./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/stack-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a0165632 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_27f1acf3-c8b7-4096-b9b3-28dca485d0b9/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1acf3-c8b7-4096-b9b3-28dca485d0b9/bin/utaipan-verify-YMUCfTKeje/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1acf3-c8b7-4096-b9b3-28dca485d0b9/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1acf3-c8b7-4096-b9b3-28dca485d0b9/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread/stack-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1acf3-c8b7-4096-b9b3-28dca485d0b9/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1acf3-c8b7-4096-b9b3-28dca485d0b9/bin/utaipan-verify-YMUCfTKeje --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 a5e93db72222dd521789305cbf7823ac91f269c62c97020d54f95f5ba14d3fd2 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 07:08:44,238 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 07:08:44,341 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1acf3-c8b7-4096-b9b3-28dca485d0b9/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 07:08:44,349 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 07:08:44,350 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 07:08:44,388 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 07:08:44,389 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 07:08:44,390 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 07:08:44,391 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 07:08:44,393 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 07:08:44,393 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 07:08:44,394 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 07:08:44,394 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 07:08:44,394 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 07:08:44,395 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 07:08:44,395 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 07:08:44,396 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 07:08:44,396 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 07:08:44,400 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 07:08:44,400 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 07:08:44,404 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 07:08:44,404 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 07:08:44,405 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 07:08:44,405 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 07:08:44,406 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 07:08:44,406 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 07:08:44,408 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 07:08:44,408 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 07:08:44,409 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 07:08:44,409 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 07:08:44,409 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 07:08:44,410 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 07:08:44,410 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 07:08:44,410 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 07:08:44,411 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 07:08:44,411 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 07:08:44,412 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 07:08:44,412 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 07:08:44,412 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 07:08:44,413 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 07:08:44,413 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 07:08:44,414 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 07:08:44,414 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 07:08:44,415 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 07:08:44,415 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 07:08:44,415 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 07:08:44,415 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 07:08:44,416 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_27f1acf3-c8b7-4096-b9b3-28dca485d0b9/bin/utaipan-verify-YMUCfTKeje/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1acf3-c8b7-4096-b9b3-28dca485d0b9/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a5e93db72222dd521789305cbf7823ac91f269c62c97020d54f95f5ba14d3fd2 [2024-11-09 07:08:44,752 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 07:08:44,784 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 07:08:44,787 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 07:08:44,790 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 07:08:44,790 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 07:08:44,791 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1acf3-c8b7-4096-b9b3-28dca485d0b9/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/pthread/stack-1.i Unable to find full path for "g++" [2024-11-09 07:08:46,885 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 07:08:47,154 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 07:08:47,154 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1acf3-c8b7-4096-b9b3-28dca485d0b9/sv-benchmarks/c/pthread/stack-1.i [2024-11-09 07:08:47,173 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1acf3-c8b7-4096-b9b3-28dca485d0b9/bin/utaipan-verify-YMUCfTKeje/data/f40df66dc/a5950054de13482291016d52ba8b279a/FLAGf797bfb13 [2024-11-09 07:08:47,189 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1acf3-c8b7-4096-b9b3-28dca485d0b9/bin/utaipan-verify-YMUCfTKeje/data/f40df66dc/a5950054de13482291016d52ba8b279a [2024-11-09 07:08:47,191 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 07:08:47,195 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 07:08:47,196 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 07:08:47,197 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 07:08:47,203 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 07:08:47,204 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 07:08:47" (1/1) ... [2024-11-09 07:08:47,208 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7af2e5a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:08:47, skipping insertion in model container [2024-11-09 07:08:47,208 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 07:08:47" (1/1) ... [2024-11-09 07:08:47,280 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 07:08:47,850 WARN L250 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_27f1acf3-c8b7-4096-b9b3-28dca485d0b9/sv-benchmarks/c/pthread/stack-1.i[41520,41533] [2024-11-09 07:08:47,892 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 07:08:47,908 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 07:08:47,974 WARN L250 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_27f1acf3-c8b7-4096-b9b3-28dca485d0b9/sv-benchmarks/c/pthread/stack-1.i[41520,41533] [2024-11-09 07:08:47,983 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 07:08:48,048 INFO L204 MainTranslator]: Completed translation [2024-11-09 07:08:48,048 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:08:48 WrapperNode [2024-11-09 07:08:48,049 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 07:08:48,050 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 07:08:48,050 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 07:08:48,050 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 07:08:48,057 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:08:48" (1/1) ... [2024-11-09 07:08:48,071 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:08:48" (1/1) ... [2024-11-09 07:08:48,105 INFO L138 Inliner]: procedures = 277, calls = 35, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 148 [2024-11-09 07:08:48,105 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 07:08:48,106 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 07:08:48,106 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 07:08:48,106 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 07:08:48,118 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:08:48" (1/1) ... [2024-11-09 07:08:48,118 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:08:48" (1/1) ... [2024-11-09 07:08:48,122 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:08:48" (1/1) ... [2024-11-09 07:08:48,122 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:08:48" (1/1) ... [2024-11-09 07:08:48,130 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:08:48" (1/1) ... [2024-11-09 07:08:48,134 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:08:48" (1/1) ... [2024-11-09 07:08:48,138 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:08:48" (1/1) ... [2024-11-09 07:08:48,139 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:08:48" (1/1) ... [2024-11-09 07:08:48,143 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 07:08:48,144 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 07:08:48,144 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 07:08:48,144 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 07:08:48,145 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:08:48" (1/1) ... [2024-11-09 07:08:48,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 07:08:48,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1acf3-c8b7-4096-b9b3-28dca485d0b9/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:08:48,188 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1acf3-c8b7-4096-b9b3-28dca485d0b9/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 07:08:48,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1acf3-c8b7-4096-b9b3-28dca485d0b9/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 07:08:48,231 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-11-09 07:08:48,232 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-11-09 07:08:48,232 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-11-09 07:08:48,232 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-11-09 07:08:48,232 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-09 07:08:48,232 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-09 07:08:48,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-09 07:08:48,233 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-09 07:08:48,233 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 07:08:48,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 07:08:48,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 07:08:48,233 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 07:08:48,235 WARN L207 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-09 07:08:48,499 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 07:08:48,501 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 07:08:48,856 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-09 07:08:48,857 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 07:08:49,197 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 07:08:49,197 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-09 07:08:49,197 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 07:08:49 BoogieIcfgContainer [2024-11-09 07:08:49,198 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 07:08:49,200 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 07:08:49,200 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 07:08:49,205 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 07:08:49,205 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 07:08:47" (1/3) ... [2024-11-09 07:08:49,206 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dbbdc33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 07:08:49, skipping insertion in model container [2024-11-09 07:08:49,207 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:08:48" (2/3) ... [2024-11-09 07:08:49,207 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dbbdc33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 07:08:49, skipping insertion in model container [2024-11-09 07:08:49,207 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 07:08:49" (3/3) ... [2024-11-09 07:08:49,209 INFO L112 eAbstractionObserver]: Analyzing ICFG stack-1.i [2024-11-09 07:08:49,227 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 07:08:49,227 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-11-09 07:08:49,227 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-09 07:08:49,307 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-09 07:08:49,344 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 40 places, 40 transitions, 94 flow [2024-11-09 07:08:49,439 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 341 states, 338 states have (on average 2.8224852071005917) internal successors, (954), 340 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:08:49,472 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 07:08:49,479 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;@619158f9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 07:08:49,480 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-11-09 07:08:49,489 INFO L276 IsEmpty]: Start isEmpty. Operand has 341 states, 338 states have (on average 2.8224852071005917) internal successors, (954), 340 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:08:49,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-09 07:08:49,498 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:08:49,499 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:08:49,499 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-09 07:08:49,504 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:08:49,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1551536283, now seen corresponding path program 1 times [2024-11-09 07:08:49,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:08:49,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813404083] [2024-11-09 07:08:49,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:08:49,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:08:49,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:08:50,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:08:50,064 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:08:50,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813404083] [2024-11-09 07:08:50,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813404083] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:08:50,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:08:50,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 07:08:50,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690860761] [2024-11-09 07:08:50,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:08:50,071 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 07:08:50,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:08:50,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 07:08:50,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 07:08:50,092 INFO L87 Difference]: Start difference. First operand has 341 states, 338 states have (on average 2.8224852071005917) internal successors, (954), 340 states have internal predecessors, (954), 0 states have call successors, (0), 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 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:08:50,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:08:50,285 INFO L93 Difference]: Finished difference Result 830 states and 2342 transitions. [2024-11-09 07:08:50,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 07:08:50,290 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2024-11-09 07:08:50,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:08:50,317 INFO L225 Difference]: With dead ends: 830 [2024-11-09 07:08:50,317 INFO L226 Difference]: Without dead ends: 451 [2024-11-09 07:08:50,323 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 07:08:50,329 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 36 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:08:50,330 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 39 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:08:50,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2024-11-09 07:08:50,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 451. [2024-11-09 07:08:50,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 448 states have (on average 2.6361607142857144) internal successors, (1181), 450 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:08:50,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 1181 transitions. [2024-11-09 07:08:50,438 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 1181 transitions. Word has length 9 [2024-11-09 07:08:50,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:08:50,441 INFO L471 AbstractCegarLoop]: Abstraction has 451 states and 1181 transitions. [2024-11-09 07:08:50,441 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:08:50,442 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 1181 transitions. [2024-11-09 07:08:50,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-09 07:08:50,444 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:08:50,444 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:08:50,445 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 07:08:50,445 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-09 07:08:50,448 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:08:50,449 INFO L85 PathProgramCache]: Analyzing trace with hash 716821463, now seen corresponding path program 1 times [2024-11-09 07:08:50,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:08:50,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291036678] [2024-11-09 07:08:50,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:08:50,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:08:50,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:08:50,770 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:08:50,771 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:08:50,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291036678] [2024-11-09 07:08:50,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291036678] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:08:50,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773088619] [2024-11-09 07:08:50,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:08:50,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:08:50,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1acf3-c8b7-4096-b9b3-28dca485d0b9/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:08:50,775 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1acf3-c8b7-4096-b9b3-28dca485d0b9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:08:50,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1acf3-c8b7-4096-b9b3-28dca485d0b9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 07:08:50,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:08:50,952 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 07:08:50,959 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:08:51,092 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 07:08:51,292 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:08:51,293 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:08:51,480 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:08:51,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773088619] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:08:51,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1426937807] [2024-11-09 07:08:51,491 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:311) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:286) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:251) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:118) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:236) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-09 07:08:51,498 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:08:51,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2024-11-09 07:08:51,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460619112] [2024-11-09 07:08:51,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:08:51,502 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 07:08:51,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:08:51,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 07:08:51,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-09 07:08:51,503 INFO L87 Difference]: Start difference. First operand 451 states and 1181 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:08:52,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:08:52,170 INFO L93 Difference]: Finished difference Result 2168 states and 5982 transitions. [2024-11-09 07:08:52,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-09 07:08:52,171 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 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 16 [2024-11-09 07:08:52,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:08:52,185 INFO L225 Difference]: With dead ends: 2168 [2024-11-09 07:08:52,186 INFO L226 Difference]: Without dead ends: 1765 [2024-11-09 07:08:52,189 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2024-11-09 07:08:52,190 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 433 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 07:08:52,191 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [433 Valid, 179 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 07:08:52,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1765 states. [2024-11-09 07:08:52,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1765 to 1235. [2024-11-09 07:08:52,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1235 states, 1232 states have (on average 2.7199675324675323) internal successors, (3351), 1234 states have internal predecessors, (3351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:08:52,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1235 states to 1235 states and 3351 transitions. [2024-11-09 07:08:52,294 INFO L78 Accepts]: Start accepts. Automaton has 1235 states and 3351 transitions. Word has length 16 [2024-11-09 07:08:52,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:08:52,295 INFO L471 AbstractCegarLoop]: Abstraction has 1235 states and 3351 transitions. [2024-11-09 07:08:52,296 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:08:52,296 INFO L276 IsEmpty]: Start isEmpty. Operand 1235 states and 3351 transitions. [2024-11-09 07:08:52,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-09 07:08:52,300 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:08:52,300 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:08:52,326 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1acf3-c8b7-4096-b9b3-28dca485d0b9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 07:08:52,501 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1acf3-c8b7-4096-b9b3-28dca485d0b9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2024-11-09 07:08:52,502 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-09 07:08:52,502 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:08:52,503 INFO L85 PathProgramCache]: Analyzing trace with hash 553386777, now seen corresponding path program 1 times [2024-11-09 07:08:52,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:08:52,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381093049] [2024-11-09 07:08:52,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:08:52,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:08:52,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:08:52,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:08:52,676 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:08:52,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381093049] [2024-11-09 07:08:52,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381093049] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:08:52,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:08:52,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 07:08:52,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628048169] [2024-11-09 07:08:52,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:08:52,680 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 07:08:52,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:08:52,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 07:08:52,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 07:08:52,682 INFO L87 Difference]: Start difference. First operand 1235 states and 3351 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 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) [2024-11-09 07:08:52,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:08:52,811 INFO L93 Difference]: Finished difference Result 1896 states and 5189 transitions. [2024-11-09 07:08:52,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 07:08:52,811 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 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 [2024-11-09 07:08:52,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:08:52,819 INFO L225 Difference]: With dead ends: 1896 [2024-11-09 07:08:52,819 INFO L226 Difference]: Without dead ends: 843 [2024-11-09 07:08:52,821 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 [2024-11-09 07:08:52,823 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 22 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 28 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 [2024-11-09 07:08:52,823 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 28 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:08:52,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2024-11-09 07:08:52,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 795. [2024-11-09 07:08:52,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 795 states, 791 states have (on average 2.61314791403287) internal successors, (2067), 794 states have internal predecessors, (2067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:08:52,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 2067 transitions. [2024-11-09 07:08:52,869 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 2067 transitions. Word has length 17 [2024-11-09 07:08:52,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:08:52,870 INFO L471 AbstractCegarLoop]: Abstraction has 795 states and 2067 transitions. [2024-11-09 07:08:52,871 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 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) [2024-11-09 