./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/chl-word-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87171bbc-eff7-4ee2-9b54-ee81837a4e3f/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87171bbc-eff7-4ee2-9b54-ee81837a4e3f/bin/utaipan-verify-DbMuA5NWw2/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87171bbc-eff7-4ee2-9b54-ee81837a4e3f/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87171bbc-eff7-4ee2-9b54-ee81837a4e3f/bin/utaipan-verify-DbMuA5NWw2/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/chl-word-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87171bbc-eff7-4ee2-9b54-ee81837a4e3f/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87171bbc-eff7-4ee2-9b54-ee81837a4e3f/bin/utaipan-verify-DbMuA5NWw2 --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash bf81f7b3bd1ceac2bf46c7c37f69effc0af9de17b18c7565156301fb49a6164e --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 12:29:42,607 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 12:29:42,687 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87171bbc-eff7-4ee2-9b54-ee81837a4e3f/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-02 12:29:42,694 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 12:29:42,695 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 12:29:42,735 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 12:29:42,736 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 12:29:42,737 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 12:29:42,738 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 12:29:42,739 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 12:29:42,740 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 12:29:42,740 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 12:29:42,740 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 12:29:42,741 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 12:29:42,741 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 12:29:42,743 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 12:29:42,744 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 12:29:42,744 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 12:29:42,744 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 12:29:42,745 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 12:29:42,745 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 12:29:42,749 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 12:29:42,750 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 12:29:42,750 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-02 12:29:42,750 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 12:29:42,750 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 12:29:42,751 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 12:29:42,751 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 12:29:42,751 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-02 12:29:42,751 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 12:29:42,752 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-02 12:29:42,752 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 12:29:42,752 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 12:29:42,752 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-02 12:29:42,752 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 12:29:42,755 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 12:29:42,755 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 12:29:42,755 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 12:29:42,756 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:29:42,756 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 12:29:42,756 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 12:29:42,757 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-02 12:29:42,757 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 12:29:42,757 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 12:29:42,758 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 12:29:42,758 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 12:29:42,758 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 12:29:42,758 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87171bbc-eff7-4ee2-9b54-ee81837a4e3f/bin/utaipan-verify-DbMuA5NWw2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87171bbc-eff7-4ee2-9b54-ee81837a4e3f/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bf81f7b3bd1ceac2bf46c7c37f69effc0af9de17b18c7565156301fb49a6164e [2024-11-02 12:29:43,150 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 12:29:43,176 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 12:29:43,182 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 12:29:43,183 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 12:29:43,184 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 12:29:43,187 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87171bbc-eff7-4ee2-9b54-ee81837a4e3f/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/weaver/chl-word-symm.wvr.c Unable to find full path for "g++" [2024-11-02 12:29:45,397 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 12:29:45,663 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 12:29:45,665 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87171bbc-eff7-4ee2-9b54-ee81837a4e3f/sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2024-11-02 12:29:45,676 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87171bbc-eff7-4ee2-9b54-ee81837a4e3f/bin/utaipan-verify-DbMuA5NWw2/data/61d56412b/173addbb19714486991486e2c85f5a43/FLAG20f612876 [2024-11-02 12:29:45,696 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87171bbc-eff7-4ee2-9b54-ee81837a4e3f/bin/utaipan-verify-DbMuA5NWw2/data/61d56412b/173addbb19714486991486e2c85f5a43 [2024-11-02 12:29:45,698 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 12:29:45,700 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 12:29:45,703 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 12:29:45,704 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 12:29:45,710 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 12:29:45,711 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:29:45" (1/1) ... [2024-11-02 12:29:45,712 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ca62d7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:29:45, skipping insertion in model container [2024-11-02 12:29:45,712 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:29:45" (1/1) ... [2024-11-02 12:29:45,753 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 12:29:46,019 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87171bbc-eff7-4ee2-9b54-ee81837a4e3f/sv-benchmarks/c/weaver/chl-word-symm.wvr.c[2874,2887] [2024-11-02 12:29:46,028 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:29:46,039 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 12:29:46,066 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87171bbc-eff7-4ee2-9b54-ee81837a4e3f/sv-benchmarks/c/weaver/chl-word-symm.wvr.c[2874,2887] [2024-11-02 12:29:46,070 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:29:46,089 INFO L204 MainTranslator]: Completed translation [2024-11-02 12:29:46,090 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:29:46 WrapperNode [2024-11-02 12:29:46,090 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 12:29:46,091 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 12:29:46,091 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 12:29:46,092 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 12:29:46,100 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:29:46" (1/1) ... [2024-11-02 12:29:46,109 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:29:46" (1/1) ... [2024-11-02 12:29:46,137 INFO L138 Inliner]: procedures = 23, calls = 25, calls flagged for inlining = 9, calls inlined = 11, statements flattened = 123 [2024-11-02 12:29:46,137 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 12:29:46,138 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 12:29:46,138 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 12:29:46,139 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 12:29:46,149 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:29:46" (1/1) ... [2024-11-02 12:29:46,149 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:29:46" (1/1) ... [2024-11-02 12:29:46,161 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:29:46" (1/1) ... [2024-11-02 12:29:46,161 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:29:46" (1/1) ... [2024-11-02 12:29:46,184 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:29:46" (1/1) ... [2024-11-02 12:29:46,194 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:29:46" (1/1) ... [2024-11-02 12:29:46,196 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:29:46" (1/1) ... [2024-11-02 12:29:46,202 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:29:46" (1/1) ... [2024-11-02 12:29:46,206 