLoop]: Abstraction has 18482 states and 21122 transitions. [2022-07-19 12:45:06,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 57.75) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:45:06,024 INFO L276 IsEmpty]: Start isEmpty. Operand 18482 states and 21122 transitions. [2022-07-19 12:45:06,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2022-07-19 12:45:06,036 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:45:06,037 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2022-07-19 12:45:06,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 12:45:06,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-07-19 12:45:06,252 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:45:06,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:45:06,252 INFO L85 PathProgramCache]: Analyzing trace with hash -729878076, now seen corresponding path program 1 times [2022-07-19 12:45:06,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:45:06,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320214919] [2022-07-19 12:45:06,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:45:06,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:45:06,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:45:06,461 INFO L134 CoverageAnalysis]: Checked inductivity of 696 backedges. 550 proven. 0 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2022-07-19 12:45:06,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:45:06,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320214919] [2022-07-19 12:45:06,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320214919] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:45:06,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:45:06,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:45:06,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729457462] [2022-07-19 12:45:06,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:45:06,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:45:06,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:45:06,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:45:06,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:45:06,465 INFO L87 Difference]: Start difference. First operand 18482 states and 21122 transitions. Second operand has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:45:08,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:45:08,496 INFO L93 Difference]: Finished difference Result 50636 states and 57339 transitions. [2022-07-19 12:45:08,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:45:08,497 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 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 399 [2022-07-19 12:45:08,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:45:08,553 INFO L225 Difference]: With dead ends: 50636 [2022-07-19 12:45:08,554 INFO L226 Difference]: Without dead ends: 32156 [2022-07-19 12:45:08,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:45:08,576 INFO L413 NwaCegarLoop]: 625 mSDtfsCounter, 426 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1297 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 1498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 1297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-19 12:45:08,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [426 Valid, 669 Invalid, 1498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 1297 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-19 12:45:08,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32156 states. [2022-07-19 12:45:08,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32156 to 29570. [2022-07-19 12:45:08,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29570 states, 29569 states have (on average 1.131117048260002) internal successors, (33446), 29569 states have internal predecessors, (33446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:45:09,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29570 states to 29570 states and 33446 transitions. [2022-07-19 12:45:09,030 INFO L78 Accepts]: Start accepts. Automaton has 29570 states and 33446 transitions. Word has length 399 [2022-07-19 12:45:09,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:45:09,031 INFO L495 AbstractCegarLoop]: Abstraction has 29570 states and 33446 transitions. [2022-07-19 12:45:09,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:45:09,031 INFO L276 IsEmpty]: Start isEmpty. Operand 29570 states and 33446 transitions. [2022-07-19 12:45:09,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 401 [2022-07-19 12:45:09,039 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:45:09,040 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-19 12:45:09,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-19 12:45:09,040 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:45:09,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:45:09,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1745983289, now seen corresponding path program 1 times [2022-07-19 12:45:09,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:45:09,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001459163] [2022-07-19 12:45:09,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:45:09,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:45:09,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:45:09,211 INFO L134 CoverageAnalysis]: Checked inductivity of 712 backedges. 567 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-19 12:45:09,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:45:09,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001459163] [2022-07-19 12:45:09,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001459163] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:45:09,212 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:45:09,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:45:09,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402372629] [2022-07-19 12:45:09,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:45:09,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:45:09,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:45:09,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:45:09,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:45:09,214 INFO L87 Difference]: Start difference. First operand 29570 states and 33446 transitions. Second operand has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:45:10,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:45:10,964 INFO L93 Difference]: Finished difference Result 68521 states and 77908 transitions. [2022-07-19 12:45:10,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:45:10,965 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 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 400 [2022-07-19 12:45:10,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:45:11,137 INFO L225 Difference]: With dead ends: 68521 [2022-07-19 12:45:11,137 INFO L226 Difference]: Without dead ends: 38952 [2022-07-19 12:45:11,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:45:11,158 INFO L413 NwaCegarLoop]: 603 mSDtfsCounter, 436 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 1174 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 642 SdHoareTripleChecker+Invalid, 1443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 1174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-19 12:45:11,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [436 Valid, 642 Invalid, 1443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 1174 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-19 12:45:11,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38952 states. [2022-07-19 12:45:11,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38952 to 36818. [2022-07-19 12:45:11,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36818 states, 36817 states have (on average 1.1341228236955754) internal successors, (41755), 36817 states have internal predecessors, (41755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:45:11,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36818 states to 36818 states and 41755 transitions. [2022-07-19 12:45:11,678 INFO L78 Accepts]: Start accepts. Automaton has 36818 states and 41755 transitions. Word has length 400 [2022-07-19 12:45:11,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:45:11,679 INFO L495 