./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 d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df61d2c8-cf49-41a1-8a4c-bbaa1068e064/bin/uautomizer-verify-84ZbGMXZE1/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df61d2c8-cf49-41a1-8a4c-bbaa1068e064/bin/uautomizer-verify-84ZbGMXZE1/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df61d2c8-cf49-41a1-8a4c-bbaa1068e064/bin/uautomizer-verify-84ZbGMXZE1/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df61d2c8-cf49-41a1-8a4c-bbaa1068e064/bin/uautomizer-verify-84ZbGMXZE1/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_df61d2c8-cf49-41a1-8a4c-bbaa1068e064/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df61d2c8-cf49-41a1-8a4c-bbaa1068e064/bin/uautomizer-verify-84ZbGMXZE1 --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 0.3.0-dev-d790fec [2024-12-02 07:41:08,457 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-12-02 07:41:08,511 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df61d2c8-cf49-41a1-8a4c-bbaa1068e064/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-12-02 07:41:08,515 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-12-02 07:41:08,515 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-12-02 07:41:08,536 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-12-02 07:41:08,536 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-12-02 07:41:08,537 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-12-02 07:41:08,537 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-12-02 07:41:08,537 INFO L153 SettingsManager]: * Use memory slicer=true [2024-12-02 07:41:08,537 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-12-02 07:41:08,537 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-12-02 07:41:08,538 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-12-02 07:41:08,538 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-12-02 07:41:08,538 INFO L153 SettingsManager]: * Use SBE=true [2024-12-02 07:41:08,538 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-12-02 07:41:08,538 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-12-02 07:41:08,538 INFO L153 SettingsManager]: * sizeof long=4 [2024-12-02 07:41:08,539 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-12-02 07:41:08,539 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-12-02 07:41:08,539 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-12-02 07:41:08,539 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-12-02 07:41:08,539 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-12-02 07:41:08,539 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-12-02 07:41:08,539 INFO L153 SettingsManager]: * sizeof long double=12 [2024-12-02 07:41:08,539 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-12-02 07:41:08,539 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-12-02 07:41:08,539 INFO L153 SettingsManager]: * Use constant arrays=true [2024-12-02 07:41:08,540 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-12-02 07:41:08,540 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 07:41:08,540 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 07:41:08,540 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 07:41:08,540 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 07:41:08,540 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-12-02 07:41:08,540 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 07:41:08,540 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 07:41:08,540 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 07:41:08,540 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 07:41:08,541 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-12-02 07:41:08,541 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-12-02 07:41:08,541 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-12-02 07:41:08,541 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-12-02 07:41:08,541 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-12-02 07:41:08,541 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-12-02 07:41:08,541 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-12-02 07:41:08,541 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-12-02 07:41:08,541 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-12-02 07:41:08,541 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-12-02 07:41:08,542 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_df61d2c8-cf49-41a1-8a4c-bbaa1068e064/bin/uautomizer-verify-84ZbGMXZE1 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 [2024-12-02 07:41:08,778 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-12-02 07:41:08,786 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-12-02 07:41:08,788 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-12-02 07:41:08,790 INFO L270 PluginConnector]: Initializing CDTParser... [2024-12-02 07:41:08,790 INFO L274 PluginConnector]: CDTParser initialized [2024-12-02 07:41:08,791 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df61d2c8-cf49-41a1-8a4c-bbaa1068e064/bin/uautomizer-verify-84ZbGMXZE1/../../sv-benchmarks/c/goblint-regression/28-race_reach_87-lists_racefree.i [2024-12-02 07:41:11,557 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df61d2c8-cf49-41a1-8a4c-bbaa1068e064/bin/uautomizer-verify-84ZbGMXZE1/data/0b30f8461/40c9cd7a14a1423a90e5eaf6d208db5e/FLAG72f7acdcf [2024-12-02 07:41:11,793 INFO L384 CDTParser]: Found 1 translation units. [2024-12-02 07:41:11,794 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df61d2c8-cf49-41a1-8a4c-bbaa1068e064/sv-benchmarks/c/goblint-regression/28-race_reach_87-lists_racefree.i [2024-12-02 07:41:11,806 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df61d2c8-cf49-41a1-8a4c-bbaa1068e064/bin/uautomizer-verify-84ZbGMXZE1/data/0b30f8461/40c9cd7a14a1423a90e5eaf6d208db5e/FLAG72f7acdcf [2024-12-02 07:41:12,108 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df61d2c8-cf49-41a1-8a4c-bbaa1068e064/bin/uautomizer-verify-84ZbGMXZE1/data/0b30f8461/40c9cd7a14a1423a90e5eaf6d208db5e [2024-12-02 07:41:12,109 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-12-02 07:41:12,110 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-12-02 07:41:12,111 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-12-02 07:41:12,111 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-12-02 07:41:12,114 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-12-02 07:41:12,114 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:41:12" (1/1) ... [2024-12-02 07:41:12,115 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bf50a00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:41:12, skipping insertion in model container [2024-12-02 07:41:12,115 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:41:12" (1/1) ... [2024-12-02 07:41:12,144 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-12-02 07:41:12,504 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df61d2c8-cf49-41a1-8a4c-bbaa1068e064/sv-benchmarks/c/goblint-regression/28-race_reach_87-lists_racefree.i[47038,47051] [2024-12-02 07:41:12,537 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 07:41:12,725 INFO L200 MainTranslator]: Completed pre-run [2024-12-02 07:41:12,785 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df61d2c8-cf49-41a1-8a4c-bbaa1068e064/sv-benchmarks/c/goblint-regression/28-race_reach_87-lists_racefree.i[47038,47051] [2024-12-02 07:41:12,798 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 07:41:12,886 INFO L204 MainTranslator]: Completed translation [2024-12-02 07:41:12,886 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:41:12 WrapperNode [2024-12-02 07:41:12,887 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-12-02 07:41:12,888 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-12-02 07:41:12,888 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-12-02 07:41:12,888 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-12-02 07:41:12,894 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:41:12" (1/1) ... [2024-12-02 07:41:12,924 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:41:12" (1/1) ... [2024-12-02 07:41:12,995 INFO L138 Inliner]: procedures = 280, calls = 1604, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 1775 [2024-12-02 07:41:12,996 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-12-02 07:41:12,996 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-12-02 07:41:12,997 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-12-02 07:41:12,997 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-12-02 07:41:13,006 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:41:12" (1/1) ... [2024-12-02 07:41:13,007 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:41:12" (1/1) ... [2024-12-02 07:41:13,023 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:41:12" (1/1) ... [2024-12-02 07:41:13,057 INFO L175 MemorySlicer]: Split 1569 memory accesses to 8 slices as follows [2, 5, 259, 14, 5, 1280, 2, 2]. 82 percent of accesses are in the largest equivalence class. The 1548 initializations are split as follows [2, 5, 256, 0, 5, 1280, 0, 0]. The 11 writes are split as follows [0, 0, 1, 8, 0, 0, 1, 1]. [2024-12-02 07:41:13,057 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:41:12" (1/1) ... [2024-12-02 07:41:13,057 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:41:12" (1/1) ... [2024-12-02 07:41:13,097 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:41:12" (1/1) ... [2024-12-02 07:41:13,103 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:41:12" (1/1) ... [2024-12-02 07:41:13,128 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:41:12" (1/1) ... [2024-12-02 07:41:13,135 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:41:12" (1/1) ... [2024-12-02 07:41:13,140 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:41:12" (1/1) ... [2024-12-02 07:41:13,153 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-12-02 07:41:13,154 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-12-02 07:41:13,154 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-12-02 07:41:13,154 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-12-02 07:41:13,155 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:41:12" (1/1) ... [2024-12-02 07:41:13,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 07:41:13,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df61d2c8-cf49-41a1-8a4c-bbaa1068e064/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:41:13,183 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df61d2c8-cf49-41a1-8a4c-bbaa1068e064/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-12-02 07:41:13,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df61d2c8-cf49-41a1-8a4c-bbaa1068e064/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-12-02 07:41:13,209 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-12-02 07:41:13,209 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-12-02 07:41:13,209 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-12-02 07:41:13,209 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-12-02 07:41:13,209 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2024-12-02 07:41:13,209 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#4 [2024-12-02 07:41:13,209 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#5 [2024-12-02 07:41:13,209 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#6 [2024-12-02 07:41:13,209 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#7 [2024-12-02 07:41:13,209 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2024-12-02 07:41:13,210 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2024-12-02 07:41:13,210 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-12-02 07:41:13,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-12-02 07:41:13,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-12-02 07:41:13,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-12-02 07:41:13,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2024-12-02 07:41:13,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#4 [2024-12-02 07:41:13,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#5 [2024-12-02 07:41:13,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#6 [2024-12-02 07:41:13,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#7 [2024-12-02 07:41:13,210 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-12-02 07:41:13,210 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-12-02 07:41:13,210 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-12-02 07:41:13,210 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-12-02 07:41:13,211 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-12-02 07:41:13,211 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-12-02 07:41:13,211 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-12-02 07:41:13,211 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-12-02 07:41:13,211 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2024-12-02 07:41:13,211 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2024-12-02 07:41:13,211 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2024-12-02 07:41:13,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-12-02 07:41:13,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-12-02 07:41:13,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-12-02 07:41:13,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-12-02 07:41:13,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-12-02 07:41:13,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-12-02 07:41:13,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-12-02 07:41:13,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2024-12-02 07:41:13,211 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-12-02 07:41:13,211 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-12-02 07:41:13,211 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-12-02 07:41:13,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-12-02 07:41:13,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-12-02 07:41:13,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-12-02 07:41:13,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2024-12-02 07:41:13,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#4 [2024-12-02 07:41:13,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#5 [2024-12-02 07:41:13,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#6 [2024-12-02 07:41:13,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#7 [2024-12-02 07:41:13,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-12-02 07:41:13,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-12-02 07:41:13,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-12-02 07:41:13,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-12-02 07:41:13,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-12-02 07:41:13,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-12-02 07:41:13,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-12-02 07:41:13,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2024-12-02 07:41:13,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-12-02 07:41:13,213 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-12-02 07:41:13,214 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-12-02 07:41:13,386 INFO L234 CfgBuilder]: Building ICFG [2024-12-02 07:41:13,388 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-12-02 07:41:15,259 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-12-02 07:41:15,260 INFO L283 CfgBuilder]: Performing block encoding [2024-12-02 07:41:47,107 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-12-02 07:41:47,108 INFO L312 CfgBuilder]: Removed 11 assume(true) statements. [2024-12-02 07:41:47,108 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:41:47 BoogieIcfgContainer [2024-12-02 07:41:47,108 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-12-02 07:41:47,110 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-12-02 07:41:47,110 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-12-02 07:41:47,113 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-12-02 07:41:47,114 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 07:41:12" (1/3) ... [2024-12-02 07:41:47,114 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67248d77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:41:47, skipping insertion in model container [2024-12-02 07:41:47,114 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:41:12" (2/3) ... [2024-12-02 07:41:47,115 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67248d77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:41:47, skipping insertion in model container [2024-12-02 07:41:47,115 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:41:47" (3/3) ... [2024-12-02 07:41:47,116 INFO L128 eAbstractionObserver]: Analyzing ICFG 28-race_reach_87-lists_racefree.i [2024-12-02 07:41:47,127 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-12-02 07:41:47,128 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG 28-race_reach_87-lists_racefree.i that has 3 procedures, 57 locations, 1 initial locations, 11 loop locations, and 1 error locations. [2024-12-02 07:41:47,128 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-12-02 07:41:47,218 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-12-02 07:41:47,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 63 places, 77 transitions, 174 flow [2024-12-02 07:41:47,370 INFO L124 PetriNetUnfolderBase]: 37/157 cut-off events. [2024-12-02 07:41:47,372 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-12-02 07:41:47,375 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 589 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. [2024-12-02 07:41:47,376 INFO L82 GeneralOperation]: Start removeDead. Operand has 63 places, 77 transitions, 174 flow [2024-12-02 07:41:47,379 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 63 places, 75 transitions, 164 flow [2024-12-02 07:41:47,386 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-12-02 07:41:47,395 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=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;@7f7f01bf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-12-02 07:41:47,395 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-12-02 07:41:47,452 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-12-02 07:41:47,453 INFO L124 PetriNetUnfolderBase]: 1/21 cut-off events. [2024-12-02 07:41:47,453 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-12-02 07:41:47,453 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:41:47,453 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-12-02 07:41:47,454 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 07:41:47,457 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:41:47,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1250688880, now seen corresponding path program 1 times [2024-12-02 07:41:47,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:41:47,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876493312] [2024-12-02 07:41:47,464 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:41:47,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:41:47,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:41:48,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:41:48,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:41:48,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876493312] [2024-12-02 07:41:48,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876493312] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:41:48,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:41:48,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 07:41:48,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113691351] [2024-12-02 07:41:48,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:41:48,187 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 07:41:48,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:41:48,206 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 07:41:48,207 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 07:41:48,208 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 77 [2024-12-02 07:41:48,210 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) [2024-12-02 07:41:48,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:41:48,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 77 [2024-12-02 07:41:48,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:41:49,138 INFO L124 PetriNetUnfolderBase]: 2345/4514 cut-off events. [2024-12-02 07:41:49,138 INFO L125 PetriNetUnfolderBase]: For 134/134 co-relation queries the response was YES. [2024-12-02 07:41:49,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8336 conditions, 4514 events. 2345/4514 cut-off events. For 134/134 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 27585 event pairs, 2178 based on Foata normal form. 406/4212 useless extension candidates. Maximal degree in co-relation 7102. Up to 3752 conditions per place. [2024-12-02 07:41:49,159 INFO L140 encePairwiseOnDemand]: 62/77 looper letters, 47 selfloop transitions, 2 changer transitions 0/64 dead transitions. [2024-12-02 07:41:49,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 64 transitions, 240 flow [2024-12-02 07:41:49,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 07:41:49,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 07:41:49,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 107 transitions. [2024-12-02 07:41:49,172 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46320346320346323 [2024-12-02 07:41:49,173 INFO L175 Difference]: Start difference. First operand has 63 places, 75 transitions, 164 flow. Second operand 3 states and 107 transitions. [2024-12-02 07:41:49,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 64 transitions, 240 flow [2024-12-02 07:41:49,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 64 transitions, 240 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-12-02 07:41:49,182 INFO L231 Difference]: Finished difference. Result has 66 places, 64 transitions, 152 flow [2024-12-02 07:41:49,185 INFO L262 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} [2024-12-02 07:41:49,188 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 3 predicate places. [2024-12-02 07:41:49,188 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 64 transitions, 152 flow [2024-12-02 07:41:49,188 INFO L472 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) [2024-12-02 07:41:49,189 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:41:49,189 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-12-02 07:41:49,189 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-12-02 07:41:49,189 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 07:41:49,189 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:41:49,190 INFO L85 PathProgramCache]: Analyzing trace with hash -67951302, now seen corresponding path program 1 times [2024-12-02 07:41:49,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:41:49,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968242721] [2024-12-02 07:41:49,190 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:41:49,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:41:49,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:41:49,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:41:49,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:41:49,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968242721] [2024-12-02 07:41:49,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968242721] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:41:49,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614673844] [2024-12-02 07:41:49,762 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:41:49,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:41:49,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df61d2c8-cf49-41a1-8a4c-bbaa1068e064/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:41:49,765 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df61d2c8-cf49-41a1-8a4c-bbaa1068e064/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:41:49,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df61d2c8-cf49-41a1-8a4c-bbaa1068e064/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-12-02 07:41:50,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:41:50,420 INFO L256 TraceCheckSpWp]: Trace formula consists of 3764 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-12-02 07:41:50,424 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:41:50,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:41:50,447 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:41:50,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:41:50,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614673844] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:41:50,463 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:41:50,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-12-02 07:41:50,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960337644] [2024-12-02 07:41:50,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:41:50,464 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-12-02 07:41:50,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:41:50,465 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-12-02 07:41:50,465 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-12-02 07:41:50,465 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 77 [2024-12-02 07:41:50,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 64 transitions, 152 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 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) [2024-12-02 07:41:50,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:41:50,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 77 [2024-12-02 07:41:50,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:41:51,150 INFO L124 PetriNetUnfolderBase]: 2345/4517 cut-off events. [2024-12-02 07:41:51,150 INFO L125 PetriNetUnfolderBase]: For 134/134 co-relation queries the response was YES. [2024-12-02 07:41:51,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8352 conditions, 4517 events. 2345/4517 cut-off events. For 134/134 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 27575 event pairs, 2178 based on Foata normal form. 0/3809 useless extension candidates. Maximal degree in co-relation 8339. Up to 3752 conditions per place. [2024-12-02 07:41:51,162 INFO L140 encePairwiseOnDemand]: 74/77 looper letters, 47 selfloop transitions, 5 changer transitions 0/67 dead transitions. [2024-12-02 07:41:51,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 67 transitions, 268 flow [2024-12-02 07:41:51,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 07:41:51,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-12-02 07:41:51,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-12-02 07:41:51,164 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.31385281385281383 [2024-12-02 07:41:51,165 INFO L175 Difference]: Start difference. First operand has 66 places, 64 transitions, 152 flow. Second operand 6 states and 145 transitions. [2024-12-02 07:41:51,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 67 transitions, 268 flow [2024-12-02 07:41:51,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 67 transitions, 264 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-12-02 07:41:51,168 INFO L231 Difference]: Finished difference. Result has 73 places, 67 transitions, 184 flow [2024-12-02 07:41:51,168 INFO L262 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} [2024-12-02 07:41:51,169 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 10 predicate places. [2024-12-02 07:41:51,169 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 67 transitions, 184 flow [2024-12-02 07:41:51,169 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 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) [2024-12-02 07:41:51,169 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:41:51,169 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2024-12-02 07:41:51,180 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df61d2c8-cf49-41a1-8a4c-bbaa1068e064/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-12-02 07:41:51,370 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df61d2c8-cf49-41a1-8a4c-bbaa1068e064/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2024-12-02 07:41:51,370 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 07:41:51,370 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:41:51,370 INFO L85 PathProgramCache]: Analyzing trace with hash -32759312, now seen corresponding path program 2 times [2024-12-02 07:41:51,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:41:51,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671211238] [2024-12-02 07:41:51,371 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 07:41:51,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:41:51,514 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 07:41:51,514 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:41:51,859 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:41:51,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:41:51,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671211238] [2024-12-02 07:41:51,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671211238] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:41:51,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713165623] [2024-12-02 07:41:51,859 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 07:41:51,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:41:51,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df61d2c8-cf49-41a1-8a4c-bbaa1068e064/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:41:51,861 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df61d2c8-cf49-41a1-8a4c-bbaa1068e064/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:41:51,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df61d2c8-cf49-41a1-8a4c-bbaa1068e064/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-12-02 07:41:52,528 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 07:41:52,528 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:41:52,539 INFO L256 TraceCheckSpWp]: Trace formula consists of 3917 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-12-02 07:41:52,541 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:41:52,555 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:41:52,555 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:41:52,606 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:41:52,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713165623] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:41:52,606 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:41:52,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-12-02 07:41:52,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789645286] [2024-12-02 07:41:52,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:41:52,607 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-12-02 07:41:52,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:41:52,607 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-12-02 07:41:52,608 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-12-02 07:41:52,608 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 77 [2024-12-02 07:41:52,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 67 transitions, 184 flow. Second operand has 13 states, 13 states have (on average 16.307692307692307) internal successors, (212), 13 states have internal predecessors, (212), 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) [2024-12-02 07:41:52,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:41:52,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 77 [2024-12-02 07:41:52,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:41:53,146 INFO L124 PetriNetUnfolderBase]: 2345/4523 cut-off events. [2024-12-02 07:41:53,146 INFO L125 PetriNetUnfolderBase]: For 154/154 co-relation queries the response was YES. [2024-12-02 07:41:53,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8389 conditions, 4523 events. 2345/4523 cut-off events. For 154/154 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 27582 event pairs, 2178 based on Foata normal form. 6/3822 useless extension candidates. Maximal degree in co-relation 8330. Up to 3752 conditions per place. [2024-12-02 07:41:53,161 INFO L140 encePairwiseOnDemand]: 74/77 looper letters, 47 selfloop transitions, 11 changer transitions 0/73 dead transitions. [2024-12-02 07:41:53,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 73 transitions, 336 flow [2024-12-02 07:41:53,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-12-02 07:41:53,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-12-02 07:41:53,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 244 transitions. [2024-12-02 07:41:53,164 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.26406926406926406 [2024-12-02 07:41:53,164 INFO L175 Difference]: Start difference. First operand has 73 places, 67 transitions, 184 flow. Second operand 12 states and 244 transitions. [2024-12-02 07:41:53,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 73 transitions, 336 flow [2024-12-02 07:41:53,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 73 transitions, 322 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-12-02 07:41:53,168 INFO L231 Difference]: Finished difference. Result has 89 places, 73 transitions, 254 flow [2024-12-02 07:41:53,168 INFO L262 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} [2024-12-02 07:41:53,168 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 26 predicate places. [2024-12-02 07:41:53,168 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 73 transitions, 254 flow [2024-12-02 07:41:53,169 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 16.307692307692307) internal successors, (212), 13 states have internal predecessors, (212), 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) [2024-12-02 07:41:53,169 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:41:53,169 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2024-12-02 07:41:53,183 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df61d2c8-cf49-41a1-8a4c-bbaa1068e064/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-12-02 07:41:53,369 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df61d2c8-cf49-41a1-8a4c-bbaa1068e064/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:41:53,369 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 07:41:53,370 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:41:53,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1710128560, now seen corresponding path program 3 times [2024-12-02 07:41:53,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:41:53,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8972921] [2024-12-02 07:41:53,370 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 07:41:53,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:41:53,712 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-12-02 07:41:53,713 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:41:54,342 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:41:54,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:41:54,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8972921] [2024-12-02 07:41:54,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8972921] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:41:54,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852652096] [2024-12-02 07:41:54,343 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 07:41:54,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:41:54,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df61d2c8-cf49-41a1-8a4c-bbaa1068e064/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:41:54,345 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df61d2c8-cf49-41a1-8a4c-bbaa1068e064/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:41:54,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df61d2c8-cf49-41a1-8a4c-bbaa1068e064/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-12-02 07:42:08,077 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-12-02 07:42:08,077 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:42:08,098 INFO L256 TraceCheckSpWp]: Trace formula consists of 4223 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-12-02 07:42:08,101 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:42:08,140 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:42:08,140 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:42:08,289 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:42:08,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852652096] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:42:08,290 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:42:08,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2024-12-02 07:42:08,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690986232] [2024-12-02 07:42:08,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:42:08,290 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-12-02 07:42:08,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:42:08,291 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-12-02 07:42:08,291 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=326, Unknown=0, NotChecked=0, Total=650 [2024-12-02 07:42:08,291 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 77 [2024-12-02 07:42:08,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 73 transitions, 254 flow. Second operand has 26 states, 26 states have (on average 16.192307692307693) internal successors, (421), 26 states have internal predecessors, (421), 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) [2024-12-02 07:42:08,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:42:08,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 77 [2024-12-02 07:42:08,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:42:08,895 INFO L124 PetriNetUnfolderBase]: 2345/4535 cut-off events. [2024-12-02 07:42:08,895 INFO L125 PetriNetUnfolderBase]: For 597/597 co-relation queries the response was YES. [2024-12-02 07:42:08,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8473 conditions, 4535 events. 2345/4535 cut-off events. For 597/597 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 27579 event pairs, 2178 based on Foata normal form. 12/3840 useless extension candidates. Maximal degree in co-relation 8336. Up to 3752 conditions per place. [2024-12-02 07:42:08,911 INFO L140 encePairwiseOnDemand]: 74/77 looper letters, 47 selfloop transitions, 23 changer transitions 0/85 dead transitions. [2024-12-02 07:42:08,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 85 transitions, 490 flow [2024-12-02 07:42:08,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-12-02 07:42:08,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-12-02 07:42:08,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 442 transitions. [2024-12-02 07:42:08,914 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.23917748917748918 [2024-12-02 07:42:08,914 INFO L175 Difference]: Start difference. First operand has 89 places, 73 transitions, 254 flow. Second operand 24 states and 442 transitions. [2024-12-02 07:42:08,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 85 transitions, 490 flow [2024-12-02 07:42:08,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 85 transitions, 418 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-12-02 07:42:08,919 INFO L231 Difference]: Finished difference. Result has 119 places, 85 transitions, 374 flow [2024-12-02 07:42:08,919 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=374, PETRI_PLACES=119, PETRI_TRANSITIONS=85} [2024-12-02 07:42:08,920 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 56 predicate places. [2024-12-02 07:42:08,920 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 85 transitions, 374 flow [2024-12-02 07:42:08,920 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 16.192307692307693) internal successors, (421), 26 states have internal predecessors, (421), 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) [2024-12-02 07:42:08,920 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:42:08,920 INFO L206 CegarLoopForPetriNet]: trace histogram [22, 2, 1, 1, 1, 1, 1] [2024-12-02 07:42:08,942 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df61d2c8-cf49-41a1-8a4c-bbaa1068e064/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-12-02 07:42:09,120 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df61d2c8-cf49-41a1-8a4c-bbaa1068e064/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:42:09,121 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 07:42:09,121 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:42:09,121 INFO L85 PathProgramCache]: Analyzing trace with hash 2055456048, now seen corresponding path program 4 times [2024-12-02 07:42:09,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:42:09,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104405447] [2024-12-02 07:42:09,121 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 07:42:09,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:42:09,254 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 07:42:09,254 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:42:10,377 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:42:10,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:42:10,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104405447] [2024-12-02 07:42:10,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104405447] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:42:10,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204529695] [2024-12-02 07:42:10,378 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 07:42:10,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:42:10,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df61d2c8-cf49-41a1-8a4c-bbaa1068e064/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:42:10,379 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df61d2c8-cf49-41a1-8a4c-bbaa1068e064/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:42:10,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df61d2c8-cf49-41a1-8a4c-bbaa1068e064/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-12-02 07:42:11,136 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 07:42:11,137 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:42:11,152 INFO L256 TraceCheckSpWp]: Trace formula consists of 4835 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-12-02 07:42:11,155 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:42:11,201 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:42:11,202 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:42:11,803 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:42:11,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204529695] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:42:11,803 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:42:11,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2024-12-02 07:42:11,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392390032] [2024-12-02 07:42:11,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:42:11,804 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-12-02 07:42:11,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:42:11,806 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-12-02 07:42:11,806 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2024-12-02 07:42:11,807 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 77 [2024-12-02 07:42:11,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 85 transitions, 374 flow. Second operand has 49 states, 49 states have (on average 16.081632653061224) internal successors, (788), 49 states have internal predecessors, (788), 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) [2024-12-02 07:42:11,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:42:11,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 77 [2024-12-02 07:42:11,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:42:12,594 INFO L124 PetriNetUnfolderBase]: 2345/4559 cut-off events. [2024-12-02 07:42:12,594 INFO L125 PetriNetUnfolderBase]: For 5367/5367 co-relation queries the response was YES. [2024-12-02 07:42:12,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8617 conditions, 4559 events. 2345/4559 cut-off events. For 5367/5367 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 27579 event pairs, 2178 based on Foata normal form. 24/3876 useless extension candidates. Maximal degree in co-relation 8348. Up to 3752 conditions per place. [2024-12-02 07:42:12,612 INFO L140 encePairwiseOnDemand]: 74/77 looper letters, 47 selfloop transitions, 47 changer transitions 0/109 dead transitions. [2024-12-02 07:42:12,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 109 transitions, 754 flow [2024-12-02 07:42:12,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-12-02 07:42:12,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2024-12-02 07:42:12,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 838 transitions. [2024-12-02 07:42:12,618 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.22673160173160173 [2024-12-02 07:42:12,618 INFO L175 Difference]: Start difference. First operand has 119 places, 85 transitions, 374 flow. Second operand 48 states and 838 transitions. [2024-12-02 07:42:12,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 109 transitions, 754 flow [2024-12-02 07:42:12,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 109 transitions, 610 flow, removed 61 selfloop flow, removed 11 redundant places. [2024-12-02 07:42:12,628 INFO L231 Difference]: Finished difference. Result has 179 places, 109 transitions, 614 flow [2024-12-02 07:42:12,628 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=614, PETRI_PLACES=179, PETRI_TRANSITIONS=109} [2024-12-02 07:42:12,629 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 116 predicate places. [2024-12-02 07:42:12,629 INFO L471 AbstractCegarLoop]: Abstraction has has 179 places, 109 transitions, 614 flow [2024-12-02 07:42:12,630 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 16.081632653061224) internal successors, (788), 49 states have internal predecessors, (788), 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) [2024-12-02 07:42:12,630 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:42:12,630 INFO L206 CegarLoopForPetriNet]: trace histogram [46, 2, 1, 1, 1, 1, 1] [2024-12-02 07:42:12,647 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df61d2c8-cf49-41a1-8a4c-bbaa1068e064/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-12-02 07:42:12,830 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df61d2c8-cf49-41a1-8a4c-bbaa1068e064/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:42:12,830 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 07:42:12,831 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:42:12,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1392546864, now seen corresponding path program 5 times [2024-12-02 07:42:12,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:42:12,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523989556] [2024-12-02 07:42:12,831 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 07:42:12,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:42:13,362 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2024-12-02 07:42:13,362 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:42:16,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:42:16,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:42:16,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523989556] [2024-12-02 07:42:16,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523989556] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:42:16,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298165712] [2024-12-02 07:42:16,433 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 07:42:16,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:42:16,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df61d2c8-cf49-41a1-8a4c-bbaa1068e064/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:42:16,435 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df61d2c8-cf49-41a1-8a4c-bbaa1068e064/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:42:16,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df61d2c8-cf49-41a1-8a4c-bbaa1068e064/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process