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 12:29:46,207 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 12:29:46,207 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 12:29:46,207 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 12:29:46,208 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:29:46" (1/1) ... [2024-11-02 12:29:46,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:29:46,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87171bbc-eff7-4ee2-9b54-ee81837a4e3f/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:29:46,243 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87171bbc-eff7-4ee2-9b54-ee81837a4e3f/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 12:29:46,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87171bbc-eff7-4ee2-9b54-ee81837a4e3f/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 12:29:46,283 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 12:29:46,283 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-02 12:29:46,283 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-02 12:29:46,283 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-02 12:29:46,285 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-02 12:29:46,285 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-02 12:29:46,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-02 12:29:46,286 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-02 12:29:46,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 12:29:46,286 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 12:29:46,286 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-02 12:29:46,290 WARN L207 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-02 12:29:46,416 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 12:29:46,418 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 12:29:46,891 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-02 12:29:46,891 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 12:29:47,321 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 12:29:47,321 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-02 12:29:47,322 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:29:47 BoogieIcfgContainer [2024-11-02 12:29:47,322 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 12:29:47,334 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 12:29:47,335 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 12:29:47,343 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 12:29:47,343 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 12:29:45" (1/3) ... [2024-11-02 12:29:47,344 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42d25d9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:29:47, skipping insertion in model container [2024-11-02 12:29:47,345 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:29:46" (2/3) ... [2024-11-02 12:29:47,347 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42d25d9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:29:47, skipping insertion in model container [2024-11-02 12:29:47,348 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:29:47" (3/3) ... [2024-11-02 12:29:47,349 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-word-symm.wvr.c [2024-11-02 12:29:47,373 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 12:29:47,374 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-02 12:29:47,374 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-02 12:29:47,456 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-02 12:29:47,505 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 33 places, 34 transitions, 82 flow [2024-11-02 12:29:47,564 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 126 states, 125 states have (on average 2.864) internal successors, (358), 125 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:29:47,608 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 12:29:47,620 INFO L333 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, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2edf1ee4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 12:29:47,620 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-02 12:29:47,625 INFO L276 IsEmpty]: Start isEmpty. Operand has 126 states, 125 states have (on average 2.864) internal successors, (358), 125 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:29:47,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-02 12:29:47,640 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:29:47,641 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:29:47,642 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-02 12:29:47,650 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:29:47,651 INFO L85 PathProgramCache]: Analyzing trace with hash 748395914, now seen corresponding path program 1 times [2024-11-02 12:29:47,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:29:47,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249555530] [2024-11-02 12:29:47,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:29:47,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:29:47,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:29:48,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:29:48,586 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:29:48,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249555530] [2024-11-02 12:29:48,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249555530] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:29:48,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:29:48,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-02 12:29:48,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869087617] [2024-11-02 12:29:48,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:29:48,593 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 12:29:48,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:29:48,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 12:29:48,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:29:48,622 INFO L87 Difference]: Start difference. First operand has 126 states, 125 states have (on average 2.864) internal successors, (358), 125 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:29:48,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:29:48,910 INFO L93 Difference]: Finished difference Result 207 states and 522 transitions. [2024-11-02 12:29:48,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 12:29:48,914 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-11-02 12:29:48,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:29:48,931 INFO L225 Difference]: With dead ends: 207 [2024-11-02 12:29:48,931 INFO L226 Difference]: Without dead ends: 154 [2024-11-02 12:29:48,935 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-02 12:29:48,943 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 16 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 12:29:48,944 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 3 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 12:29:48,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2024-11-02 12:29:48,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 126. [2024-11-02 12:29:48,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.816) internal successors, (352), 125 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:29:49,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 352 transitions. [2024-11-02 12:29:49,006 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 352 transitions. Word has length 17 [2024-11-02 12:29:49,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:29:49,009 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 352 transitions. [2024-11-02 12:29:49,010 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:29:49,010 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 352 transitions. [2024-11-02 12:29:49,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-02 12:29:49,012 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:29:49,012 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:29:49,016 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-02 12:29:49,016 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-02 12:29:49,017 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:29:49,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1165743298, now seen corresponding path program 2 times [2024-11-02 12:29:49,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:29:49,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481575503] [2024-11-02 12:29:49,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:29:49,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:29:49,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:29:49,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:29:49,354 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:29:49,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481575503] [2024-11-02 12:29:49,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481575503] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:29:49,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:29:49,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-02 12:29:49,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796673793] [2024-11-02 12:29:49,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:29:49,358 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 12:29:49,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:29:49,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 12:29:49,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:29:49,359 INFO L87 Difference]: Start difference. First operand 126 states and 352 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:29:49,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:29:49,614 INFO L93 Difference]: Finished difference Result 195 states and 489 transitions. [2024-11-02 12:29:49,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 12:29:49,614 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-11-02 12:29:49,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:29:49,617 INFO L225 Difference]: With dead ends: 195 [2024-11-02 12:29:49,617 INFO L226 Difference]: Without dead ends: 151 [2024-11-02 12:29:49,618 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-02 12:29:49,619 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 17 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 12:29:49,620 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 3 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 12:29:49,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2024-11-02 12:29:49,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 126. [2024-11-02 12:29:49,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.784) internal successors, (348), 125 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:29:49,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 348 transitions. [2024-11-02 12:29:49,640 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 348 transitions. Word has length 17 [2024-11-02 12:29:49,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:29:49,640 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 348 transitions. [2024-11-02 12:29:49,640 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:29:49,641 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 348 transitions. [2024-11-02 12:29:49,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-02 12:29:49,646 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:29:49,646 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:29:49,646 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-02 12:29:49,647 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-02 12:29:49,647 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:29:49,649 INFO L85 PathProgramCache]: Analyzing trace with hash 939283886, now seen corresponding path program 1 times [2024-11-02 12:29:49,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:29:49,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794937243] [2024-11-02 12:29:49,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:29:49,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:29:49,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:29:49,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:29:49,709 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:29:49,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794937243] [2024-11-02 12:29:49,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794937243] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:29:49,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:29:49,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 12:29:49,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186325676] [2024-11-02 12:29:49,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:29:49,711 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:29:49,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:29:49,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:29:49,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:29:49,713 INFO L87 Difference]: Start difference. First operand 126 states and 348 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:29:49,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:29:49,791 INFO L93 Difference]: Finished difference Result 166 states and 438 transitions. [2024-11-02 12:29:49,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:29:49,792 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-11-02 12:29:49,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:29:49,795 INFO L225 Difference]: With dead ends: 166 [2024-11-02 12:29:49,795 INFO L226 Difference]: Without dead ends: 126 [2024-11-02 12:29:49,796 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:29:49,797 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 16 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:29:49,798 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 1 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:29:49,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2024-11-02 12:29:49,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2024-11-02 12:29:49,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.616) internal successors, (327), 125 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:29:49,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 327 transitions. [2024-11-02 12:29:49,823 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 327 transitions. Word has length 19 [2024-11-02 12:29:49,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:29:49,824 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 327 transitions. [2024-11-02 12:29:49,824 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:29:49,824 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 327 transitions. [2024-11-02 12:29:49,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-02 12:29:49,825 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:29:49,826 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:29:49,828 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-02 12:29:49,828 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-02 12:29:49,829 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:29:49,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1812322671, now seen corresponding path program 1 times [2024-11-02 12:29:49,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:29:49,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88008184] [2024-11-02 12:29:49,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:29:49,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:29:49,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:29:50,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:29:50,516 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:29:50,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88008184] [2024-11-02 12:29:50,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88008184] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:29:50,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:29:50,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-02 12:29:50,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528570800] [2024-11-02 12:29:50,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:29:50,518 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-02 12:29:50,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:29:50,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-02 12:29:50,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-02 12:29:50,521 INFO L87 Difference]: Start difference. First operand 126 states and 327 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:29:50,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:29:50,907 INFO L93 Difference]: Finished difference Result 329 states and 835 transitions. [2024-11-02 12:29:50,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-02 12:29:50,908 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-11-02 12:29:50,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:29:50,912 INFO L225 Difference]: With dead ends: 329 [2024-11-02 12:29:50,912 INFO L226 Difference]: Without dead ends: 305 [2024-11-02 12:29:50,913 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-11-02 12:29:50,914 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 68 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-02 12:29:50,915 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 11 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-02 12:29:50,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2024-11-02 12:29:50,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 227. [2024-11-02 12:29:50,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.650442477876106) internal successors, (599), 226 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:29:50,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 599 transitions. [2024-11-02 12:29:50,943 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 599 transitions. Word has length 21 [2024-11-02 12:29:50,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:29:50,944 INFO L471 AbstractCegarLoop]: Abstraction has 227 states and 599 transitions. [2024-11-02 12:29:50,944 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:29:50,944 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 599 transitions. [2024-11-02 12:29:50,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-02 12:29:50,946 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:29:50,946 INFO L215 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] [2024-11-02 12:29:50,947 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-02 12:29:50,947 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-02 12:29:50,947 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:29:50,948 INFO L85 PathProgramCache]: Analyzing trace with hash 61969415, now seen corresponding path program 1 times [2024-11-02 12:29:50,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:29:50,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66440186] [2024-11-02 12:29:50,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:29:50,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:29:50,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:29:51,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:29:51,440 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:29:51,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66440186] [2024-11-02 12:29:51,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66440186] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:29:51,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634547781] [2024-11-02 12:29:51,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:29:51,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:29:51,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87171bbc-eff7-4ee2-9b54-ee81837a4e3f/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:29:51,447 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87171bbc-eff7-4ee2-9b54-ee81837a4e3f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:29:51,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87171bbc-eff7-4ee2-9b54-ee81837a4e3f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 12:29:51,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:29:51,572 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-02 12:29:51,578 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:29:52,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:29:52,206 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:29:53,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:29:53,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634547781] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-02 12:29:53,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-02 12:29:53,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9, 9] total 25 [2024-11-02 12:29:53,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382663006] [2024-11-02 12:29:53,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:29:53,005 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-02 12:29:53,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:29:53,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-02 12:29:53,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2024-11-02 12:29:53,007 INFO L87 Difference]: Start difference. First operand 227 states and 599 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:29:53,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:29:53,701 INFO L93 Difference]: Finished difference Result 487 states and 1237 transitions. [2024-11-02 12:29:53,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-02 12:29:53,702 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-11-02 12:29:53,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:29:53,705 INFO L225 Difference]: With dead ends: 487 [2024-11-02 12:29:53,706 INFO L226 Difference]: Without dead ends: 469 [2024-11-02 12:29:53,708 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=242, Invalid=948, Unknown=0, NotChecked=0, Total=1190 [2024-11-02 12:29:53,711 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 222 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-02 12:29:53,712 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 6 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-02 12:29:53,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2024-11-02 12:29:53,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 249. [2024-11-02 12:29:53,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 2.6411290322580645) internal successors, (655), 248 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:29:53,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 655 transitions. [2024-11-02 12:29:53,765 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 655 transitions. Word has length 22 [2024-11-02 12:29:53,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:29:53,766 INFO L471 AbstractCegarLoop]: Abstraction has 249 states and 655 transitions. [2024-11-02 12:29:53,766 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:29:53,766 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 655 transitions. [2024-11-02 12:29:53,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-02 12:29:53,768 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:29:53,769 INFO L215 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] [2024-11-02 12:29:53,792 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87171bbc-eff7-4ee2-9b54-ee81837a4e3f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-02 12:29:53,971 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87171bbc-eff7-4ee2-9b54-ee81837a4e3f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:29:53,971 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-02 12:29:53,972 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:29:53,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1348143355, now seen corresponding path program 2 times [2024-11-02 12:29:53,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:29:53,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367763664] [2024-11-02 12:29:53,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:29:53,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:29:53,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:29:54,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:29:54,401 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:29:54,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367763664] [2024-11-02 12:29:54,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367763664] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:29:54,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209194451] [2024-11-02 12:29:54,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-02 12:29:54,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:29:54,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87171bbc-eff7-4ee2-9b54-ee81837a4e3f/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:29:54,405 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87171bbc-eff7-4ee2-9b54-ee81837a4e3f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:29:54,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87171bbc-eff7-4ee2-9b54-ee81837a4e3f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-02 12:29:54,509 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-02 12:29:54,509 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-02 12:29:54,515 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-02 12:29:54,517 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:29:54,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-02 12:29:54,948 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 12:29:54,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209194451] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:29:54,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 12:29:54,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 16 [2024-11-02 12:29:54,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872468450] [2024-11-02 12:29:54,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:29:54,949 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-02 12:29:54,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:29:54,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-02 12:29:54,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2024-11-02 12:29:54,952 INFO L87 Difference]: Start difference. First operand 249 states and 655 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:29:55,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:29:55,315 INFO L93 Difference]: Finished difference Result 419 states and 1166 transitions. [2024-11-02 12:29:55,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-02 12:29:55,316 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-11-02 12:29:55,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:29:55,319 INFO L225 Difference]: With dead ends: 419 [2024-11-02 12:29:55,319 INFO L226 Difference]: Without dead ends: 401 [2024-11-02 12:29:55,320 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2024-11-02 12:29:55,321 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 83 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-02 12:29:55,321 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 4 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-02 12:29:55,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2024-11-02 12:29:55,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 281. [2024-11-02 12:29:55,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.732142857142857) internal successors, (765), 280 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:29:55,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 765 transitions. [2024-11-02 12:29:55,369 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 765 transitions. Word has length 22 [2024-11-02 12:29:55,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:29:55,369 INFO L471 AbstractCegarLoop]: Abstraction has 281 states and 765 transitions. [2024-11-02 12:29:55,369 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:29:55,370 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 765 transitions. [2024-11-02 12:29:55,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-02 12:29:55,371 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:29:55,371 INFO L215 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] [2024-11-02 12:29:55,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87171bbc-eff7-4ee2-9b54-ee81837a4e3f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-02 12:29:55,575 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87171bbc-eff7-4ee2-9b54-ee81837a4e3f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:29:55,576 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-02 12:29:55,577 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:29:55,577 INFO L85 PathProgramCache]: Analyzing trace with hash 420612153, now seen corresponding path program 3 times [2024-11-02 12:29:55,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:29:55,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635626518] [2024-11-02 12:29:55,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:29:55,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:29:55,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:29:56,030 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:29:56,032 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:29:56,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635626518] [2024-11-02 12:29:56,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635626518] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:29:56,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630478607] [2024-11-02 12:29:56,033 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-02 12:29:56,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:29:56,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87171bbc-eff7-4ee2-9b54-ee81837a4e3f/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:29:56,036 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87171bbc-eff7-4ee2-9b54-ee81837a4e3f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:29:56,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87171bbc-eff7-4ee2-9b54-ee81837a4e3f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-02 12:29:56,134 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-02 12:29:56,134 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-02 12:29:56,136 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-02 12:29:56,138 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:29:56,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:29:56,618 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:29:57,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:29:57,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630478607] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-02 12:29:57,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-02 12:29:57,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9, 9] total 25 [2024-11-02 12:29:57,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154686] [2024-11-02 12:29:57,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:29:57,744 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-02 12:29:57,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:29:57,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-02 12:29:57,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2024-11-02 12:29:57,745 INFO L87 Difference]: Start difference. First operand 281 states and 765 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:29:58,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:29:58,778 INFO L93 Difference]: Finished difference Result 548 states and 1452 transitions. [2024-11-02 12:29:58,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-02 12:29:58,778 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-11-02 12:29:58,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:29:58,783 INFO L225 Difference]: With dead ends: 548 [2024-11-02 12:29:58,783 INFO L226 Difference]: Without dead ends: 529 [2024-11-02 12:29:58,785 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=269, Invalid=991, Unknown=0, NotChecked=0, Total=1260 [2024-11-02 12:29:58,786 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 311 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-02 12:29:58,787 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [311 Valid, 7 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-02 12:29:58,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2024-11-02 12:29:58,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 233. [2024-11-02 12:29:58,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.6336206896551726) internal successors, (611), 232 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:29:58,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 611 transitions. [2024-11-02 12:29:58,841 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 611 transitions. Word has length 22 [2024-11-02 12:29:58,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:29:58,844 INFO L471 AbstractCegarLoop]: Abstraction has 233 states and 611 transitions. [2024-11-02 12:29:58,844 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:29:58,844 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 611 transitions. [2024-11-02 12:29:58,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-02 12:29:58,845 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:29:58,846 INFO L215 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] [2024-11-02 12:29:58,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87171bbc-eff7-4ee2-9b54-ee81837a4e3f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-02 12:29:59,050 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87171bbc-eff7-4ee2-9b54-ee81837a4e3f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:29:59,051 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-02 12:29:59,051 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:29:59,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1225128803, now seen corresponding path program 4 times [2024-11-02 12:29:59,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:29:59,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856852666] [2024-11-02 12:29:59,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:29:59,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:29:59,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:29:59,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:29:59,522 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:29:59,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856852666] [2024-11-02 12:29:59,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856852666] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:29:59,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950070808] [2024-11-02 12:29:59,522 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-02 12:29:59,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:29:59,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87171bbc-eff7-4ee2-9b54-ee81837a4e3f/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:29:59,527 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87171bbc-eff7-4ee2-9b54-ee81837a4e3f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:29:59,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87171bbc-eff7-4ee2-9b54-ee81837a4e3f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-02 12:29:59,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:29:59,637 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-02 12:29:59,639 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:30:00,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:30:00,139 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:30:01,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:30:01,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950070808] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-02 12:30:01,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-02 12:30:01,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9, 9] total 25 [2024-11-02 12:30:01,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956476594] [2024-11-02 12:30:01,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:30:01,079 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-02 12:30:01,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:30:01,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-02 12:30:01,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=514, Unknown=0, NotChecked=0, Total=650 [2024-11-02 12:30:01,080 INFO L87 Difference]: Start difference. First operand 233 states and 611 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:30:02,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:30:02,177 INFO L93 Difference]: Finished difference Result 563 states and 1420 transitions. [2024-11-02 12:30:02,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-02 12:30:02,177 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-11-02 12:30:02,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:30:02,182 INFO L225 Difference]: With dead ends: 563 [2024-11-02 12:30:02,182 INFO L226 Difference]: Without dead ends: 546 [2024-11-02 12:30:02,183 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=267, Invalid=993, Unknown=0, NotChecked=0, Total=1260 [2024-11-02 12:30:02,184 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 269 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-02 12:30:02,184 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 7 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-02 12:30:02,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2024-11-02 12:30:02,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 273. [2024-11-02 12:30:02,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 2.738970588235294) internal successors, (745), 272 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:30:02,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 745 transitions. [2024-11-02 12:30:02,244 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 745 transitions. Word has length 22 [2024-11-02 12:30:02,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:30:02,246 INFO L471 AbstractCegarLoop]: Abstraction has 273 states and 745 transitions. [2024-11-02 12:30:02,246 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:30:02,246 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 745 transitions. [2024-11-02 12:30:02,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-02 12:30:02,248 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:30:02,248 INFO L215 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] [2024-11-02 12:30:02,269 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87171bbc-eff7-4ee2-9b54-ee81837a4e3f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-02 12:30:02,452 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87171bbc-eff7-4ee2-9b54-ee81837a4e3f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:30:02,452 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-02 12:30:02,453 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:30:02,453 INFO L85 PathProgramCache]: Analyzing trace with hash 613639363, now seen corresponding path program 5 times [2024-11-02 12:30:02,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:30:02,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568552350] [2024-11-02 12:30:02,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:30:02,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:30:02,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:30:02,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:30:02,791 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:30:02,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568552350] [2024-11-02 12:30:02,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568552350] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:30:02,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584424484] [2024-11-02 12:30:02,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-02 12:30:02,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:30:02,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87171bbc-eff7-4ee2-9b54-ee81837a4e3f/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:30:02,794 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87171bbc-eff7-4ee2-9b54-ee81837a4e3f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:30:02,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87171bbc-eff7-4ee2-9b54-ee81837a4e3f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-02 12:30:02,889 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-02 12:30:02,890 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-02 12:30:02,892 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-02 12:30:02,894 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:30:03,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-02 12:30:03,244 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 12:30:03,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584424484] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:30:03,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 12:30:03,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 16 [2024-11-02 12:30:03,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926473726] [2024-11-02 12:30:03,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:30:03,245 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-02 12:30:03,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:30:03,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-02 12:30:03,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2024-11-02 12:30:03,246 INFO L87 Difference]: Start difference. First operand 273 states and 745 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:30:03,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:30:03,630 INFO L93 Difference]: Finished difference Result 371 states and 1008 transitions. [2024-11-02 12:30:03,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-02 12:30:03,630 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-11-02 12:30:03,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:30:03,634 INFO L225 Difference]: With dead ends: 371 [2024-11-02 12:30:03,634 INFO L226 Difference]: Without dead ends: 351 [2024-11-02 12:30:03,635 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2024-11-02 12:30:03,637 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 54 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-02 12:30:03,637 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 4 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-02 12:30:03,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2024-11-02 12:30:03,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 241. [2024-11-02 12:30:03,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.6458333333333335) internal successors, (635), 240 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:30:03,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 635 transitions. [2024-11-02 12:30:03,674 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 635 transitions. Word has length 22 [2024-11-02 12:30:03,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:30:03,675 INFO L471 AbstractCegarLoop]: Abstraction has 241 states and 635 transitions. [2024-11-02 12:30:03,675 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:30:03,675 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 635 transitions. [2024-11-02 12:30:03,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-02 12:30:03,677 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:30:03,678 INFO L215 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] [2024-11-02 12:30:03,701 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87171bbc-eff7-4ee2-9b54-ee81837a4e3f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-02 12:30:03,882 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87171bbc-eff7-4ee2-9b54-ee81837a4e3f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:30:03,882 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-02 12:30:03,883 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:30:03,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1584431613, now seen corresponding path program 6 times [2024-11-02 12:30:03,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:30:03,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323918855] [2024-11-02 12:30:03,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:30:03,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:30:03,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:30:04,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:30:04,221 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:30:04,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323918855] [2024-11-02 12:30:04,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323918855] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:30:04,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042144645] [2024-11-02 12:30:04,222 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-02 12:30:04,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:30:04,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87171bbc-eff7-4ee2-9b54-ee81837a4e3f/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:30:04,225 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87171bbc-eff7-4ee2-9b54-ee81837a4e3f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:30:04,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87171bbc-eff7-4ee2-9b54-ee81837a4e3f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-02 12:30:04,328 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-02 12:30:04,329 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-02 12:30:04,330 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-02 12:30:04,332 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:30:04,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:30:04,750 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:30:05,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:30:05,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042144645] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-02 12:30:05,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-02 12:30:05,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9, 9] total 25 [2024-11-02 12:30:05,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319894927] [2024-11-02 12:30:05,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:30:05,428 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-02 12:30:05,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:30:05,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-02 12:30:05,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=514, Unknown=0, NotChecked=0, Total=650 [2024-11-02 12:30:05,429 INFO L87 Difference]: Start difference. First operand 241 states and 635 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:30:06,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:30:06,178 INFO L93 Difference]: Finished difference Result 412 states and 1016 transitions. [2024-11-02 12:30:06,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-02 12:30:06,179 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-11-02 12:30:06,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:30:06,182 INFO L225 Difference]: With dead ends: 412 [2024-11-02 12:30:06,182 INFO L226 Difference]: Without dead ends: 395 [2024-11-02 12:30:06,185 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=245, Invalid=945, Unknown=0, NotChecked=0, Total=1190 [2024-11-02 12:30:06,186 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 187 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-02 12:30:06,186 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 11 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-02 12:30:06,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2024-11-02 12:30:06,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 226. [2024-11-02 12:30:06,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.6533333333333333) internal successors, (597), 225 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:30:06,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 597 transitions. [2024-11-02 12:30:06,229 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 597 transitions. Word has length 22 [2024-11-02 12:30:06,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:30:06,230 INFO L471 AbstractCegarLoop]: Abstraction has 226 states and 597 transitions. [2024-11-02 12:30:06,230 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:30:06,230 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 597 transitions. [2024-11-02 12:30:06,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-02 12:30:06,231 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:30:06,232 INFO L215 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] [2024-11-02 12:30:06,254 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87171bbc-eff7-4ee2-9b54-ee81837a4e3f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-02 12:30:06,433 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87171bbc-eff7-4ee2-9b54-ee81837a4e3f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-02 12:30:06,433 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-02 12:30:06,434 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:30:06,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1770800797, now seen corresponding path program 1 times [2024-11-02 12:30:06,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:30:06,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012643366] [2024-11-02 12:30:06,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:30:06,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:30:06,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:30:06,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:30:06,756 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:30:06,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012643366] [2024-11-02 12:30:06,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012643366] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:30:06,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38063331] [2024-11-02 12:30:06,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:30:06,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:30:06,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87171bbc-eff7-4ee2-9b54-ee81837a4e3f/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:30:06,759 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87171bbc-eff7-4ee2-9b54-ee81837a4e3f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:30:06,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87171bbc-eff7-4ee2-9b54-ee81837a4e3f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-02 12:30:06,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:30:06,848 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-02 12:30:06,850 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:30:07,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:30:07,158 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:30:07,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:30:07,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38063331] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-02 12:30:07,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-02 12:30:07,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 22 [2024-11-02 12:30:07,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545571958] [2024-11-02 12:30:07,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:30:07,631 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-02 12:30:07,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:30:07,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-02 12:30:07,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2024-11-02 12:30:07,632 INFO L87 Difference]: Start difference. First operand 226 states and 597 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:30:08,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:30:08,350 INFO L93 Difference]: Finished difference Result 654 states and 1661 transitions. [2024-11-02 12:30:08,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-02 12:30:08,351 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-11-02 12:30:08,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:30:08,355 INFO L225 Difference]: With dead ends: 654 [2024-11-02 12:30:08,355 INFO L226 Difference]: Without dead ends: 636 [2024-11-02 12:30:08,356 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=159, Invalid=653, Unknown=0, NotChecked=0, Total=812 [2024-11-02 12:30:08,357 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 159 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-02 12:30:08,357 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 11 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-02 12:30:08,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2024-11-02 12:30:08,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 250. [2024-11-02 12:30:08,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.63855421686747) internal successors, (657), 249 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:30:08,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 657 transitions. [2024-11-02 12:30:08,401 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 657 transitions. Word has length 22 [2024-11-02 12:30:08,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:30:08,401 INFO L471 AbstractCegarLoop]: Abstraction has 250 states and 657 transitions. [2024-11-02 12:30:08,401 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:30:08,401 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 657 transitions. [2024-11-02 12:30:08,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-02 12:30:08,402 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:30:08,403 INFO L215 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] [2024-11-02 12:30:08,424 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87171bbc-eff7-4ee2-9b54-ee81837a4e3f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-02 12:30:08,607 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87171bbc-eff7-4ee2-9b54-ee81837a4e3f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:30:08,608 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-02 12:30:08,609 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:30:08,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1114053729, now seen corresponding path program 2 times [2024-11-02 12:30:08,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:30:08,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295458131] [2024-11-02 12:30:08,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:30:08,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:30:08,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:30:09,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:30:09,055 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:30:09,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295458131] [2024-11-02 12:30:09,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295458131] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:30:09,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322078275] [2024-11-02 12:30:09,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-02 12:30:09,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:30:09,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87171bbc-eff7-4ee2-9b54-ee81837a4e3f/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:30:09,056 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87171bbc-eff7-4ee2-9b54-ee81837a4e3f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:30:09,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87171bbc-eff7-4ee2-9b54-ee81837a4e3f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-02 12:30:09,144 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-02 12:30:09,144 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-02 12:30:09,145 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-02 12:30:09,147 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:30:09,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-02 12:30:09,436 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 12:30:09,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322078275] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:30:09,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 12:30:09,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 14 [2024-11-02 12:30:09,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574626289] [2024-11-02 12:30:09,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:30:09,438 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-02 12:30:09,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:30:09,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-02 12:30:09,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2024-11-02 12:30:09,439 INFO L87 Difference]: Start difference. First operand 250 states and 657 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:30:09,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:30:09,919 INFO L93 Difference]: Finished difference Result 479 states and 1349 transitions. [2024-11-02 12:30:09,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-02 12:30:09,920 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-11-02 12:30:09,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:30:09,924 INFO L225 Difference]: With dead ends: 479 [2024-11-02 12:30:09,924 INFO L226 Difference]: Without dead ends: 461 [2024-11-02 12:30:09,925 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2024-11-02 12:30:09,926 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 58 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-02 12:30:09,926 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 4 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-02 12:30:09,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2024-11-02 12:30:09,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 282. [2024-11-02 12:30:09,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.7295373665480427) internal successors, (767), 281 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:30:09,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 767 transitions. [2024-11-02 12:30:09,985 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 767 transitions. Word has length 22 [2024-11-02 12:30:09,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:30:09,985 INFO L471 AbstractCegarLoop]: Abstraction has 282 states and 767 transitions. [2024-11-02 12:30:09,985 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:30:09,986 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 767 transitions. [2024-11-02 12:30:09,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-02 12:30:09,987 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:30:09,987 INFO L215 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] [2024-11-02 12:30:10,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87171bbc-eff7-4ee2-9b54-ee81837a4e3f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-02 12:30:10,187 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87171bbc-eff7-4ee2-9b54-ee81837a4e3f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:30:10,188 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-02 12:30:10,189 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:30:10,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1412158059, now seen corresponding path program 3 times [2024-11-02 12:30:10,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:30:10,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135398133] [2024-11-02 12:30:10,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:30:10,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:30:10,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:30:10,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:30:10,527 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:30:10,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135398133] [2024-11-02 12:30:10,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135398133] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:30:10,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137045197] [2024-11-02 12:30:10,527 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-02 12:30:10,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:30:10,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87171bbc-eff7-4ee2-9b54-ee81837a4e3f/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:30:10,531 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87171bbc-eff7-4ee2-9b54-ee81837a4e3f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:30:10,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87171bbc-eff7-4ee2-9b54-ee81837a4e3f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-02 12:30:10,638 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-02 12:30:10,638 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-02 12:30:10,640 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-02 12:30:10,642 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:30:11,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:30:11,037 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:30:11,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:30:11,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137045197] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-02 12:30:11,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-02 12:30:11,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [9, 10] total 27 [2024-11-02 12:30:11,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240732886] [2024-11-02 12:30:11,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:30:11,916 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-02 12:30:11,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:30:11,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-02 12:30:11,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2024-11-02 12:30:11,917 INFO L87 Difference]: Start difference. First operand 282 states and 767 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)