AbstractCegarLoop]: Abstraction has 36818 states and 41755 transitions. [2022-07-19 12:45:11,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:45:11,680 INFO L276 IsEmpty]: Start isEmpty. Operand 36818 states and 41755 transitions. [2022-07-19 12:45:11,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 405 [2022-07-19 12:45:11,688 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:45:11,689 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:45:11,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-19 12:45:11,689 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:45:11,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:45:11,691 INFO L85 PathProgramCache]: Analyzing trace with hash -898319440, now seen corresponding path program 1 times [2022-07-19 12:45:11,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:45:11,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981163935] [2022-07-19 12:45:11,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:45:11,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:45:11,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:45:11,892 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 642 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-07-19 12:45:11,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:45:11,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981163935] [2022-07-19 12:45:11,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981163935] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:45:11,893 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:45:11,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 12:45:11,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760304125] [2022-07-19 12:45:11,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:45:11,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 12:45:11,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:45:11,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 12:45:11,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 12:45:11,895 INFO L87 Difference]: Start difference. First operand 36818 states and 41755 transitions. Second operand has 4 states, 4 states have (on average 85.25) internal successors, (341), 4 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:45:14,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:45:14,486 INFO L93 Difference]: Finished difference Result 99668 states and 112882 transitions. [2022-07-19 12:45:14,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 12:45:14,487 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 85.25) internal successors, (341), 4 states have internal predecessors, (341), 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 404 [2022-07-19 12:45:14,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:45:14,583 INFO L225 Difference]: With dead ends: 99668 [2022-07-19 12:45:14,583 INFO L226 Difference]: Without dead ends: 62852 [2022-07-19 12:45:14,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 12:45:14,622 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 818 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 2328 mSolverCounterSat, 411 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 818 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 2739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 411 IncrementalHoareTripleChecker+Valid, 2328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-19 12:45:14,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [818 Valid, 199 Invalid, 2739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [411 Valid, 2328 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-07-19 12:45:14,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62852 states. [2022-07-19 12:45:15,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62852 to 57736. [2022-07-19 12:45:15,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57736 states, 57735 states have (on average 1.1359660517883432) internal successors, (65585), 57735 states have internal predecessors, (65585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:45:15,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57736 states to 57736 states and 65585 transitions. [2022-07-19 12:45:15,557 INFO L78 Accepts]: Start accepts. Automaton has 57736 states and 65585 transitions. Word has length 404 [2022-07-19 12:45:15,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:45:15,557 INFO L495 AbstractCegarLoop]: Abstraction has 57736 states and 65585 transitions. [2022-07-19 12:45:15,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 85.25) internal successors, (341), 4 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:45:15,557 INFO L276 IsEmpty]: Start isEmpty. Operand 57736 states and 65585 transitions. [2022-07-19 12:45:15,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 406 [2022-07-19 12:45:15,564 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:45:15,565 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:45:15,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-19 12:45:15,565 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:45:15,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:45:15,566 INFO L85 PathProgramCache]: Analyzing trace with hash -2027173808, now seen corresponding path program 1 times [2022-07-19 12:45:15,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:45:15,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327525981] [2022-07-19 12:45:15,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:45:15,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:45:15,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:45:15,740 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 12:45:15,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:45:15,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327525981] [2022-07-19 12:45:15,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327525981] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:45:15,741 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:45:15,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:45:15,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237972922] [2022-07-19 12:45:15,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:45:15,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 12:45:15,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:45:15,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 12:45:15,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 12:45:15,743 INFO L87 Difference]: Start difference. First operand 57736 states and 65585 transitions. Second operand has 4 states, 4 states have (on average 101.25) internal successors, (405), 3 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:45:18,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:45:18,408 INFO L93 Difference]: Finished difference Result 120145 states and 136110 transitions. [2022-07-19 12:45:18,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 12:45:18,409 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 101.25) internal successors, (405), 3 states have internal predecessors, (405), 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 405 [2022-07-19 12:45:18,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:45:18,490 INFO L225 Difference]: With dead ends: 120145 [2022-07-19 12:45:18,490 INFO L226 Difference]: Without dead ends: 61986 [2022-07-19 12:45:18,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 12:45:18,525 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 547 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 2290 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 547 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 2519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 2290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-19 12:45:18,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [547 Valid, 249 Invalid, 2519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 2290 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-19 12:45:18,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61986 states. [2022-07-19 12:45:19,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61986 to 58161. [2022-07-19 12:45:19,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58161 states, 58160 states have (on average 1.1350068775790922) internal successors, (66012), 58160 states have internal