./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_82-list_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9a849f68 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/config/GemCutterReach.xml -i ../sv-benchmarks/c/goblint-regression/28-race_reach_82-list_racefree.i -s /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/config/svcomp-Reach-32bit-GemCutter_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux --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 GemCutter --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6ac894f5c6207d1329786eb676509b79ca36f8c33f880cc59ffa30652ab92765 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-9a849f6-m [2024-10-25 15:52:49,981 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-25 15:52:50,060 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/config/svcomp-Reach-32bit-GemCutter_Default.epf [2024-10-25 15:52:50,065 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-25 15:52:50,065 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-25 15:52:50,094 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-25 15:52:50,094 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-25 15:52:50,095 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-25 15:52:50,095 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-25 15:52:50,096 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-25 15:52:50,096 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-25 15:52:50,097 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-25 15:52:50,097 INFO L153 SettingsManager]: * Use SBE=true [2024-10-25 15:52:50,098 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-25 15:52:50,098 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-25 15:52:50,098 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-25 15:52:50,099 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-25 15:52:50,099 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-25 15:52:50,099 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-25 15:52:50,100 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-25 15:52:50,100 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-25 15:52:50,101 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-25 15:52:50,101 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-25 15:52:50,102 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-25 15:52:50,102 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-25 15:52:50,102 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-25 15:52:50,103 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-25 15:52:50,103 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-25 15:52:50,103 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-25 15:52:50,104 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-25 15:52:50,104 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-10-25 15:52:50,105 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-25 15:52:50,105 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-25 15:52:50,105 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-25 15:52:50,106 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-25 15:52:50,106 INFO L153 SettingsManager]: * DFS Order used in POR=LOOP_LOCKSTEP [2024-10-25 15:52:50,106 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-25 15:52:50,106 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-25 15:52:50,107 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PARTIAL_ORDER_FA [2024-10-25 15:52:50,107 INFO L153 SettingsManager]: * CEGAR restart behaviour=ONE_CEGAR_PER_THREAD_INSTANCE [2024-10-25 15:52:50,107 INFO L153 SettingsManager]: * Partial Order Reduction in concurrent analysis=PERSISTENT_SLEEP_NEW_STATES_FIXEDORDER [2024-10-25 15:52:50,108 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> GemCutter Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6ac894f5c6207d1329786eb676509b79ca36f8c33f880cc59ffa30652ab92765 [2024-10-25 15:52:50,353 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-25 15:52:50,379 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-25 15:52:50,386 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-25 15:52:50,387 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-25 15:52:50,388 INFO L274 PluginConnector]: CDTParser initialized [2024-10-25 15:52:50,389 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_82-list_racefree.i [2024-10-25 15:52:51,913 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-25 15:52:52,168 INFO L384 CDTParser]: Found 1 translation units. [2024-10-25 15:52:52,169 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_82-list_racefree.i [2024-10-25 15:52:52,189 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/data/437149fe6/07f48fb1f4364e07b4a9842d473d1a63/FLAG6fdf7a5e6 [2024-10-25 15:52:52,482 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/data/437149fe6/07f48fb1f4364e07b4a9842d473d1a63 [2024-10-25 15:52:52,485 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-25 15:52:52,486 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-25 15:52:52,488 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-25 15:52:52,488 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-25 15:52:52,493 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-25 15:52:52,494 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 03:52:52" (1/1) ... [2024-10-25 15:52:52,495 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6146842d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 03:52:52, skipping insertion in model container [2024-10-25 15:52:52,495 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 03:52:52" (1/1) ... [2024-10-25 15:52:52,554 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-25 15:52:53,037 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_82-list_racefree.i[47038,47051] [2024-10-25 15:52:53,087 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-25 15:52:53,113 INFO L200 MainTranslator]: Completed pre-run [2024-10-25 15:52:53,167 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_82-list_racefree.i[47038,47051] [2024-10-25 15:52:53,180 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-25 15:52:53,278 INFO L204 MainTranslator]: Completed translation [2024-10-25 15:52:53,279 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 03:52:53 WrapperNode [2024-10-25 15:52:53,279 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-25 15:52:53,280 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-25 15:52:53,280 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-25 15:52:53,281 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-25 15:52:53,288 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 03:52:53" (1/1) ... [2024-10-25 15:52:53,309 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 03:52:53" (1/1) ... [2024-10-25 15:52:53,345 INFO L138 Inliner]: procedures = 279, calls = 67, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 222 [2024-10-25 15:52:53,349 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-25 15:52:53,350 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-25 15:52:53,350 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-25 15:52:53,350 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-25 15:52:53,357 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 03:52:53" (1/1) ... [2024-10-25 15:52:53,358 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 03:52:53" (1/1) ... [2024-10-25 15:52:53,366 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 03:52:53" (1/1) ... [2024-10-25 15:52:53,366 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 03:52:53" (1/1) ... [2024-10-25 15:52:53,376 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 03:52:53" (1/1) ... [2024-10-25 15:52:53,380 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 03:52:53" (1/1) ... [2024-10-25 15:52:53,383 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 03:52:53" (1/1) ... [2024-10-25 15:52:53,385 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 03:52:53" (1/1) ... [2024-10-25 15:52:53,393 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-25 15:52:53,394 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-25 15:52:53,394 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-25 15:52:53,394 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-25 15:52:53,395 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 03:52:53" (1/1) ... [2024-10-25 15:52:53,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-10-25 15:52:53,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2024-10-25 15:52:53,435 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-10-25 15:52:53,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-10-25 15:52:53,490 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-25 15:52:53,490 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2024-10-25 15:52:53,491 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2024-10-25 15:52:53,491 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2024-10-25 15:52:53,491 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-25 15:52:53,492 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-10-25 15:52:53,492 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-10-25 15:52:53,492 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2024-10-25 15:52:53,492 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2024-10-25 15:52:53,492 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-10-25 15:52:53,492 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-10-25 15:52:53,494 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-25 15:52:53,494 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-25 15:52:53,494 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2024-10-25 15:52:53,494 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-10-25 15:52:53,494 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-25 15:52:53,494 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-25 15:52:53,497 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-25 15:52:53,687 INFO L238 CfgBuilder]: Building ICFG [2024-10-25 15:52:53,689 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-25 15:52:54,035 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-25 15:52:54,036 INFO L287 CfgBuilder]: Performing block encoding [2024-10-25 15:52:54,277 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-25 15:52:54,279 INFO L314 CfgBuilder]: Removed 15 assume(true) statements. [2024-10-25 15:52:54,279 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 03:52:54 BoogieIcfgContainer [2024-10-25 15:52:54,279 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-25 15:52:54,282 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-25 15:52:54,282 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-25 15:52:54,286 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-25 15:52:54,286 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.10 03:52:52" (1/3) ... [2024-10-25 15:52:54,287 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f63ac1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 03:52:54, skipping insertion in model container [2024-10-25 15:52:54,287 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 03:52:53" (2/3) ... [2024-10-25 15:52:54,288 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f63ac1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 03:52:54, skipping insertion in model container [2024-10-25 15:52:54,288 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 03:52:54" (3/3) ... [2024-10-25 15:52:54,289 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_82-list_racefree.i [2024-10-25 15:52:54,306 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-25 15:52:54,307 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-25 15:52:54,307 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-25 15:52:54,377 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-10-25 15:52:54,425 INFO L100 denceProviderFactory]: Independence Relation #1: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-25 15:52:54,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2024-10-25 15:52:54,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2024-10-25 15:52:54,428 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2024-10-25 15:52:54,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (2)] Waiting until timeout for monitored process [2024-10-25 15:52:54,463 INFO L157 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 1 independence relations. [2024-10-25 15:52:54,472 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == t2_funThread1of1ForFork1 ======== [2024-10-25 15:52:54,478 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=PARTIAL_ORDER_FA, 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;@1b5a1865, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-25 15:52:54,478 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-25 15:52:58,208 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-25 15:52:58,212 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-25 15:52:58,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1732569662, now seen corresponding path program 1 times [2024-10-25 15:52:58,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-25 15:52:58,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392886682] [2024-10-25 15:52:58,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-25 15:52:58,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-25 15:52:58,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-25 15:52:58,682 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-25 15:52:58,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-25 15:52:58,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392886682] [2024-10-25 15:52:58,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392886682] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-25 15:52:58,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853952213] [2024-10-25 15:52:58,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-25 15:52:58,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-25 15:52:58,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2024-10-25 15:52:58,698 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-25 15:52:58,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-25 15:52:58,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-25 15:52:58,860 INFO L255 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-10-25 15:52:58,865 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-25 15:52:58,872 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-25 15:52:58,874 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-25 15:52:58,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853952213] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-25 15:52:58,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-25 15:52:58,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2024-10-25 15:52:58,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617874864] [2024-10-25 15:52:58,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-25 15:52:58,883 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-25 15:52:58,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-25 15:52:58,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-25 15:52:58,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-25 15:52:58,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-25 15:52:58,912 INFO L471 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2024-10-25 15:52:58,913 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-25 15:52:58,914 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2024-10-25 15:52:59,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-25 15:52:59,207 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-25 15:52:59,392 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-10-25 15:52:59,393 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-25 15:52:59,393 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-25 15:52:59,394 INFO L85 PathProgramCache]: Analyzing trace with hash 370530108, now seen corresponding path program 1 times [2024-10-25 15:52:59,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-25 15:52:59,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241242997] [2024-10-25 15:52:59,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-25 15:52:59,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-25 15:52:59,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-25 15:52:59,612 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-25 15:52:59,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-25 15:52:59,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241242997] [2024-10-25 15:52:59,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241242997] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-25 15:52:59,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580465136] [2024-10-25 15:52:59,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-25 15:52:59,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-25 15:52:59,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2024-10-25 15:52:59,616 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-25 15:52:59,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-25 15:52:59,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-25 15:52:59,780 INFO L255 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-25 15:52:59,783 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-25 15:52:59,806 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-25 15:52:59,807 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-25 15:52:59,834 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-25 15:52:59,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580465136] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-25 15:52:59,834 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-25 15:52:59,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-10-25 15:52:59,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598577438] [2024-10-25 15:52:59,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-25 15:52:59,836 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-25 15:52:59,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-25 15:52:59,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-25 15:52:59,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-25 15:52:59,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-25 15:52:59,839 INFO L471 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2024-10-25 15:52:59,840 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-25 15:52:59,840 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2024-10-25 15:52:59,840 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2024-10-25 15:53:03,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-25 15:53:03,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-25 15:53:03,441 INFO L782 garLoopResultBuilder]: Registering result SAFE for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-10-25 15:53:03,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-25 15:53:03,642 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,4 /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-25 15:53:03,647 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1] [2024-10-25 15:53:03,649 INFO L312 ceAbstractionStarter]: Result for error location t2_funThread1of1ForFork1 was SAFE (1/2) [2024-10-25 15:53:03,653 INFO L100 denceProviderFactory]: Independence Relation #1: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-25 15:53:03,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2024-10-25 15:53:03,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2024-10-25 15:53:03,655 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2024-10-25 15:53:03,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (5)] Waiting until timeout for monitored process [2024-10-25 15:53:03,660 INFO L157 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 1 independence relations. [2024-10-25 15:53:03,660 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ======== [2024-10-25 15:53:03,660 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=PARTIAL_ORDER_FA, 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;@1b5a1865, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-25 15:53:03,661 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-10-25 15:53:05,397 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-25 15:53:05,398 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-25 15:53:05,398 INFO L85 PathProgramCache]: Analyzing trace with hash -182464637, now seen corresponding path program 1 times [2024-10-25 15:53:05,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-25 15:53:05,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111220510] [2024-10-25 15:53:05,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-25 15:53:05,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-25 15:53:05,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-25 15:53:05,447 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-25 15:53:05,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-25 15:53:05,530 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-25 15:53:05,530 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-25 15:53:05,530 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2024-10-25 15:53:05,531 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2024-10-25 15:53:05,531 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-25 15:53:05,532 INFO L407 BasicCegarLoop]: Path program histogram: [1] [2024-10-25 15:53:05,533 INFO L312 ceAbstractionStarter]: Result for error location ULTIMATE.start was UNSAFE,UNKNOWN (2/2) [2024-10-25 15:53:05,534 WARN L239 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-25 15:53:05,534 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-10-25 15:53:05,586 INFO L143 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2024-10-25 15:53:05,592 INFO L100 denceProviderFactory]: Independence Relation #1: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-25 15:53:05,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2024-10-25 15:53:05,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2024-10-25 15:53:05,596 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2024-10-25 15:53:05,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (6)] Waiting until timeout for monitored process [2024-10-25 15:53:05,598 INFO L157 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 1 independence relations. [2024-10-25 15:53:05,598 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == t2_funThread1of2ForFork1 ======== [2024-10-25 15:53:05,599 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=PARTIAL_ORDER_FA, 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;@1b5a1865, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-25 15:53:05,599 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-25 15:53:22,402 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-25 15:53:22,402 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-25 15:53:22,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1312157255, now seen corresponding path program 1 times [2024-10-25 15:53:22,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-25 15:53:22,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982816258] [2024-10-25 15:53:22,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-25 15:53:22,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-25 15:53:22,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-25 15:53:22,502 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-25 15:53:22,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-25 15:53:22,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982816258] [2024-10-25 15:53:22,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982816258] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-25 15:53:22,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-25 15:53:22,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-25 15:53:22,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845137284] [2024-10-25 15:53:22,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-25 15:53:22,505 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-25 15:53:22,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-25 15:53:22,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-25 15:53:22,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-25 15:53:22,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-25 15:53:22,507 INFO L471 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2024-10-25 15:53:22,507 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 25.5) internal successors, (51), 2 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-25 15:53:22,507 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2024-10-25 15:53:44,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-25 15:53:44,294 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-25 15:53:44,294 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-25 15:53:44,295 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-25 15:53:44,295 INFO L85 PathProgramCache]: Analyzing trace with hash 752418532, now seen corresponding path program 1 times [2024-10-25 15:53:44,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-25 15:53:44,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384819438] [2024-10-25 15:53:44,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-25 15:53:44,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-25 15:53:44,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-25 15:53:44,459 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-25 15:53:44,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-25 15:53:44,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384819438] [2024-10-25 15:53:44,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384819438] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-25 15:53:44,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840036919] [2024-10-25 15:53:44,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-25 15:53:44,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-25 15:53:44,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2024-10-25 15:53:44,463 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-25 15:53:44,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-25 15:53:44,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-25 15:53:44,767 INFO L255 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-25 15:53:44,769 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-25 15:53:44,804 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-25 15:53:44,804 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-25 15:53:44,847 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-25 15:53:44,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840036919] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-25 15:53:44,847 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-25 15:53:44,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-10-25 15:53:44,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490871835] [2024-10-25 15:53:44,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-25 15:53:44,849 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-25 15:53:44,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-25 15:53:44,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-25 15:53:44,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-10-25 15:53:44,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-25 15:53:44,850 INFO L471 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2024-10-25 15:53:44,850 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-25 15:53:44,851 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2024-10-25 15:53:44,851 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2024-10-25 15:53:57,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-25 15:53:57,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-25 15:53:57,067 INFO L782 garLoopResultBuilder]: Registering result SAFE for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-10-25 15:53:57,085 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-25 15:53:57,267 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,7 /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-25 15:53:57,269 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1] [2024-10-25 15:53:57,269 INFO L312 ceAbstractionStarter]: Result for error location t2_funThread1of2ForFork1 was SAFE (1/3) [2024-10-25 15:53:57,271 INFO L100 denceProviderFactory]: Independence Relation #1: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-25 15:53:57,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2024-10-25 15:53:57,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2024-10-25 15:53:57,273 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2024-10-25 15:53:57,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (8)] Waiting until timeout for monitored process [2024-10-25 15:53:57,276 INFO L157 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 1 independence relations. [2024-10-25 15:53:57,276 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ======== [2024-10-25 15:53:57,277 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=PARTIAL_ORDER_FA, 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;@1b5a1865, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-25 15:53:57,277 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-10-25 15:54:10,140 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-25 15:54:10,141 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-25 15:54:10,141 INFO L85 PathProgramCache]: Analyzing trace with hash -806026311, now seen corresponding path program 1 times [2024-10-25 15:54:10,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-25 15:54:10,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069870318] [2024-10-25 15:54:10,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-25 15:54:10,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-25 15:54:10,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-25 15:54:10,204 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-25 15:54:10,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-25 15:54:10,278 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-25 15:54:10,278 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-25 15:54:10,279 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2024-10-25 15:54:10,279 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2024-10-25 15:54:10,279 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-25 15:54:10,281 INFO L407 BasicCegarLoop]: Path program histogram: [1] [2024-10-25 15:54:10,282 INFO L312 ceAbstractionStarter]: Result for error location ULTIMATE.start was UNSAFE,UNKNOWN (2/3) [2024-10-25 15:54:10,282 WARN L239 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-25 15:54:10,282 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-10-25 15:54:10,339 INFO L143 ThreadInstanceAdder]: Constructed 12 joinOtherThreadTransitions. [2024-10-25 15:54:10,344 INFO L100 denceProviderFactory]: Independence Relation #1: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-25 15:54:10,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2024-10-25 15:54:10,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2024-10-25 15:54:10,347 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2024-10-25 15:54:10,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (9)] Waiting until timeout for monitored process [2024-10-25 15:54:10,352 INFO L157 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 1 independence relations. [2024-10-25 15:54:10,352 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == t2_funThread3of3ForFork1 ======== [2024-10-25 15:54:10,353 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=PARTIAL_ORDER_FA, 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;@1b5a1865, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-25 15:54:10,353 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-25 15:54:43,724 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-25 15:54:43,725 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-25 15:54:43,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1283160752, now seen corresponding path program 1 times [2024-10-25 15:54:43,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-25 15:54:43,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896219649] [2024-10-25 15:54:43,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-25 15:54:43,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-25 15:54:43,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-25 15:54:43,828 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-10-25 15:54:43,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-25 15:54:43,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896219649] [2024-10-25 15:54:43,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896219649] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-25 15:54:43,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-25 15:54:43,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-25 15:54:43,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166828698] [2024-10-25 15:54:43,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-25 15:54:43,835 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-25 15:54:43,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-25 15:54:43,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-25 15:54:43,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-25 15:54:43,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-25 15:54:43,836 INFO L471 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2024-10-25 15:54:43,836 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 33.0) internal successors, (66), 2 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-25 15:54:43,836 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2024-10-25 15:54:48,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-25 15:54:48,802 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-25 15:54:48,802 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-25 15:54:48,803 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-25 15:54:48,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1262607217, now seen corresponding path program 1 times [2024-10-25 15:54:48,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-25 15:54:48,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404233428] [2024-10-25 15:54:48,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-25 15:54:48,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-25 15:54:48,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-25 15:54:49,012 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-25 15:54:49,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-25 15:54:49,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404233428] [2024-10-25 15:54:49,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404233428] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-25 15:54:49,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968404349] [2024-10-25 15:54:49,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-25 15:54:49,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-25 15:54:49,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2024-10-25 15:54:49,015 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-25 15:54:49,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-25 15:54:49,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-25 15:54:49,307 INFO L255 TraceCheckSpWp]: Trace formula consists of 881 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-25 15:54:49,310 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-25 15:54:49,346 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-25 15:54:49,347 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-25 15:54:49,409 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-25 15:54:49,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968404349] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-25 15:54:49,413 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-25 15:54:49,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-10-25 15:54:49,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989654492] [2024-10-25 15:54:49,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-25 15:54:49,414 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-25 15:54:49,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-25 15:54:49,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-25 15:54:49,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2024-10-25 15:54:49,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-25 15:54:49,415 INFO L471 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2024-10-25 15:54:49,415 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-25 15:54:49,416 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2024-10-25 15:54:49,416 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2024-10-25 15:55:17,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-25 15:55:17,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-25 15:55:17,315 INFO L782 garLoopResultBuilder]: Registering result SAFE for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-10-25 15:55:17,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-25 15:55:17,515 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,10 /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-25 15:55:17,517 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1] [2024-10-25 15:55:17,517 INFO L312 ceAbstractionStarter]: Result for error location t2_funThread3of3ForFork1 was SAFE (1/4) [2024-10-25 15:55:17,519 INFO L100 denceProviderFactory]: Independence Relation #1: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-25 15:55:17,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2024-10-25 15:55:17,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2024-10-25 15:55:17,521 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2024-10-25 15:55:17,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (11)] Waiting until timeout for monitored process [2024-10-25 15:55:17,526 INFO L157 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 1 independence relations. [2024-10-25 15:55:17,526 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == t2_funThread1of3ForFork1 ======== [2024-10-25 15:55:17,526 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=PARTIAL_ORDER_FA, 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;@1b5a1865, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-25 15:55:17,527 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-25 15:55:59,337 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-25 15:55:59,337 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-25 15:55:59,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1719685241, now seen corresponding path program 1 times [2024-10-25 15:55:59,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-25 15:55:59,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506584393] [2024-10-25 15:55:59,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-25 15:55:59,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-25 15:55:59,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-25 15:55:59,418 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-10-25 15:55:59,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-25 15:55:59,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506584393] [2024-10-25 15:55:59,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506584393] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-25 15:55:59,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-25 15:55:59,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-25 15:55:59,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641718813] [2024-10-25 15:55:59,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-25 15:55:59,420 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-25 15:55:59,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-25 15:55:59,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-25 15:55:59,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-25 15:55:59,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-25 15:55:59,421 INFO L471 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2024-10-25 15:55:59,422 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 34.5) internal successors, (69), 2 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-25 15:55:59,422 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. Killed by 15