./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/Problem05_label45+token_ring.03.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/Problem05_label45+token_ring.03.cil-1.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 7ec37a095871269c822e7d35e6d840f2de134a68f657807281a5c0e96980df26 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 19:23:10,278 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 19:23:10,280 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 19:23:10,309 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 19:23:10,309 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 19:23:10,310 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 19:23:10,311 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 19:23:10,326 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 19:23:10,328 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 19:23:10,329 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 19:23:10,329 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 19:23:10,330 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 19:23:10,331 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 19:23:10,331 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 19:23:10,347 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 19:23:10,349 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 19:23:10,349 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 19:23:10,350 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 19:23:10,351 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 19:23:10,352 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 19:23:10,353 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 19:23:10,354 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 19:23:10,354 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 19:23:10,355 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 19:23:10,355 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 19:23:10,357 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 19:23:10,357 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 19:23:10,357 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 19:23:10,358 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 19:23:10,358 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 19:23:10,359 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 19:23:10,359 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 19:23:10,360 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 19:23:10,360 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 19:23:10,361 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 19:23:10,361 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 19:23:10,361 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 19:23:10,362 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 19:23:10,362 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 19:23:10,362 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 19:23:10,363 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 19:23:10,363 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 19:23:10,364 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 19:23:10,377 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 19:23:10,377 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 19:23:10,378 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 19:23:10,378 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 19:23:10,378 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 19:23:10,378 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 19:23:10,379 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 19:23:10,379 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 19:23:10,379 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 19:23:10,379 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 19:23:10,380 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 19:23:10,380 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 19:23:10,380 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 19:23:10,380 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 19:23:10,380 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 19:23:10,380 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 19:23:10,381 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 19:23:10,381 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 19:23:10,381 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 19:23:10,381 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 19:23:10,381 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 19:23:10,382 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 19:23:10,382 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 19:23:10,382 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 19:23:10,382 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 19:23:10,382 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 19:23:10,383 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 19:23:10,383 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 19:23:10,383 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 19:23:10,383 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 19:23:10,383 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 19:23:10,383 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 19:23:10,384 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 19:23:10,384 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7ec37a095871269c822e7d35e6d840f2de134a68f657807281a5c0e96980df26 [2022-07-19 19:23:10,533 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 19:23:10,546 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 19:23:10,547 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 19:23:10,548 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 19:23:10,548 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 19:23:10,549 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/Problem05_label45+token_ring.03.cil-1.c [2022-07-19 19:23:10,583 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2542c2d07/2289565d0ed54f0b9ddbfcf9903f463e/FLAGb5516b5c0 [2022-07-19 19:23:11,253 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 19:23:11,253 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/Problem05_label45+token_ring.03.cil-1.c [2022-07-19 19:23:11,296 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2542c2d07/2289565d0ed54f0b9ddbfcf9903f463e/FLAGb5516b5c0 [2022-07-19 19:23:11,345 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2542c2d07/2289565d0ed54f0b9ddbfcf9903f463e [2022-07-19 19:23:11,347 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 19:23:11,349 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 19:23:11,350 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 19:23:11,351 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 19:23:11,353 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 19:23:11,353 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 07:23:11" (1/1) ... [2022-07-19 19:23:11,354 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f0d52fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 07:23:11, skipping insertion in model container [2022-07-19 19:23:11,354 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 07:23:11" (1/1) ... [2022-07-19 19:23:11,358 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 19:23:11,484 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 19:23:12,688 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/combinations/Problem05_label45+token_ring.03.cil-1.c[380323,380336] [2022-07-19 19:23:12,718 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/combinations/Problem05_label45+token_ring.03.cil-1.c[383339,383352] [2022-07-19 19:23:12,863 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 19:23:12,873 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 19:23:13,435 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/combinations/Problem05_label45+token_ring.03.cil-1.c[380323,380336] [2022-07-19 19:23:13,439 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/combinations/Problem05_label45+token_ring.03.cil-1.c[383339,383352] [2022-07-19 19:23:13,455 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 19:23:13,495 INFO L208 MainTranslator]: Completed translation [2022-07-19 19:23:13,495 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 07:23:13 WrapperNode [2022-07-19 19:23:13,495 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 19:23:13,496 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 19:23:13,496 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 19:23:13,497 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 19:23:13,501 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 07:23:13" (1/1) ... [2022-07-19 19:23:13,569 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 07:23:13" (1/1) ... [2022-07-19 19:23:13,919 INFO L137 Inliner]: procedures = 50, calls = 51, calls flagged for inlining = 27, calls inlined = 27, statements flattened = 12682 [2022-07-19 19:23:13,920 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 19:23:13,920 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 19:23:13,920 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 19:23:13,921 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 19:23:13,926 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 07:23:13" (1/1) ... [2022-07-19 19:23:13,927 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 