predecessors, (66012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:45:19,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58161 states to 58161 states and 66012 transitions. [2022-07-19 12:45:19,228 INFO L78 Accepts]: Start accepts. Automaton has 58161 states and 66012 transitions. Word has length 405 [2022-07-19 12:45:19,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:45:19,229 INFO L495 AbstractCegarLoop]: Abstraction has 58161 states and 66012 transitions. [2022-07-19 12:45:19,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 101.25) internal successors, (405), 3 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:45:19,229 INFO L276 IsEmpty]: Start isEmpty. Operand 58161 states and 66012 transitions. [2022-07-19 12:45:19,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2022-07-19 12:45:19,236 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:45:19,237 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2022-07-19 12:45:19,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-19 12:45:19,237 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:45:19,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:45:19,238 INFO L85 PathProgramCache]: Analyzing trace with hash -626004042, now seen corresponding path program 1 times [2022-07-19 12:45:19,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:45:19,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797063491] [2022-07-19 12:45:19,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:45:19,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:45:19,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:45:19,579 INFO L134 CoverageAnalysis]: Checked inductivity of 696 backedges. 403 proven. 64 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2022-07-19 12:45:19,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:45:19,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797063491] [2022-07-19 12:45:19,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797063491] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 12:45:19,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976393847] [2022-07-19 12:45:19,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:45:19,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:45:19,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 12:45:19,584 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 12:45:19,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 12:45:19,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:45:19,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 12:45:19,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 12:45:41,890 INFO L134 CoverageAnalysis]: Checked inductivity of 696 backedges. 255 proven. 0 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2022-07-19 12:45:41,890 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 12:45:41,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976393847] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:45:41,891 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 12:45:41,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-07-19 12:45:41,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360894846] [2022-07-19 12:45:41,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:45:41,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:45:41,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:45:41,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:45:41,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 12:45:41,893 INFO L87 Difference]: Start difference. First operand 58161 states and 66012 transitions. Second operand has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 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) [2022-07-19 12:45:42,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:45:42,021 INFO L93 Difference]: Finished difference Result 58227 states and 66078 transitions. [2022-07-19 12:45:42,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:45:42,022 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 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 419 [2022-07-19 12:45:42,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:45:42,088 INFO L225 Difference]: With dead ends: 58227 [2022-07-19 12:45:42,088 INFO L226 Difference]: Without dead ends: 58225 [2022-07-19 12:45:42,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 419 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 12:45:42,110 INFO L413 NwaCegarLoop]: 769 mSDtfsCounter, 0 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 836 SdHoareTripleChecker+Invalid, 759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 759 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 12:45:42,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 836 Invalid, 759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 759 Unchecked, 0.0s Time] [2022-07-19 12:45:42,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58225 states. [2022-07-19 12:45:42,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58225 to 58225. [2022-07-19 12:45:42,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58225 states, 58224 states have (on average 1.1348584776037374) internal successors, (66076), 58224 states have internal predecessors, (66076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:45:42,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58225 states to 58225 states and 66076 transitions. [2022-07-19 12:45:42,762 INFO L78 Accepts]: Start accepts. Automaton has 58225 states and 66076 transitions. Word has length 419 [2022-07-19 12:45:42,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:45:42,763 INFO L495 AbstractCegarLoop]: Abstraction has 58225 states and 66076 transitions. [2022-07-19 12:45:42,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 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) [2022-07-19 12:45:42,764 INFO L276 IsEmpty]: Start isEmpty. Operand 58225 states and 66076 transitions. [2022-07-19 12:45:42,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 546 [2022-07-19 12:45:42,777 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:45:42,778 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:45:42,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 12:45:42,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:45:42,979 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:45:42,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:45:42,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1491088528, now seen corresponding path program 1 times [2022-07-19 12:45:42,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:45:42,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134273881] [2022-07-19 12:45:42,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:45:42,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:45:43,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:45:43,196 INFO L134 CoverageAnalysis]: Checked inductivity of 724 backedges. 415 proven. 0 refuted. 0 times theorem prover too weak. 309 trivial. 0 not checked. [2022-07-19 12:45:43,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:45:43,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134273881] [2022-07-19 12:45:43,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134273881] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:45:43,197 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:45:43,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:45:43,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270771014] [2022-07-19 12:45:43,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:45:43,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:45:43,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:45:43,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:45:43,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:45:43,200 INFO L87 Difference]: Start difference. First operand 58225 states and 66076 transitions. Second operand has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:45:44,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:45:44,973 INFO L93 Difference]: Finished difference Result 122404 states and 139092 transitions. [2022-07-19 12:45:44,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:45:44,973 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 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 545 [2022-07-19 12:45:44,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:45:45,045 INFO L225 Difference]: With dead ends: 122404 [2022-07-19 12:45:45,046 INFO L226 Difference]: Without dead ends: 64109 [2022-07-19 12:45:45,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:45:45,085 INFO L413 NwaCegarLoop]: 631 mSDtfsCounter, 506 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 1158 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 679 SdHoareTripleChecker+Invalid, 1347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 1158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-19 12:45:45,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [506 Valid, 679 Invalid, 1347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 1158 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-19 12:45:45,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64109 states. [2022-07-19 12:45:45,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64109 to 64103. [2022-07-19 12:45:45,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64103 states, 64102 states have (on average 1.1248166983869459) internal successors, (72103), 64102 states have internal predecessors, (72103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:45:45,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64103 states to 64103 states and 72103 transitions. [2022-07-19 12:45:45,720 INFO L78 Accepts]: Start accepts. Automaton has 64103 states and 72103 transitions. Word has length 545 [2022-07-19 12:45:45,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:45:45,721 INFO L495 AbstractCegarLoop]: Abstraction has 64103 states and 72103 transitions. [2022-07-19 12:45:45,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:45:45,721 INFO L276 IsEmpty]: Start isEmpty. Operand 64103 states and 72103 transitions. [2022-07-19 12:45:45,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 555 [2022-07-19 12:45:45,738 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:45:45,739 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-07-19 12:45:45,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-19 12:45:45,739 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:45:45,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:45:45,740 INFO L85 PathProgramCache]: Analyzing trace with hash 300500453, now seen corresponding path program 1 times [2022-07-19 12:45:45,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:45:45,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173102402] [2022-07-19 12:45:45,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:45:45,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:45:45,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:45:45,989 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 536 proven. 0 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2022-07-19 12:45:45,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:45:45,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173102402] [2022-07-19 12:45:45,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173102402] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:45:45,990 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:45:45,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 12:45:45,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913249790] [2022-07-19 12:45:45,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:45:45,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 12:45:45,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:45:45,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 12:45:45,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 12:45:45,992 INFO L87 Difference]: Start difference. First operand 64103 states and 72103 transitions. Second operand has 4 states, 4 states have (on average 100.0) internal successors, (400), 4 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:45:49,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:45:49,140 INFO L93 Difference]: Finished difference Result 149953 states and 167869 transitions. [2022-07-19 12:45:49,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 12:45:49,141 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 100.0) internal successors, (400), 4 states have internal predecessors, (400), 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 554 [2022-07-19 12:45:49,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:45:49,232 INFO L225 Difference]: With dead ends: 149953 [2022-07-19 12:45:49,232 INFO L226 Difference]: Without dead ends: 85427 [2022-07-19 12:45:49,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 12:45:49,266 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 727 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 2409 mSolverCounterSat, 369 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 727 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 2778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 369 IncrementalHoareTripleChecker+Valid, 2409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-19 12:45:49,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [727 Valid, 243 Invalid, 2778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [369 Valid, 2409 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-19 12:45:49,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85427 states. [2022-07-19 12:45:50,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85427 to 81593. [2022-07-19 12:45:50,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81593 states, 81592 states have (on average 1.1170825571134424) internal successors, (91145), 81592 states have internal predecessors, (91145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:45:50,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81593 states to 81593 states and 91145 transitions. [2022-07-19 12:45:50,444 INFO L78 Accepts]: Start accepts. Automaton has 81593 states and 91145 transitions. Word has length 554 [2022-07-19 12:45:50,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:45:50,444 INFO L495 AbstractCegarLoop]: Abstraction has 81593 states and 91145 transitions. [2022-07-19 12:45:50,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 100.0) internal successors, (400), 4 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:45:50,445 INFO L276 IsEmpty]: Start isEmpty. Operand 81593 states and 91145 transitions. [2022-07-19 12:45:50,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 559 [2022-07-19 12:45:50,460 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:45:50,461 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:45:50,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-19 12:45:50,461 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:45:50,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:45:50,463 INFO L85 PathProgramCache]: Analyzing trace with hash 720712429, now seen corresponding path program 1 times [2022-07-19 12:45:50,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:45:50,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418366809] [2022-07-19 12:45:50,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:45:50,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:45:50,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:45:50,654 INFO L134 CoverageAnalysis]: Checked inductivity of 802 backedges. 656 proven. 