./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem17_label16.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 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_label16.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 12946011ae947529b791d0ea774eddb13cd60d584cd7e2008a422f41653953d6 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 13:14:38,284 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 13:14:38,286 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 13:14:38,338 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 13:14:38,339 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 13:14:38,340 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 13:14:38,342 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 13:14:38,344 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 13:14:38,346 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 13:14:38,350 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 13:14:38,351 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 13:14:38,353 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 13:14:38,353 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 13:14:38,355 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 13:14:38,356 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 13:14:38,359 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 13:14:38,360 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 13:14:38,361 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 13:14:38,363 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 13:14:38,373 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 13:14:38,375 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 13:14:38,376 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 13:14:38,377 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 13:14:38,378 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 13:14:38,379 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 13:14:38,382 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 13:14:38,382 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 13:14:38,383 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 13:14:38,384 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 13:14:38,384 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 13:14:38,385 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 13:14:38,385 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 13:14:38,387 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 13:14:38,387 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 13:14:38,388 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 13:14:38,389 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 13:14:38,389 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 13:14:38,389 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 13:14:38,390 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 13:14:38,390 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 13:14:38,391 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 13:14:38,393 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 13:14:38,394 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 13:14:38,422 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 13:14:38,423 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 13:14:38,423 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 13:14:38,423 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 13:14:38,424 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 13:14:38,424 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 13:14:38,425 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 13:14:38,425 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 13:14:38,425 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 13:14:38,426 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 13:14:38,426 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 13:14:38,426 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 13:14:38,427 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 13:14:38,427 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 13:14:38,427 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 13:14:38,427 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 13:14:38,427 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 13:14:38,428 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 13:14:38,428 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 13:14:38,428 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 13:14:38,428 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 13:14:38,428 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 13:14:38,429 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 13:14:38,429 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 13:14:38,429 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 13:14:38,429 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 13:14:38,429 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 13:14:38,430 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 13:14:38,430 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 13:14:38,430 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 13:14:38,430 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 13:14:38,430 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 13:14:38,431 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 13:14:38,431 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 12946011ae947529b791d0ea774eddb13cd60d584cd7e2008a422f41653953d6 [2022-07-13 13:14:38,657 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 13:14:38,679 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 13:14:38,681 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 13:14:38,682 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 13:14:38,683 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 13:14:38,684 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem17_label16.c [2022-07-13 13:14:38,761 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31306bb54/e7353df19d014993b895a16ab0546c38/FLAG08036b5ed [2022-07-13 13:14:39,403 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 13:14:39,403 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label16.c [2022-07-13 13:14:39,427 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31306bb54/e7353df19d014993b895a16ab0546c38/FLAG08036b5ed [2022-07-13 13:14:39,756 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31306bb54/e7353df19d014993b895a16ab0546c38 [2022-07-13 13:14:39,758 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 13:14:39,760 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 13:14:39,762 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 13:14:39,762 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 13:14:39,765 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 13:14:39,766 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 01:14:39" (1/1) ... [2022-07-13 13:14:39,768 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@436511bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:14:39, skipping insertion in model container [2022-07-13 13:14:39,768 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 01:14:39" (1/1) ... [2022-07-13 13:14:39,774 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 13:14:39,861 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 13:14:40,067 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_label16.c[3929,3942] [2022-07-13 13:14:40,630 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 13:14:40,637 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 13:14:40,662 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_label16.c[3929,3942] [2022-07-13 13:14:40,889 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 13:14:40,904 INFO L208 MainTranslator]: Completed translation [2022-07-13 13:14:40,905 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:14:40 WrapperNode [2022-07-13 13:14:40,905 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 13:14:40,906 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 13:14:40,906 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 13:14:40,907 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 13:14:40,913 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:14:40" (1/1) ... [2022-07-13 13:14:40,968 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:14:40" (1/1) ... [2022-07-13 13:14:41,258 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2611 [2022-07-13 13:14:41,258 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 13:14:41,260 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 13:14:41,260 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 13:14:41,260 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 13:14:41,268 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:14:40" (1/1) ... [2022-07-13 13:14:41,268 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:14:40" (1/1) ... [2022-07-13 13:14:41,316 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:14:40" (1/1) ... [2022-07-13 13:14:41,316 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:14:40" (1/1) ... [2022-07-13 13:14:41,445 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:14:40" (1/1) ... [2022-07-13 13:14:41,471 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:14:40" (1/1) ... [2022-07-13 13:14:41,516 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:14:40" (1/1) ... [2022-07-13 13:14:41,575 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 13:14:41,577 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 13:14:41,578 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 13:14:41,578 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 13:14:41,579 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:14:40" (1/1) ... [2022-07-13 13:14:41,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 13:14:41,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 13:14:41,621 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) [2022-07-13 13:14:41,646 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 [2022-07-13 13:14:41,662 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 13:14:41,662 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 13:14:41,662 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 13:14:41,663 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 13:14:41,733 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 13:14:41,735 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 13:14:44,604 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 13:14:44,616 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 13:14:44,616 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-13 13:14:44,619 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 01:14:44 BoogieIcfgContainer [2022-07-13 13:14:44,619 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 13:14:44,621 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 13:14:44,621 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 13:14:44,624 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 13:14:44,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 01:14:39" (1/3) ... [2022-07-13 13:14:44,625 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39db446c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 01:14:44, skipping insertion in model container [2022-07-13 13:14:44,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:14:40" (2/3) ... [2022-07-13 13:14:44,625 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39db446c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 01:14:44, skipping insertion in model container [2022-07-13 13:14:44,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 01:14:44" (3/3) ... [2022-07-13 13:14:44,627 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label16.c [2022-07-13 13:14:44,639 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 13:14:44,640 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 13:14:44,692 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 13:14:44,698 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@273c8aa4, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2a64f0c8 [2022-07-13 13:14:44,699 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 13:14:44,705 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) [2022-07-13 13:14:44,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-13 13:14:44,712 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:14:44,712 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] [2022-07-13 13:14:44,713 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:14:44,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:14:44,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1225036359, now seen corresponding path program 1 times [2022-07-13 13:14:44,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:14:44,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529999542] [2022-07-13 13:14:44,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:14:44,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:14:44,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:14:44,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 13:14:44,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:14:44,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529999542] [2022-07-13 13:14:44,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529999542] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:14:44,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:14:44,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 13:14:44,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212585654] [2022-07-13 13:14:44,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:14:44,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:14:44,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:14:44,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:14:44,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:14:44,976 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 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:14:47,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:14:47,601 INFO L93 Difference]: Finished difference Result 1644 states and 3029 transitions. [2022-07-13 13:14:47,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:14:47,604 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2022-07-13 13:14:47,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:14:47,620 INFO L225 Difference]: With dead ends: 1644 [2022-07-13 13:14:47,620 INFO L226 Difference]: Without dead ends: 977 [2022-07-13 13:14:47,626 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 [2022-07-13 13:14:47,629 INFO L413 NwaCegarLoop]: 425 mSDtfsCounter, 463 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 1470 mSolverCounterSat, 332 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 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 [2022-07-13 13:14:47,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [463 Valid, 503 Invalid, 1802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [332 Valid, 1470 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-13 13:14:47,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2022-07-13 13:14:47,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 971. [2022-07-13 13:14:47,708 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) [2022-07-13 13:14:47,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 1507 transitions. [2022-07-13 13:14:47,712 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 1507 transitions. Word has length 25 [2022-07-13 13:14:47,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:14:47,713 INFO L495 AbstractCegarLoop]: Abstraction has 971 states and 1507 transitions. [2022-07-13 13:14:47,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:14:47,713 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 1507 transitions. [2022-07-13 13:14:47,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-07-13 13:14:47,716 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:14:47,716 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:14:47,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 13:14:47,717 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:14:47,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:14:47,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1947080830, now seen corresponding path program 1 times [2022-07-13 13:14:47,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:14:47,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218832330] [2022-07-13 13:14:47,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:14:47,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:14:47,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:14:47,904 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 13:14:47,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:14:47,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218832330] [2022-07-13 13:14:47,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218832330] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:14:47,905 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:14:47,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 13:14:47,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718748882] [2022-07-13 13:14:47,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:14:47,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:14:47,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:14:47,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:14:47,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:14:47,909 INFO L87 Difference]: Start difference. First operand 971 states and 1507 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:14:50,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:14:50,117 INFO L93 Difference]: Finished difference Result 2813 states and 4381 transitions. [2022-07-13 13:14:50,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:14:50,118 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 0 states have call successors, (0), 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 92 [2022-07-13 13:14:50,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:14:50,125 INFO L225 Difference]: With dead ends: 2813 [2022-07-13 13:14:50,125 INFO L226 Difference]: Without dead ends: 1844 [2022-07-13 13:14:50,132 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 [2022-07-13 13:14:50,134 INFO L413 NwaCegarLoop]: 506 mSDtfsCounter, 405 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1381 mSolverCounterSat, 325 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 1706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 325 IncrementalHoareTripleChecker+Valid, 1381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-13 13:14:50,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [405 Valid, 579 Invalid, 1706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [325 Valid, 1381 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-07-13 13:14:50,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2022-07-13 13:14:50,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 1841. [2022-07-13 13:14:50,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1841 states, 1840 states have (on average 1.35) internal successors, (2484), 1840 states have internal predecessors, (2484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:14:50,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1841 states to 1841 states and 2484 transitions. [2022-07-13 13:14:50,187 INFO L78 Accepts]: Start accepts. Automaton has 1841 states and 2484 transitions. Word has length 92 [2022-07-13 13:14:50,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:14:50,189 INFO L495 AbstractCegarLoop]: Abstraction has 1841 states and 2484 transitions. [2022-07-13 13:14:50,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:14:50,190 INFO L276 IsEmpty]: Start isEmpty. Operand 1841 states and 2484 transitions. [2022-07-13 13:14:50,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-07-13 13:14:50,197 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:14:50,197 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:14:50,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 13:14:50,200 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:14:50,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:14:50,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1701944076, now seen corresponding path program 1 times [2022-07-13 13:14:50,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:14:50,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105339329] [2022-07-13 13:14:50,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:14:50,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:14:50,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:14:50,392 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 13:14:50,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:14:50,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105339329] [2022-07-13 13:14:50,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105339329] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:14:50,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:14:50,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:14:50,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747319905] [2022-07-13 13:14:50,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:14:50,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 13:14:50,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:14:50,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 13:14:50,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 13:14:50,395 INFO L87 Difference]: Start difference. First operand 1841 states and 2484 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:14:53,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:14:53,983 INFO L93 Difference]: Finished difference Result 6767 states and 9259 transitions. [2022-07-13 13:14:53,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 13:14:53,984 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 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 95 [2022-07-13 13:14:53,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:14:54,039 INFO L225 Difference]: With dead ends: 6767 [2022-07-13 13:14:54,039 INFO L226 Difference]: Without dead ends: 4928 [2022-07-13 13:14:54,042 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 [2022-07-13 13:14:54,043 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 890 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 2790 mSolverCounterSat, 594 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 890 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 3384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 594 IncrementalHoareTripleChecker+Valid, 2790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-07-13 13:14:54,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [890 Valid, 328 Invalid, 3384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [594 Valid, 2790 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-07-13 13:14:54,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4928 states. [2022-07-13 13:14:54,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4928 to 4875. [2022-07-13 13:14:54,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4875 states, 4874 states have (on average 1.2866228970045137) internal successors, (6271), 4874 states have internal predecessors, (6271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:14:54,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4875 states to 4875 states and 6271 transitions. [2022-07-13 13:14:54,130 INFO L78 Accepts]: Start accepts. Automaton has 4875 states and 6271 transitions. Word has length 95 [2022-07-13 13:14:54,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:14:54,131 INFO L495 AbstractCegarLoop]: Abstraction has 4875 states and 6271 transitions. [2022-07-13 13:14:54,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:14:54,132 INFO L276 IsEmpty]: Start isEmpty. Operand 4875 states and 6271 transitions. [2022-07-13 13:14:54,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-07-13 13:14:54,139 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:14:54,140 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-13 13:14:54,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 13:14:54,140 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:14:54,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:14:54,143 INFO L85 PathProgramCache]: Analyzing trace with hash -106790988, now seen corresponding path program 1 times [2022-07-13 13:14:54,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:14:54,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139701542] [2022-07-13 13:14:54,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:14:54,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:14:54,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:14:54,314 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-07-13 13:14:54,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:14:54,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139701542] [2022-07-13 13:14:54,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139701542] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:14:54,317 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:14:54,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 13:14:54,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162154063] [2022-07-13 13:14:54,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:14:54,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:14:54,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:14:54,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:14:54,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:14:54,320 INFO L87 Difference]: Start difference. First operand 4875 states and 6271 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 2 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:14:56,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:14:56,019 INFO L93 Difference]: Finished difference Result 14436 states and 18544 transitions. [2022-07-13 13:14:56,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:14:56,023 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 2 states have internal predecessors, (97), 0 states have call successors, (0), 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 164 [2022-07-13 13:14:56,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:14:56,070 INFO L225 Difference]: With dead ends: 14436 [2022-07-13 13:14:56,070 INFO L226 Difference]: Without dead ends: 8277 [2022-07-13 13:14:56,080 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 [2022-07-13 13:14:56,085 INFO L413 NwaCegarLoop]: 516 mSDtfsCounter, 386 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s 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, 1.6s IncrementalHoareTripleChecker+Time [2022-07-13 13:14:56,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [386 Valid, 591 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-13 13:14:56,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8277 states. [2022-07-13 13:14:56,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8277 to 6576. [2022-07-13 13:14:56,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6576 states, 6575 states have (on average 1.1793155893536122) internal successors, (7754), 6575 states have internal predecessors, (7754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:14:56,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6576 states to 6576 states and 7754 transitions. [2022-07-13 13:14:56,244 INFO L78 Accepts]: Start accepts. Automaton has 6576 states and 7754 transitions. Word has length 164 [2022-07-13 13:14:56,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:14:56,246 INFO L495 AbstractCegarLoop]: Abstraction has 6576 states and 7754 transitions. [2022-07-13 13:14:56,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 2 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:14:56,246 INFO L276 IsEmpty]: Start isEmpty. Operand 6576 states and 7754 transitions. [2022-07-13 13:14:56,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-07-13 13:14:56,248 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:14:56,248 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:14:56,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 13:14:56,249 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:14:56,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:14:56,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1141369514, now seen corresponding path program 1 times [2022-07-13 13:14:56,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:14:56,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299302130] [2022-07-13 13:14:56,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:14:56,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:14:56,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:14:56,382 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 13:14:56,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:14:56,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299302130] [2022-07-13 13:14:56,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299302130] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:14:56,383 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:14:56,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:14:56,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46047780] [2022-07-13 13:14:56,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:14:56,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:14:56,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:14:56,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:14:56,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:14:56,386 INFO L87 Difference]: Start difference. First operand 6576 states and 7754 transitions. Second operand has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:14:58,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:14:58,104 INFO L93 Difference]: Finished difference Result 16560 states and 19931 transitions. [2022-07-13 13:14:58,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:14:58,104 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 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 177 [2022-07-13 13:14:58,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:14:58,136 INFO L225 Difference]: With dead ends: 16560 [2022-07-13 13:14:58,136 INFO L226 Difference]: Without dead ends: 9986 [2022-07-13 13:14:58,145 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 [2022-07-13 13:14:58,146 INFO L413 NwaCegarLoop]: 743 mSDtfsCounter, 496 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1227 mSolverCounterSat, 321 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 801 SdHoareTripleChecker+Invalid, 1548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 321 IncrementalHoareTripleChecker+Valid, 1227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-13 13:14:58,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [496 Valid, 801 Invalid, 1548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [321 Valid, 1227 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-13 13:14:58,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9986 states. [2022-07-13 13:14:58,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9986 to 9986. [2022-07-13 13:14:58,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9986 states, 9985 states have (on average 1.1696544817225838) internal successors, (11679), 9985 states have internal predecessors, (11679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:14:58,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9986 states to 9986 states and 11679 transitions. [2022-07-13 13:14:58,358 INFO L78 Accepts]: Start accepts. Automaton has 9986 states and 11679 transitions. Word has length 177 [2022-07-13 13:14:58,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:14:58,360 INFO L495 AbstractCegarLoop]: Abstraction has 9986 states and 11679 transitions. [2022-07-13 13:14:58,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:14:58,363 INFO L276 IsEmpty]: Start isEmpty. Operand 9986 states and 11679 transitions. [2022-07-13 13:14:58,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-07-13 13:14:58,365 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:14:58,365 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-13 13:14:58,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 13:14:58,366 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:14:58,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:14:58,366 INFO L85 PathProgramCache]: Analyzing trace with hash 3113787, now seen corresponding path program 1 times [2022-07-13 13:14:58,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:14:58,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496752422] [2022-07-13 13:14:58,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:14:58,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:14:58,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:14:58,467 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-07-13 13:14:58,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:14:58,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496752422] [2022-07-13 13:14:58,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496752422] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:14:58,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:14:58,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:14:58,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501373964] [2022-07-13 13:14:58,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:14:58,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:14:58,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:14:58,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:14:58,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:14:58,470 INFO L87 Difference]: Start difference. First operand 9986 states and 11679 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:00,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:15:00,504 INFO L93 Difference]: Finished difference Result 25067 states and 29587 transitions. [2022-07-13 13:15:00,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:15:00,505 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 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 179 [2022-07-13 13:15:00,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:15:00,541 INFO L225 Difference]: With dead ends: 25067 [2022-07-13 13:15:00,542 INFO L226 Difference]: Without dead ends: 15083 [2022-07-13 13:15:00,592 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 [2022-07-13 13:15:00,594 INFO L413 NwaCegarLoop]: 422 mSDtfsCounter, 429 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 1278 mSolverCounterSat, 318 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 1596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 1278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-13 13:15:00,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [429 Valid, 486 Invalid, 1596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 1278 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-13 13:15:00,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15083 states. [2022-07-13 13:15:00,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15083 to 10384. [2022-07-13 13:15:00,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10384 states, 10383 states have (on average 1.1651738418568813) internal successors, (12098), 10383 states have internal predecessors, (12098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:00,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10384 states to 10384 states and 12098 transitions. [2022-07-13 13:15:00,795 INFO L78 Accepts]: Start accepts. Automaton has 10384 states and 12098 transitions. Word has length 179 [2022-07-13 13:15:00,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:15:00,796 INFO L495 AbstractCegarLoop]: Abstraction has 10384 states and 12098 transitions. [2022-07-13 13:15:00,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:00,797 INFO L276 IsEmpty]: Start isEmpty. Operand 10384 states and 12098 transitions. [2022-07-13 13:15:00,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-07-13 13:15:00,799 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:15:00,799 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-13 13:15:00,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 13:15:00,800 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:15:00,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:15:00,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1690682791, now seen corresponding path program 1 times [2022-07-13 13:15:00,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:15:00,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333462722] [2022-07-13 13:15:00,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:15:00,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:15:00,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:15:00,908 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-13 13:15:00,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:15:00,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333462722] [2022-07-13 13:15:00,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333462722] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:15:00,909 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:15:00,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:15:00,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819531016] [2022-07-13 13:15:00,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:15:00,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:15:00,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:15:00,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:15:00,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:15:00,911 INFO L87 Difference]: Start difference. First operand 10384 states and 12098 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:02,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:15:02,750 INFO L93 Difference]: Finished difference Result 25874 states and 30417 transitions. [2022-07-13 13:15:02,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:15:02,751 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 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 192 [2022-07-13 13:15:02,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:15:02,776 INFO L225 Difference]: With dead ends: 25874 [2022-07-13 13:15:02,777 INFO L226 Difference]: Without dead ends: 15492 [2022-07-13 13:15:02,788 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 [2022-07-13 13:15:02,788 INFO L413 NwaCegarLoop]: 390 mSDtfsCounter, 453 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1345 mSolverCounterSat, 303 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 1648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 303 IncrementalHoareTripleChecker+Valid, 1345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-13 13:15:02,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [453 Valid, 448 Invalid, 1648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [303 Valid, 1345 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-13 13:15:02,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15492 states. [2022-07-13 13:15:02,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15492 to 13778. [2022-07-13 13:15:02,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13778 states, 13777 states have (on average 1.166509399724178) internal successors, (16071), 13777 states have internal predecessors, (16071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:02,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13778 states to 13778 states and 16071 transitions. [2022-07-13 13:15:02,992 INFO L78 Accepts]: Start accepts. Automaton has 13778 states and 16071 transitions. Word has length 192 [2022-07-13 13:15:02,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:15:02,993 INFO L495 AbstractCegarLoop]: Abstraction has 13778 states and 16071 transitions. [2022-07-13 13:15:02,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:02,993 INFO L276 IsEmpty]: Start isEmpty. Operand 13778 states and 16071 transitions. [2022-07-13 13:15:02,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2022-07-13 13:15:02,997 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:15:02,997 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-13 13:15:02,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-13 13:15:02,998 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:15:02,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:15:02,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1691584357, now seen corresponding path program 1 times [2022-07-13 13:15:02,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:15:02,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721886593] [2022-07-13 13:15:02,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:15:02,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:15:03,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:15:03,126 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-13 13:15:03,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:15:03,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721886593] [2022-07-13 13:15:03,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721886593] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:15:03,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:15:03,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:15:03,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031920999] [2022-07-13 13:15:03,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:15:03,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:15:03,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:15:03,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:15:03,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:15:03,129 INFO L87 Difference]: Start difference. First operand 13778 states and 16071 transitions. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:05,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:15:05,207 INFO L93 Difference]: Finished difference Result 32234 states and 37932 transitions. [2022-07-13 13:15:05,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:15:05,208 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 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 224 [2022-07-13 13:15:05,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:15:05,239 INFO L225 Difference]: With dead ends: 32234 [2022-07-13 13:15:05,239 INFO L226 Difference]: Without dead ends: 18458 [2022-07-13 13:15:05,249 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 [2022-07-13 13:15:05,250 INFO L413 NwaCegarLoop]: 372 mSDtfsCounter, 467 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1390 mSolverCounterSat, 284 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 1674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 284 IncrementalHoareTripleChecker+Valid, 1390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-13 13:15:05,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [467 Valid, 416 Invalid, 1674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [284 Valid, 1390 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-13 13:15:05,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18458 states. [2022-07-13 13:15:05,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18458 to 17176. [2022-07-13 13:15:05,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17176 states, 17175 states have (on average 1.1833478893740903) internal successors, (20324), 17175 states have internal predecessors, (20324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:05,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17176 states to 17176 states and 20324 transitions. [2022-07-13 13:15:05,457 INFO L78 Accepts]: Start accepts. Automaton has 17176 states and 20324 transitions. Word has length 224 [2022-07-13 13:15:05,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:15:05,457 INFO L495 AbstractCegarLoop]: Abstraction has 17176 states and 20324 transitions. [2022-07-13 13:15:05,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:05,458 INFO L276 IsEmpty]: Start isEmpty. Operand 17176 states and 20324 transitions. [2022-07-13 13:15:05,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2022-07-13 13:15:05,461 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:15:05,461 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-13 13:15:05,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-13 13:15:05,462 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:15:05,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:15:05,462 INFO L85 PathProgramCache]: Analyzing trace with hash 852276715, now seen corresponding path program 1 times [2022-07-13 13:15:05,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:15:05,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219387502] [2022-07-13 13:15:05,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:15:05,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:15:05,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:15:05,587 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 13:15:05,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:15:05,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219387502] [2022-07-13 13:15:05,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219387502] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:15:05,588 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:15:05,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:15:05,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705040225] [2022-07-13 13:15:05,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:15:05,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:15:05,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:15:05,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:15:05,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:15:05,591 INFO L87 Difference]: Start difference. First operand 17176 states and 20324 transitions. Second operand has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:07,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:15:07,471 INFO L93 Difference]: Finished difference Result 39057 states and 46415 transitions. [2022-07-13 13:15:07,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:15:07,472 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 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 241 [2022-07-13 13:15:07,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:15:07,508 INFO L225 Difference]: With dead ends: 39057 [2022-07-13 13:15:07,508 INFO L226 Difference]: Without dead ends: 21458 [2022-07-13 13:15:07,523 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 [2022-07-13 13:15:07,524 INFO L413 NwaCegarLoop]: 790 mSDtfsCounter, 356 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 1278 mSolverCounterSat, 302 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 864 SdHoareTripleChecker+Invalid, 1580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 302 IncrementalHoareTripleChecker+Valid, 1278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-13 13:15:07,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 864 Invalid, 1580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [302 Valid, 1278 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-13 13:15:07,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21458 states. [2022-07-13 13:15:07,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21458 to 21025. [2022-07-13 13:15:07,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21025 states, 21024 states have (on average 1.1667142313546424) internal successors, (24529), 21024 states have internal predecessors, (24529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:07,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21025 states to 21025 states and 24529 transitions. [2022-07-13 13:15:07,778 INFO L78 Accepts]: Start accepts. Automaton has 21025 states and 24529 transitions. Word has length 241 [2022-07-13 13:15:07,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:15:07,778 INFO L495 AbstractCegarLoop]: Abstraction has 21025 states and 24529 transitions. [2022-07-13 13:15:07,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:07,779 INFO L276 IsEmpty]: Start isEmpty. Operand 21025 states and 24529 transitions. [2022-07-13 13:15:07,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2022-07-13 13:15:07,782 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:15:07,782 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:15:07,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-13 13:15:07,783 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:15:07,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:15:07,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1233843982, now seen corresponding path program 1 times [2022-07-13 13:15:07,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:15:07,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848713457] [2022-07-13 13:15:07,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:15:07,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:15:07,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:15:07,906 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 184 proven. 70 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-13 13:15:07,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:15:07,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848713457] [2022-07-13 13:15:07,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848713457] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 13:15:07,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054542666] [2022-07-13 13:15:07,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:15:07,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 13:15:07,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 13:15:07,911 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) [2022-07-13 13:15:07,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 13:15:08,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:15:08,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 13:15:08,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 13:15:08,690 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 184 proven. 70 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-13 13:15:08,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 13:15:08,923 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 254 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-13 13:15:08,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054542666] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-13 13:15:08,924 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-13 13:15:08,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2022-07-13 13:15:08,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927880103] [2022-07-13 13:15:08,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:15:08,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 13:15:08,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:15:08,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 13:15:08,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-13 13:15:08,926 INFO L87 Difference]: Start difference. First operand 21025 states and 24529 transitions. Second operand has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:12,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:15:12,207 INFO L93 Difference]: Finished difference Result 59100 states and 69388 transitions. [2022-07-13 13:15:12,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 13:15:12,208 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 249 [2022-07-13 13:15:12,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:15:12,241 INFO L225 Difference]: With dead ends: 59100 [2022-07-13 13:15:12,241 INFO L226 Difference]: Without dead ends: 37213 [2022-07-13 13:15:12,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 493 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-13 13:15:12,253 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 879 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 2289 mSolverCounterSat, 727 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 879 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 3016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 727 IncrementalHoareTripleChecker+Valid, 2289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-07-13 13:15:12,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [879 Valid, 158 Invalid, 3016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [727 Valid, 2289 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-07-13 13:15:12,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37213 states. [2022-07-13 13:15:12,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37213 to 35506. [2022-07-13 13:15:12,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35506 states, 35505 states have (on average 1.1591043514997887) internal successors, (41154), 35505 states have internal predecessors, (41154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:12,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35506 states to 35506 states and 41154 transitions. [2022-07-13 13:15:12,665 INFO L78 Accepts]: Start accepts. Automaton has 35506 states and 41154 transitions. Word has length 249 [2022-07-13 13:15:12,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:15:12,666 INFO L495 AbstractCegarLoop]: Abstraction has 35506 states and 41154 transitions. [2022-07-13 13:15:12,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:12,666 INFO L276 IsEmpty]: Start isEmpty. Operand 35506 states and 41154 transitions. [2022-07-13 13:15:12,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2022-07-13 13:15:12,670 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:15:12,670 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:15:12,699 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-13 13:15:12,885 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,SelfDestructingSolverStorable9 [2022-07-13 13:15:12,885 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:15:12,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:15:12,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1742275879, now seen corresponding path program 1 times [2022-07-13 13:15:12,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:15:12,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322537556] [2022-07-13 13:15:12,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:15:12,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:15:12,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:15:13,038 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 178 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-07-13 13:15:13,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:15:13,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322537556] [2022-07-13 13:15:13,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322537556] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:15:13,039 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:15:13,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:15:13,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510805992] [2022-07-13 13:15:13,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:15:13,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:15:13,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:15:13,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:15:13,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:15:13,042 INFO L87 Difference]: Start difference. First operand 35506 states and 41154 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:14,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:15:14,814 INFO L93 Difference]: Finished difference Result 78654 states and 91329 transitions. [2022-07-13 13:15:14,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:15:14,814 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 257 [2022-07-13 13:15:14,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:15:14,862 INFO L225 Difference]: With dead ends: 78654 [2022-07-13 13:15:14,862 INFO L226 Difference]: Without dead ends: 42723 [2022-07-13 13:15:14,890 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 [2022-07-13 13:15:14,891 INFO L413 NwaCegarLoop]: 784 mSDtfsCounter, 380 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 1190 mSolverCounterSat, 233 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 850 SdHoareTripleChecker+Invalid, 1423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 233 IncrementalHoareTripleChecker+Valid, 1190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-13 13:15:14,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [380 Valid, 850 Invalid, 1423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [233 Valid, 1190 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-13 13:15:14,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42723 states. [2022-07-13 13:15:15,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42723 to 42723. [2022-07-13 13:15:15,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42723 states, 42722 states have (on average 1.1170825335892514) internal successors, (47724), 42722 states have internal predecessors, (47724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:15,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42723 states to 42723 states and 47724 transitions. [2022-07-13 13:15:15,516 INFO L78 Accepts]: Start accepts. Automaton has 42723 states and 47724 transitions. Word has length 257 [2022-07-13 13:15:15,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:15:15,516 INFO L495 AbstractCegarLoop]: Abstraction has 42723 states and 47724 transitions. [2022-07-13 13:15:15,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:15,517 INFO L276 IsEmpty]: Start isEmpty. Operand 42723 states and 47724 transitions. [2022-07-13 13:15:15,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2022-07-13 13:15:15,527 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:15:15,528 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:15:15,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-13 13:15:15,528 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:15:15,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:15:15,529 INFO L85 PathProgramCache]: Analyzing trace with hash 2014465041, now seen corresponding path program 1 times [2022-07-13 13:15:15,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:15:15,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016970318] [2022-07-13 13:15:15,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:15:15,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:15:15,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:15:15,681 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 325 proven. 73 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-07-13 13:15:15,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:15:15,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016970318] [2022-07-13 13:15:15,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016970318] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 13:15:15,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137046127] [2022-07-13 13:15:15,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:15:15,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 13:15:15,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 13:15:15,684 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) [2022-07-13 13:15:15,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 13:15:15,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:15:15,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 13:15:15,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 13:15:16,335 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 325 proven. 73 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-07-13 13:15:16,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 13:15:16,565 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 398 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-07-13 13:15:16,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137046127] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-13 13:15:16,565 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-13 13:15:16,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2022-07-13 13:15:16,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199909977] [2022-07-13 13:15:16,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:15:16,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 13:15:16,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:15:16,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 13:15:16,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-13 13:15:16,568 INFO L87 Difference]: Start difference. First operand 42723 states and 47724 transitions. Second operand has 4 states, 4 states have (on average 58.0) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:19,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:15:19,567 INFO L93 Difference]: Finished difference Result 101643 states and 113664 transitions. [2022-07-13 13:15:19,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 13:15:19,567 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 58.0) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 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 323 [2022-07-13 13:15:19,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:15:19,634 INFO L225 Difference]: With dead ends: 101643 [2022-07-13 13:15:19,634 INFO L226 Difference]: Without dead ends: 58493 [2022-07-13 13:15:19,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 647 GetRequests, 641 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-13 13:15:19,662 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 841 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 2332 mSolverCounterSat, 492 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 841 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 2824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 492 IncrementalHoareTripleChecker+Valid, 2332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-07-13 13:15:19,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [841 Valid, 189 Invalid, 2824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [492 Valid, 2332 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-07-13 13:15:19,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58493 states. [2022-07-13 13:15:20,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58493 to 55940. [2022-07-13 13:15:20,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55940 states, 55939 states have (on average 1.1210604408373406) internal successors, (62711), 55939 states have internal predecessors, (62711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:20,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55940 states to 55940 states and 62711 transitions. [2022-07-13 13:15:20,359 INFO L78 Accepts]: Start accepts. Automaton has 55940 states and 62711 transitions. Word has length 323 [2022-07-13 13:15:20,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:15:20,360 INFO L495 AbstractCegarLoop]: Abstraction has 55940 states and 62711 transitions. [2022-07-13 13:15:20,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.0) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:20,360 INFO L276 IsEmpty]: Start isEmpty. Operand 55940 states and 62711 transitions. [2022-07-13 13:15:20,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 421 [2022-07-13 13:15:20,369 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:15:20,369 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2022-07-13 13:15:20,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 13:15:20,583 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,SelfDestructingSolverStorable11 [2022-07-13 13:15:20,584 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:15:20,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:15:20,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1093920703, now seen corresponding path program 1 times [2022-07-13 13:15:20,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:15:20,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200118679] [2022-07-13 13:15:20,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:15:20,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:15:20,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:15:20,745 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 352 proven. 0 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2022-07-13 13:15:20,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:15:20,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200118679] [2022-07-13 13:15:20,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200118679] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:15:20,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:15:20,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:15:20,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542181300] [2022-07-13 13:15:20,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:15:20,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:15:20,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:15:20,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:15:20,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:15:20,749 INFO L87 Difference]: Start difference. First operand 55940 states and 62711 transitions. Second operand has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:22,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:15:22,712 INFO L93 Difference]: Finished difference Result 121241 states and 135987 transitions. [2022-07-13 13:15:22,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:15:22,713 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 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 420 [2022-07-13 13:15:22,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:15:22,788 INFO L225 Difference]: With dead ends: 121241 [2022-07-13 13:15:22,788 INFO L226 Difference]: Without dead ends: 64878 [2022-07-13 13:15:22,965 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 [2022-07-13 13:15:22,973 INFO L413 NwaCegarLoop]: 717 mSDtfsCounter, 339 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1155 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 774 SdHoareTripleChecker+Invalid, 1414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 1155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-13 13:15:22,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [339 Valid, 774 Invalid, 1414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 1155 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-13 13:15:23,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64878 states. [2022-07-13 13:15:23,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64878 to 53350. [2022-07-13 13:15:23,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53350 states, 53349 states have (on average 1.1076871169094078) internal successors, (59094), 53349 states have internal predecessors, (59094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:23,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53350 states to 53350 states and 59094 transitions. [2022-07-13 13:15:23,554 INFO L78 Accepts]: Start accepts. Automaton has 53350 states and 59094 transitions. Word has length 420 [2022-07-13 13:15:23,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:15:23,554 INFO L495 AbstractCegarLoop]: Abstraction has 53350 states and 59094 transitions. [2022-07-13 13:15:23,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:23,555 INFO L276 IsEmpty]: Start isEmpty. Operand 53350 states and 59094 transitions. [2022-07-13 13:15:23,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 422 [2022-07-13 13:15:23,563 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:15:23,564 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2022-07-13 13:15:23,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-13 13:15:23,564 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:15:23,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:15:23,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1117070252, now seen corresponding path program 1 times [2022-07-13 13:15:23,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:15:23,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273941558] [2022-07-13 13:15:23,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:15:23,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:15:23,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:15:23,902 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 494 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-07-13 13:15:23,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:15:23,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273941558] [2022-07-13 13:15:23,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273941558] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:15:23,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:15:23,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:15:23,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726735121] [2022-07-13 13:15:23,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:15:23,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:15:23,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:15:23,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:15:23,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:15:23,907 INFO L87 Difference]: Start difference. First operand 53350 states and 59094 transitions. Second operand has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:25,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:15:25,865 INFO L93 Difference]: Finished difference Result 119901 states and 132834 transitions. [2022-07-13 13:15:25,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:15:25,866 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 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 421 [2022-07-13 13:15:25,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:15:25,936 INFO L225 Difference]: With dead ends: 119901 [2022-07-13 13:15:25,936 INFO L226 Difference]: Without dead ends: 63990 [2022-07-13 13:15:25,969 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 [2022-07-13 13:15:25,969 INFO L413 NwaCegarLoop]: 620 mSDtfsCounter, 437 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 1196 mSolverCounterSat, 311 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 1507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 311 IncrementalHoareTripleChecker+Valid, 1196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-13 13:15:25,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [437 Valid, 659 Invalid, 1507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [311 Valid, 1196 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-13 13:15:26,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63990 states. [2022-07-13 13:15:26,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63990 to 61851. [2022-07-13 13:15:26,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61851 states, 61850 states have (on average 1.0961196443007275) internal successors, (67795), 61850 states have internal predecessors, (67795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:26,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61851 states to 61851 states and 67795 transitions. [2022-07-13 13:15:26,742 INFO L78 Accepts]: Start accepts. Automaton has 61851 states and 67795 transitions. Word has length 421 [2022-07-13 13:15:26,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:15:26,743 INFO L495 AbstractCegarLoop]: Abstraction has 61851 states and 67795 transitions. [2022-07-13 13:15:26,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:26,743 INFO L276 IsEmpty]: Start isEmpty. Operand 61851 states and 67795 transitions. [2022-07-13 13:15:26,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2022-07-13 13:15:26,753 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:15:26,754 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2022-07-13 13:15:26,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-13 13:15:26,754 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:15:26,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:15:26,755 INFO L85 PathProgramCache]: Analyzing trace with hash 377993779, now seen corresponding path program 1 times [2022-07-13 13:15:26,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:15:26,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052521473] [2022-07-13 13:15:26,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:15:26,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:15:26,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:15:26,903 INFO L134 CoverageAnalysis]: Checked inductivity of 596 backedges. 573 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-13 13:15:26,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:15:26,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052521473] [2022-07-13 13:15:26,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052521473] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:15:26,904 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:15:26,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 13:15:26,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555557015] [2022-07-13 13:15:26,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:15:26,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 13:15:26,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:15:26,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 13:15:26,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 13:15:26,906 INFO L87 Difference]: Start difference. First operand 61851 states and 67795 transitions. Second operand has 4 states, 4 states have (on average 100.75) internal successors, (403), 4 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:29,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:15:29,914 INFO L93 Difference]: Finished difference Result 145471 states and 159571 transitions. [2022-07-13 13:15:29,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 13:15:29,914 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 100.75) internal successors, (403), 4 states have internal predecessors, (403), 0 states have call successors, (0), 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 425 [2022-07-13 13:15:29,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:15:30,002 INFO L225 Difference]: With dead ends: 145471 [2022-07-13 13:15:30,002 INFO L226 Difference]: Without dead ends: 83622 [2022-07-13 13:15:30,040 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 [2022-07-13 13:15:30,040 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 828 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 2316 mSolverCounterSat, 464 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 828 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 2780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 464 IncrementalHoareTripleChecker+Valid, 2316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-13 13:15:30,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [828 Valid, 207 Invalid, 2780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [464 Valid, 2316 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-07-13 13:15:30,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83622 states. [2022-07-13 13:15:31,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83622 to 78925. [2022-07-13 13:15:31,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78925 states, 78924 states have (on average 1.097967665095535) internal successors, (86656), 78924 states have internal predecessors, (86656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:31,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78925 states to 78925 states and 86656 transitions. [2022-07-13 13:15:31,171 INFO L78 Accepts]: Start accepts. Automaton has 78925 states and 86656 transitions. Word has length 425 [2022-07-13 13:15:31,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:15:31,171 INFO L495 AbstractCegarLoop]: Abstraction has 78925 states and 86656 transitions. [2022-07-13 13:15:31,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 100.75) internal successors, (403), 4 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:31,172 INFO L276 IsEmpty]: Start isEmpty. Operand 78925 states and 86656 transitions. [2022-07-13 13:15:31,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2022-07-13 13:15:31,179 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:15:31,179 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2022-07-13 13:15:31,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-13 13:15:31,179 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:15:31,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:15:31,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1733652073, now seen corresponding path program 1 times [2022-07-13 13:15:31,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:15:31,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445755889] [2022-07-13 13:15:31,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:15:31,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:15:31,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:15:31,332 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 533 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-07-13 13:15:31,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:15:31,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445755889] [2022-07-13 13:15:31,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445755889] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:15:31,333 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:15:31,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:15:31,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610857767] [2022-07-13 13:15:31,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:15:31,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:15:31,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:15:31,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:15:31,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:15:31,334 INFO L87 Difference]: Start difference. First operand 78925 states and 86656 transitions. Second operand has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 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) [2022-07-13 13:15:33,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:15:33,594 INFO L93 Difference]: Finished difference Result 167643 states and 184228 transitions. [2022-07-13 13:15:33,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:15:33,594 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 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 444 [2022-07-13 13:15:33,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:15:33,696 INFO L225 Difference]: With dead ends: 167643 [2022-07-13 13:15:33,697 INFO L226 Difference]: Without dead ends: 88720 [2022-07-13 13:15:33,728 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 [2022-07-13 13:15:33,730 INFO L413 NwaCegarLoop]: 284 mSDtfsCounter, 387 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1221 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 1420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 1221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-13 13:15:33,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [387 Valid, 328 Invalid, 1420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 1221 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-13 13:15:33,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88720 states. [2022-07-13 13:15:34,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88720 to 88286. [2022-07-13 13:15:34,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88286 states, 88285 states have (on average 1.0953389590530667) internal successors, (96702), 88285 states have internal predecessors, (96702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:34,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88286 states to 88286 states and 96702 transitions. [2022-07-13 13:15:34,843 INFO L78 Accepts]: Start accepts. Automaton has 88286 states and 96702 transitions. Word has length 444 [2022-07-13 13:15:34,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:15:34,843 INFO L495 AbstractCegarLoop]: Abstraction has 88286 states and 96702 transitions. [2022-07-13 13:15:34,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 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) [2022-07-13 13:15:34,844 INFO L276 IsEmpty]: Start isEmpty. Operand 88286 states and 96702 transitions. [2022-07-13 13:15:34,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2022-07-13 13:15:34,852 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:15:34,852 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-13 13:15:34,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-13 13:15:34,852 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:15:34,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:15:34,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1451937129, now seen corresponding path program 1 times [2022-07-13 13:15:34,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:15:34,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315991979] [2022-07-13 13:15:34,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:15:34,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:15:34,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:15:35,017 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 510 trivial. 0 not checked. [2022-07-13 13:15:35,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:15:35,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315991979] [2022-07-13 13:15:35,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315991979] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:15:35,017 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:15:35,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:15:35,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852994908] [2022-07-13 13:15:35,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:15:35,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:15:35,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:15:35,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:15:35,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:15:35,018 INFO L87 Difference]: Start difference. First operand 88286 states and 96702 transitions. Second operand has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:37,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:15:37,142 INFO L93 Difference]: Finished difference Result 190190 states and 208577 transitions. [2022-07-13 13:15:37,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:15:37,143 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 0 states have call successors, (0), 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 468 [2022-07-13 13:15:37,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:15:37,281 INFO L225 Difference]: With dead ends: 190190 [2022-07-13 13:15:37,281 INFO L226 Difference]: Without dead ends: 101906 [2022-07-13 13:15:37,341 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 [2022-07-13 13:15:37,344 INFO L413 NwaCegarLoop]: 221 mSDtfsCounter, 475 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 1240 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 1437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 1240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-13 13:15:37,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [475 Valid, 264 Invalid, 1437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 1240 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-13 13:15:37,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101906 states. [2022-07-13 13:15:38,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101906 to 101449. [2022-07-13 13:15:38,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101449 states, 101448 states have (on average 1.0927963094393187) internal successors, (110862), 101448 states have internal predecessors, (110862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:38,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101449 states to 101449 states and 110862 transitions. [2022-07-13 13:15:38,816 INFO L78 Accepts]: Start accepts. Automaton has 101449 states and 110862 transitions. Word has length 468 [2022-07-13 13:15:38,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:15:38,816 INFO L495 AbstractCegarLoop]: Abstraction has 101449 states and 110862 transitions. [2022-07-13 13:15:38,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:38,816 INFO L276 IsEmpty]: Start isEmpty. Operand 101449 states and 110862 transitions. [2022-07-13 13:15:38,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2022-07-13 13:15:38,823 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:15:38,823 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2022-07-13 13:15:38,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-13 13:15:38,824 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:15:38,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:15:38,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1632310757, now seen corresponding path program 1 times [2022-07-13 13:15:38,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:15:38,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067598048] [2022-07-13 13:15:38,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:15:38,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:15:39,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:15:39,290 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-07-13 13:15:39,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:15:39,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067598048] [2022-07-13 13:15:39,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067598048] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:15:39,291 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:15:39,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:15:39,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792847193] [2022-07-13 13:15:39,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:15:39,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:15:39,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:15:39,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:15:39,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:15:39,293 INFO L87 Difference]: Start difference. First operand 101449 states and 110862 transitions. Second operand has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:41,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:15:41,552 INFO L93 Difference]: Finished difference Result 208447 states and 227581 transitions. [2022-07-13 13:15:41,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:15:41,553 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 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 471 [2022-07-13 13:15:41,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:15:41,679 INFO L225 Difference]: With dead ends: 208447 [2022-07-13 13:15:41,680 INFO L226 Difference]: Without dead ends: 105293 [2022-07-13 13:15:41,720 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 [2022-07-13 13:15:41,721 INFO L413 NwaCegarLoop]: 752 mSDtfsCounter, 424 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 1278 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 807 SdHoareTripleChecker+Invalid, 1369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-13 13:15:41,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [424 Valid, 807 Invalid, 1369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1278 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-13 13:15:41,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105293 states. [2022-07-13 13:15:42,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105293 to 102292. [2022-07-13 13:15:42,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102292 states, 102291 states have (on average 1.0912103704138194) internal successors, (111621), 102291 states have internal predecessors, (111621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:43,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102292 states to 102292 states and 111621 transitions. [2022-07-13 13:15:43,343 INFO L78 Accepts]: Start accepts. Automaton has 102292 states and 111621 transitions. Word has length 471 [2022-07-13 13:15:43,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:15:43,344 INFO L495 AbstractCegarLoop]: Abstraction has 102292 states and 111621 transitions. [2022-07-13 13:15:43,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:43,344 INFO L276 IsEmpty]: Start isEmpty. Operand 102292 states and 111621 transitions. [2022-07-13 13:15:43,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 510 [2022-07-13 13:15:43,356 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:15:43,357 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-13 13:15:43,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-13 13:15:43,359 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:15:43,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:15:43,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1828137218, now seen corresponding path program 1 times [2022-07-13 13:15:43,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:15:43,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98755937] [2022-07-13 13:15:43,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:15:43,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:15:43,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:15:43,657 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 559 proven. 29 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-07-13 13:15:43,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:15:43,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98755937] [2022-07-13 13:15:43,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98755937] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 13:15:43,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548228186] [2022-07-13 13:15:43,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:15:43,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 13:15:43,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 13:15:43,659 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) [2022-07-13 13:15:43,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 13:15:43,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:15:43,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 673 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-13 13:15:43,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 13:15:45,731 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 559 proven. 29 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-07-13 13:15:45,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 13:15:47,822 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 559 proven. 29 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-07-13 13:15:47,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548228186] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 13:15:47,823 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 13:15:47,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-07-13 13:15:47,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28202862] [2022-07-13 13:15:47,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 13:15:47,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-13 13:15:47,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:15:47,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-13 13:15:47,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-07-13 13:15:47,826 INFO L87 Difference]: Start difference. First operand 102292 states and 111621 transitions. Second operand has 11 states, 11 states have (on average 77.36363636363636) internal successors, (851), 11 states have internal predecessors, (851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:55,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:15:55,861 INFO L93 Difference]: Finished difference Result 209443 states and 228348 transitions. [2022-07-13 13:15:55,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-13 13:15:55,862 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 77.36363636363636) internal successors, (851), 11 states have internal predecessors, (851), 0 states have call successors, (0), 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 509 [2022-07-13 13:15:55,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:15:56,005 INFO L225 Difference]: With dead ends: 209443 [2022-07-13 13:15:56,005 INFO L226 Difference]: Without dead ends: 107577 [2022-07-13 13:15:56,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1042 GetRequests, 1022 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2022-07-13 13:15:56,067 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 3758 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 10215 mSolverCounterSat, 1028 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3758 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 11243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1028 IncrementalHoareTripleChecker+Valid, 10215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-07-13 13:15:56,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3758 Valid, 305 Invalid, 11243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1028 Valid, 10215 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2022-07-13 13:15:56,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107577 states. [2022-07-13 13:15:57,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107577 to 95896. [2022-07-13 13:15:57,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95896 states, 95895 states have (on average 1.0898586996193753) internal successors, (104512), 95895 states have internal predecessors, (104512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:57,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95896 states to 95896 states and 104512 transitions. [2022-07-13 13:15:57,477 INFO L78 Accepts]: Start accepts. Automaton has 95896 states and 104512 transitions. Word has length 509 [2022-07-13 13:15:57,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:15:57,478 INFO L495 AbstractCegarLoop]: Abstraction has 95896 states and 104512 transitions. [2022-07-13 13:15:57,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 77.36363636363636) internal successors, (851), 11 states have internal predecessors, (851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:57,478 INFO L276 IsEmpty]: Start isEmpty. Operand 95896 states and 104512 transitions. [2022-07-13 13:15:57,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 517 [2022-07-13 13:15:57,486 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:15:57,487 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2022-07-13 13:15:57,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 13:15:57,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 13:15:57,690 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:15:57,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:15:57,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1583845249, now seen corresponding path program 1 times [2022-07-13 13:15:57,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:15:57,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975912354] [2022-07-13 13:15:57,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:15:57,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:15:57,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:15:57,893 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-07-13 13:15:57,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:15:57,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975912354] [2022-07-13 13:15:57,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975912354] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:15:57,894 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:15:57,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:15:57,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242638461] [2022-07-13 13:15:57,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:15:57,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:15:57,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:15:57,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:15:57,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:15:57,897 INFO L87 Difference]: Start difference. First operand 95896 states and 104512 transitions. Second operand has 3 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:16:00,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:16:00,143 INFO L93 Difference]: Finished difference Result 196901 states and 214251 transitions. [2022-07-13 13:16:00,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:16:00,144 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 0 states have call successors, (0), 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 516 [2022-07-13 13:16:00,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:16:00,269 INFO L225 Difference]: With dead ends: 196901 [2022-07-13 13:16:00,269 INFO L226 Difference]: Without dead ends: 100997 [2022-07-13 13:16:00,321 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 [2022-07-13 13:16:00,322 INFO L413 NwaCegarLoop]: 618 mSDtfsCounter, 464 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 1224 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 1437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 1224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-13 13:16:00,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [464 Valid, 649 Invalid, 1437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 1224 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-13 13:16:00,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100997 states. [2022-07-13 13:16:01,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100997 to 97149. [2022-07-13 13:16:01,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97149 states, 97148 states have (on average 1.0779120517149092) internal successors, (104717), 97148 states have internal predecessors, (104717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:16:01,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97149 states to 97149 states and 104717 transitions. [2022-07-13 13:16:01,870 INFO L78 Accepts]: Start accepts. Automaton has 97149 states and 104717 transitions. Word has length 516 [2022-07-13 13:16:01,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:16:01,871 INFO L495 AbstractCegarLoop]: Abstraction has 97149 states and 104717 transitions. [2022-07-13 13:16:01,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:16:01,871 INFO L276 IsEmpty]: Start isEmpty. Operand 97149 states and 104717 transitions. [2022-07-13 13:16:01,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 533 [2022-07-13 13:16:01,884 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:16:01,885 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-13 13:16:01,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-13 13:16:01,885 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:16:01,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:16:01,885 INFO L85 PathProgramCache]: Analyzing trace with hash -998465671, now seen corresponding path program 1 times [2022-07-13 13:16:01,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:16:01,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927777235] [2022-07-13 13:16:01,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:16:01,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:16:02,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:16:02,149 INFO L134 CoverageAnalysis]: Checked inductivity of 744 backedges. 580 proven. 141 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-13 13:16:02,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:16:02,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927777235] [2022-07-13 13:16:02,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927777235] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 13:16:02,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507955900] [2022-07-13 13:16:02,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:16:02,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 13:16:02,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 13:16:02,152 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 13:16:02,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 13:16:02,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:16:02,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 697 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 13:16:02,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 13:16:04,265 INFO L134 CoverageAnalysis]: Checked inductivity of 744 backedges. 639 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-07-13 13:16:04,265 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 13:16:04,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507955900] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:16:04,266 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 13:16:04,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-07-13 13:16:04,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522704829] [2022-07-13 13:16:04,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:16:04,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 13:16:04,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:16:04,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 13:16:04,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 13:16:04,268 INFO L87 Difference]: Start difference. First operand 97149 states and 104717 transitions. Second operand has 4 states, 4 states have (on average 107.25) internal successors, (429), 4 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:16:08,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:16:08,195 INFO L93 Difference]: Finished difference Result 196861 states and 211900 transitions. [2022-07-13 13:16:08,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 13:16:08,195 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 107.25) internal successors, (429), 4 states have internal predecessors, (429), 0 states have call successors, (0), 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 532 [2022-07-13 13:16:08,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:16:08,323 INFO L225 Difference]: With dead ends: 196861 [2022-07-13 13:16:08,323 INFO L226 Difference]: Without dead ends: 100137 [2022-07-13 13:16:08,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 537 GetRequests, 532 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-13 13:16:08,383 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 1237 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 2692 mSolverCounterSat, 441 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1237 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 3133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 441 IncrementalHoareTripleChecker+Valid, 2692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-07-13 13:16:08,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1237 Valid, 164 Invalid, 3133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [441 Valid, 2692 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-07-13 13:16:08,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100137 states. [2022-07-13 13:16:09,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100137 to 95866. [2022-07-13 13:16:09,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95866 states, 95865 states have (on average 1.06495592760653) internal successors, (102092), 95865 states have internal predecessors, (102092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:16:09,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95866 states to 95866 states and 102092 transitions. [2022-07-13 13:16:09,723 INFO L78 Accepts]: Start accepts. Automaton has 95866 states and 102092 transitions. Word has length 532 [2022-07-13 13:16:09,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:16:09,723 INFO L495 AbstractCegarLoop]: Abstraction has 95866 states and 102092 transitions. [2022-07-13 13:16:09,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 107.25) internal successors, (429), 4 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:16:09,724 INFO L276 IsEmpty]: Start isEmpty. Operand 95866 states and 102092 transitions. [2022-07-13 13:16:09,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 533 [2022-07-13 13:16:09,732 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:16:09,733 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-13 13:16:09,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 13:16:09,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 13:16:09,933 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:16:09,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:16:09,934 INFO L85 PathProgramCache]: Analyzing trace with hash -331083781, now seen corresponding path program 1 times [2022-07-13 13:16:09,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:16:09,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036221858] [2022-07-13 13:16:09,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:16:09,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:16:10,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:16:10,148 INFO L134 CoverageAnalysis]: Checked inductivity of 744 backedges. 662 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-13 13:16:10,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:16:10,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036221858] [2022-07-13 13:16:10,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036221858] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:16:10,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:16:10,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 13:16:10,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214877013] [2022-07-13 13:16:10,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:16:10,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 13:16:10,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:16:10,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 13:16:10,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 13:16:10,151 INFO L87 Difference]: Start difference. First operand 95866 states and 102092 transitions. Second operand has 4 states, 4 states have (on average 112.75) internal successors, (451), 4 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:16:12,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:16:12,897 INFO L93 Difference]: Finished difference Result 210504 states and 223949 transitions. [2022-07-13 13:16:12,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 13:16:12,898 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 112.75) internal successors, (451), 4 states have internal predecessors, (451), 0 states have call successors, (0), 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 532 [2022-07-13 13:16:12,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:16:13,027 INFO L225 Difference]: With dead ends: 210504 [2022-07-13 13:16:13,027 INFO L226 Difference]: Without dead ends: 115065 [2022-07-13 13:16:13,080 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 [2022-07-13 13:16:13,081 INFO L413 NwaCegarLoop]: 607 mSDtfsCounter, 691 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 2092 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 691 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 2311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 2092 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-13 13:16:13,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [691 Valid, 663 Invalid, 2311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 2092 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-13 13:16:13,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115065 states. [2022-07-13 13:16:14,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115065 to 96295. [2022-07-13 13:16:14,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96295 states, 96294 states have (on average 1.0628284212931232) internal successors, (102344), 96294 states have internal predecessors, (102344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:16:14,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96295 states to 96295 states and 102344 transitions. [2022-07-13 13:16:14,681 INFO L78 Accepts]: Start accepts. Automaton has 96295 states and 102344 transitions. Word has length 532 [2022-07-13 13:16:14,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:16:14,682 INFO L495 AbstractCegarLoop]: Abstraction has 96295 states and 102344 transitions. [2022-07-13 13:16:14,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 112.75) internal successors, (451), 4 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:16:14,682 INFO L276 IsEmpty]: Start isEmpty. Operand 96295 states and 102344 transitions. [2022-07-13 13:16:14,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 569 [2022-07-13 13:16:14,691 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:16:14,691 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:16:14,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-13 13:16:14,691 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:16:14,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:16:14,692 INFO L85 PathProgramCache]: Analyzing trace with hash -2020144656, now seen corresponding path program 1 times [2022-07-13 13:16:14,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:16:14,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989733416] [2022-07-13 13:16:14,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:16:14,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:16:14,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:16:14,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 875 proven. 0 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-07-13 13:16:14,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:16:14,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989733416] [2022-07-13 13:16:14,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989733416] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:16:14,898 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:16:14,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 13:16:14,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361375290] [2022-07-13 13:16:14,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:16:14,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 13:16:14,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:16:14,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 13:16:14,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 13:16:14,900 INFO L87 Difference]: Start difference. First operand 96295 states and 102344 transitions. Second operand has 4 states, 4 states have (on average 103.5) internal successors, (414), 4 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) [2022-07-13 13:16:17,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:16:17,747 INFO L93 Difference]: Finished difference Result 198549 states and 210930 transitions. [2022-07-13 13:16:17,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 13:16:17,748 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 103.5) internal successors, (414), 4 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 568 [2022-07-13 13:16:17,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:16:17,872 INFO L225 Difference]: With dead ends: 198549 [2022-07-13 13:16:17,872 INFO L226 Difference]: Without dead ends: 102681 [2022-07-13 13:16:17,919 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 [2022-07-13 13:16:17,919 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 717 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 2215 mSolverCounterSat, 336 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 717 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 2551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 336 IncrementalHoareTripleChecker+Valid, 2215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-13 13:16:17,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [717 Valid, 140 Invalid, 2551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [336 Valid, 2215 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-07-13 13:16:17,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102681 states. [2022-07-13 13:16:18,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102681 to 95870. [2022-07-13 13:16:18,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95870 states, 95869 states have (on average 1.0576724488625102) internal successors, (101398), 95869 states have internal predecessors, (101398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:16:19,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95870 states to 95870 states and 101398 transitions. [2022-07-13 13:16:19,061 INFO L78 Accepts]: Start accepts. Automaton has 95870 states and 101398 transitions. Word has length 568 [2022-07-13 13:16:19,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:16:19,061 INFO L495 AbstractCegarLoop]: Abstraction has 95870 states and 101398 transitions. [2022-07-13 13:16:19,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 103.5) internal successors, (414), 4 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) [2022-07-13 13:16:19,061 INFO L276 IsEmpty]: Start isEmpty. Operand 95870 states and 101398 transitions. [2022-07-13 13:16:19,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 623 [2022-07-13 13:16:19,074 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:16:19,074 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:16:19,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-13 13:16:19,074 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:16:19,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:16:19,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1964398361, now seen corresponding path program 1 times [2022-07-13 13:16:19,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:16:19,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843326248] [2022-07-13 13:16:19,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:16:19,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:16:19,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:16:19,674 INFO L134 CoverageAnalysis]: Checked inductivity of 798 backedges. 486 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-07-13 13:16:19,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:16:19,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843326248] [2022-07-13 13:16:19,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843326248] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:16:19,675 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:16:19,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 13:16:19,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160155758] [2022-07-13 13:16:19,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:16:19,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 13:16:19,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:16:19,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 13:16:19,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 13:16:19,678 INFO L87 Difference]: Start difference. First operand 95870 states and 101398 transitions. Second operand has 4 states, 4 states have (on average 98.5) internal successors, (394), 4 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:16:22,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:16:22,728 INFO L93 Difference]: Finished difference Result 203681 states and 215268 transitions. [2022-07-13 13:16:22,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 13:16:22,728 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 98.5) internal successors, (394), 4 states have internal predecessors, (394), 0 states have call successors, (0), 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 622 [2022-07-13 13:16:22,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:16:22,846 INFO L225 Difference]: With dead ends: 203681 [2022-07-13 13:16:22,846 INFO L226 Difference]: Without dead ends: 107813 [2022-07-13 13:16:22,870 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 [2022-07-13 13:16:22,871 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 695 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 2274 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 695 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 2497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 2274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-13 13:16:22,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [695 Valid, 222 Invalid, 2497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 2274 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-13 13:16:22,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107813 states. [2022-07-13 13:16:23,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107813 to 102677. [2022-07-13 13:16:24,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102677 states, 102676 states have (on average 1.0572577817600997) internal successors, (108555), 102676 states have internal predecessors, (108555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:16:24,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102677 states to 102677 states and 108555 transitions. [2022-07-13 13:16:24,142 INFO L78 Accepts]: Start accepts. Automaton has 102677 states and 108555 transitions. Word has length 622 [2022-07-13 13:16:24,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:16:24,142 INFO L495 AbstractCegarLoop]: Abstraction has 102677 states and 108555 transitions. [2022-07-13 13:16:24,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 98.5) internal successors, (394), 4 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:16:24,143 INFO L276 IsEmpty]: Start isEmpty. Operand 102677 states and 108555 transitions. [2022-07-13 13:16:24,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 649 [2022-07-13 13:16:24,161 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:16:24,162 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:16:24,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-13 13:16:24,162 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:16:24,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:16:24,163 INFO L85 PathProgramCache]: Analyzing trace with hash 217031882, now seen corresponding path program 1 times [2022-07-13 13:16:24,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:16:24,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392865000] [2022-07-13 13:16:24,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:16:24,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:16:24,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:16:24,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 530 proven. 23 refuted. 0 times theorem prover too weak. 527 trivial. 0 not checked. [2022-07-13 13:16:24,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:16:24,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392865000] [2022-07-13 13:16:24,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392865000] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 13:16:24,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991514040] [2022-07-13 13:16:24,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:16:24,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 13:16:24,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 13:16:24,441 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 13:16:24,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 13:16:24,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:16:24,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 833 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-13 13:16:24,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 13:16:26,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 530 proven. 23 refuted. 0 times theorem prover too weak. 527 trivial. 0 not checked. [2022-07-13 13:16:26,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 13:16:26,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 553 proven. 0 refuted. 0 times theorem prover too weak. 527 trivial. 0 not checked. [2022-07-13 13:16:26,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991514040] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-13 13:16:26,917 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-13 13:16:26,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 8 [2022-07-13 13:16:26,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916565114] [2022-07-13 13:16:26,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:16:26,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 13:16:26,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:16:26,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 13:16:26,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-07-13 13:16:26,919 INFO L87 Difference]: Start difference. First operand 102677 states and 108555 transitions. Second operand has 4 states, 4 states have (on average 92.25) internal successors, (369), 4 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)