07:23:13" (1/1) ... [2022-07-19 19:23:13,972 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 07:23:13" (1/1) ... [2022-07-19 19:23:13,973 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 07:23:13" (1/1) ... [2022-07-19 19:23:14,190 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 07:23:13" (1/1) ... [2022-07-19 19:23:14,257 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 07:23:13" (1/1) ... [2022-07-19 19:23:14,274 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 07:23:13" (1/1) ... [2022-07-19 19:23:14,334 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 19:23:14,335 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 19:23:14,336 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 19:23:14,336 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 19:23:14,338 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 07:23:13" (1/1) ... [2022-07-19 19:23:14,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 19:23:14,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 19:23:14,391 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-19 19:23:14,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-19 19:23:14,426 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 19:23:14,426 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-07-19 19:23:14,426 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-07-19 19:23:14,426 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-07-19 19:23:14,426 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-07-19 19:23:14,427 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-07-19 19:23:14,427 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-07-19 19:23:14,427 INFO L130 BoogieDeclarations]: Found specification of procedure error [2022-07-19 19:23:14,427 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2022-07-19 19:23:14,427 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-07-19 19:23:14,427 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-07-19 19:23:14,427 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-07-19 19:23:14,427 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-07-19 19:23:14,428 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-07-19 19:23:14,428 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-07-19 19:23:14,428 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 19:23:14,428 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 19:23:14,428 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 19:23:14,517 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 19:23:14,518 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 19:23:19,031 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 19:23:19,054 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 19:23:19,054 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2022-07-19 19:23:19,059 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 07:23:19 BoogieIcfgContainer [2022-07-19 19:23:19,059 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 19:23:19,062 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 19:23:19,062 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 19:23:19,064 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 19:23:19,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 07:23:11" (1/3) ... [2022-07-19 19:23:19,065 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1519b4f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 07:23:19, skipping insertion in model container [2022-07-19 19:23:19,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 07:23:13" (2/3) ... [2022-07-19 19:23:19,066 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1519b4f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 07:23:19, skipping insertion in model container [2022-07-19 19:23:19,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 07:23:19" (3/3) ... [2022-07-19 19:23:19,067 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label45+token_ring.03.cil-1.c [2022-07-19 19:23:19,076 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 19:23:19,076 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-19 19:23:19,147 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 19:23:19,154 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@6ad417ed, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6ac08e3f [2022-07-19 19:23:19,155 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 19:23:19,163 INFO L276 IsEmpty]: Start isEmpty. Operand has 2348 states, 2319 states have (on average 1.8559724018973696) internal successors, (4304), 2324 states have internal predecessors, (4304), 19 states have call successors, (19), 7 states have call predecessors, (19), 7 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-07-19 19:23:19,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-19 19:23:19,172 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 19:23:19,172 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 19:23:19,172 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 19:23:19,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 19:23:19,176 INFO L85 PathProgramCache]: Analyzing trace with hash 520182233, now seen corresponding path program 1 times [2022-07-19 19:23:19,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 19:23:19,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915065885] [2022-07-19 19:23:19,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 19:23:19,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 19:23:19,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:19,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 19:23:19,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:19,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 19:23:19,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:19,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-19 19:23:19,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:19,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-19 19:23:19,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:19,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-19 19:23:19,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:19,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 19:23:19,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 19:23:19,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915065885] [2022-07-19 19:23:19,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915065885] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 19:23:19,374 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 19:23:19,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 19:23:19,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621190390] [2022-07-19 19:23:19,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 19:23:19,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 19:23:19,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 19:23:19,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 19:23:19,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-19 19:23:19,402 INFO L87 Difference]: Start difference. First operand has 2348 states, 2319 states have (on average 1.8559724018973696) internal successors, (4304), 2324 states have internal predecessors, (4304), 19 states have call successors, (19), 7 states have call predecessors, (19), 7 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 19:23:20,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 19:23:20,271 INFO L93 Difference]: Finished difference Result 4921 states and 9054 transitions. [2022-07-19 19:23:20,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 19:23:20,274 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 80 [2022-07-19 19:23:20,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 19:23:20,290 INFO L225 Difference]: With dead ends: 4921 [2022-07-19 19:23:20,291 INFO L226 Difference]: Without dead ends: 2514 [2022-07-19 19:23:20,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-07-19 19:23:20,299 INFO L413 NwaCegarLoop]: 4299 mSDtfsCounter, 4559 mSDsluCounter, 12506 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4569 SdHoareTripleChecker+Valid, 16805 SdHoareTripleChecker+Invalid, 794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 19:23:20,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4569 Valid, 16805 Invalid, 794 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [88 Valid, 706 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-19 19:23:20,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2022-07-19 19:23:20,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 2427. [2022-07-19 19:23:20,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2427 states, 2381 states have (on average 1.8299034019319613) internal successors, (4357), 2385 states have internal predecessors, (4357), 31 states have call successors, (31), 13 states have call predecessors, (31), 13 states have return successors, (32), 29 states have call predecessors, (32), 29 states have call successors, (32) [2022-07-19 19:23:20,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2427 states to 2427 states and 4420 transitions. [2022-07-19 19:23:20,386 INFO L78 Accepts]: Start accepts. Automaton has 2427 states and 4420 transitions. Word has length 80 [2022-07-19 19:23:20,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 19:23:20,386 INFO L495 AbstractCegarLoop]: Abstraction has 2427 states and 4420 transitions. [2022-07-19 