07:08:52,871 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 2067 transitions. [2024-11-09 07:08:52,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-09 07:08:52,875 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:08:52,875 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:08:52,875 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 07:08:52,876 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-09 07:08:52,876 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:08:52,876 INFO L85 PathProgramCache]: Analyzing trace with hash -281318186, now seen corresponding path program 1 times [2024-11-09 07:08:52,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:08:52,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504078180] [2024-11-09 07:08:52,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:08:52,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:08:52,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:08:53,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:08:53,671 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:08:53,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504078180] [2024-11-09 07:08:53,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504078180] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:08:53,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:08:53,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 07:08:53,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252440215] [2024-11-09 07:08:53,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:08:53,673 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 07:08:53,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:08:53,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 07:08:53,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 07:08:53,677 INFO L87 Difference]: Start difference. First operand 795 states and 2067 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 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) [2024-11-09 07:08:53,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:08:53,921 INFO L93 Difference]: Finished difference Result 1114 states and 2881 transitions. [2024-11-09 07:08:53,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 07:08:53,922 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 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 [2024-11-09 07:08:53,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:08:53,929 INFO L225 Difference]: With dead ends: 1114 [2024-11-09 07:08:53,929 INFO L226 Difference]: Without dead ends: 1044 [2024-11-09 07:08:53,930 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-09 07:08:53,931 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 38 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:08:53,932 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 52 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:08:53,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2024-11-09 07:08:53,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 908. [2024-11-09 07:08:53,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 908 states, 904 states have (on average 2.6305309734513274) internal successors, (2378), 907 states have internal predecessors, (2378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:08:53,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 908 states to 908 states and 2378 transitions. [2024-11-09 07:08:53,995 INFO L78 Accepts]: Start accepts. Automaton has 908 states and 2378 transitions. Word has length 19 [2024-11-09 07:08:53,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:08:53,995 INFO L471 AbstractCegarLoop]: Abstraction has 908 states and 2378 transitions. [2024-11-09 07:08:53,996 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 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) [2024-11-09 07:08:53,996 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states and 2378 transitions. [2024-11-09 07:08:53,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-09 07:08:53,998 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:08:53,998 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:08:53,998 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-09 07:08:53,998 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-09 07:08:53,999 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:08:53,999 INFO L85 PathProgramCache]: Analyzing trace with hash -710772060, now seen corresponding path program 1 times [2024-11-09 07:08:53,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:08:53,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160527684] [2024-11-09 07:08:53,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:08:53,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:08:54,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:08:54,723 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:08:54,724 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:08:54,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160527684] [2024-11-09 07:08:54,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160527684] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:08:54,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584850734] [2024-11-09 07:08:54,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:08:54,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:08:54,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1acf3-c8b7-4096-b9b3-28dca485d0b9/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:08:54,729 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1acf3-c8b7-4096-b9b3-28dca485d0b9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:08:54,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1acf3-c8b7-4096-b9b3-28dca485d0b9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 07:08:54,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:08:54,875 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-09 07:08:54,883 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:08:54,922 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 07:08:55,066 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 1 [2024-11-09 07:08:55,264 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 32 [2024-11-09 07:08:55,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:08:55,345 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:08:55,889 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2024-11-09 07:08:55,947 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:08:55,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584850734] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:08:55,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1278800703] [2024-11-09 07:08:55,948 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:311) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:286) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:251) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:118) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:236) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-09 07:08:55,949 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:08:55,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2024-11-09 07:08:55,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020001008] [2024-11-09 07:08:55,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:08:55,950 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-09 07:08:55,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:08:55,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-09 07:08:55,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2024-11-09 07:08:55,951 INFO L87 Difference]: Start difference. First operand 908 states and 2378 transitions. Second operand has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 13 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:08:58,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:08:58,380 INFO L93 Difference]: Finished difference Result 3358 states and 8767 transitions. [2024-11-09 07:08:58,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-09 07:08:58,382 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 13 states have internal predecessors, (76), 0 states have call successors, (0), 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 26 [2024-11-09 07:08:58,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:08:58,402 INFO L225 Difference]: With dead ends: 3358 [2024-11-09 07:08:58,406 INFO L226 Difference]: Without dead ends: 3162 [2024-11-09 07:08:58,408 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=333, Invalid=1149, Unknown=0, NotChecked=0, Total=1482 [2024-11-09 07:08:58,409 INFO L432 NwaCegarLoop]: 69 mSDtfsCounter, 489 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 861 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:08:58,410 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [489 Valid, 576 Invalid, 883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 861 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-09 07:08:58,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3162 states. [2024-11-09 07:08:58,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3162 to 930. [2024-11-09 07:08:58,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 930 states, 926 states have (on average 2.6727861771058317) internal successors, (2475), 929 states have internal predecessors, (2475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:08:58,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 930 states to 930 states and 2475 transitions. [2024-11-09 07:08:58,567 INFO L78 Accepts]: Start accepts. Automaton has 930 states and 2475 transitions. Word has length 26 [2024-11-09 07:08:58,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:08:58,569 INFO L471 AbstractCegarLoop]: Abstraction has 930 states and 2475 transitions. [2024-11-09 07:08:58,570 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 13 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:08:58,570 INFO L276 IsEmpty]: Start isEmpty. Operand 930 states and 2475 transitions. [2024-11-09 07:08:58,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-09 07:08:58,572 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:08:58,573 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:08:58,595 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1acf3-c8b7-4096-b9b3-28dca485d0b9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 07:08:58,773 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1acf3-c8b7-4096-b9b3-28dca485d0b9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:08:58,774 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-09 07:08:58,774 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:08:58,774 INFO L85 PathProgramCache]: Analyzing trace with hash 2070239960, now seen corresponding path program 1 times [2024-11-09 07:08:58,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:08:58,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884467334] [2024-11-09 07:08:58,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:08:58,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:08:58,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:08:59,199 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 07:08:59,200 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:08:59,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884467334] [2024-11-09 07:08:59,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884467334] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:08:59,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042577918] [2024-11-09 07:08:59,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:08:59,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:08:59,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1acf3-c8b7-4096-b9b3-28dca485d0b9/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:08:59,203 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1acf3-c8b7-4096-b9b3-28dca485d0b9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:08:59,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1acf3-c8b7-4096-b9b3-28dca485d0b9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 07:08:59,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:08:59,347 INFO L255 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 07:08:59,352 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:08:59,389 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 07:08:59,495 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 07:08:59,780 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:08:59,781 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:08:59,864 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 07:08:59,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042577918] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:08:59,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [739526684] [2024-11-09 07:08:59,865 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:311) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:286) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:251) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:118) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:236) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-09 07:08:59,866 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:08:59,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 13 [2024-11-09 07:08:59,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523913534] [2024-11-09 07:08:59,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:08:59,867 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 07:08:59,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:08:59,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 07:08:59,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2024-11-09 07:08:59,871 INFO L87 Difference]: Start difference. First operand 930 states and 2475 transitions. Second operand has 13 states, 13 states have (on average 7.0) internal successors, (91), 13 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:09:01,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:09:01,006 INFO L93 Difference]: Finished difference Result 3514 states and 9417 transitions. [2024-11-09 07:09:01,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-09 07:09:01,007 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.0) internal successors, (91), 13 states have internal predecessors, (91), 0 states have call successors, (0), 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 33 [2024-11-09 07:09:01,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:09:01,024 INFO L225 Difference]: With dead ends: 3514 [2024-11-09 07:09:01,024 INFO L226 Difference]: Without dead ends: 2687 [2024-11-09 07:09:01,027 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2024-11-09 07:09:01,028 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 466 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 466 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 07:09:01,029 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [466 Valid, 257 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 07:09:01,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2687 states. [2024-11-09 07:09:01,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2687 to 1505. [2024-11-09 07:09:01,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1505 states, 1501 states have (on average 2.7808127914723517) internal successors, (4174), 1504 states have internal predecessors, (4174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:09:01,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1505 states to 1505 states and 4174 transitions. [2024-11-09 07:09:01,237 INFO L78 Accepts]: Start accepts. Automaton has 1505 states and 4174 transitions. Word has length 33 [2024-11-09 07:09:01,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:09:01,238 INFO L471 AbstractCegarLoop]: Abstraction has 1505 states and 4174 transitions. [2024-11-09 07:09:01,238 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.0) internal successors, (91), 13 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:09:01,238 INFO L276 IsEmpty]: Start isEmpty. Operand 1505 states and 4174 transitions. [2024-11-09 07:09:01,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-09 07:09:01,241 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:09:01,241 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:09:01,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1acf3-c8b7-4096-b9b3-28dca485d0b9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-09 07:09:01,442 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1acf3-c8b7-4096-b9b3-28dca485d0b9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-09 07:09:01,442 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-09 07:09:01,443 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:09:01,443 INFO L85 PathProgramCache]: Analyzing trace with hash -2071770502, now seen corresponding path program 1 times [2024-11-09 07:09:01,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:09:01,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103445177] [2024-11-09 07:09:01,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:09:01,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:09:01,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:09:02,374 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:09:02,374 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:09:02,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103445177] [2024-11-09 07:09:02,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103445177] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:09:02,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900442035] [2024-11-09 07:09:02,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:09:02,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:09:02,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1acf3-c8b7-4096-b9b3-28dca485d0b9/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:09:02,377 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1acf3-c8b7-4096-b9b3-28dca485d0b9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:09:02,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1acf3-c8b7-4096-b9b3-28dca485d0b9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 07:09:02,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:09:02,536 INFO L255 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 07:09:02,541 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:09:02,599 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-09 07:09:02,904 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 66 [2024-11-09 07:09:02,917 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 94 [2024-11-09 07:09:02,986 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:09:02,986 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 43 [2024-11-09 07:09:03,809 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:09:03,810 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 57 [2024-11-09 07:09:03,879 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:09:03,879 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:09:04,876 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:09:04,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 12 [2024-11-09 07:09:04,911 INFO L349 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2024-11-09 07:09:04,912 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 66 [2024-11-09 07:09:05,012 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:09:05,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900442035] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:09:05,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1643494260] [2024-11-09 07:09:05,013 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:311) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:286) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:251) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:118) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:236) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-09 07:09:05,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:09:05,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2024-11-09 07:09:05,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362678217] [2024-11-09 07:09:05,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:09:05,016 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-09 07:09:05,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:09:05,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-09 07:09:05,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2024-11-09 07:09:05,018 INFO L87 Difference]: Start difference. First operand 1505 states and 4174 transitions. Second operand has 17 states, 17 states have (on average 5.882352941176471) internal successors, (100), 16 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:09:08,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:09:08,530 INFO L93 Difference]: Finished difference Result 5174 states and 14176 transitions. [2024-11-09 07:09:08,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-09 07:09:08,531 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.882352941176471) internal successors, (100), 16 states have internal predecessors, (100), 0 states have call successors, (0), 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 34 [2024-11-09 07:09:08,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:09:08,557 INFO L225 Difference]: With dead ends: 5174 [2024-11-09 07:09:08,557 INFO L226 Difference]: Without dead ends: 3562 [2024-11-09 07:09:08,561 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=354, Invalid=1128, Unknown=0, NotChecked=0, Total=1482 [2024-11-09 07:09:08,562 INFO L432 NwaCegarLoop]: 77 mSDtfsCounter, 498 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 916 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 621 SdHoareTripleChecker+Invalid, 944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-09 07:09:08,563 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [498 Valid, 621 Invalid, 944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 916 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-09 07:09:08,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3562 states. [2024-11-09 07:09:08,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3562 to 1482. [2024-11-09 07:09:08,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1482 states, 1478 states have (on average 2.730040595399188) internal successors, (4035), 1481 states have internal predecessors, (4035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:09:08,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1482 states to 1482 states and 4035 transitions. [2024-11-09 07:09:08,869 INFO L78 Accepts]: Start accepts. Automaton has 1482 states and 4035 transitions. Word has length 34 [2024-11-09 07:09:08,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:09:08,870 INFO L471 AbstractCegarLoop]: Abstraction has 1482 states and 4035 transitions. [2024-11-09 07:09:08,871 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.882352941176471) internal successors, (100), 16 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:09:08,871 INFO L276 IsEmpty]: Start isEmpty. Operand 1482 states and 4035 transitions. [2024-11-09 07:09:08,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-09 07:09:08,874 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:09:08,874 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1] [2024-11-09 07:09:08,896 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1acf3-c8b7-4096-b9b3-28dca485d0b9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 07:09:09,075 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1acf3-c8b7-4096-b9b3-28dca485d0b9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-09 07:09:09,075 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-09 07:09:09,076 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:09:09,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1168832923, now seen corresponding path program 2 times [2024-11-09 07:09:09,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:09:09,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051616784] [2024-11-09 07:09:09,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:09:09,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:09:09,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:09:09,576 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:09:09,577 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:09:09,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051616784] [2024-11-09 07:09:09,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051616784] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:09:09,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824092587] [2024-11-09 07:09:09,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 07:09:09,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:09:09,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1acf3-c8b7-4096-b9b3-28dca485d0b9/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:09:09,585 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1acf3-c8b7-4096-b9b3-28dca485d0b9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:09:09,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1acf3-c8b7-4096-b9b3-28dca485d0b9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 07:09:09,750 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-09 07:09:09,750 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:09:09,755 INFO L255 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-09 07:09:09,760 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:09:09,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 07:09:09,819 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 07:09:09,861 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 07:09:09,913 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 07:09:09,956 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:09:09,957 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:09:10,147 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:09:10,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824092587] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:09:10,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1014909993] [2024-11-09 07:09:10,148 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:311) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:286) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:251) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:118) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:236) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-09 07:09:10,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:09:10,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2024-11-09 07:09:10,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292883508] [2024-11-09 07:09:10,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:09:10,150 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-09 07:09:10,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:09:10,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-09 07:09:10,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2024-11-09 07:09:10,152 INFO L87 Difference]: Start difference. First operand 1482 states and 4035 transitions. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 17 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:09:12,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:09:12,820 INFO L93 Difference]: Finished difference Result 9627 states and 26293 transitions. [2024-11-09 07:09:12,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-11-09 07:09:12,822 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 17 states have internal predecessors, (88), 0 states have call successors, (0), 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 37 [2024-11-09 07:09:12,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:09:12,896 INFO L225 Difference]: With dead ends: 9627 [2024-11-09 07:09:12,896 INFO L226 Difference]: Without dead ends: 8582 [2024-11-09 07:09:12,903 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=459, Invalid=1521, Unknown=0, NotChecked=0, Total=1980 [2024-11-09 07:09:12,904 INFO L432 NwaCegarLoop]: 57 mSDtfsCounter, 1418 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1418 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-09 07:09:12,905 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1418 Valid, 456 Invalid, 867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-09 07:09:12,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8582 states. [2024-11-09 07:09:13,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8582 to 5658. [2024-11-09 07:09:13,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5658 states, 5654 states have (on average 2.9361513972408915) internal successors, (16601), 5657 states have internal predecessors, (16601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:09:13,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5658 states to 5658 states and 16601 transitions. [2024-11-09 07:09:13,768 INFO L78 Accepts]: Start accepts. Automaton has 5658 states and 16601 transitions. Word has length 37 [2024-11-09 07:09:13,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:09:13,769 INFO L471 AbstractCegarLoop]: Abstraction has 5658 states and 16601 transitions. [2024-11-09 07:09:13,769 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 17 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:09:13,769 INFO L276 IsEmpty]: Start isEmpty. Operand 5658 states and 16601 transitions. [2024-11-09 07:09:13,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-09 07:09:13,773 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:09:13,773 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1] [2024-11-09 07:09:13,793 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1acf3-c8b7-4096-b9b3-28dca485d0b9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 07:09:13,974 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1acf3-c8b7-4096-b9b3-28dca485d0b9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-09 07:09:13,974 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-09 07:09:13,979 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:09:13,979 INFO L85 PathProgramCache]: Analyzing trace with hash -420394281, now seen corresponding path program 3 times [2024-11-09 07:09:13,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:09:13,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001165564] [2024-11-09 07:09:13,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:09:13,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:09:14,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:09:14,270 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 66 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:09:14,271 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:09:14,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001165564] [2024-11-09 07:09:14,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001165564] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:09:14,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389334556] [2024-11-09 07:09:14,271 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 07:09:14,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:09:14,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1acf3-c8b7-4096-b9b3-28dca485d0b9/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:09:14,274 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1acf3-c8b7-4096-b9b3-28dca485d0b9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:09:14,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1acf3-c8b7-4096-b9b3-28dca485d0b9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 07:09:14,418 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 07:09:14,418 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:09:14,420 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 07:09:14,422 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:09:14,491 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:09:14,491 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 07:09:14,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389334556] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:09:14,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 07:09:14,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 9 [2024-11-09 07:09:14,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250586613] [2024-11-09 07:09:14,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:09:14,493 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-09 07:09:14,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:09:14,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-09 07:09:14,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-11-09 07:09:14,495 INFO L87 Difference]: Start difference. First operand 5658 states and 16601 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:09:16,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:09:16,085 INFO L93 Difference]: Finished difference Result 13402 states and 38648 transitions. [2024-11-09 07:09:16,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 07:09:16,086 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 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 44 [2024-11-09 07:09:16,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:09:16,118 INFO L225 Difference]: With dead ends: 13402 [2024-11-09 07:09:16,118 INFO L226 Difference]: Without dead ends: 4964 [2024-11-09 07:09:16,131 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-11-09 07:09:16,132 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 138 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 07:09:16,132 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 103 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 07:09:16,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4964 states. [2024-11-09 07:09:16,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4964 to 2164. [2024-11-09 07:09:16,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2164 states, 2160 states have (on average 2.5689814814814813) internal successors, (5549), 2163 states have internal predecessors, (5549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:09:16,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2164 states to 2164 states and 5549 transitions. [2024-11-09 07:09:16,670 INFO L78 Accepts]: Start accepts. Automaton has 2164 states and 5549 transitions. Word has length 44 [2024-11-09 07:09:16,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:09:16,671 INFO L471 AbstractCegarLoop]: Abstraction has 2164 states and 5549 transitions. [2024-11-09 07:09:16,671 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:09:16,672 INFO L276 IsEmpty]: Start isEmpty. Operand 2164 states and 5549 transitions. [2024-11-09 07:09:16,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-09 07:09:16,679 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:09:16,679 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:09:16,702 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1acf3-c8b7-4096-b9b3-28dca485d0b9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 07:09:16,883 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1acf3-c8b7-4096-b9b3-28dca485d0b9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-09 07:09:16,884 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-09 07:09:16,884 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:09:16,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1301622466, now seen corresponding path program 2 times [2024-11-09 07:09:16,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:09:16,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816314742] [2024-11-09 07:09:16,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:09:16,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:09:16,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:09:18,780 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:09:18,781 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:09:18,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816314742] [2024-11-09 07:09:18,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816314742] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:09:18,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502042162] [2024-11-09 07:09:18,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 07:09:18,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:09:18,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1acf3-c8b7-4096-b9b3-28dca485d0b9/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:09:18,784 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1acf3-c8b7-4096-b9b3-28dca485d0b9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:09:18,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1acf3-c8b7-4096-b9b3-28dca485d0b9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 07:09:18,969 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 07:09:18,969 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:09:18,971 INFO L255 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-09 07:09:18,985 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:09:19,067 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2024-11-09 07:09:19,180 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 46 [2024-11-09 07:09:19,185 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 64 [2024-11-09 07:09:19,202 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2024-11-09 07:09:19,616 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 46 [2024-11-09 07:09:20,963 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:09:20,963 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 119 treesize of output 63 [2024-11-09 07:09:21,020 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:09:21,021 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:09:22,042 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 8 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:09:22,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502042162] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:09:22,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [92765527] [2024-11-09 07:09:22,044 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:311) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:286) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:251) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:118) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:236) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-09 07:09:22,045 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:09:22,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 25 [2024-11-09 07:09:22,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410352061] [2024-11-09 07:09:22,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:09:22,046 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-09 07:09:22,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:09:22,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-09 07:09:22,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2024-11-09 07:09:22,047 INFO L87 Difference]: Start difference. First operand 2164 states and 5549 transitions. Second operand has 25 states, 25 states have (on average 5.52) internal successors, (138), 25 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:09:24,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:09:24,994 INFO L93 Difference]: Finished difference Result 4979 states and 12552 transitions. [2024-11-09 07:09:24,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-09 07:09:24,995 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.52) internal successors, (138), 25 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2024-11-09 07:09:24,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:09:25,014 INFO L225 Difference]: With dead ends: 4979 [2024-11-09 07:09:25,014 INFO L226 Difference]: Without dead ends: 3348 [2024-11-09 07:09:25,019 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=480, Invalid=1590, Unknown=0, NotChecked=0, Total=2070 [2024-11-09 07:09:25,020 INFO L432 NwaCegarLoop]: 54 mSDtfsCounter, 686 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 895 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 686 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-09 07:09:25,020 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [686 Valid, 560 Invalid, 933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 895 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-09 07:09:25,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3348 states. [2024-11-09 07:09:25,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3348 to 2312. [2024-11-09 07:09:25,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2312 states, 2308 states have (on average 2.4449740034662044) internal successors, (5643), 2311 states have internal predecessors, (5643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:09:25,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2312 states to 2312 states and 5643 transitions. [2024-11-09 07:09:25,605 INFO L78 Accepts]: Start accepts. Automaton has 2312 states and 5643 transitions. Word has length 49 [2024-11-09 07:09:25,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:09:25,606 INFO L471 AbstractCegarLoop]: Abstraction has 2312 states and 5643 transitions. [2024-11-09 07:09:25,606 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.52) internal successors, (138), 25 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:09:25,607 INFO L276 IsEmpty]: Start isEmpty. Operand 2312 states and 5643 transitions. [2024-11-09 07:09:25,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-09 07:09:25,612 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:09:25,612 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:09:25,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1acf3-c8b7-4096-b9b3-28dca485d0b9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-09 07:09:25,813 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1acf3-c8b7-4096-b9b3-28dca485d0b9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:09:25,813 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-09 07:09:25,814 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:09:25,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1351576622, now seen corresponding path program 1 times [2024-11-09 07:09:25,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:09:25,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752169598] [2024-11-09 07:09:25,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:09:25,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:09:25,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:09:26,434 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:09:26,434 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:09:26,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752169598] [2024-11-09 07:09:26,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752169598] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:09:26,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467959574] [2024-11-09 07:09:26,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:09:26,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:09:26,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1acf3-c8b7-4096-b9b3-28dca485d0b9/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:09:26,437 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1acf3-c8b7-4096-b9b3-28dca485d0b9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:09:26,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1acf3-c8b7-4096-b9b3-28dca485d0b9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 07:09:26,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:09:26,618 INFO L255 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-09 07:09:26,626 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:09:26,659 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 07:09:26,725 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 07:09:26,813 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 07:09:27,214 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 2 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:09:27,215 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:09:27,368 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 12 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:09:27,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467959574] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:09:27,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1394323338] [2024-11-09 07:09:27,369 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:311) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:286) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:251) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:118) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:236) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-09 07:09:27,370 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:09:27,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 7] total 18 [2024-11-09 07:09:27,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712062930] [2024-11-09 07:09:27,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:09:27,372 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-09 07:09:27,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:09:27,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-09 07:09:27,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2024-11-09 07:09:27,373 INFO L87 Difference]: Start difference. First operand 2312 states and 5643 transitions. Second operand has 18 states, 18 states have (on average 9.055555555555555) internal successors, (163), 18 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:09:29,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:09:29,365 INFO L93 Difference]: Finished difference Result 4224 states and 10119 transitions. [2024-11-09 07:09:29,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-09 07:09:29,366 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 9.055555555555555) internal successors, (163), 18 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2024-11-09 07:09:29,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:09:29,381 INFO L225 Difference]: With dead ends: 4224 [2024-11-09 07:09:29,381 INFO L226 Difference]: Without dead ends: 2495 [2024-11-09 07:09:29,386 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=374, Invalid=816, Unknown=0, NotChecked=0, Total=1190 [2024-11-09 07:09:29,388 INFO L432 NwaCegarLoop]: 58 mSDtfsCounter, 482 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 07:09:29,388 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [482 Valid, 490 Invalid, 771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 757 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 07:09:29,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2495 states. [2024-11-09 07:09:29,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2495 to 1975. [2024-11-09 07:09:29,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1975 states, 1971 states have (on average 2.385083713850837) internal successors, (4701), 1974 states have internal predecessors, (4701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:09:29,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1975 states to 1975 states and 4701 transitions. [2024-11-09 07:09:29,832 INFO L78 Accepts]: Start accepts. Automaton has 1975 states and 4701 transitions. Word has length 56 [2024-11-09 07:09:29,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:09:29,833 INFO L471 AbstractCegarLoop]: Abstraction has 1975 states and 4701 transitions. [2024-11-09 07:09:29,834 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 9.055555555555555) internal successors, (163), 18 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:09:29,834 INFO L276 IsEmpty]: Start isEmpty. Operand 1975 states and 4701 transitions. [2024-11-09 07:09:29,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-09 07:09:29,838 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:09:29,839 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:09:29,860 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1acf3-c8b7-4096-b9b3-28dca485d0b9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-09 07:09:30,042 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1acf3-c8b7-4096-b9b3-28dca485d0b9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-09 07:09:30,043 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-09 07:09:30,045 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:09:30,045 INFO L85 PathProgramCache]: Analyzing trace with hash 352535526, now seen corresponding path program 3 times [2024-11-09 07:09:30,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:09:30,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352669709] [2024-11-09 07:09:30,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:09:30,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:09:30,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:09:32,303 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 39 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:09:32,303 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:09:32,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352669709] [2024-11-09 07:09:32,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352669709] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:09:32,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981329389] [2024-11-09 07:09:32,304 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 07:09:32,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:09:32,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1acf3-c8b7-4096-b9b3-28dca485d0b9/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:09:32,307 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1acf3-c8b7-4096-b9b3-28dca485d0b9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:09:32,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1acf3-c8b7-4096-b9b3-28dca485d0b9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 07:09:32,564 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 07:09:32,564 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:09:32,566 INFO L255 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-09 07:09:32,574 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:09:32,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-09 07:09:32,726 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 50 [2024-11-09 07:09:32,734 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 72 [2024-11-09 07:09:32,757 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 21 [2024-11-09 07:09:33,068 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 95 [2024-11-09 07:09:33,088 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:09:33,088 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 111 [2024-11-09 07:09:33,116 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 69 [2024-11-09 07:09:33,961 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 237 treesize of output 185 [2024-11-09 07:09:33,969 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:09:33,970 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 185 treesize of output 175 [2024-11-09 07:09:34,046 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 177 treesize of output 118 [2024-11-09 07:09:42,305 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:09:42,305 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 455 treesize of output 207 [2024-11-09 07:09:42,394 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:09:42,394 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:09:44,471 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:09:44,472 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 12 [2024-11-09 07:09:44,513 INFO L349 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2024-11-09 07:09:44,515 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 118 treesize of output 93 [2024-11-09 07:09:44,661 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:09:44,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981329389] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:09:44,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1828129137] [2024-11-09 07:09:44,663 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:311) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:286) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:251) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:118) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:236) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-09 07:09:44,664 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:09:44,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2024-11-09 07:09:44,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354851178] [2024-11-09 07:09:44,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:09:44,665 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-09 07:09:44,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:09:44,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-09 07:09:44,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=655, Unknown=0, NotChecked=0, Total=812 [2024-11-09 07:09:44,667 INFO L87 Difference]: Start difference. First operand 1975 states and 4701 transitions. Second operand has 29 states, 29 states have (on average 6.551724137931035) internal successors, (190), 28 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:09:50,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:09:50,294 INFO L93 Difference]: Finished difference Result 3367 states and 7902 transitions. [2024-11-09 07:09:50,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-09 07:09:50,294 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 6.551724137931035) internal successors, (190), 28 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2024-11-09 07:09:50,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:09:50,302 INFO L225 Difference]: With dead ends: 3367 [2024-11-09 07:09:50,303 INFO L226 Difference]: Without dead ends: 1152 [2024-11-09 07:09:50,308 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=652, Invalid=2318, Unknown=0, NotChecked=0, Total=2970 [2024-11-09 07:09:50,309 INFO L432 NwaCegarLoop]: 63 mSDtfsCounter, 943 mSDsluCounter, 709 mSDsCounter, 0 mSdLazyCounter, 1420 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 943 SdHoareTripleChecker+Valid, 772 SdHoareTripleChecker+Invalid, 1482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-09 07:09:50,309 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [943 Valid, 772 Invalid, 1482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1420 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-09 07:09:50,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1152 states. [2024-11-09 07:09:50,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1152 to 1152. [2024-11-09 07:09:50,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1152 states, 1149 states have (on average 2.265448215839861) internal successors, (2603), 1151 states have internal predecessors, (2603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:09:50,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 2603 transitions. [2024-11-09 07:09:50,579 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 2603 transitions. Word has length 64 [2024-11-09 07:09:50,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:09:50,579 INFO L471 AbstractCegarLoop]: Abstraction has 1152 states and 2603 transitions. [2024-11-09 07:09:50,579 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 6.551724137931035) internal successors, (190), 28 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:09:50,580 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 2603 transitions. [2024-11-09 07:09:50,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-11-09 07:09:50,582 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:09:50,583 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:09:50,604 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1acf3-c8b7-4096-b9b3-28dca485d0b9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-09 07:09:50,786 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1acf3-c8b7-4096-b9b3-28dca485d0b9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:09:50,787 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-09 07:09:50,787 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:09:50,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1137475174, now seen corresponding path program 2 times [2024-11-09 07:09:50,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:09:50,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744314467] [2024-11-09 07:09:50,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:09:50,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:09:50,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:09:51,523 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 51 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:09:51,524 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:09:51,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744314467] [2024-11-09 07:09:51,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744314467] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:09:51,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597983397] [2024-11-09 07:09:51,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 07:09:51,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:09:51,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1acf3-c8b7-4096-b9b3-28dca485d0b9/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:09:51,526 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1acf3-c8b7-4096-b9b3-28dca485d0b9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:09:51,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1acf3-c8b7-4096-b9b3-28dca485d0b9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 07:09:51,899 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-09 07:09:51,900 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:09:51,903 INFO L255 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-09 07:09:51,916 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:09:51,939 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 07:09:52,014 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 07:09:52,080 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 07:09:52,135 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 07:09:52,907 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 2 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:09:52,908 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:09:53,089 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 16 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:09:53,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597983397] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:09:53,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1848343550] [2024-11-09 07:09:53,091 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:311) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:286) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:251) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:118) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:236) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-09 07:09:53,091 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:09:53,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 9] total 24 [2024-11-09 07:09:53,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362848029] [2024-11-09 07:09:53,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:09:53,092 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-09 07:09:53,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:09:53,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-09 07:09:53,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=373, Unknown=0, NotChecked=0, Total=552 [2024-11-09 07:09:53,093 INFO L87 Difference]: Start difference. First operand 1152 states and 2603 transitions. Second operand has 24 states, 24 states have (on average 8.666666666666666) internal successors, (208), 24 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:09:54,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:09:54,035 INFO L93 Difference]: Finished difference Result 1215 states and 2743 transitions. [2024-11-09 07:09:54,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-09 07:09:54,036 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 8.666666666666666) internal successors, (208), 24 states have internal predecessors, (208), 0 states have call successors, (0), 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 71 [2024-11-09 07:09:54,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:09:54,043 INFO L225 Difference]: With dead ends: 1215 [2024-11-09 07:09:54,043 INFO L226 Difference]: Without dead ends: 895 [2024-11-09 07:09:54,044 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 131 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=403, Invalid=787, Unknown=0, NotChecked=0, Total=1190 [2024-11-09 07:09:54,045 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 399 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 07:09:54,045 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [399 Valid, 338 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 07:09:54,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2024-11-09 07:09:54,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 832. [2024-11-09 07:09:54,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 832 states, 831 states have (on average 2.2418772563176894) internal successors, (1863), 831 states have internal predecessors, (1863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:09:54,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 1863 transitions. [2024-11-09 07:09:54,201 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 1863 transitions. Word has length 71 [2024-11-09 07:09:54,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:09:54,202 INFO L471 AbstractCegarLoop]: Abstraction has 832 states and 1863 transitions. [2024-11-09 07:09:54,202 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 8.666666666666666) internal successors, (208), 24 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:09:54,202 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 1863 transitions. [2024-11-09 07:09:54,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-11-09 07:09:54,205 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:09:54,205 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:09:54,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1acf3-c8b7-4096-b9b3-28dca485d0b9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-09 07:09:54,405 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1acf3-c8b7-4096-b9b3-28dca485d0b9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:09:54,406 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-09 07:09:54,406 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:09:54,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1942574930, now seen corresponding path program 4 times [2024-11-09 07:09:54,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:09:54,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969397632] [2024-11-09 07:09:54,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:09:54,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:09:54,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:09:56,908 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 68 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:09:56,908 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:09:56,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969397632] [2024-11-09 07:09:56,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969397632] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:09:56,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197958998] [2024-11-09 07:09:56,909 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 07:09:56,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:09:56,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1acf3-c8b7-4096-b9b3-28dca485d0b9/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:09:56,910 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1acf3-c8b7-4096-b9b3-28dca485d0b9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:09:56,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1acf3-c8b7-4096-b9b3-28dca485d0b9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 07:09:57,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:09:57,209 INFO L255 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-09 07:09:57,219 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:09:57,289 INFO L349 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2024-11-09 07:09:57,289 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2024-11-09 07:09:57,482 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 73 [2024-11-09 07:09:57,516 INFO L349 Elim1Store]: treesize reduction 105, result has 16.0 percent of original size [2024-11-09 07:09:57,517 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 73 treesize of output 96 [2024-11-09 07:09:57,628 INFO L349 Elim1Store]: treesize reduction 20, result has 50.0 percent of original size [2024-11-09 07:09:57,628 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 70 treesize of output 49 [2024-11-09 07:09:58,229 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 187 treesize of output 155 [2024-11-09 07:09:58,289 INFO L349 Elim1Store]: treesize reduction 175, result has 14.6 percent of original size [2024-11-09 07:09:58,290 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 155 treesize of output 144 [2024-11-09 07:09:58,456 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 18 [2024-11-09 07:10:01,067 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 539 treesize of output 447 [2024-11-09 07:10:01,162 INFO L349 Elim1Store]: treesize reduction 203, result has 15.1 percent of original size [2024-11-09 07:10:01,163 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 447 treesize of output 350 [2024-11-09 07:10:03,135 INFO L349 Elim1Store]: treesize reduction 184, result has 32.1 percent of original size [2024-11-09 07:10:03,136 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 20 case distinctions, treesize of input 840 treesize of output 627 [2024-11-09 07:10:14,976 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1489 treesize of output 1229 [2024-11-09 07:10:15,129 INFO L349 Elim1Store]: treesize reduction 300, result has 13.5 percent of original size [2024-11-09 07:10:15,129 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 36 case distinctions, treesize of input 1229 treesize of output 765 [2024-11-09 07:10:21,636 INFO L349 Elim1Store]: treesize reduction 169, result has 27.5 percent of original size [2024-11-09 07:10:21,636 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 18 case distinctions, treesize of input 1716 treesize of output 1342 [2024-11-09 07:11:19,305 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:11:19,305 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 911 treesize of output 407 [2024-11-09 07:11:19,448 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:11:19,448 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:11:23,545 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 4 proven. 134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:11:23,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197958998] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:11:23,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1727044077] [2024-11-09 07:11:23,546 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:311) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:286) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:251) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:118) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:236) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-09 07:11:23,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:11:23,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2024-11-09 07:11:23,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724611389] [2024-11-09 07:11:23,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:11:23,547 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-09 07:11:23,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:11:23,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-09 07:11:23,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=972, Unknown=0, NotChecked=0, Total=1190 [2024-11-09 07:11:23,549 INFO L87 Difference]: Start difference. First operand 832 states and 1863 transitions. Second operand has 35 states, 35 states have (on average 6.714285714285714) internal successors, (235), 34 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:11:33,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:11:33,852 INFO L93 Difference]: Finished difference Result 967 states and 2172 transitions. [2024-11-09 07:11:33,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-09 07:11:33,853 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 6.714285714285714) internal successors, (235), 34 states have internal predecessors, (235), 0 states have call successors, (0), 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 79 [2024-11-09 07:11:33,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:11:33,858 INFO L225 Difference]: With dead ends: 967 [2024-11-09 07:11:33,858 INFO L226 Difference]: Without dead ends: 0 [2024-11-09 07:11:33,859 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=483, Invalid=1967, Unknown=0, NotChecked=0, Total=2450 [2024-11-09 07:11:33,860 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 879 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 1796 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 879 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 1817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2024-11-09 07:11:33,860 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [879 Valid, 712 Invalid, 1817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1796 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2024-11-09 07:11:33,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-11-09 07:11:33,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-11-09 07:11:33,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:11:33,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-11-09 07:11:33,866 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 79 [2024-11-09 07:11:33,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:11:33,866 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-11-09 07:11:33,866 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 6.714285714285714) internal successors, (235), 34 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:11:33,866 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-11-09 07:11:33,866 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-11-09 07:11:33,869 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2024-11-09 07:11:33,869 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 6 remaining) [2024-11-09 07:11:33,869 INFO L782 garLoopResultBuilder]: Registering result SAFE for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2024-11-09 07:11:33,869 INFO L782 garLoopResultBuilder]: Registering result SAFE for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2024-11-09 07:11:33,870 INFO L782 garLoopResultBuilder]: Registering result SAFE for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2024-11-09 07:11:33,870 INFO L782 garLoopResultBuilder]: Registering result SAFE for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2024-11-09 07:11:33,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1acf3-c8b7-4096-b9b3-28dca485d0b9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-09 07:11:34,070 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1acf3-c8b7-4096-b9b3-28dca485d0b9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-09 07:11:34,073 INFO L407 BasicCegarLoop]: Path program histogram: [4, 3, 2, 1, 1, 1, 1, 1] [2024-11-09 07:11:34,077 INFO L239 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-11-09 07:11:34,077 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-09 07:11:34,080 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.11 07:11:34 BasicIcfg [2024-11-09 07:11:34,080 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-09 07:11:34,081 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-09 07:11:34,081 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-09 07:11:34,081 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-09 07:11:34,081 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 07:08:49" (3/4) ... [2024-11-09 07:11:34,083 INFO L142 WitnessPrinter]: Generating witness for correct program [2024-11-09 07:11:34,086 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure t1 [2024-11-09 07:11:34,087 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure t2 [2024-11-09 07:11:34,090 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 40 nodes and edges [2024-11-09 07:11:34,090 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2024-11-09 07:11:34,090 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2024-11-09 07:11:34,090 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-11-09 07:11:34,184 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1acf3-c8b7-4096-b9b3-28dca485d0b9/bin/utaipan-verify-YMUCfTKeje/witness.graphml [2024-11-09 07:11:34,187 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1acf3-c8b7-4096-b9b3-28dca485d0b9/bin/utaipan-verify-YMUCfTKeje/witness.yml [2024-11-09 07:11:34,187 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-09 07:11:34,188 INFO L158 Benchmark]: Toolchain (without parser) took 166993.49ms. Allocated memory was 159.4MB in the beginning and 1.7GB in the end (delta: 1.6GB). Free memory was 109.4MB in the beginning and 688.1MB in the end (delta: -578.7MB). Peak memory consumption was 982.6MB. Max. memory is 16.1GB. [2024-11-09 07:11:34,188 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 123.7MB. Free memory was 94.3MB in the beginning and 94.2MB in the end (delta: 29.7kB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-09 07:11:34,188 INFO L158 Benchmark]: CACSL2BoogieTranslator took 852.89ms. Allocated memory is still 159.4MB. Free memory was 108.9MB in the beginning and 76.5MB in the end (delta: 32.4MB). Peak memory consumption was 31.5MB. Max. memory is 16.1GB. [2024-11-09 07:11:34,188 INFO L158 Benchmark]: Boogie Procedure Inliner took 55.60ms. Allocated memory is still 159.4MB. Free memory was 76.5MB in the beginning and 73.7MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-09 07:11:34,188 INFO L158 Benchmark]: Boogie Preprocessor took 37.08ms. Allocated memory is still 159.4MB. Free memory was 73.7MB in the beginning and 71.9MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-09 07:11:34,189 INFO L158 Benchmark]: RCFGBuilder took 1054.23ms. Allocated memory is still 159.4MB. Free memory was 71.9MB in the beginning and 91.7MB in the end (delta: -19.8MB). Peak memory consumption was 13.5MB. Max. memory is 16.1GB. [2024-11-09 07:11:34,189 INFO L158 Benchmark]: TraceAbstraction took 164880.17ms. Allocated memory was 159.4MB in the beginning and 1.7GB in the end (delta: 1.6GB). Free memory was 91.0MB in the beginning and 692.3MB in the end (delta: -601.3MB). Peak memory consumption was 958.6MB. Max. memory is 16.1GB. [2024-11-09 07:11:34,189 INFO L158 Benchmark]: Witness Printer took 106.77ms. Allocated memory is still 1.7GB. Free memory was 692.3MB in the beginning and 688.1MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-11-09 07:11:34,190 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 123.7MB. Free memory was 94.3MB in the beginning and 94.2MB in the end (delta: 29.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 852.89ms. Allocated memory is still 159.4MB. Free memory was 108.9MB in the beginning and 76.5MB in the end (delta: 32.4MB). Peak memory consumption was 31.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 55.60ms. Allocated memory is still 159.4MB. Free memory was 76.5MB in the beginning and 73.7MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 37.08ms. Allocated memory is still 159.4MB. Free memory was 73.7MB in the beginning and 71.9MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 1054.23ms. Allocated memory is still 159.4MB. Free memory was 71.9MB in the beginning and 91.7MB in the end (delta: -19.8MB). Peak memory consumption was 13.5MB. Max. memory is 16.1GB. * TraceAbstraction took 164880.17ms. Allocated memory was 159.4MB in the beginning and 1.7GB in the end (delta: 1.6GB). Free memory was 91.0MB in the beginning and 692.3MB in the end (delta: -601.3MB). Peak memory consumption was 958.6MB. Max. memory is 16.1GB. * Witness Printer took 106.77ms. Allocated memory is still 1.7GB. Free memory was 692.3MB in the beginning and 688.1MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 941]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - PositiveResult [Line: 941]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 61 locations, 6 error locations. Started 1 CEGAR loops. OverallTime: 164.7s, OverallIterations: 14, TraceHistogramMax: 6, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.1s, AutomataDifference: 34.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 6927 SdHoareTripleChecker+Valid, 11.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 6927 mSDsluCounter, 5183 SdHoareTripleChecker+Invalid, 9.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 4554 mSDsCounter, 347 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 9176 IncrementalHoareTripleChecker+Invalid, 9523 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 347 mSolverCounterUnsat, 629 mSDtfsCounter, 9176 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1270 GetRequests, 886 SyntacticMatches, 5 SemanticMatches, 379 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3734 ImplicationChecksByTransitivity, 22.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=5658occurred in iteration=8, InterpolantAutomatonStates: 287, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 3.7s AutomataMinimizationTime, 14 MinimizatonAttempts, 13551 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 120.3s InterpolantComputationTime, 1063 NumberOfCodeBlocks, 1056 NumberOfCodeBlocksAsserted, 36 NumberOfCheckSat, 1493 ConstructedInterpolants, 20 QuantifiedInterpolants, 124623 SizeOfPredicates, 147 NumberOfNonLiveVariables, 2612 ConjunctsInSsa, 168 ConjunctsInUnsatCore, 35 InterpolantComputations, 4 PerfectInterpolantSequences, 412/1765 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-11-09 07:11:34,345 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1acf3-c8b7-4096-b9b3-28dca485d0b9/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE