./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_87-lists_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_277565bc-c900-41dc-9b64-ad4cac00e5b2/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_277565bc-c900-41dc-9b64-ad4cac00e5b2/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_277565bc-c900-41dc-9b64-ad4cac00e5b2/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_277565bc-c900-41dc-9b64-ad4cac00e5b2/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_87-lists_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_277565bc-c900-41dc-9b64-ad4cac00e5b2/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_277565bc-c900-41dc-9b64-ad4cac00e5b2/bin/uautomizer-verify-VRDe98Ueme --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7be9b237ca4111a24c77c67cce26f31a788af03984af96dee7353f79c789c2c1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:57:01,292 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:57:01,413 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_277565bc-c900-41dc-9b64-ad4cac00e5b2/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 11:57:01,421 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:57:01,422 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:57:01,459 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:57:01,461 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:57:01,461 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:57:01,462 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:57:01,467 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:57:01,468 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:57:01,468 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:57:01,469 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:57:01,471 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:57:01,471 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:57:01,472 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:57:01,473 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:57:01,473 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:57:01,474 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:57:01,474 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:57:01,475 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:57:01,475 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:57:01,476 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:57:01,476 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:57:01,477 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:57:01,477 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:57:01,478 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:57:01,479 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:57:01,479 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:57:01,480 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:57:01,481 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:57:01,482 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:57:01,482 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:57:01,482 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:57:01,483 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:57:01,483 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:57:01,483 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:57:01,484 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:57:01,484 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:57:01,484 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:57:01,485 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:57:01,485 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:57:01,485 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_277565bc-c900-41dc-9b64-ad4cac00e5b2/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_277565bc-c900-41dc-9b64-ad4cac00e5b2/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7be9b237ca4111a24c77c67cce26f31a788af03984af96dee7353f79c789c2c1 [2023-11-26 11:57:01,778 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:57:01,813 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:57:01,815 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:57:01,817 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:57:01,817 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:57:01,819 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_277565bc-c900-41dc-9b64-ad4cac00e5b2/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/goblint-regression/28-race_reach_87-lists_racefree.i [2023-11-26 11:57:04,952 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:57:05,342 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:57:05,344 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_277565bc-c900-41dc-9b64-ad4cac00e5b2/sv-benchmarks/c/goblint-regression/28-race_reach_87-lists_racefree.i [2023-11-26 11:57:05,370 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_277565bc-c900-41dc-9b64-ad4cac00e5b2/bin/uautomizer-verify-VRDe98Ueme/data/30373be1e/f5ec447a5daf46f1899eca07c2fb9f8b/FLAG9db067189 [2023-11-26 11:57:05,386 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_277565bc-c900-41dc-9b64-ad4cac00e5b2/bin/uautomizer-verify-VRDe98Ueme/data/30373be1e/f5ec447a5daf46f1899eca07c2fb9f8b [2023-11-26 11:57:05,392 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:57:05,394 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:57:05,398 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:57:05,399 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:57:05,406 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:57:05,407 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:57:05" (1/1) ... [2023-11-26 11:57:05,408 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5aefd153 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:05, skipping insertion in model container [2023-11-26 11:57:05,408 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:57:05" (1/1) ... [2023-11-26 11:57:05,467 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:57:05,944 WARN L240 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_277565bc-c900-41dc-9b64-ad4cac00e5b2/sv-benchmarks/c/goblint-regression/28-race_reach_87-lists_racefree.i[47038,47051] [2023-11-26 11:57:05,985 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:57:06,097 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:57:06,169 WARN L240 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_277565bc-c900-41dc-9b64-ad4cac00e5b2/sv-benchmarks/c/goblint-regression/28-race_reach_87-lists_racefree.i[47038,47051] [2023-11-26 11:57:06,186 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:57:06,270 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:57:06,271 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:06 WrapperNode [2023-11-26 11:57:06,271 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:57:06,273 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:57:06,273 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:57:06,273 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:57:06,282 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:06" (1/1) ... [2023-11-26 11:57:06,322 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:06" (1/1) ... [2023-11-26 11:57:06,393 INFO L138 Inliner]: procedures = 279, calls = 68, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 258 [2023-11-26 11:57:06,394 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:57:06,394 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:57:06,395 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:57:06,395 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:57:06,411 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:06" (1/1) ... [2023-11-26 11:57:06,412 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:06" (1/1) ... [2023-11-26 11:57:06,431 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:06" (1/1) ... [2023-11-26 11:57:06,487 INFO L175 MemorySlicer]: Split 35 memory accesses to 8 slices as follows [2, 5, 2, 4, 5, 1, 14, 2]. 40 percent of accesses are in the largest equivalence class. The 12 initializations are split as follows [2, 5, 0, 0, 5, 0, 0, 0]. The 13 writes are split as follows [0, 0, 1, 2, 0, 1, 8, 1]. [2023-11-26 11:57:06,488 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:06" (1/1) ... [2023-11-26 11:57:06,488 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:06" (1/1) ... [2023-11-26 11:57:06,510 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:06" (1/1) ... [2023-11-26 11:57:06,531 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:06" (1/1) ... [2023-11-26 11:57:06,535 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:06" (1/1) ... [2023-11-26 11:57:06,538 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:06" (1/1) ... [2023-11-26 11:57:06,545 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:57:06,546 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:57:06,546 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:57:06,546 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:57:06,547 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:06" (1/1) ... [2023-11-26 11:57:06,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:57:06,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_277565bc-c900-41dc-9b64-ad4cac00e5b2/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:57:06,585 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_277565bc-c900-41dc-9b64-ad4cac00e5b2/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:57:06,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_277565bc-c900-41dc-9b64-ad4cac00e5b2/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:57:06,637 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 11:57:06,638 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-26 11:57:06,638 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-26 11:57:06,638 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-26 11:57:06,638 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2023-11-26 11:57:06,639 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#4 [2023-11-26 11:57:06,639 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#5 [2023-11-26 11:57:06,641 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#6 [2023-11-26 11:57:06,641 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#7 [2023-11-26 11:57:06,642 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2023-11-26 11:57:06,642 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2023-11-26 11:57:06,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 11:57:06,642 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-26 11:57:06,643 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 11:57:06,643 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 11:57:06,643 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 11:57:06,643 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-26 11:57:06,644 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-26 11:57:06,644 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2023-11-26 11:57:06,645 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2023-11-26 11:57:06,646 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2023-11-26 11:57:06,646 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2023-11-26 11:57:06,646 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2023-11-26 11:57:06,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 11:57:06,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 11:57:06,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 11:57:06,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-26 11:57:06,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-26 11:57:06,649 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2023-11-26 11:57:06,650 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2023-11-26 11:57:06,650 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2023-11-26 11:57:06,650 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-26 11:57:06,650 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-26 11:57:06,651 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:57:06,651 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-26 11:57:06,651 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-26 11:57:06,651 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-26 11:57:06,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2023-11-26 11:57:06,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#4 [2023-11-26 11:57:06,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#5 [2023-11-26 11:57:06,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#6 [2023-11-26 11:57:06,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#7 [2023-11-26 11:57:06,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:57:06,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 11:57:06,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 11:57:06,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-26 11:57:06,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-26 11:57:06,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-26 11:57:06,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2023-11-26 11:57:06,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2023-11-26 11:57:06,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:57:06,655 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:57:06,657 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-26 11:57:06,934 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:57:06,936 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:57:07,537 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:57:07,968 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:57:07,968 INFO L309 CfgBuilder]: Removed 16 assume(true) statements. [2023-11-26 11:57:07,970 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:57:07 BoogieIcfgContainer [2023-11-26 11:57:07,970 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:57:07,975 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:57:07,975 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:57:07,979 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:57:07,979 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:57:05" (1/3) ... [2023-11-26 11:57:07,980 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c3aadca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:57:07, skipping insertion in model container [2023-11-26 11:57:07,980 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:06" (2/3) ... [2023-11-26 11:57:07,983 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c3aadca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:57:07, skipping insertion in model container [2023-11-26 11:57:07,983 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:57:07" (3/3) ... [2023-11-26 11:57:07,985 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_87-lists_racefree.i [2023-11-26 11:57:07,997 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-26 11:57:08,010 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:57:08,011 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 11:57:08,011 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-26 11:57:08,117 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-26 11:57:08,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 63 places, 77 transitions, 174 flow [2023-11-26 11:57:08,294 INFO L124 PetriNetUnfolderBase]: 37/157 cut-off events. [2023-11-26 11:57:08,294 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-11-26 11:57:08,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174 conditions, 157 events. 37/157 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 581 event pairs, 0 based on Foata normal form. 0/112 useless extension candidates. Maximal degree in co-relation 80. Up to 8 conditions per place. [2023-11-26 11:57:08,307 INFO L82 GeneralOperation]: Start removeDead. Operand has 63 places, 77 transitions, 174 flow [2023-11-26 11:57:08,318 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 63 places, 75 transitions, 164 flow [2023-11-26 11:57:08,334 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:57:08,344 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=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;@b643443, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:57:08,344 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-26 11:57:08,361 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 11:57:08,361 INFO L124 PetriNetUnfolderBase]: 1/21 cut-off events. [2023-11-26 11:57:08,361 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-26 11:57:08,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:57:08,363 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-11-26 11:57:08,364 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-26 11:57:08,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:08,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1677417540, now seen corresponding path program 1 times [2023-11-26 11:57:08,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:08,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980185174] [2023-11-26 11:57:08,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:08,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:08,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:08,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 11:57:08,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:08,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980185174] [2023-11-26 11:57:08,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980185174] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:57:08,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:57:08,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:57:08,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897482074] [2023-11-26 11:57:08,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:57:08,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:57:08,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:08,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:57:08,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:57:08,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 77 [2023-11-26 11:57:08,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 75 transitions, 164 flow. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 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) [2023-11-26 11:57:08,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:57:08,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 77 [2023-11-26 11:57:08,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:57:10,085 INFO L124 PetriNetUnfolderBase]: 2345/4510 cut-off events. [2023-11-26 11:57:10,086 INFO L125 PetriNetUnfolderBase]: For 134/134 co-relation queries the response was YES. [2023-11-26 11:57:10,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8332 conditions, 4510 events. 2345/4510 cut-off events. For 134/134 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 27494 event pairs, 2178 based on Foata normal form. 406/4208 useless extension candidates. Maximal degree in co-relation 7099. Up to 3752 conditions per place. [2023-11-26 11:57:10,124 INFO L140 encePairwiseOnDemand]: 62/77 looper letters, 47 selfloop transitions, 2 changer transitions 0/64 dead transitions. [2023-11-26 11:57:10,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 64 transitions, 240 flow [2023-11-26 11:57:10,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:57:10,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:57:10,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 107 transitions. [2023-11-26 11:57:10,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46320346320346323 [2023-11-26 11:57:10,140 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 107 transitions. [2023-11-26 11:57:10,141 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 107 transitions. [2023-11-26 11:57:10,142 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:57:10,145 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 107 transitions. [2023-11-26 11:57:10,149 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 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) [2023-11-26 11:57:10,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 77.0) internal successors, (308), 4 states have internal predecessors, (308), 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) [2023-11-26 11:57:10,157 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 77.0) internal successors, (308), 4 states have internal predecessors, (308), 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) [2023-11-26 11:57:10,160 INFO L175 Difference]: Start difference. First operand has 63 places, 75 transitions, 164 flow. Second operand 3 states and 107 transitions. [2023-11-26 11:57:10,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 64 transitions, 240 flow [2023-11-26 11:57:10,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 64 transitions, 240 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-26 11:57:10,176 INFO L231 Difference]: Finished difference. Result has 66 places, 64 transitions, 152 flow [2023-11-26 11:57:10,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=66, PETRI_TRANSITIONS=64} [2023-11-26 11:57:10,184 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 3 predicate places. [2023-11-26 11:57:10,185 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 64 transitions, 152 flow [2023-11-26 11:57:10,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 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) [2023-11-26 11:57:10,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:57:10,186 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-11-26 11:57:10,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 11:57:10,186 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-26 11:57:10,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:10,188 INFO L85 PathProgramCache]: Analyzing trace with hash 457770936, now seen corresponding path program 1 times [2023-11-26 11:57:10,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:10,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103846867] [2023-11-26 11:57:10,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:10,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:10,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:10,442 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 11:57:10,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:10,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103846867] [2023-11-26 11:57:10,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103846867] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:57:10,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160257233] [2023-11-26 11:57:10,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:10,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:10,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_277565bc-c900-41dc-9b64-ad4cac00e5b2/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:57:10,456 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_277565bc-c900-41dc-9b64-ad4cac00e5b2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:57:10,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_277565bc-c900-41dc-9b64-ad4cac00e5b2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:57:10,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:10,679 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 11:57:10,684 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:57:10,724 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 11:57:10,724 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:57:10,747 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 11:57:10,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160257233] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:57:10,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:57:10,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-11-26 11:57:10,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212748921] [2023-11-26 11:57:10,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:57:10,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 11:57:10,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:10,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 11:57:10,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:57:10,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 77 [2023-11-26 11:57:10,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 64 transitions, 152 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 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) [2023-11-26 11:57:10,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:57:10,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 77 [2023-11-26 11:57:10,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:57:11,637 INFO L124 PetriNetUnfolderBase]: 2345/4513 cut-off events. [2023-11-26 11:57:11,637 INFO L125 PetriNetUnfolderBase]: For 134/134 co-relation queries the response was YES. [2023-11-26 11:57:11,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8348 conditions, 4513 events. 2345/4513 cut-off events. For 134/134 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 27472 event pairs, 2178 based on Foata normal form. 0/3805 useless extension candidates. Maximal degree in co-relation 8335. Up to 3752 conditions per place. [2023-11-26 11:57:11,670 INFO L140 encePairwiseOnDemand]: 74/77 looper letters, 47 selfloop transitions, 5 changer transitions 0/67 dead transitions. [2023-11-26 11:57:11,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 67 transitions, 268 flow [2023-11-26 11:57:11,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:57:11,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 11:57:11,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2023-11-26 11:57:11,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31385281385281383 [2023-11-26 11:57:11,674 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 145 transitions. [2023-11-26 11:57:11,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 145 transitions. [2023-11-26 11:57:11,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:57:11,675 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 145 transitions. [2023-11-26 11:57:11,676 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 24.166666666666668) internal successors, (145), 6 states have internal predecessors, (145), 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) [2023-11-26 11:57:11,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 77.0) internal successors, (539), 7 states have internal predecessors, (539), 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) [2023-11-26 11:57:11,679 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 77.0) internal successors, (539), 7 states have internal predecessors, (539), 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) [2023-11-26 11:57:11,679 INFO L175 Difference]: Start difference. First operand has 66 places, 64 transitions, 152 flow. Second operand 6 states and 145 transitions. [2023-11-26 11:57:11,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 67 transitions, 268 flow [2023-11-26 11:57:11,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 67 transitions, 264 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-26 11:57:11,685 INFO L231 Difference]: Finished difference. Result has 73 places, 67 transitions, 184 flow [2023-11-26 11:57:11,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=184, PETRI_PLACES=73, PETRI_TRANSITIONS=67} [2023-11-26 11:57:11,686 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 10 predicate places. [2023-11-26 11:57:11,687 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 67 transitions, 184 flow [2023-11-26 11:57:11,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 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) [2023-11-26 11:57:11,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:57:11,688 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-11-26 11:57:11,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_277565bc-c900-41dc-9b64-ad4cac00e5b2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 11:57:11,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_277565bc-c900-41dc-9b64-ad4cac00e5b2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:11,900 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-26 11:57:11,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:11,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1614505660, now seen corresponding path program 2 times [2023-11-26 11:57:11,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:11,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262041444] [2023-11-26 11:57:11,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:11,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:12,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:12,282 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 11:57:12,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:12,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262041444] [2023-11-26 11:57:12,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262041444] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:57:12,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184325706] [2023-11-26 11:57:12,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:57:12,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:12,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_277565bc-c900-41dc-9b64-ad4cac00e5b2/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:57:12,286 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_277565bc-c900-41dc-9b64-ad4cac00e5b2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:57:12,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_277565bc-c900-41dc-9b64-ad4cac00e5b2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:57:12,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 11:57:12,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:57:12,549 INFO L262 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:57:12,551 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:57:12,568 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 11:57:12,569 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:57:12,637 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 11:57:12,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184325706] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:57:12,637 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:57:12,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-11-26 11:57:12,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247291707] [2023-11-26 11:57:12,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:57:12,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-26 11:57:12,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:12,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-26 11:57:12,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-11-26 11:57:12,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 77 [2023-11-26 11:57:12,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 67 transitions, 184 flow. Second operand has 12 states, 12 states have (on average 16.25) internal successors, (195), 12 states have internal predecessors, (195), 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) [2023-11-26 11:57:12,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:57:12,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 77 [2023-11-26 11:57:12,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:57:13,599 INFO L124 PetriNetUnfolderBase]: 2345/4519 cut-off events. [2023-11-26 11:57:13,599 INFO L125 PetriNetUnfolderBase]: For 154/154 co-relation queries the response was YES. [2023-11-26 11:57:13,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8385 conditions, 4519 events. 2345/4519 cut-off events. For 154/154 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 27472 event pairs, 2178 based on Foata normal form. 6/3818 useless extension candidates. Maximal degree in co-relation 8326. Up to 3752 conditions per place. [2023-11-26 11:57:13,635 INFO L140 encePairwiseOnDemand]: 74/77 looper letters, 47 selfloop transitions, 11 changer transitions 0/73 dead transitions. [2023-11-26 11:57:13,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 73 transitions, 336 flow [2023-11-26 11:57:13,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-26 11:57:13,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-26 11:57:13,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 244 transitions. [2023-11-26 11:57:13,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26406926406926406 [2023-11-26 11:57:13,639 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 244 transitions. [2023-11-26 11:57:13,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 244 transitions. [2023-11-26 11:57:13,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:57:13,641 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 244 transitions. [2023-11-26 11:57:13,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 20.333333333333332) internal successors, (244), 12 states have internal predecessors, (244), 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) [2023-11-26 11:57:13,649 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 77.0) internal successors, (1001), 13 states have internal predecessors, (1001), 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) [2023-11-26 11:57:13,650 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 77.0) internal successors, (1001), 13 states have internal predecessors, (1001), 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) [2023-11-26 11:57:13,650 INFO L175 Difference]: Start difference. First operand has 73 places, 67 transitions, 184 flow. Second operand 12 states and 244 transitions. [2023-11-26 11:57:13,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 73 transitions, 336 flow [2023-11-26 11:57:13,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 73 transitions, 322 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-26 11:57:13,660 INFO L231 Difference]: Finished difference. Result has 89 places, 73 transitions, 254 flow [2023-11-26 11:57:13,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=254, PETRI_PLACES=89, PETRI_TRANSITIONS=73} [2023-11-26 11:57:13,662 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 26 predicate places. [2023-11-26 11:57:13,662 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 73 transitions, 254 flow [2023-11-26 11:57:13,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 16.25) internal successors, (195), 12 states have internal predecessors, (195), 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) [2023-11-26 11:57:13,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:57:13,663 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-11-26 11:57:13,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_277565bc-c900-41dc-9b64-ad4cac00e5b2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 11:57:13,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_277565bc-c900-41dc-9b64-ad4cac00e5b2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:13,875 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-26 11:57:13,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:13,876 INFO L85 PathProgramCache]: Analyzing trace with hash 424035524, now seen corresponding path program 3 times [2023-11-26 11:57:13,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:13,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15359018] [2023-11-26 11:57:13,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:13,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:13,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:14,519 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 11:57:14,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:14,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15359018] [2023-11-26 11:57:14,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15359018] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:57:14,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641816664] [2023-11-26 11:57:14,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 11:57:14,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:14,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_277565bc-c900-41dc-9b64-ad4cac00e5b2/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:57:14,522 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_277565bc-c900-41dc-9b64-ad4cac00e5b2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:57:14,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_277565bc-c900-41dc-9b64-ad4cac00e5b2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process