19:23:20,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 19:23:20,387 INFO L276 IsEmpty]: Start isEmpty. Operand 2427 states and 4420 transitions. [2022-07-19 19:23:20,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-19 19:23:20,390 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 19:23:20,390 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 19:23:20,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 19:23:20,390 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 19:23:20,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 19:23:20,391 INFO L85 PathProgramCache]: Analyzing trace with hash -721258283, now seen corresponding path program 1 times [2022-07-19 19:23:20,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 19:23:20,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322415799] [2022-07-19 19:23:20,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 19:23:20,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 19:23:20,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:20,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 19:23:20,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:20,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 19:23:20,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:20,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-19 19:23:20,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:20,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-19 19:23:20,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:20,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-19 19:23:20,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:20,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 19:23:20,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 19:23:20,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322415799] [2022-07-19 19:23:20,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322415799] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 19:23:20,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 19:23:20,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 19:23:20,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486788539] [2022-07-19 19:23:20,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 19:23:20,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 19:23:20,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 19:23:20,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 19:23:20,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 19:23:20,482 INFO L87 Difference]: Start difference. First operand 2427 states and 4420 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 19:23:21,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 19:23:21,360 INFO L93 Difference]: Finished difference Result 3000 states and 5300 transitions. [2022-07-19 19:23:21,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 19:23:21,361 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 80 [2022-07-19 19:23:21,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 19:23:21,372 INFO L225 Difference]: With dead ends: 3000 [2022-07-19 19:23:21,373 INFO L226 Difference]: Without dead ends: 2705 [2022-07-19 19:23:21,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-19 19:23:21,377 INFO L413 NwaCegarLoop]: 4344 mSDtfsCounter, 4483 mSDsluCounter, 16638 mSDsCounter, 0 mSdLazyCounter, 1103 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4493 SdHoareTripleChecker+Valid, 20982 SdHoareTripleChecker+Invalid, 1164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 19:23:21,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4493 Valid, 20982 Invalid, 1164 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [61 Valid, 1103 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-19 19:23:21,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2705 states. [2022-07-19 19:23:21,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2705 to 2565. [2022-07-19 19:23:21,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2565 states, 2500 states have (on average 1.8144) internal successors, (4536), 2505 states have internal predecessors, (4536), 43 states have call successors, (43), 19 states have call predecessors, (43), 20 states have return successors, (46), 42 states have call predecessors, (46), 41 states have call successors, (46) [2022-07-19 19:23:21,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2565 states to 2565 states and 4625 transitions. [2022-07-19 19:23:21,431 INFO L78 Accepts]: Start accepts. Automaton has 2565 states and 4625 transitions. Word has length 80 [2022-07-19 19:23:21,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 19:23:21,431 INFO L495 AbstractCegarLoop]: Abstraction has 2565 states and 4625 transitions. [2022-07-19 19:23:21,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 19:23:21,432 INFO L276 IsEmpty]: Start isEmpty. Operand 2565 states and 4625 transitions. [2022-07-19 19:23:21,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-19 19:23:21,434 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 19:23:21,434 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 19:23:21,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 19:23:21,434 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 19:23:21,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 19:23:21,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1887529175, now seen corresponding path program 1 times [2022-07-19 19:23:21,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 19:23:21,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927992138] [2022-07-19 19:23:21,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 19:23:21,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 19:23:21,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:21,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 19:23:21,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:21,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 19:23:21,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:21,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-19 19:23:21,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:21,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-19 19:23:21,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:21,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-19 19:23:21,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:21,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 19:23:21,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 19:23:21,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927992138] [2022-07-19 19:23:21,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927992138] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 19:23:21,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 19:23:21,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 19:23:21,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151582866] [2022-07-19 19:23:21,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 19:23:21,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 19:23:21,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 19:23:21,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 19:23:21,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 19:23:21,513 INFO L87 Difference]: Start difference. First operand 2565 states and 4625 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 19:23:22,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 19:23:22,564 INFO L93 Difference]: Finished difference Result 3497 states and 6053 transitions. [2022-07-19 19:23:22,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 19:23:22,564 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 80 [2022-07-19 19:23:22,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 19:23:22,575 INFO L225 Difference]: With dead ends: 3497 [2022-07-19 19:23:22,575 INFO L226 Difference]: Without dead ends: 3064 [2022-07-19 19:23:22,578 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-19 19:23:22,579 INFO L413 NwaCegarLoop]: 4336 mSDtfsCounter, 4480 mSDsluCounter, 16638 mSDsCounter, 0 mSdLazyCounter, 1105 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4490 SdHoareTripleChecker+Valid, 20974 SdHoareTripleChecker+Invalid, 1169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-19 19:23:22,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4490 Valid, 20974 Invalid, 1169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1105 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-19 19:23:22,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3064 states. [2022-07-19 19:23:22,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3064 to 2842. [2022-07-19 19:23:22,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2842 states, 2739 states have (on average 1.78714859437751) internal successors, (4895), 2746 states have internal predecessors, (4895), 67 states have call successors, (67), 31 states have call predecessors, (67), 34 states have return successors, (78), 68 states have call predecessors, (78), 65 states have call successors, (78) [2022-07-19 19:23:22,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2842 states to 2842 states and 5040 transitions. [2022-07-19 19:23:22,628 INFO L78 Accepts]: Start accepts. Automaton has 2842 states and 5040 transitions. Word has length 80 [2022-07-19 19:23:22,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 19:23:22,629 INFO L495 AbstractCegarLoop]: Abstraction has 2842 states and 5040 transitions. [2022-07-19 19:23:22,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 19:23:22,629 INFO L276 IsEmpty]: Start isEmpty. Operand 2842 states and 5040 transitions. [2022-07-19 19:23:22,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-19 19:23:22,630 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 19:23:22,630 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 19:23:22,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 19:23:22,631 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 19:23:22,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 19:23:22,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1833136277, now seen corresponding path program 1 times [2022-07-19 19:23:22,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 19:23:22,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726322833] [2022-07-19 19:23:22,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 19:23:22,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 19:23:22,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:22,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 19:23:22,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:22,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 19:23:22,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:22,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-19 19:23:22,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:22,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-19 19:23:22,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:22,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-19 19:23:22,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:22,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 19:23:22,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 19:23:22,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726322833] [2022-07-19 19:23:22,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726322833] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 19:23:22,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 19:23:22,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 19:23:22,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117531593] [2022-07-19 19:23:22,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 19:23:22,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 19:23:22,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 19:23:22,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 19:23:22,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 19:23:22,692 INFO L87 Difference]: Start difference. First operand 2842 states and 5040 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 19:23:23,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 19:23:23,516 INFO L93 Difference]: Finished difference Result 4458 states and 7508 transitions. [2022-07-19 19:23:23,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 19:23:23,517 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 80 [2022-07-19 19:23:23,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 19:23:23,529 INFO L225 Difference]: With dead ends: 4458 [2022-07-19 19:23:23,530 INFO L226 Difference]: Without dead ends: 3748 [2022-07-19 19:23:23,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-19 19:23:23,534 INFO L413 NwaCegarLoop]: 4332 mSDtfsCounter, 4476 mSDsluCounter, 16638 mSDsCounter, 0 mSdLazyCounter, 1100 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4486 SdHoareTripleChecker+Valid, 20970 SdHoareTripleChecker+Invalid, 1164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 19:23:23,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4486 Valid, 20970 Invalid, 1164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1100 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-19 19:23:23,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3748 states. [2022-07-19 19:23:23,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3748 to 3397. [2022-07-19 19:23:23,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3397 states, 3218 states have (on average 1.7442510876320696) internal successors, (5613), 3229 states have internal predecessors, (5613), 115 states have call successors, (115), 55 states have call predecessors, (115), 62 states have return successors, (148), 120 states have call predecessors, (148), 113 states have call successors, (148) [2022-07-19 19:23:23,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3397 states to 3397 states and 5876 transitions. [2022-07-19 19:23:23,607 INFO L78 Accepts]: Start accepts. Automaton has 3397 states and 5876 transitions. Word has length 80 [2022-07-19 19:23:23,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 19:23:23,608 INFO L495 AbstractCegarLoop]: Abstraction has 3397 states and 5876 transitions. [2022-07-19 19:23:23,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 19:23:23,608 INFO L276 IsEmpty]: Start isEmpty. Operand 3397 states and 5876 transitions. [2022-07-19 19:23:23,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-19 19:23:23,610 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 19:23:23,610 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 19:23:23,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 19:23:23,610 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 19:23:23,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 19:23:23,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1415739671, now seen corresponding path program 1 times [2022-07-19 19:23:23,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 19:23:23,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300921840] [2022-07-19 19:23:23,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 19:23:23,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 19:23:23,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:23,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 19:23:23,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:23,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 19:23:23,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:23,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-19 19:23:23,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:23,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-19 19:23:23,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:23,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-19 19:23:23,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:23,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 19:23:23,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 19:23:23,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300921840] [2022-07-19 19:23:23,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300921840] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 19:23:23,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 19:23:23,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 19:23:23,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176813413] [2022-07-19 19:23:23,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 19:23:23,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 19:23:23,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 19:23:23,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 19:23:23,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 19:23:23,672 INFO L87 Difference]: Start difference. First operand 3397 states and 5876 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 19:23:24,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 19:23:24,569 INFO L93 Difference]: Finished difference Result 6787 states and 11028 transitions. [2022-07-19 19:23:24,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-19 19:23:24,570 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 80 [2022-07-19 19:23:24,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 19:23:24,588 INFO L225 Difference]: With dead ends: 6787 [2022-07-19 19:23:24,588 INFO L226 Difference]: Without dead ends: 5522 [2022-07-19 19:23:24,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-07-19 19:23:24,593 INFO L413 NwaCegarLoop]: 4326 mSDtfsCounter, 4607 mSDsluCounter, 16630 mSDsCounter, 0 mSdLazyCounter, 1088 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4621 SdHoareTripleChecker+Valid, 20956 SdHoareTripleChecker+Invalid, 1157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1088 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 19:23:24,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4621 Valid, 20956 Invalid, 1157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1088 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-19 19:23:24,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5522 states. [2022-07-19 19:23:24,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5522 to 4488. [2022-07-19 19:23:24,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4488 states, 4165 states have (on average 1.6900360144057622) internal successors, (7039), 4184 states have internal predecessors, (7039), 203 states have call successors, (203), 103 states have call predecessors, (203), 118 states have return successors, (298), 216 states have call predecessors, (298), 201 states have call successors, (298) [2022-07-19 19:23:24,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4488 states to 4488 states and 7540 transitions. [2022-07-19 19:23:24,699 INFO L78 Accepts]: Start accepts. Automaton has 4488 states and 7540 transitions. Word has length 80 [2022-07-19 19:23:24,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 19:23:24,699 INFO L495 AbstractCegarLoop]: Abstraction has 4488 states and 7540 transitions. [2022-07-19 19:23:24,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 19:23:24,700 INFO L276 IsEmpty]: Start isEmpty. Operand 4488 states and 7540 transitions. [2022-07-19 19:23:24,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-19 19:23:24,702 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 19:23:24,702 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 19:23:24,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 19:23:24,702 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 19:23:24,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 19:23:24,703 INFO L85 PathProgramCache]: Analyzing trace with hash 2095011925, now seen corresponding path program 1 times [2022-07-19 19:23:24,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 19:23:24,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165688978] [2022-07-19 19:23:24,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 19:23:24,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 19:23:24,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:24,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 19:23:24,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:24,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 19:23:24,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:24,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-19 19:23:24,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:24,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-19 19:23:24,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:24,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-19 19:23:24,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:24,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 19:23:24,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 19:23:24,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165688978] [2022-07-19 19:23:24,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165688978] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 19:23:24,755 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 19:23:24,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 19:23:24,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432537178] [2022-07-19 19:23:24,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 19:23:24,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 19:23:24,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 19:23:24,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 19:23:24,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 19:23:24,757 INFO L87 Difference]: Start difference. First operand 4488 states and 7540 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 19:23:25,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 19:23:25,842 INFO L93 Difference]: Finished difference Result 10772 states and 17130 transitions. [2022-07-19 19:23:25,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-19 19:23:25,843 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 80 [2022-07-19 19:23:25,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 19:23:25,876 INFO L225 Difference]: With dead ends: 10772 [2022-07-19 19:23:25,876 INFO L226 Difference]: Without dead ends: 8416 [2022-07-19 19:23:25,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-07-19 19:23:25,886 INFO L413 NwaCegarLoop]: 4363 mSDtfsCounter, 4493 mSDsluCounter, 16627 mSDsCounter, 0 mSdLazyCounter, 1223 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4502 SdHoareTripleChecker+Valid, 20990 SdHoareTripleChecker+Invalid, 1292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-19 19:23:25,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4502 Valid, 20990 Invalid, 1292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1223 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-19 19:23:25,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8416 states. [2022-07-19 19:23:26,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8416 to 6499. [2022-07-19 19:23:26,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6499 states, 5896 states have (on average 1.6290705563093624) internal successors, (9605), 5931 states have internal predecessors, (9605), 371 states have call successors, (371), 199 states have call predecessors, (371), 230 states have return successors, (644), 400 states have call predecessors, (644), 369 states have call successors, (644) [2022-07-19 19:23:26,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6499 states to 6499 states and 10620 transitions. [2022-07-19 19:23:26,084 INFO L78 Accepts]: Start accepts. Automaton has 6499 states and 10620 transitions. Word has length 80 [2022-07-19 19:23:26,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 19:23:26,084 INFO L495 AbstractCegarLoop]: Abstraction has 6499 states and 10620 transitions. [2022-07-19 19:23:26,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 19:23:26,085 INFO L276 IsEmpty]: Start isEmpty. Operand 6499 states and 10620 transitions. [2022-07-19 19:23:26,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-19 19:23:26,088 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 19:23:26,088 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 19:23:26,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 19:23:26,089 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 19:23:26,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 19:23:26,089 INFO L85 PathProgramCache]: Analyzing trace with hash -238380713, now seen corresponding path program 1 times [2022-07-19 19:23:26,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 19:23:26,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922880166] [2022-07-19 19:23:26,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 19:23:26,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 19:23:26,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:26,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 19:23:26,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:26,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 19:23:26,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:26,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-19 19:23:26,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:26,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-19 19:23:26,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:26,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-19 19:23:26,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:26,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 19:23:26,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 19:23:26,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922880166] [2022-07-19 19:23:26,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922880166] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 19:23:26,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 19:23:26,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 19:23:26,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711882502] [2022-07-19 19:23:26,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 19:23:26,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 19:23:26,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 19:23:26,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 19:23:26,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 19:23:26,169 INFO L87 Difference]: Start difference. First operand 6499 states and 10620 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 19:23:27,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 19:23:27,233 INFO L93 Difference]: Finished difference Result 17486 states and 27496 transitions. [2022-07-19 19:23:27,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-19 19:23:27,234 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 80 [2022-07-19 19:23:27,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 19:23:27,267 INFO L225 Difference]: With dead ends: 17486 [2022-07-19 19:23:27,268 INFO L226 Difference]: Without dead ends: 13119 [2022-07-19 19:23:27,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-07-19 19:23:27,280 INFO L413 NwaCegarLoop]: 4313 mSDtfsCounter, 4484 mSDsluCounter, 16630 mSDsCounter, 0 mSdLazyCounter, 1057 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4498 SdHoareTripleChecker+Valid, 20943 SdHoareTripleChecker+Invalid, 1128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1057 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 19:23:27,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4498 Valid, 20943 Invalid, 1128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1057 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-19 19:23:27,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13119 states. [2022-07-19 19:23:27,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13119 to 10695. [2022-07-19 19:23:27,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10695 states, 9548 states have (on average 1.581587767071638) internal successors, (15101), 9615 states have internal predecessors, (15101), 691 states have call successors, (691), 391 states have call predecessors, (691), 454 states have return successors, (1482), 752 states have call predecessors, (1482), 689 states have call successors, (1482) [2022-07-19 19:23:27,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10695 states to 10695 states and 17274 transitions. [2022-07-19 19:23:27,586 INFO L78 Accepts]: Start accepts. Automaton has 10695 states and 17274 transitions. Word has length 80 [2022-07-19 19:23:27,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 19:23:27,588 INFO L495 AbstractCegarLoop]: Abstraction has 10695 states and 17274 transitions. [2022-07-19 19:23:27,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 19:23:27,589 INFO L276 IsEmpty]: Start isEmpty. Operand 10695 states and 17274 transitions. [2022-07-19 19:23:27,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-19 19:23:27,595 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 19:23:27,595 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 19:23:27,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 19:23:27,598 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 19:23:27,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 19:23:27,598 INFO L85 PathProgramCache]: Analyzing trace with hash 322319065, now seen corresponding path program 1 times [2022-07-19 19:23:27,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 19:23:27,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544389113] [2022-07-19 19:23:27,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 19:23:27,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 19:23:27,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:27,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 19:23:27,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:27,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 19:23:27,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:27,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-19 19:23:27,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:27,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-19 19:23:27,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:27,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-19 19:23:27,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:27,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 19:23:27,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 19:23:27,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544389113] [2022-07-19 19:23:27,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544389113] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 19:23:27,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 19:23:27,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 19:23:27,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61623336] [2022-07-19 19:23:27,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 19:23:27,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 19:23:27,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 19:23:27,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 19:23:27,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-19 19:23:27,672 INFO L87 Difference]: Start difference. First operand 10695 states and 17274 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 19:23:28,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 19:23:28,919 INFO L93 Difference]: Finished difference Result 26313 states and 41362 transitions. [2022-07-19 19:23:28,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 19:23:28,920 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 80 [2022-07-19 19:23:28,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 19:23:28,969 INFO L225 Difference]: With dead ends: 26313 [2022-07-19 19:23:28,969 INFO L226 Difference]: Without dead ends: 17751 [2022-07-19 19:23:28,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-07-19 19:23:28,999 INFO L413 NwaCegarLoop]: 4400 mSDtfsCounter, 4644 mSDsluCounter, 12355 mSDsCounter, 0 mSdLazyCounter, 838 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4671 SdHoareTripleChecker+Valid, 16755 SdHoareTripleChecker+Invalid, 931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 19:23:29,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4671 Valid, 16755 Invalid, 931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 838 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-19 19:23:29,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17751 states. [2022-07-19 19:23:29,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17751 to 14888. [2022-07-19 19:23:29,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14888 states, 13146 states have (on average 1.5442720219078045) internal successors, (20301), 13278 states have internal predecessors, (20301), 1056 states have call successors, (1056), 589 states have call predecessors, (1056), 684 states have return successors, (2091), 1084 states have call predecessors, (2091), 1054 states have call successors, (2091) [2022-07-19 19:23:29,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14888 states to 14888 states and 23448 transitions. [2022-07-19 19:23:29,728 INFO L78 Accepts]: Start accepts. Automaton has 14888 states and 23448 transitions. Word has length 80 [2022-07-19 19:23:29,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 19:23:29,728 INFO L495 AbstractCegarLoop]: Abstraction has 14888 states and 23448 transitions. [2022-07-19 19:23:29,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 19:23:29,729 INFO L276 IsEmpty]: Start isEmpty. Operand 14888 states and 23448 transitions. [2022-07-19 19:23:29,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-07-19 19:23:29,756 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 19:23:29,756 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 19:23:29,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-19 19:23:29,757 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 19:23:29,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 19:23:29,757 INFO L85 PathProgramCache]: Analyzing trace with hash 2072406432, now seen corresponding path program 1 times [2022-07-19 19:23:29,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 19:23:29,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964494751] [2022-07-19 19:23:29,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 19:23:29,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 19:23:29,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:29,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 19:23:29,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:29,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 19:23:29,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:29,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-19 19:23:29,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:29,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-19 19:23:29,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:29,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-19 19:23:29,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:29,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-07-19 19:23:29,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:29,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-19 19:23:29,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:29,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-19 19:23:29,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:29,864 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-19 19:23:29,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 19:23:29,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964494751] [2022-07-19 19:23:29,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964494751] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 19:23:29,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410455563] [2022-07-19 19:23:29,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 19:23:29,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 19:23:29,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 19:23:29,866 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 19:23:29,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 19:23:29,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:29,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 19:23:29,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 19:23:30,050 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-19 19:23:30,050 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 19:23:30,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410455563] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 19:23:30,050 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 19:23:30,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2022-07-19 19:23:30,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073955451] [2022-07-19 19:23:30,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 19:23:30,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 19:23:30,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 19:23:30,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 19:23:30,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 19:23:30,052 INFO L87 Difference]: Start difference. First operand 14888 states and 23448 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-19 19:23:30,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 19:23:30,650 INFO L93 Difference]: Finished difference Result 40051 states and 62244 transitions. [2022-07-19 19:23:30,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 19:23:30,650 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), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 129 [2022-07-19 19:23:30,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 19:23:30,727 INFO L225 Difference]: With dead ends: 40051 [2022-07-19 19:23:30,727 INFO L226 Difference]: Without dead ends: 27296 [2022-07-19 19:23:30,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 19:23:30,766 INFO L413 NwaCegarLoop]: 4204 mSDtfsCounter, 4148 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4148 SdHoareTripleChecker+Valid, 4414 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 19:23:30,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4148 Valid, 4414 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 19:23:30,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27296 states. [2022-07-19 19:23:31,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27296 to 27096. [2022-07-19 19:23:31,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27096 states, 23670 states have (on average 1.514321926489227) internal successors, (35844), 23931 states have internal predecessors, (35844), 2056 states have call successors, (2056), 1177 states have call predecessors, (2056), 1368 states have return successors, (4065), 2051 states have call predecessors, (4065), 2054 states have call successors, (4065) [2022-07-19 19:23:31,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27096 states to 27096 states and 41965 transitions. [2022-07-19 19:23:31,759 INFO L78 Accepts]: Start accepts. Automaton has 27096 states and 41965 transitions. Word has length 129 [2022-07-19 19:23:31,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 19:23:31,760 INFO L495 AbstractCegarLoop]: Abstraction has 27096 states and 41965 transitions. [2022-07-19 19:23:31,760 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), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-19 19:23:31,760 INFO L276 IsEmpty]: Start isEmpty. Operand 27096 states and 41965 transitions. [2022-07-19 19:23:31,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-07-19 19:23:31,942 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 19:23:31,943 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 19:23:31,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 19:23:32,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 19:23:32,160 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 19:23:32,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 19:23:32,160 INFO L85 PathProgramCache]: Analyzing trace with hash -853257536, now seen corresponding path program 1 times [2022-07-19 19:23:32,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 19:23:32,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519025526] [2022-07-19 19:23:32,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 19:23:32,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 19:23:32,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:32,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 19:23:32,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:32,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 19:23:32,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:32,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-19 19:23:32,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:32,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-19 19:23:32,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:32,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-19 19:23:32,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:32,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-07-19 19:23:32,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:32,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-19 19:23:32,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:32,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-19 19:23:32,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:32,251 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-19 19:23:32,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 19:23:32,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519025526] [2022-07-19 19:23:32,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519025526] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 19:23:32,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514367451] [2022-07-19 19:23:32,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 19:23:32,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 19:23:32,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 19:23:32,268 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 19:23:32,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 19:23:32,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:32,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 19:23:32,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 19:23:32,424 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-19 19:23:32,424 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 19:23:32,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514367451] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 19:23:32,425 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 19:23:32,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2022-07-19 19:23:32,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087251120] [2022-07-19 19:23:32,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 19:23:32,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 19:23:32,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 19:23:32,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 19:23:32,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 19:23:32,426 INFO L87 Difference]: Start difference. First operand 27096 states and 41965 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-19 19:23:33,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 19:23:33,885 INFO L93 Difference]: Finished difference Result 76329 states and 117663 transitions. [2022-07-19 19:23:33,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 19:23:33,885 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 129 [2022-07-19 19:23:33,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 19:23:34,065 INFO L225 Difference]: With dead ends: 76329 [2022-07-19 19:23:34,065 INFO L226 Difference]: Without dead ends: 51366 [2022-07-19 19:23:34,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 19:23:34,125 INFO L413 NwaCegarLoop]: 4204 mSDtfsCounter, 4142 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4142 SdHoareTripleChecker+Valid, 4414 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 19:23:34,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4142 Valid, 4414 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 19:23:34,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51366 states. [2022-07-19 19:23:36,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51366 to 50970. [2022-07-19 19:23:36,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50970 states, 44226 states have (on average 1.4955908289241622) internal successors, (66144), 44745 states have internal predecessors, (66144), 4006 states have call successors, (4006), 2353 states have call predecessors, (4006), 2736 states have return successors, (7963), 3935 states have call predecessors, (7963), 4004 states have call successors, (7963) [2022-07-19 19:23:36,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50970 states to 50970 states and 78113 transitions. [2022-07-19 19:23:36,208 INFO L78 Accepts]: Start accepts. Automaton has 50970 states and 78113 transitions. Word has length 129 [2022-07-19 19:23:36,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 19:23:36,208 INFO L495 AbstractCegarLoop]: Abstraction has 50970 states and 78113 transitions. [2022-07-19 19:23:36,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-19 19:23:36,208 INFO L276 IsEmpty]: Start isEmpty. Operand 50970 states and 78113 transitions. [2022-07-19 19:23:36,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-07-19 19:23:36,274 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 19:23:36,274 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 19:23:36,291 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-19 19:23:36,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-19 19:23:36,487 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 19:23:36,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 19:23:36,488 INFO L85 PathProgramCache]: Analyzing trace with hash -2127588384, now seen corresponding path program 1 times [2022-07-19 19:23:36,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 19:23:36,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125420380] [2022-07-19 19:23:36,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 19:23:36,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 19:23:36,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:36,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 19:23:36,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:36,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 19:23:36,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:36,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-19 19:23:36,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:36,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-19 19:23:36,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:36,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-19 19:23:36,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:36,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-07-19 19:23:36,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:36,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-19 19:23:36,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:36,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-19 19:23:36,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:36,579 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-19 19:23:36,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 19:23:36,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125420380] [2022-07-19 19:23:36,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125420380] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 19:23:36,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766474419] [2022-07-19 19:23:36,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 19:23:36,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 19:23:36,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 19:23:36,581 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 19:23:36,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 19:23:36,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:36,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 19:23:36,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 19:23:36,690 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-19 19:23:36,692 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 19:23:36,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766474419] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 19:23:36,692 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 19:23:36,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-07-19 19:23:36,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448202222] [2022-07-19 19:23:36,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 19:23:36,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 19:23:36,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 19:23:36,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 19:23:36,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 19:23:36,695 INFO L87 Difference]: Start difference. First operand 50970 states and 78113 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-19 19:23:39,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 19:23:39,493 INFO L93 Difference]: Finished difference Result 146009 states and 224673 transitions. [2022-07-19 19:23:39,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 19:23:39,494 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 129 [2022-07-19 19:23:39,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 19:23:40,083 INFO L225 Difference]: With dead ends: 146009 [2022-07-19 19:23:40,083 INFO L226 Difference]: Without dead ends: 97173 [2022-07-19 19:23:40,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 19:23:40,174 INFO L413 NwaCegarLoop]: 4394 mSDtfsCounter, 194 mSDsluCounter, 4192 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 8586 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 19:23:40,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 8586 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 19:23:40,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97173 states. [2022-07-19 19:23:43,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97173 to 97173. [2022-07-19 19:23:43,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97173 states, 83954 states have (on average 1.4752245277175595) internal successors, (123851), 84858 states have internal predecessors, (123851), 7745 states have call successors, (7745), 4705 states have call predecessors, (7745), 5472 states have return successors, (17046), 7737 states have call predecessors, (17046), 7743 states have call successors, (17046) [2022-07-19 19:23:44,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97173 states to 97173 states and 148642 transitions. [2022-07-19 19:23:44,192 INFO L78 Accepts]: Start accepts. Automaton has 97173 states and 148642 transitions. Word has length 129 [2022-07-19 19:23:44,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 19:23:44,194 INFO L495 AbstractCegarLoop]: Abstraction has 97173 states and 148642 transitions. [2022-07-19 19:23:44,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-19 19:23:44,194 INFO L276 IsEmpty]: Start isEmpty. Operand 97173 states and 148642 transitions. [2022-07-19 19:23:44,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-07-19 19:23:44,420 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 19:23:44,420 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-19 19:23:44,438 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-19 19:23:44,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 19:23:44,634 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 19:23:44,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 19:23:44,634 INFO L85 PathProgramCache]: Analyzing trace with hash -318020336, now seen corresponding path program 1 times [2022-07-19 19:23:44,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 19:23:44,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90595131] [2022-07-19 19:23:44,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 19:23:44,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 19:23:44,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:44,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 19:23:44,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:44,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 19:23:44,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:44,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-19 19:23:44,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:44,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-19 19:23:44,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:44,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-19 19:23:44,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:44,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-07-19 19:23:44,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:44,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-19 19:23:44,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:44,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-07-19 19:23:44,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:44,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-19 19:23:44,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:44,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-07-19 19:23:44,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:44,710 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-19 19:23:44,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 19:23:44,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90595131] [2022-07-19 19:23:44,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90595131] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 19:23:44,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386235970] [2022-07-19 19:23:44,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 19:23:44,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 19:23:44,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 19:23:44,712 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) [2022-07-19 19:23:44,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 19:23:44,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 19:23:44,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 607 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 19:23:44,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 19:23:44,926 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-19 19:23:44,927 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 19:23:44,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386235970] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 19:23:44,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 19:23:44,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2022-07-19 19:23:44,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409020904] [2022-07-19 19:23:44,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 19:23:44,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 19:23:44,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 19:23:44,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 19:23:44,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 19:23:44,930 INFO L87 Difference]: Start difference. First operand 97173 states and 148642 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-07-19 19:23:50,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 19:23:50,928 INFO L93 Difference]: Finished difference Result 282449 states and 433585 transitions. [2022-07-19 19:23:50,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 19:23:50,929 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 167 [2022-07-19 19:23:50,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 19:23:51,666 INFO L225 Difference]: With dead ends: 282449 [2022-07-19 19:23:51,667 INFO L226 Difference]: Without dead ends: 187415 [2022-07-19 19:23:51,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 19:23:51,949 INFO L413 NwaCegarLoop]: 4207 mSDtfsCounter, 4098 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4098 SdHoareTripleChecker+Valid, 4417 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 19:23:51,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4098 Valid, 4417 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 19:23:52,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187415 states.