0 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2022-07-19 12:45:50,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:45:50,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418366809] [2022-07-19 12:45:50,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418366809] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:45:50,655 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:45:50,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:45:50,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985009619] [2022-07-19 12:45:50,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:45:50,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:45:50,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:45:50,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:45:50,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:45:50,657 INFO L87 Difference]: Start difference. First operand 81593 states and 91145 transitions. Second operand has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:45:52,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:45:52,655 INFO L93 Difference]: Finished difference Result 189556 states and 212448 transitions. [2022-07-19 12:45:52,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:45:52,655 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 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 558 [2022-07-19 12:45:52,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:45:52,777 INFO L225 Difference]: With dead ends: 189556 [2022-07-19 12:45:52,778 INFO L226 Difference]: Without dead ends: 108390 [2022-07-19 12:45:52,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:45:52,829 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 387 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1204 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 1409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 1204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-19 12:45:52,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [387 Valid, 293 Invalid, 1409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 1204 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-19 12:45:53,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108390 states. [2022-07-19 12:45:54,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108390 to 106681. [2022-07-19 12:45:54,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106681 states, 106680 states have (on average 1.1124953130858644) internal successors, (118681), 106680 states have internal predecessors, (118681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:45:54,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106681 states to 106681 states and 118681 transitions. [2022-07-19 12:45:54,525 INFO L78 Accepts]: Start accepts. Automaton has 106681 states and 118681 transitions. Word has length 558 [2022-07-19 12:45:54,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:45:54,526 INFO L495 AbstractCegarLoop]: Abstraction has 106681 states and 118681 transitions. [2022-07-19 12:45:54,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:45:54,526 INFO L276 IsEmpty]: Start isEmpty. Operand 106681 states and 118681 transitions. [2022-07-19 12:45:54,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 560 [2022-07-19 12:45:54,546 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:45:54,546 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-07-19 12:45:54,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-19 12:45:54,547 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:45:54,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:45:54,547 INFO L85 PathProgramCache]: Analyzing trace with hash -179957859, now seen corresponding path program 1 times [2022-07-19 12:45:54,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:45:54,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961765473] [2022-07-19 12:45:54,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:45:54,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:45:54,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:45:54,749 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 541 proven. 0 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2022-07-19 12:45:54,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:45:54,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961765473] [2022-07-19 12:45:54,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961765473] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:45:54,749 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:45:54,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 12:45:54,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958387971] [2022-07-19 12:45:54,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:45:54,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 12:45:54,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:45:54,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 12:45:54,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 12:45:54,752 INFO L87 Difference]: Start difference. First operand 106681 states and 118681 transitions. Second operand has 4 states, 4 states have (on average 100.0) internal successors, (400), 4 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:45:57,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:45:57,805 INFO L93 Difference]: Finished difference Result 233816 states and 259440 transitions. [2022-07-19 12:45:57,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 12:45:57,806 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 100.0) internal successors, (400), 4 states have internal predecessors, (400), 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 559 [2022-07-19 12:45:57,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:45:57,948 INFO L225 Difference]: With dead ends: 233816 [2022-07-19 12:45:57,948 INFO L226 Difference]: Without dead ends: 126712 [2022-07-19 12:45:57,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 12:45:57,982 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 727 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 2298 mSolverCounterSat, 414 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 727 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 2712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 414 IncrementalHoareTripleChecker+Valid, 2298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-19 12:45:57,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [727 Valid, 237 Invalid, 2712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [414 Valid, 2298 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-07-19 12:45:58,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126712 states. [2022-07-19 12:45:59,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126712 to 107106. [2022-07-19 12:45:59,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107106 states, 107105 states have (on average 1.112263666495495) internal successors, (119129), 107105 states have internal predecessors, (119129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:45:59,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107106 states to 107106 states and 119129 transitions. [2022-07-19 12:45:59,596 INFO L78 Accepts]: Start accepts. Automaton has 107106 states and 119129 transitions. Word has length 559 [2022-07-19 12:45:59,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:45:59,596 INFO L495 AbstractCegarLoop]: Abstraction has 107106 states and 119129 transitions. [2022-07-19 12:45:59,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 100.0) internal successors, (400), 4 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:45:59,597 INFO L276 IsEmpty]: Start isEmpty. Operand 107106 states and 119129 transitions. [2022-07-19 12:45:59,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 612 [2022-07-19 12:45:59,611 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:45:59,611 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-19 12:45:59,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-19 12:45:59,612 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:45:59,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:45:59,612 INFO L85 PathProgramCache]: Analyzing trace with hash 645297198, now seen corresponding path program 1 times [2022-07-19 12:45:59,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:45:59,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826894329] [2022-07-19 12:45:59,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:45:59,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:45:59,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:45:59,802 INFO L134 CoverageAnalysis]: Checked inductivity of 880 backedges. 527 proven. 0 refuted. 0 times theorem prover too weak. 353 trivial. 0 not checked. [2022-07-19 12:45:59,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:45:59,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826894329] [2022-07-19 12:45:59,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826894329] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:45:59,803 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:45:59,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 12:45:59,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914326350] [2022-07-19 12:45:59,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:45:59,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:45:59,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:45:59,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:45:59,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:45:59,805 INFO L87 Difference]: Start difference. First operand 107106 states and 119129 transitions. Second operand has 3 states, 3 states have (on average 114.33333333333333) internal successors, (343), 2 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:46:01,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:46:01,253 INFO L93 Difference]: Finished difference Result 212497 states and 236323 transitions. [2022-07-19 12:46:01,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:46:01,254 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 114.33333333333333) internal successors, (343), 2 states have internal predecessors, (343), 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 611 [2022-07-19 12:46:01,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:46:01,586 INFO L225 Difference]: With dead ends: 212497 [2022-07-19 12:46:01,587 INFO L226 Difference]: Without dead ends: 105817 [2022-07-19 12:46:01,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:46:01,638 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 607 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 607 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-19 12:46:01,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [607 Valid, 103 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-19 12:46:01,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105817 states. [2022-07-19 12:46:02,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105817 to 104109. [2022-07-19 12:46:02,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104109 states, 104108 states have (on average 1.11209513197833) internal successors, (115778), 104108 states have internal predecessors, (115778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:46:02,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104109 states to 104109 states and 115778 transitions. [2022-07-19 12:46:02,866 INFO L78 Accepts]: Start accepts. Automaton has 104109 states and 115778 transitions. Word has length 611 [2022-07-19 12:46:02,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:46:02,866 INFO L495 AbstractCegarLoop]: Abstraction has 104109 states and 115778 transitions. [2022-07-19 12:46:02,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.33333333333333) internal successors, (343), 2 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:46:02,867 INFO L276 IsEmpty]: Start isEmpty. Operand 104109 states and 115778 transitions. [2022-07-19 12:46:02,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 612 [2022-07-19 12:46:02,885 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:46:02,885 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-19 12:46:02,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-19 12:46:02,886 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:46:02,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:46:02,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1455034320, now seen corresponding path program 1 times [2022-07-19 12:46:02,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:46:02,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856417679] [2022-07-19 12:46:02,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:46:02,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:46:02,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:46:03,382 INFO L134 CoverageAnalysis]: Checked inductivity of 880 backedges. 591 proven. 0 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2022-07-19 12:46:03,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:46:03,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856417679] [2022-07-19 12:46:03,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856417679] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:46:03,383 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:46:03,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 12:46:03,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826798367] [2022-07-19 12:46:03,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:46:03,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 12:46:03,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:46:03,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 12:46:03,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 12:46:03,385 INFO L87 Difference]: Start difference. First operand 104109 states and 115778 transitions. Second operand has 4 states, 4 states have (on average 101.5) internal successors, (406), 4 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:46:06,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:46:06,260 INFO L93 Difference]: Finished difference Result 212462 states and 235914 transitions. [2022-07-19 12:46:06,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 12:46:06,260 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 101.5) internal successors, (406), 4 states have internal predecessors, (406), 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 611 [2022-07-19 12:46:06,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:46:06,388 INFO L225 Difference]: With dead ends: 212462 [2022-07-19 12:46:06,388 INFO L226 Difference]: Without dead ends: 108780 [2022-07-19 12:46:06,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 12:46:06,417 INFO L413 NwaCegarLoop]: 670 mSDtfsCounter, 666 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 2703 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 666 SdHoareTripleChecker+Valid, 774 SdHoareTripleChecker+Invalid, 2807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 2703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-19 12:46:06,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [666 Valid, 774 Invalid, 2807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 2703 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-07-19 12:46:06,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108780 states. [2022-07-19 12:46:07,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108780 to 108763. [2022-07-19 12:46:07,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108763 states, 108762 states have (on average 1.1066732866258435) internal successors, (120364), 108762 states have internal predecessors, (120364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:46:07,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108763 states to 108763 states and 120364 transitions. [2022-07-19 12:46:07,795 INFO L78 Accepts]: Start accepts. Automaton has 108763 states and 120364 transitions. Word has length 611 [2022-07-19 12:46:07,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:46:07,796 INFO L495 AbstractCegarLoop]: Abstraction has 108763 states and 120364 transitions. [2022-07-19 12:46:07,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 101.5) internal successors, (406), 4 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:46:07,796 INFO L276 IsEmpty]: Start isEmpty. Operand 108763 states and 120364 transitions. [2022-07-19 12:46:07,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 633 [2022-07-19 12:46:07,818 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:46:07,819 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:46:07,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-19 12:46:07,819 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:46:07,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:46:07,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1908444143, now seen corresponding path program 1 times [2022-07-19 12:46:07,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:46:07,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755709323] [2022-07-19 12:46:07,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:46:07,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:46:07,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:46:08,035 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 255 proven. 0 refuted. 0 times theorem prover too weak. 510 trivial. 0 not checked. [2022-07-19 12:46:08,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:46:08,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755709323] [2022-07-19 12:46:08,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755709323] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:46:08,036 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:46:08,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:46:08,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135470853] [2022-07-19 12:46:08,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:46:08,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:46:08,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:46:08,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:46:08,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:46:08,039 INFO L87 Difference]: Start difference. First operand 108763 states and 120364 transitions. Second operand has 3 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:46:10,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:46:10,416 INFO L93 Difference]: Finished difference Result 231575 states and 255685 transitions. [2022-07-19 12:46:10,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:46:10,417 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 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 632 [2022-07-19 12:46:10,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:46:10,563 INFO L225 Difference]: With dead ends: 231575 [2022-07-19 12:46:10,563 INFO L226 Difference]: Without dead ends: 121114 [2022-07-19 12:46:10,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:46:10,629 INFO L413 NwaCegarLoop]: 733 mSDtfsCounter, 383 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1255 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 785 SdHoareTripleChecker+Invalid, 1369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-19 12:46:10,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [383 Valid, 785 Invalid, 1369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1255 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-19 12:46:10,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121114 states. [2022-07-19 12:46:12,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121114 to 119818. [2022-07-19 12:46:12,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119818 states, 119817 states have (on average 1.0977156830833688) internal successors, (131525), 119817 states have internal predecessors, (131525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:46:12,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119818 states to 119818 states and 131525 transitions. [2022-07-19 12:46:12,364 INFO L78 Accepts]: Start accepts. Automaton has 119818 states and 131525 transitions. Word has length 632 [2022-07-19 12:46:12,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:46:12,364 INFO L495 AbstractCegarLoop]: Abstraction has 119818 states and 131525 transitions. [2022-07-19 12:46:12,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:46:12,364 INFO L276 IsEmpty]: Start isEmpty. Operand 119818 states and 131525 transitions. [2022-07-19 12:46:12,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 642 [2022-07-19 12:46:12,382 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:46:12,382 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:46:12,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-19 12:46:12,383 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:46:12,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:46:12,383 INFO L85 PathProgramCache]: Analyzing trace with hash -820029852, now seen corresponding path program 1 times [2022-07-19 12:46:12,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:46:12,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770592862] [2022-07-19 12:46:12,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:46:12,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:46:12,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:46:12,915 INFO L134 CoverageAnalysis]: Checked inductivity of 503 backedges. 191 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-07-19 12:46:12,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:46:12,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770592862] [2022-07-19 12:46:12,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770592862] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:46:12,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:46:12,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:46:12,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159552674] [2022-07-19 12:46:12,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:46:12,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:46:12,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:46:12,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:46:12,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:46:12,919 INFO L87 Difference]: Start difference. First operand 119818 states and 131525 transitions. Second operand has 3 states, 3 states have (on average 137.66666666666666) internal successors, (413), 3 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:46:14,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:46:14,891 INFO L93 Difference]: Finished difference Result 241341 states and 265022 transitions. [2022-07-19 12:46:14,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:46:14,891 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 137.66666666666666) internal successors, (413), 3 states have internal predecessors, (413), 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 641 [2022-07-19 12:46:14,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:46:15,372 INFO L225 Difference]: With dead ends: 241341 [2022-07-19 12:46:15,373 INFO L226 Difference]: Without dead ends: 121524 [2022-07-19 12:46:15,433 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:46:15,436 INFO L413 NwaCegarLoop]: 625 mSDtfsCounter, 416 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 1225 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 1389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 1225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-19 12:46:15,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [416 Valid, 666 Invalid, 1389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 1225 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-19 12:46:15,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121524 states. [2022-07-19 12:46:16,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121524 to 120610. [2022-07-19 12:46:16,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120610 states, 120609 states have (on average 1.0891475760515383) internal successors, (131361), 120609 states have internal predecessors, (131361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:46:16,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120610 states to 120610 states and 131361 transitions. [2022-07-19 12:46:16,953 INFO L78 Accepts]: Start accepts. Automaton has 120610 states and 131361 transitions. Word has length 641 [2022-07-19 12:46:16,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:46:16,954 INFO L495 AbstractCegarLoop]: Abstraction has 120610 states and 131361 transitions. [2022-07-19 12:46:16,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 137.66666666666666) internal successors, (413), 3 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:46:16,954 INFO L276 IsEmpty]: Start isEmpty. Operand 120610 states and 131361 transitions. [2022-07-19 12:46:17,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 843 [2022-07-19 12:46:17,006 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:46:17,006 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:46:17,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-19 12:46:17,007 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:46:17,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:46:17,007 INFO L85 PathProgramCache]: Analyzing trace with hash 614174630, now seen corresponding path program 1 times [2022-07-19 12:46:17,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:46:17,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974741034] [2022-07-19 12:46:17,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:46:17,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:46:17,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:46:17,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1329 backedges. 319 proven. 0 refuted. 0 times theorem prover too weak. 1010 trivial. 0 not checked. [2022-07-19 12:46:17,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:46:17,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974741034] [2022-07-19 12:46:17,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974741034] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:46:17,704 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:46:17,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 12:46:17,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221099109] [2022-07-19 12:46:17,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:46:17,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 12:46:17,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:46:17,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 12:46:17,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-19 12:46:17,706 INFO L87 Difference]: Start difference. First operand 120610 states and 131361 transitions. Second operand has 5 states, 5 states have (on average 76.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:46:20,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:46:20,493 INFO L93 Difference]: Finished difference Result 241735 states and 263110 transitions. [2022-07-19 12:46:20,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 12:46:20,493 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 76.0) internal successors, (380), 4 states have internal predecessors, (380), 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 842 [2022-07-19 12:46:20,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:46:20,610 INFO L225 Difference]: With dead ends: 241735 [2022-07-19 12:46:20,610 INFO L226 Difference]: Without dead ends: 121030 [2022-07-19 12:46:20,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-19 12:46:20,651 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 837 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 2893 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 837 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 2991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 2893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-19 12:46:20,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [837 Valid, 201 Invalid, 2991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 2893 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-07-19 12:46:20,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121030 states. [2022-07-19 12:46:21,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121030 to 119752. [2022-07-19 12:46:22,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119752 states, 119751 states have (on average 1.0856443787525782) internal successors, (130007), 119751 states have internal predecessors, (130007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:46:22,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119752 states to 119752 states and 130007 transitions. [2022-07-19 12:46:22,151 INFO L78 Accepts]: Start accepts. Automaton has 119752 states and 130007 transitions. Word has length 842 [2022-07-19 12:46:22,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:46:22,152 INFO L495 AbstractCegarLoop]: Abstraction has 119752 states and 130007 transitions. [2022-07-19 12:46:22,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:46:22,152 INFO L276 IsEmpty]: Start isEmpty. Operand 119752 states and 130007 transitions. [2022-07-19 12:46:22,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 873 [2022-07-19 12:46:22,614 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:46:22,614 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-19 12:46:22,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-19 12:46:22,615 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:46:22,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:46:22,616 INFO L85 PathProgramCache]: Analyzing trace with hash -2081068811, now seen corresponding path program 1 times [2022-07-19 12:46:22,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:46:22,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128201883] [2022-07-19 12:46:22,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:46:22,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:46:22,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:46:22,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 931 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-19 12:46:22,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:46:22,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128201883] [2022-07-19 12:46:22,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128201883] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:46:22,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:46:22,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 12:46:22,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168191170] [2022-07-19 12:46:22,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:46:22,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 12:46:22,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:46:22,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 12:46:22,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 12:46:22,956 INFO L87 Difference]: Start difference. First operand 119752 states and 130007 transitions. Second operand has 4 states, 4 states have (on average 197.75) internal successors, (791), 4 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:46:25,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:46:25,957 INFO L93 Difference]: Finished difference Result 269290 states and 291547 transitions. [2022-07-19 12:46:25,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 12:46:25,959 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 197.75) internal successors, (791), 4 states have internal predecessors, (791), 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 872 [2022-07-19 12:46:25,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:46:26,120 INFO L225 Difference]: With dead ends: 269290 [2022-07-19 12:46:26,121 INFO L226 Difference]: Without dead ends: 149540 [2022-07-19 12:46:26,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 12:46:26,183 INFO L413 NwaCegarLoop]: 562 mSDtfsCounter, 341 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 2792 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 2982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 2792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-19 12:46:26,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 663 Invalid, 2982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 2792 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-19 12:46:26,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149540 states. [2022-07-19 12:46:27,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149540 to 144003. [2022-07-19 12:46:27,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144003 states, 144002 states have (on average 1.0817071985111317) internal successors, (155768), 144002 states have internal predecessors, (155768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:46:28,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144003 states to 144003 states and 155768 transitions. [2022-07-19 12:46:28,122 INFO L78 Accepts]: Start accepts. Automaton has 144003 states and 155768 transitions. Word has length 872 [2022-07-19 12:46:28,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:46:28,123 INFO L495 AbstractCegarLoop]: Abstraction has 144003 states and 155768 transitions. [2022-07-19 12:46:28,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 197.75) internal successors, (791), 4 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:46:28,124 INFO L276 IsEmpty]: Start isEmpty. Operand 144003 states and 155768 transitions. [2022-07-19 12:46:28,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 936 [2022-07-19 12:46:28,197 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:46:28,197 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-19 12:46:28,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-19 12:46:28,198 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:46:28,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:46:28,198 INFO L85 PathProgramCache]: Analyzing trace with hash -986437759, now seen corresponding path program 1 times [2022-07-19 12:46:28,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:46:28,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880081988] [2022-07-19 12:46:28,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:46:28,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:46:28,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat