./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c --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_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/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_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/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_0bf5681a-c94f-477a-9e74-dddab0e113b9/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 670814d0a16da58b0f26835e20c05a244e2f373856f13b9d4ff2a931783edf81 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-12-02 05:49:40,550 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-12-02 05:49:40,604 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-12-02 05:49:40,608 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-12-02 05:49:40,609 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-12-02 05:49:40,630 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-12-02 05:49:40,631 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-12-02 05:49:40,631 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-12-02 05:49:40,631 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-12-02 05:49:40,631 INFO L153 SettingsManager]: * Use memory slicer=true [2024-12-02 05:49:40,631 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-12-02 05:49:40,631 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-12-02 05:49:40,632 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-12-02 05:49:40,632 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-12-02 05:49:40,632 INFO L153 SettingsManager]: * Use SBE=true [2024-12-02 05:49:40,632 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-12-02 05:49:40,632 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-12-02 05:49:40,632 INFO L153 SettingsManager]: * sizeof long=4 [2024-12-02 05:49:40,632 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-12-02 05:49:40,632 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-12-02 05:49:40,632 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-12-02 05:49:40,633 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-12-02 05:49:40,633 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-12-02 05:49:40,633 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-12-02 05:49:40,633 INFO L153 SettingsManager]: * sizeof long double=12 [2024-12-02 05:49:40,633 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-12-02 05:49:40,633 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-12-02 05:49:40,633 INFO L153 SettingsManager]: * Use constant arrays=true [2024-12-02 05:49:40,633 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-12-02 05:49:40,633 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 05:49:40,633 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 05:49:40,633 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 05:49:40,633 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 05:49:40,634 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-12-02 05:49:40,634 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 05:49:40,634 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 05:49:40,634 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 05:49:40,634 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 05:49:40,634 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-12-02 05:49:40,634 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-12-02 05:49:40,634 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-12-02 05:49:40,634 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-12-02 05:49:40,634 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-12-02 05:49:40,634 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-12-02 05:49:40,634 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-12-02 05:49:40,635 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-12-02 05:49:40,635 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-12-02 05:49:40,635 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-12-02 05:49:40,635 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_0bf5681a-c94f-477a-9e74-dddab0e113b9/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 -> 670814d0a16da58b0f26835e20c05a244e2f373856f13b9d4ff2a931783edf81 [2024-12-02 05:49:40,855 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-12-02 05:49:40,863 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-12-02 05:49:40,865 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-12-02 05:49:40,866 INFO L270 PluginConnector]: Initializing CDTParser... [2024-12-02 05:49:40,866 INFO L274 PluginConnector]: CDTParser initialized [2024-12-02 05:49:40,867 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/../../sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c [2024-12-02 05:49:43,492 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/data/b51966801/615e011522e34127afd5a251138a0c55/FLAGed8a11c45 [2024-12-02 05:49:43,714 INFO L384 CDTParser]: Found 1 translation units. [2024-12-02 05:49:43,714 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c [2024-12-02 05:49:43,721 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/data/b51966801/615e011522e34127afd5a251138a0c55/FLAGed8a11c45 [2024-12-02 05:49:43,736 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/data/b51966801/615e011522e34127afd5a251138a0c55 [2024-12-02 05:49:43,738 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-12-02 05:49:43,740 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-12-02 05:49:43,741 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-12-02 05:49:43,741 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-12-02 05:49:43,745 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-12-02 05:49:43,746 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:49:43" (1/1) ... [2024-12-02 05:49:43,747 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29ad44d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:49:43, skipping insertion in model container [2024-12-02 05:49:43,747 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:49:43" (1/1) ... [2024-12-02 05:49:43,763 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-12-02 05:49:43,930 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_0bf5681a-c94f-477a-9e74-dddab0e113b9/sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c[2862,2875] [2024-12-02 05:49:43,942 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 05:49:43,952 INFO L200 MainTranslator]: Completed pre-run [2024-12-02 05:49:43,974 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c[2862,2875] [2024-12-02 05:49:43,978 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 05:49:43,994 INFO L204 MainTranslator]: Completed translation [2024-12-02 05:49:43,994 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:49:43 WrapperNode [2024-12-02 05:49:43,995 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-12-02 05:49:43,996 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-12-02 05:49:43,996 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-12-02 05:49:43,996 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-12-02 05:49:44,003 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:49:43" (1/1) ... [2024-12-02 05:49:44,011 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:49:43" (1/1) ... [2024-12-02 05:49:44,037 INFO L138 Inliner]: procedures = 25, calls = 42, calls flagged for inlining = 14, calls inlined = 22, statements flattened = 218 [2024-12-02 05:49:44,037 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-12-02 05:49:44,038 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-12-02 05:49:44,038 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-12-02 05:49:44,038 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-12-02 05:49:44,047 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:49:43" (1/1) ... [2024-12-02 05:49:44,048 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:49:43" (1/1) ... [2024-12-02 05:49:44,051 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:49:43" (1/1) ... [2024-12-02 05:49:44,071 INFO L175 MemorySlicer]: Split 18 memory accesses to 2 slices as follows [2, 16]. 89 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 4 writes are split as follows [0, 4]. [2024-12-02 05:49:44,072 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:49:43" (1/1) ... [2024-12-02 05:49:44,072 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:49:43" (1/1) ... [2024-12-02 05:49:44,080 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:49:43" (1/1) ... [2024-12-02 05:49:44,081 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:49:43" (1/1) ... [2024-12-02 05:49:44,085 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:49:43" (1/1) ... [2024-12-02 05:49:44,087 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:49:43" (1/1) ... [2024-12-02 05:49:44,089 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:49:43" (1/1) ... [2024-12-02 05:49:44,092 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-12-02 05:49:44,092 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-12-02 05:49:44,093 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-12-02 05:49:44,093 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-12-02 05:49:44,094 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:49:43" (1/1) ... [2024-12-02 05:49:44,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 05:49:44,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 05:49:44,125 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-12-02 05:49:44,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-12-02 05:49:44,152 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-12-02 05:49:44,152 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-12-02 05:49:44,153 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-12-02 05:49:44,153 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-12-02 05:49:44,153 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-12-02 05:49:44,153 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-12-02 05:49:44,153 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-12-02 05:49:44,153 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-12-02 05:49:44,153 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-12-02 05:49:44,153 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-12-02 05:49:44,153 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-12-02 05:49:44,153 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-12-02 05:49:44,153 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-12-02 05:49:44,153 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-12-02 05:49:44,153 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-12-02 05:49:44,154 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-12-02 05:49:44,154 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-12-02 05:49:44,154 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-12-02 05:49:44,155 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 05:49:44,256 INFO L234 CfgBuilder]: Building ICFG [2024-12-02 05:49:44,258 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-12-02 05:49:44,668 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-12-02 05:49:44,668 INFO L283 CfgBuilder]: Performing block encoding [2024-12-02 05:49:44,966 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-12-02 05:49:44,966 INFO L312 CfgBuilder]: Removed 6 assume(true) statements. [2024-12-02 05:49:44,966 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:49:44 BoogieIcfgContainer [2024-12-02 05:49:44,967 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-12-02 05:49:44,968 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-12-02 05:49:44,968 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-12-02 05:49:44,971 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-12-02 05:49:44,971 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 05:49:43" (1/3) ... [2024-12-02 05:49:44,972 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72179f85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:49:44, skipping insertion in model container [2024-12-02 05:49:44,972 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:49:43" (2/3) ... [2024-12-02 05:49:44,972 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72179f85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:49:44, skipping insertion in model container [2024-12-02 05:49:44,972 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:49:44" (3/3) ... [2024-12-02 05:49:44,973 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-three-array-max.wvr.c [2024-12-02 05:49:44,986 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-12-02 05:49:44,987 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-three-array-max.wvr.c that has 4 procedures, 33 locations, 1 initial locations, 6 loop locations, and 1 error locations. [2024-12-02 05:49:44,987 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-12-02 05:49:45,040 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-12-02 05:49:45,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 42 places, 39 transitions, 99 flow [2024-12-02 05:49:45,106 INFO L124 PetriNetUnfolderBase]: 7/36 cut-off events. [2024-12-02 05:49:45,108 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-12-02 05:49:45,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 36 events. 7/36 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 40 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 26. Up to 2 conditions per place. [2024-12-02 05:49:45,111 INFO L82 GeneralOperation]: Start removeDead. Operand has 42 places, 39 transitions, 99 flow [2024-12-02 05:49:45,114 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 38 places, 35 transitions, 88 flow [2024-12-02 05:49:45,122 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-12-02 05:49:45,134 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;@792aa0a4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-12-02 05:49:45,134 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-12-02 05:49:45,151 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-12-02 05:49:45,151 INFO L124 PetriNetUnfolderBase]: 7/34 cut-off events. [2024-12-02 05:49:45,151 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-12-02 05:49:45,151 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 05:49:45,152 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 05:49:45,152 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 05:49:45,157 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 05:49:45,157 INFO L85 PathProgramCache]: Analyzing trace with hash -694752852, now seen corresponding path program 1 times [2024-12-02 05:49:45,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 05:49:45,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596976186] [2024-12-02 05:49:45,165 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 05:49:45,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 05:49:45,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 05:49:45,549 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 05:49:45,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 05:49:45,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596976186] [2024-12-02 05:49:45,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596976186] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 05:49:45,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 05:49:45,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 05:49:45,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546877036] [2024-12-02 05:49:45,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 05:49:45,557 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 05:49:45,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 05:49:45,578 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 05:49:45,578 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 05:49:45,579 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2024-12-02 05:49:45,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 35 transitions, 88 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 05:49:45,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 05:49:45,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2024-12-02 05:49:45,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 05:49:45,789 INFO L124 PetriNetUnfolderBase]: 362/620 cut-off events. [2024-12-02 05:49:45,790 INFO L125 PetriNetUnfolderBase]: For 53/53 co-relation queries the response was YES. [2024-12-02 05:49:45,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1171 conditions, 620 events. 362/620 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2537 event pairs, 230 based on Foata normal form. 0/543 useless extension candidates. Maximal degree in co-relation 993. Up to 492 conditions per place. [2024-12-02 05:49:45,798 INFO L140 encePairwiseOnDemand]: 36/39 looper letters, 27 selfloop transitions, 2 changer transitions 0/36 dead transitions. [2024-12-02 05:49:45,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 36 transitions, 148 flow [2024-12-02 05:49:45,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 05:49:45,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 05:49:45,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 60 transitions. [2024-12-02 05:49:45,810 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5128205128205128 [2024-12-02 05:49:45,812 INFO L175 Difference]: Start difference. First operand has 38 places, 35 transitions, 88 flow. Second operand 3 states and 60 transitions. [2024-12-02 05:49:45,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 36 transitions, 148 flow [2024-12-02 05:49:45,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 36 transitions, 136 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-12-02 05:49:45,821 INFO L231 Difference]: Finished difference. Result has 35 places, 36 transitions, 88 flow [2024-12-02 05:49:45,823 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=35, PETRI_TRANSITIONS=36} [2024-12-02 05:49:45,825 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, -3 predicate places. [2024-12-02 05:49:45,826 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 36 transitions, 88 flow [2024-12-02 05:49:45,826 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 05:49:45,826 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 05:49:45,826 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 05:49:45,826 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-12-02 05:49:45,826 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 05:49:45,827 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 05:49:45,827 INFO L85 PathProgramCache]: Analyzing trace with hash -891570204, now seen corresponding path program 1 times [2024-12-02 05:49:45,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 05:49:45,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150034371] [2024-12-02 05:49:45,828 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 05:49:45,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 05:49:45,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 05:49:45,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 05:49:45,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 05:49:45,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150034371] [2024-12-02 05:49:45,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150034371] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 05:49:45,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 05:49:45,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 05:49:45,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161693784] [2024-12-02 05:49:45,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 05:49:45,998 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 05:49:45,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 05:49:45,999 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 05:49:45,999 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 05:49:46,006 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2024-12-02 05:49:46,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 36 transitions, 88 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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 05:49:46,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 05:49:46,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2024-12-02 05:49:46,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 05:49:46,170 INFO L124 PetriNetUnfolderBase]: 362/622 cut-off events. [2024-12-02 05:49:46,171 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2024-12-02 05:49:46,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1141 conditions, 622 events. 362/622 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2535 event pairs, 230 based on Foata normal form. 0/545 useless extension candidates. Maximal degree in co-relation 1130. Up to 491 conditions per place. [2024-12-02 05:49:46,175 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 25 selfloop transitions, 6 changer transitions 0/38 dead transitions. [2024-12-02 05:49:46,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 38 transitions, 154 flow [2024-12-02 05:49:46,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 05:49:46,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 05:49:46,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 73 transitions. [2024-12-02 05:49:46,177 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46794871794871795 [2024-12-02 05:49:46,177 INFO L175 Difference]: Start difference. First operand has 35 places, 36 transitions, 88 flow. Second operand 4 states and 73 transitions. [2024-12-02 05:49:46,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 38 transitions, 154 flow [2024-12-02 05:49:46,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 38 transitions, 150 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-12-02 05:49:46,178 INFO L231 Difference]: Finished difference. Result has 38 places, 38 transitions, 112 flow [2024-12-02 05:49:46,179 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=112, PETRI_PLACES=38, PETRI_TRANSITIONS=38} [2024-12-02 05:49:46,179 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 0 predicate places. [2024-12-02 05:49:46,179 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 38 transitions, 112 flow [2024-12-02 05:49:46,179 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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 05:49:46,180 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 05:49:46,180 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 05:49:46,180 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-12-02 05:49:46,180 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 05:49:46,180 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 05:49:46,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1405796623, now seen corresponding path program 1 times [2024-12-02 05:49:46,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 05:49:46,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306384143] [2024-12-02 05:49:46,181 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 05:49:46,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 05:49:46,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 05:49:46,334 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 05:49:46,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 05:49:46,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306384143] [2024-12-02 05:49:46,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306384143] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 05:49:46,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 05:49:46,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 05:49:46,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689956169] [2024-12-02 05:49:46,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 05:49:46,335 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 05:49:46,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 05:49:46,335 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 05:49:46,335 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 05:49:46,335 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2024-12-02 05:49:46,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 38 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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 05:49:46,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 05:49:46,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2024-12-02 05:49:46,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 05:49:46,525 INFO L124 PetriNetUnfolderBase]: 525/955 cut-off events. [2024-12-02 05:49:46,525 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-12-02 05:49:46,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1677 conditions, 955 events. 525/955 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 4323 event pairs, 172 based on Foata normal form. 1/836 useless extension candidates. Maximal degree in co-relation 1657. Up to 361 conditions per place. [2024-12-02 05:49:46,531 INFO L140 encePairwiseOnDemand]: 36/39 looper letters, 40 selfloop transitions, 2 changer transitions 2/51 dead transitions. [2024-12-02 05:49:46,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 51 transitions, 229 flow [2024-12-02 05:49:46,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 05:49:46,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 05:49:46,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2024-12-02 05:49:46,533 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6153846153846154 [2024-12-02 05:49:46,533 INFO L175 Difference]: Start difference. First operand has 38 places, 38 transitions, 112 flow. Second operand 3 states and 72 transitions. [2024-12-02 05:49:46,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 51 transitions, 229 flow [2024-12-02 05:49:46,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 51 transitions, 228 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-12-02 05:49:46,535 INFO L231 Difference]: Finished difference. Result has 40 places, 39 transitions, 123 flow [2024-12-02 05:49:46,535 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=123, PETRI_PLACES=40, PETRI_TRANSITIONS=39} [2024-12-02 05:49:46,536 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 2 predicate places. [2024-12-02 05:49:46,536 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 39 transitions, 123 flow [2024-12-02 05:49:46,536 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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 05:49:46,536 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 05:49:46,536 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 05:49:46,536 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-12-02 05:49:46,537 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 05:49:46,537 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 05:49:46,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1322813042, now seen corresponding path program 1 times [2024-12-02 05:49:46,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 05:49:46,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240679762] [2024-12-02 05:49:46,538 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 05:49:46,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 05:49:46,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 05:49:46,794 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 05:49:46,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 05:49:46,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240679762] [2024-12-02 05:49:46,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240679762] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 05:49:46,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665794785] [2024-12-02 05:49:46,795 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 05:49:46,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 05:49:46,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 05:49:46,797 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 05:49:46,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-12-02 05:49:46,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 05:49:46,923 INFO L256 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-12-02 05:49:46,926 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 05:49:47,021 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 05:49:47,021 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 05:49:47,113 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 05:49:47,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665794785] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 05:49:47,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 05:49:47,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-12-02 05:49:47,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508571355] [2024-12-02 05:49:47,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 05:49:47,114 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-12-02 05:49:47,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 05:49:47,115 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-12-02 05:49:47,115 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2024-12-02 05:49:47,158 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-12-02 05:49:47,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 39 transitions, 123 flow. Second operand has 12 states, 12 states have (on average 12.0) internal successors, (144), 12 states have internal predecessors, (144), 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 05:49:47,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 05:49:47,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-12-02 05:49:47,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 05:49:47,534 INFO L124 PetriNetUnfolderBase]: 899/1460 cut-off events. [2024-12-02 05:49:47,534 INFO L125 PetriNetUnfolderBase]: For 101/101 co-relation queries the response was YES. [2024-12-02 05:49:47,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2862 conditions, 1460 events. 899/1460 cut-off events. For 101/101 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 6037 event pairs, 398 based on Foata normal form. 0/1231 useless extension candidates. Maximal degree in co-relation 2092. Up to 681 conditions per place. [2024-12-02 05:49:47,541 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 36 selfloop transitions, 10 changer transitions 37/89 dead transitions. [2024-12-02 05:49:47,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 89 transitions, 430 flow [2024-12-02 05:49:47,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-12-02 05:49:47,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-12-02 05:49:47,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-12-02 05:49:47,543 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4672364672364672 [2024-12-02 05:49:47,543 INFO L175 Difference]: Start difference. First operand has 40 places, 39 transitions, 123 flow. Second operand 9 states and 164 transitions. [2024-12-02 05:49:47,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 89 transitions, 430 flow [2024-12-02 05:49:47,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 89 transitions, 428 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-12-02 05:49:47,546 INFO L231 Difference]: Finished difference. Result has 51 places, 42 transitions, 173 flow [2024-12-02 05:49:47,547 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=173, PETRI_PLACES=51, PETRI_TRANSITIONS=42} [2024-12-02 05:49:47,547 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 13 predicate places. [2024-12-02 05:49:47,547 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 42 transitions, 173 flow [2024-12-02 05:49:47,548 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.0) internal successors, (144), 12 states have internal predecessors, (144), 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 05:49:47,548 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 05:49:47,548 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 05:49:47,558 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-12-02 05:49:47,748 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 05:49:47,749 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 05:49:47,749 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 05:49:47,749 INFO L85 PathProgramCache]: Analyzing trace with hash -695485923, now seen corresponding path program 2 times [2024-12-02 05:49:47,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 05:49:47,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206955603] [2024-12-02 05:49:47,749 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 05:49:47,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 05:49:47,775 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-12-02 05:49:47,775 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 05:49:47,856 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-12-02 05:49:47,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 05:49:47,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206955603] [2024-12-02 05:49:47,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206955603] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 05:49:47,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 05:49:47,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 05:49:47,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932570796] [2024-12-02 05:49:47,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 05:49:47,857 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 05:49:47,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 05:49:47,857 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 05:49:47,857 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-12-02 05:49:47,869 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-12-02 05:49:47,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 42 transitions, 173 flow. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 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 05:49:47,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 05:49:47,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-12-02 05:49:47,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 05:49:48,128 INFO L124 PetriNetUnfolderBase]: 1119/1785 cut-off events. [2024-12-02 05:49:48,128 INFO L125 PetriNetUnfolderBase]: For 342/342 co-relation queries the response was YES. [2024-12-02 05:49:48,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3782 conditions, 1785 events. 1119/1785 cut-off events. For 342/342 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 8496 event pairs, 452 based on Foata normal form. 13/1590 useless extension candidates. Maximal degree in co-relation 3747. Up to 886 conditions per place. [2024-12-02 05:49:48,136 INFO L140 encePairwiseOnDemand]: 34/39 looper letters, 64 selfloop transitions, 3 changer transitions 14/87 dead transitions. [2024-12-02 05:49:48,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 87 transitions, 459 flow [2024-12-02 05:49:48,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 05:49:48,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-02 05:49:48,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-12-02 05:49:48,137 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6051282051282051 [2024-12-02 05:49:48,137 INFO L175 Difference]: Start difference. First operand has 51 places, 42 transitions, 173 flow. Second operand 5 states and 118 transitions. [2024-12-02 05:49:48,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 87 transitions, 459 flow [2024-12-02 05:49:48,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 87 transitions, 433 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-12-02 05:49:48,145 INFO L231 Difference]: Finished difference. Result has 50 places, 44 transitions, 177 flow [2024-12-02 05:49:48,146 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=177, PETRI_PLACES=50, PETRI_TRANSITIONS=44} [2024-12-02 05:49:48,146 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 12 predicate places. [2024-12-02 05:49:48,146 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 44 transitions, 177 flow [2024-12-02 05:49:48,147 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 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 05:49:48,147 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 05:49:48,147 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 05:49:48,147 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-12-02 05:49:48,147 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 05:49:48,147 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 05:49:48,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1580892275, now seen corresponding path program 3 times [2024-12-02 05:49:48,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 05:49:48,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509199724] [2024-12-02 05:49:48,148 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 05:49:48,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 05:49:48,183 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-12-02 05:49:48,183 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 05:49:48,268 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-12-02 05:49:48,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 05:49:48,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509199724] [2024-12-02 05:49:48,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509199724] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 05:49:48,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 05:49:48,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 05:49:48,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694073503] [2024-12-02 05:49:48,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 05:49:48,269 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 05:49:48,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 05:49:48,270 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 05:49:48,270 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-12-02 05:49:48,277 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-12-02 05:49:48,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 44 transitions, 177 flow. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 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 05:49:48,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 05:49:48,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-12-02 05:49:48,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 05:49:48,671 INFO L124 PetriNetUnfolderBase]: 1889/3087 cut-off events. [2024-12-02 05:49:48,672 INFO L125 PetriNetUnfolderBase]: For 1689/1689 co-relation queries the response was YES. [2024-12-02 05:49:48,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7350 conditions, 3087 events. 1889/3087 cut-off events. For 1689/1689 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 16738 event pairs, 800 based on Foata normal form. 14/2863 useless extension candidates. Maximal degree in co-relation 7317. Up to 1492 conditions per place. [2024-12-02 05:49:48,685 INFO L140 encePairwiseOnDemand]: 34/39 looper letters, 68 selfloop transitions, 3 changer transitions 13/90 dead transitions. [2024-12-02 05:49:48,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 90 transitions, 512 flow [2024-12-02 05:49:48,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 05:49:48,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-02 05:49:48,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 113 transitions. [2024-12-02 05:49:48,687 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5794871794871795 [2024-12-02 05:49:48,687 INFO L175 Difference]: Start difference. First operand has 50 places, 44 transitions, 177 flow. Second operand 5 states and 113 transitions. [2024-12-02 05:49:48,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 90 transitions, 512 flow [2024-12-02 05:49:48,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 90 transitions, 490 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-12-02 05:49:48,694 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 193 flow [2024-12-02 05:49:48,694 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=193, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2024-12-02 05:49:48,695 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 16 predicate places. [2024-12-02 05:49:48,695 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 193 flow [2024-12-02 05:49:48,695 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 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 05:49:48,695 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 05:49:48,695 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 05:49:48,695 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-12-02 05:49:48,696 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 05:49:48,696 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 05:49:48,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1704167259, now seen corresponding path program 4 times [2024-12-02 05:49:48,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 05:49:48,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807620080] [2024-12-02 05:49:48,696 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 05:49:48,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 05:49:48,711 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 05:49:48,711 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 05:49:48,741 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-12-02 05:49:48,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 05:49:48,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807620080] [2024-12-02 05:49:48,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807620080] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 05:49:48,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 05:49:48,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 05:49:48,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968522063] [2024-12-02 05:49:48,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 05:49:48,742 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 05:49:48,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 05:49:48,742 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 05:49:48,742 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-12-02 05:49:48,752 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-12-02 05:49:48,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 193 flow. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 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 05:49:48,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 05:49:48,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-12-02 05:49:48,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 05:49:49,370 INFO L124 PetriNetUnfolderBase]: 2519/4061 cut-off events. [2024-12-02 05:49:49,370 INFO L125 PetriNetUnfolderBase]: For 2879/2879 co-relation queries the response was YES. [2024-12-02 05:49:49,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10249 conditions, 4061 events. 2519/4061 cut-off events. For 2879/2879 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 23011 event pairs, 640 based on Foata normal form. 46/3759 useless extension candidates. Maximal degree in co-relation 10214. Up to 1714 conditions per place. [2024-12-02 05:49:49,404 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 98 selfloop transitions, 16 changer transitions 0/120 dead transitions. [2024-12-02 05:49:49,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 120 transitions, 705 flow [2024-12-02 05:49:49,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-12-02 05:49:49,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-12-02 05:49:49,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-12-02 05:49:49,405 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5224358974358975 [2024-12-02 05:49:49,405 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 193 flow. Second operand 8 states and 163 transitions. [2024-12-02 05:49:49,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 120 transitions, 705 flow [2024-12-02 05:49:49,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 120 transitions, 685 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-12-02 05:49:49,420 INFO L231 Difference]: Finished difference. Result has 61 places, 59 transitions, 301 flow [2024-12-02 05:49:49,420 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=301, PETRI_PLACES=61, PETRI_TRANSITIONS=59} [2024-12-02 05:49:49,420 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 23 predicate places. [2024-12-02 05:49:49,421 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 59 transitions, 301 flow [2024-12-02 05:49:49,421 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 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 05:49:49,421 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 05:49:49,421 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 05:49:49,421 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-12-02 05:49:49,421 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 05:49:49,421 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 05:49:49,422 INFO L85 PathProgramCache]: Analyzing trace with hash -2016300841, now seen corresponding path program 5 times [2024-12-02 05:49:49,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 05:49:49,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154339234] [2024-12-02 05:49:49,422 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 05:49:49,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 05:49:49,451 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 05:49:49,451 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 05:49:49,589 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 05:49:49,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 05:49:49,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154339234] [2024-12-02 05:49:49,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154339234] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 05:49:49,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335035492] [2024-12-02 05:49:49,590 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 05:49:49,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 05:49:49,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 05:49:49,593 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 05:49:49,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-12-02 05:49:49,741 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 05:49:49,742 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 05:49:49,744 INFO L256 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-12-02 05:49:49,746 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 05:49:49,826 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 05:49:49,827 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 05:49:49,904 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 05:49:49,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335035492] provided 1 perfect and 1 imperfect interpolant sequences [2024-12-02 05:49:49,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-12-02 05:49:49,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 11 [2024-12-02 05:49:49,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065853946] [2024-12-02 05:49:49,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 05:49:49,905 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 05:49:49,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 05:49:49,905 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 05:49:49,905 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2024-12-02 05:49:49,914 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-12-02 05:49:49,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 59 transitions, 301 flow. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 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 05:49:49,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 05:49:49,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-12-02 05:49:49,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 05:49:50,400 INFO L124 PetriNetUnfolderBase]: 2376/3769 cut-off events. [2024-12-02 05:49:50,400 INFO L125 PetriNetUnfolderBase]: For 6248/6322 co-relation queries the response was YES. [2024-12-02 05:49:50,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10885 conditions, 3769 events. 2376/3769 cut-off events. For 6248/6322 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 20424 event pairs, 555 based on Foata normal form. 122/3654 useless extension candidates. Maximal degree in co-relation 10848. Up to 2005 conditions per place. [2024-12-02 05:49:50,433 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 73 selfloop transitions, 7 changer transitions 0/86 dead transitions. [2024-12-02 05:49:50,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 86 transitions, 617 flow [2024-12-02 05:49:50,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 05:49:50,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-12-02 05:49:50,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 98 transitions. [2024-12-02 05:49:50,435 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4188034188034188 [2024-12-02 05:49:50,435 INFO L175 Difference]: Start difference. First operand has 61 places, 59 transitions, 301 flow. Second operand 6 states and 98 transitions. [2024-12-02 05:49:50,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 86 transitions, 617 flow [2024-12-02 05:49:50,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 86 transitions, 585 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-12-02 05:49:50,455 INFO L231 Difference]: Finished difference. Result has 64 places, 59 transitions, 302 flow [2024-12-02 05:49:50,456 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=302, PETRI_PLACES=64, PETRI_TRANSITIONS=59} [2024-12-02 05:49:50,456 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 26 predicate places. [2024-12-02 05:49:50,457 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 59 transitions, 302 flow [2024-12-02 05:49:50,457 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 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 05:49:50,457 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 05:49:50,457 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 05:49:50,467 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-12-02 05:49:50,659 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-12-02 05:49:50,659 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 05:49:50,660 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 05:49:50,660 INFO L85 PathProgramCache]: Analyzing trace with hash 423409504, now seen corresponding path program 1 times [2024-12-02 05:49:50,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 05:49:50,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069856486] [2024-12-02 05:49:50,660 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 05:49:50,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 05:49:50,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 05:49:50,861 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 05:49:50,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 05:49:50,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069856486] [2024-12-02 05:49:50,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069856486] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 05:49:50,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076142196] [2024-12-02 05:49:50,862 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 05:49:50,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 05:49:50,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 05:49:50,864 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 05:49:50,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-12-02 05:49:50,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 05:49:50,981 INFO L256 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-12-02 05:49:50,983 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 05:49:51,046 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 05:49:51,046 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 05:49:51,125 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 05:49:51,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076142196] provided 1 perfect and 1 imperfect interpolant sequences [2024-12-02 05:49:51,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-12-02 05:49:51,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 12 [2024-12-02 05:49:51,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076263387] [2024-12-02 05:49:51,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 05:49:51,125 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 05:49:51,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 05:49:51,126 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 05:49:51,126 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2024-12-02 05:49:51,139 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2024-12-02 05:49:51,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 59 transitions, 302 flow. Second operand has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 05:49:51,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 05:49:51,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2024-12-02 05:49:51,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 05:49:51,436 INFO L124 PetriNetUnfolderBase]: 1260/2174 cut-off events. [2024-12-02 05:49:51,436 INFO L125 PetriNetUnfolderBase]: For 3679/3702 co-relation queries the response was YES. [2024-12-02 05:49:51,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6122 conditions, 2174 events. 1260/2174 cut-off events. For 3679/3702 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 11621 event pairs, 466 based on Foata normal form. 172/2203 useless extension candidates. Maximal degree in co-relation 6081. Up to 1217 conditions per place. [2024-12-02 05:49:51,453 INFO L140 encePairwiseOnDemand]: 34/39 looper letters, 50 selfloop transitions, 9 changer transitions 0/67 dead transitions. [2024-12-02 05:49:51,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 67 transitions, 431 flow [2024-12-02 05:49:51,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 05:49:51,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-12-02 05:49:51,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-12-02 05:49:51,455 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44871794871794873 [2024-12-02 05:49:51,455 INFO L175 Difference]: Start difference. First operand has 64 places, 59 transitions, 302 flow. Second operand 6 states and 105 transitions. [2024-12-02 05:49:51,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 67 transitions, 431 flow [2024-12-02 05:49:51,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 67 transitions, 417 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-12-02 05:49:51,464 INFO L231 Difference]: Finished difference. Result has 64 places, 54 transitions, 271 flow [2024-12-02 05:49:51,464 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=271, PETRI_PLACES=64, PETRI_TRANSITIONS=54} [2024-12-02 05:49:51,465 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 26 predicate places. [2024-12-02 05:49:51,465 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 54 transitions, 271 flow [2024-12-02 05:49:51,465 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 05:49:51,465 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 05:49:51,465 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 05:49:51,476 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-12-02 05:49:51,666 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-12-02 05:49:51,666 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 05:49:51,666 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 05:49:51,666 INFO L85 PathProgramCache]: Analyzing trace with hash -429779358, now seen corresponding path program 1 times [2024-12-02 05:49:51,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 05:49:51,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885947428] [2024-12-02 05:49:51,667 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 05:49:51,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 05:49:51,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 05:49:51,948 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-12-02 05:49:51,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 05:49:51,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885947428] [2024-12-02 05:49:51,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885947428] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 05:49:51,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 05:49:51,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 05:49:51,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374992675] [2024-12-02 05:49:51,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 05:49:51,949 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 05:49:51,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 05:49:51,950 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 05:49:51,950 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-12-02 05:49:51,973 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-12-02 05:49:51,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 54 transitions, 271 flow. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 05:49:51,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 05:49:51,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-12-02 05:49:51,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 05:49:52,332 INFO L124 PetriNetUnfolderBase]: 1761/2654 cut-off events. [2024-12-02 05:49:52,333 INFO L125 PetriNetUnfolderBase]: For 3493/3519 co-relation queries the response was YES. [2024-12-02 05:49:52,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7992 conditions, 2654 events. 1761/2654 cut-off events. For 3493/3519 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 11656 event pairs, 448 based on Foata normal form. 79/2708 useless extension candidates. Maximal degree in co-relation 7951. Up to 1981 conditions per place. [2024-12-02 05:49:52,345 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 84 selfloop transitions, 9 changer transitions 8/106 dead transitions. [2024-12-02 05:49:52,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 106 transitions, 727 flow [2024-12-02 05:49:52,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 05:49:52,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-12-02 05:49:52,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-12-02 05:49:52,346 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47435897435897434 [2024-12-02 05:49:52,346 INFO L175 Difference]: Start difference. First operand has 64 places, 54 transitions, 271 flow. Second operand 6 states and 111 transitions. [2024-12-02 05:49:52,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 106 transitions, 727 flow [2024-12-02 05:49:52,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 106 transitions, 681 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-12-02 05:49:52,356 INFO L231 Difference]: Finished difference. Result has 68 places, 63 transitions, 324 flow [2024-12-02 05:49:52,356 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=324, PETRI_PLACES=68, PETRI_TRANSITIONS=63} [2024-12-02 05:49:52,357 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 30 predicate places. [2024-12-02 05:49:52,357 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 63 transitions, 324 flow [2024-12-02 05:49:52,357 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 05:49:52,357 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 05:49:52,357 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 05:49:52,357 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-12-02 05:49:52,357 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 05:49:52,358 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 05:49:52,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1926347762, now seen corresponding path program 2 times [2024-12-02 05:49:52,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 05:49:52,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462079084] [2024-12-02 05:49:52,358 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 05:49:52,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 05:49:52,452 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 05:49:52,452 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 05:49:54,625 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 05:49:54,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 05:49:54,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462079084] [2024-12-02 05:49:54,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462079084] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 05:49:54,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266392341] [2024-12-02 05:49:54,625 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 05:49:54,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 05:49:54,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 05:49:54,627 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 05:49:54,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-12-02 05:49:54,751 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 05:49:54,751 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 05:49:54,753 INFO L256 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-12-02 05:49:54,757 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 05:49:55,651 INFO L349 Elim1Store]: treesize reduction 40, result has 43.7 percent of original size [2024-12-02 05:49:55,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 128 treesize of output 93 [2024-12-02 05:50:09,102 WARN L286 SmtUtils]: Spent 9.49s on a formula simplification that was a NOOP. DAG size: 1084 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2024-12-02 05:50:09,103 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 05:50:09,104 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 38 select indices, 38 select index equivalence classes, 1 disjoint index pairs (out of 703 index pairs), introduced 38 new quantified variables, introduced 703 case distinctions, treesize of input 734 treesize of output 3090 [2024-12-02 05:57:32,539 WARN L286 SmtUtils]: Spent 6.53s on a formula simplification. DAG size of input: 972 DAG size of output: 1028 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-12-02 05:57:41,605 WARN L286 SmtUtils]: Spent 6.18s on a formula simplification. DAG size of input: 970 DAG size of output: 1013 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-12-02 05:57:57,590 WARN L286 SmtUtils]: Spent 7.94s on a formula simplification. DAG size of input: 956 DAG size of output: 1006 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-12-02 05:58:07,320 WARN L286 SmtUtils]: Spent 7.06s on a formula simplification. DAG size of input: 954 DAG size of output: 1001 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-12-02 05:58:23,252 WARN L286 SmtUtils]: Spent 14.64s on a formula simplification. DAG size of input: 923 DAG size of output: 971 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-12-02 05:59:42,767 WARN L249 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) stderr output: (error "out of memory") [2024-12-02 05:59:42,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 101 [2024-12-02 05:59:42,768 WARN L320 FreeRefinementEngine]: Global settings require throwing the following exception [2024-12-02 05:59:42,774 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-12-02 05:59:42,969 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-12-02 05:59:42,969 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseSuccess(Executor.java:277) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.assertTerm(Scriptor.java:147) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.assertTerm(DiffWrapperScript.java:111) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.assertTerm(WrapperScript.java:158) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.simplify(SimplifyDDA2.java:584) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:245) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplifyWithStatistics(SmtUtils.java:318) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify(QuantifierPusher.java:728) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:133) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.pushMinionEliminatees(QuantifierPushUtilsForSubsetPush.java:255) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:337) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:189) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:283) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:51) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:234) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:416) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:195) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:291) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:181) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:160) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:106) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:317) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:428) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:314) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:238) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:132) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1518) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:701) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:258) ... 59 more [2024-12-02 05:59:42,974 INFO L158 Benchmark]: Toolchain (without parser) took 599234.85ms. Allocated memory was 142.6MB in the beginning and 427.8MB in the end (delta: 285.2MB). Free memory was 116.4MB in the beginning and 354.0MB in the end (delta: -237.6MB). Peak memory consumption was 267.0MB. Max. memory is 16.1GB. [2024-12-02 05:59:42,974 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 142.6MB. Free memory is still 82.6MB. There was no memory consumed. Max. memory is 16.1GB. [2024-12-02 05:59:42,975 INFO L158 Benchmark]: CACSL2BoogieTranslator took 254.25ms. Allocated memory is still 142.6MB. Free memory was 116.3MB in the beginning and 103.7MB in the end (delta: 12.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-12-02 05:59:42,975 INFO L158 Benchmark]: Boogie Procedure Inliner took 41.57ms. Allocated memory is still 142.6MB. Free memory was 103.7MB in the beginning and 101.6MB in the end (delta: 2.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-12-02 05:59:42,975 INFO L158 Benchmark]: Boogie Preprocessor took 54.08ms. Allocated memory is still 142.6MB. Free memory was 101.6MB in the beginning and 98.9MB in the end (delta: 2.7MB). There was no memory consumed. Max. memory is 16.1GB. [2024-12-02 05:59:42,975 INFO L158 Benchmark]: RCFGBuilder took 874.19ms. Allocated memory is still 142.6MB. Free memory was 98.9MB in the beginning and 80.0MB in the end (delta: 18.9MB). Peak memory consumption was 47.7MB. Max. memory is 16.1GB. [2024-12-02 05:59:42,976 INFO L158 Benchmark]: TraceAbstraction took 598005.66ms. Allocated memory was 142.6MB in the beginning and 427.8MB in the end (delta: 285.2MB). Free memory was 79.4MB in the beginning and 354.0MB in the end (delta: -274.6MB). Peak memory consumption was 227.7MB. Max. memory is 16.1GB. [2024-12-02 05:59:42,977 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 142.6MB. Free memory is still 82.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 254.25ms. Allocated memory is still 142.6MB. Free memory was 116.3MB in the beginning and 103.7MB in the end (delta: 12.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 41.57ms. Allocated memory is still 142.6MB. Free memory was 103.7MB in the beginning and 101.6MB in the end (delta: 2.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 54.08ms. Allocated memory is still 142.6MB. Free memory was 101.6MB in the beginning and 98.9MB in the end (delta: 2.7MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 874.19ms. Allocated memory is still 142.6MB. Free memory was 98.9MB in the beginning and 80.0MB in the end (delta: 18.9MB). Peak memory consumption was 47.7MB. Max. memory is 16.1GB. * TraceAbstraction took 598005.66ms. Allocated memory was 142.6MB in the beginning and 427.8MB in the end (delta: 285.2MB). Free memory was 79.4MB in the beginning and 354.0MB in the end (delta: -274.6MB). Peak memory consumption was 227.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/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_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/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 670814d0a16da58b0f26835e20c05a244e2f373856f13b9d4ff2a931783edf81 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-12-02 05:59:44,762 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-12-02 05:59:44,844 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2024-12-02 05:59:44,851 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-12-02 05:59:44,851 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-12-02 05:59:44,874 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-12-02 05:59:44,875 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-12-02 05:59:44,875 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-12-02 05:59:44,876 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-12-02 05:59:44,876 INFO L153 SettingsManager]: * Use memory slicer=true [2024-12-02 05:59:44,876 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-12-02 05:59:44,876 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-12-02 05:59:44,876 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-12-02 05:59:44,877 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-12-02 05:59:44,877 INFO L153 SettingsManager]: * Use SBE=true [2024-12-02 05:59:44,877 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-12-02 05:59:44,877 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-12-02 05:59:44,877 INFO L153 SettingsManager]: * sizeof long=4 [2024-12-02 05:59:44,877 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-12-02 05:59:44,877 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-12-02 05:59:44,877 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-12-02 05:59:44,878 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-12-02 05:59:44,878 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-12-02 05:59:44,878 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-12-02 05:59:44,878 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-12-02 05:59:44,878 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-12-02 05:59:44,878 INFO L153 SettingsManager]: * sizeof long double=12 [2024-12-02 05:59:44,878 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-12-02 05:59:44,878 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-12-02 05:59:44,878 INFO L153 SettingsManager]: * Use constant arrays=true [2024-12-02 05:59:44,878 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-12-02 05:59:44,878 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 05:59:44,878 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 05:59:44,878 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 05:59:44,879 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 05:59:44,879 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-12-02 05:59:44,879 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 05:59:44,879 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 05:59:44,879 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 05:59:44,879 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 05:59:44,879 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-12-02 05:59:44,879 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-12-02 05:59:44,879 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-12-02 05:59:44,879 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-12-02 05:59:44,879 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2024-12-02 05:59:44,880 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-12-02 05:59:44,880 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-12-02 05:59:44,880 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-12-02 05:59:44,880 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-12-02 05:59:44,880 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-12-02 05:59:44,880 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_0bf5681a-c94f-477a-9e74-dddab0e113b9/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 -> 670814d0a16da58b0f26835e20c05a244e2f373856f13b9d4ff2a931783edf81 [2024-12-02 05:59:45,130 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-12-02 05:59:45,136 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-12-02 05:59:45,138 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-12-02 05:59:45,139 INFO L270 PluginConnector]: Initializing CDTParser... [2024-12-02 05:59:45,140 INFO L274 PluginConnector]: CDTParser initialized [2024-12-02 05:59:45,141 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/../../sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c [2024-12-02 05:59:47,760 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/data/bc170a90f/1e23292aba41478e90a577df22f963d9/FLAG820d9d07b [2024-12-02 05:59:47,994 INFO L384 CDTParser]: Found 1 translation units. [2024-12-02 05:59:47,995 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c [2024-12-02 05:59:48,003 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/data/bc170a90f/1e23292aba41478e90a577df22f963d9/FLAG820d9d07b [2024-12-02 05:59:48,353 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/data/bc170a90f/1e23292aba41478e90a577df22f963d9 [2024-12-02 05:59:48,355 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-12-02 05:59:48,356 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-12-02 05:59:48,357 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-12-02 05:59:48,357 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-12-02 05:59:48,360 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-12-02 05:59:48,360 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:59:48" (1/1) ... [2024-12-02 05:59:48,361 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64c676b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:59:48, skipping insertion in model container [2024-12-02 05:59:48,361 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:59:48" (1/1) ... [2024-12-02 05:59:48,375 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-12-02 05:59:48,529 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_0bf5681a-c94f-477a-9e74-dddab0e113b9/sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c[2862,2875] [2024-12-02 05:59:48,535 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-12-02 05:59:48,539 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 05:59:48,548 INFO L200 MainTranslator]: Completed pre-run [2024-12-02 05:59:48,566 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_0bf5681a-c94f-477a-9e74-dddab0e113b9/sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c[2862,2875] [2024-12-02 05:59:48,570 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 05:59:48,585 INFO L204 MainTranslator]: Completed translation [2024-12-02 05:59:48,585 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:59:48 WrapperNode [2024-12-02 05:59:48,585 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-12-02 05:59:48,586 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-12-02 05:59:48,587 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-12-02 05:59:48,587 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-12-02 05:59:48,593 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:59:48" (1/1) ... [2024-12-02 05:59:48,602 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:59:48" (1/1) ... [2024-12-02 05:59:48,623 INFO L138 Inliner]: procedures = 27, calls = 42, calls flagged for inlining = 14, calls inlined = 22, statements flattened = 211 [2024-12-02 05:59:48,623 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-12-02 05:59:48,624 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-12-02 05:59:48,624 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-12-02 05:59:48,624 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-12-02 05:59:48,631 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:59:48" (1/1) ... [2024-12-02 05:59:48,631 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:59:48" (1/1) ... [2024-12-02 05:59:48,636 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:59:48" (1/1) ... [2024-12-02 05:59:48,653 INFO L175 MemorySlicer]: Split 18 memory accesses to 2 slices as follows [2, 16]. 89 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 4 writes are split as follows [0, 4]. [2024-12-02 05:59:48,654 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:59:48" (1/1) ... [2024-12-02 05:59:48,654 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:59:48" (1/1) ... [2024-12-02 05:59:48,664 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:59:48" (1/1) ... [2024-12-02 05:59:48,666 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:59:48" (1/1) ... [2024-12-02 05:59:48,670 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:59:48" (1/1) ... [2024-12-02 05:59:48,671 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:59:48" (1/1) ... [2024-12-02 05:59:48,672 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:59:48" (1/1) ... [2024-12-02 05:59:48,674 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-12-02 05:59:48,675 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-12-02 05:59:48,675 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-12-02 05:59:48,676 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-12-02 05:59:48,676 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:59:48" (1/1) ... [2024-12-02 05:59:48,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 05:59:48,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 05:59:48,705 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-12-02 05:59:48,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-12-02 05:59:48,725 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-12-02 05:59:48,725 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-12-02 05:59:48,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-12-02 05:59:48,726 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-12-02 05:59:48,726 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-12-02 05:59:48,726 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-12-02 05:59:48,726 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-12-02 05:59:48,726 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-12-02 05:59:48,726 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-12-02 05:59:48,726 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-12-02 05:59:48,726 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-12-02 05:59:48,726 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-12-02 05:59:48,726 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-12-02 05:59:48,726 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-12-02 05:59:48,726 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-12-02 05:59:48,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-12-02 05:59:48,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-12-02 05:59:48,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2024-12-02 05:59:48,728 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 05:59:48,824 INFO L234 CfgBuilder]: Building ICFG [2024-12-02 05:59:48,826 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-12-02 05:59:49,312 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-12-02 05:59:49,313 INFO L283 CfgBuilder]: Performing block encoding [2024-12-02 05:59:49,679 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-12-02 05:59:49,679 INFO L312 CfgBuilder]: Removed 6 assume(true) statements. [2024-12-02 05:59:49,680 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:59:49 BoogieIcfgContainer [2024-12-02 05:59:49,680 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-12-02 05:59:49,681 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-12-02 05:59:49,681 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-12-02 05:59:49,685 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-12-02 05:59:49,685 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 05:59:48" (1/3) ... [2024-12-02 05:59:49,685 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@703f3053 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:59:49, skipping insertion in model container [2024-12-02 05:59:49,686 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:59:48" (2/3) ... [2024-12-02 05:59:49,686 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@703f3053 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:59:49, skipping insertion in model container [2024-12-02 05:59:49,686 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:59:49" (3/3) ... [2024-12-02 05:59:49,687 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-three-array-max.wvr.c [2024-12-02 05:59:49,698 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-12-02 05:59:49,700 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-three-array-max.wvr.c that has 4 procedures, 33 locations, 1 initial locations, 6 loop locations, and 1 error locations. [2024-12-02 05:59:49,700 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-12-02 05:59:49,749 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-12-02 05:59:49,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 42 places, 39 transitions, 99 flow [2024-12-02 05:59:49,805 INFO L124 PetriNetUnfolderBase]: 7/36 cut-off events. [2024-12-02 05:59:49,806 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-12-02 05:59:49,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 36 events. 7/36 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 43 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 26. Up to 2 conditions per place. [2024-12-02 05:59:49,809 INFO L82 GeneralOperation]: Start removeDead. Operand has 42 places, 39 transitions, 99 flow [2024-12-02 05:59:49,812 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 38 places, 35 transitions, 88 flow [2024-12-02 05:59:49,818 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-12-02 05:59:49,828 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;@585d1416, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-12-02 05:59:49,829 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-12-02 05:59:49,842 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-12-02 05:59:49,842 INFO L124 PetriNetUnfolderBase]: 7/34 cut-off events. [2024-12-02 05:59:49,842 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-12-02 05:59:49,842 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 05:59:49,843 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 05:59:49,843 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 05:59:49,847 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 05:59:49,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1559889122, now seen corresponding path program 1 times [2024-12-02 05:59:49,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 05:59:49,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [653173753] [2024-12-02 05:59:49,857 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 05:59:49,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 05:59:49,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 05:59:49,859 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 05:59:49,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-12-02 05:59:50,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 05:59:50,010 INFO L256 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-12-02 05:59:50,014 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 05:59:50,087 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 05:59:50,087 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 05:59:50,088 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 05:59:50,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653173753] [2024-12-02 05:59:50,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653173753] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 05:59:50,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 05:59:50,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 05:59:50,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311880157] [2024-12-02 05:59:50,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 05:59:50,097 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 05:59:50,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 05:59:50,124 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 05:59:50,124 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 05:59:50,134 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2024-12-02 05:59:50,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 35 transitions, 88 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 05:59:50,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 05:59:50,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2024-12-02 05:59:50,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 05:59:50,435 INFO L124 PetriNetUnfolderBase]: 378/600 cut-off events. [2024-12-02 05:59:50,435 INFO L125 PetriNetUnfolderBase]: For 49/49 co-relation queries the response was YES. [2024-12-02 05:59:50,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1183 conditions, 600 events. 378/600 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2166 event pairs, 251 based on Foata normal form. 0/519 useless extension candidates. Maximal degree in co-relation 993. Up to 520 conditions per place. [2024-12-02 05:59:50,444 INFO L140 encePairwiseOnDemand]: 36/39 looper letters, 27 selfloop transitions, 2 changer transitions 0/36 dead transitions. [2024-12-02 05:59:50,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 36 transitions, 148 flow [2024-12-02 05:59:50,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 05:59:50,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 05:59:50,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 60 transitions. [2024-12-02 05:59:50,457 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5128205128205128 [2024-12-02 05:59:50,458 INFO L175 Difference]: Start difference. First operand has 38 places, 35 transitions, 88 flow. Second operand 3 states and 60 transitions. [2024-12-02 05:59:50,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 36 transitions, 148 flow [2024-12-02 05:59:50,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 36 transitions, 136 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-12-02 05:59:50,467 INFO L231 Difference]: Finished difference. Result has 35 places, 36 transitions, 88 flow [2024-12-02 05:59:50,469 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=35, PETRI_TRANSITIONS=36} [2024-12-02 05:59:50,472 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, -3 predicate places. [2024-12-02 05:59:50,472 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 36 transitions, 88 flow [2024-12-02 05:59:50,472 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 05:59:50,472 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 05:59:50,472 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 05:59:50,480 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-12-02 05:59:50,673 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 05:59:50,673 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 05:59:50,674 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 05:59:50,674 INFO L85 PathProgramCache]: Analyzing trace with hash 129434060, now seen corresponding path program 1 times [2024-12-02 05:59:50,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 05:59:50,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [505042952] [2024-12-02 05:59:50,675 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 05:59:50,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 05:59:50,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 05:59:50,676 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 05:59:50,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-12-02 05:59:50,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 05:59:50,805 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-12-02 05:59:50,807 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 05:59:50,911 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 05:59:50,911 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 05:59:51,028 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 05:59:51,029 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 05:59:51,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505042952] [2024-12-02 05:59:51,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505042952] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 05:59:51,029 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-12-02 05:59:51,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2024-12-02 05:59:51,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065987993] [2024-12-02 05:59:51,029 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-12-02 05:59:51,030 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-12-02 05:59:51,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 05:59:51,031 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-12-02 05:59:51,031 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-12-02 05:59:51,064 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2024-12-02 05:59:51,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 36 transitions, 88 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 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 05:59:51,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 05:59:51,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2024-12-02 05:59:51,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 05:59:51,938 INFO L124 PetriNetUnfolderBase]: 763/1218 cut-off events. [2024-12-02 05:59:51,939 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2024-12-02 05:59:51,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2323 conditions, 1218 events. 763/1218 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 5247 event pairs, 502 based on Foata normal form. 0/1048 useless extension candidates. Maximal degree in co-relation 2312. Up to 521 conditions per place. [2024-12-02 05:59:51,948 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 48 selfloop transitions, 28 changer transitions 0/83 dead transitions. [2024-12-02 05:59:51,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 83 transitions, 352 flow [2024-12-02 05:59:51,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-12-02 05:59:51,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-12-02 05:59:51,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-12-02 05:59:51,952 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5128205128205128 [2024-12-02 05:59:51,952 INFO L175 Difference]: Start difference. First operand has 35 places, 36 transitions, 88 flow. Second operand 8 states and 160 transitions. [2024-12-02 05:59:51,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 83 transitions, 352 flow [2024-12-02 05:59:51,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 83 transitions, 348 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-12-02 05:59:51,955 INFO L231 Difference]: Finished difference. Result has 41 places, 62 transitions, 216 flow [2024-12-02 05:59:51,956 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=216, PETRI_PLACES=41, PETRI_TRANSITIONS=62} [2024-12-02 05:59:51,956 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 3 predicate places. [2024-12-02 05:59:51,957 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 62 transitions, 216 flow [2024-12-02 05:59:51,957 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 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 05:59:51,957 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 05:59:51,957 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 05:59:51,967 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-12-02 05:59:52,157 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 05:59:52,158 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 05:59:52,158 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 05:59:52,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1176905417, now seen corresponding path program 1 times [2024-12-02 05:59:52,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 05:59:52,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [658942748] [2024-12-02 05:59:52,159 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 05:59:52,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 05:59:52,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 05:59:52,161 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 05:59:52,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-12-02 05:59:52,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 05:59:52,469 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-12-02 05:59:52,471 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 05:59:52,527 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 05:59:52,528 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 36 [2024-12-02 05:59:52,960 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 05:59:52,960 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 05:59:52,960 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 05:59:52,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658942748] [2024-12-02 05:59:52,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658942748] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 05:59:52,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 05:59:52,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 05:59:52,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375972166] [2024-12-02 05:59:52,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 05:59:52,961 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 05:59:52,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 05:59:52,962 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 05:59:52,962 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 05:59:52,962 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2024-12-02 05:59:52,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 62 transitions, 216 flow. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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 05:59:52,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 05:59:52,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2024-12-02 05:59:52,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 05:59:53,458 INFO L124 PetriNetUnfolderBase]: 1259/1986 cut-off events. [2024-12-02 05:59:53,459 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-12-02 05:59:53,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3821 conditions, 1986 events. 1259/1986 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 9618 event pairs, 344 based on Foata normal form. 2/1702 useless extension candidates. Maximal degree in co-relation 1910. Up to 1069 conditions per place. [2024-12-02 05:59:53,471 INFO L140 encePairwiseOnDemand]: 35/39 looper letters, 69 selfloop transitions, 3 changer transitions 1/80 dead transitions. [2024-12-02 05:59:53,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 80 transitions, 403 flow [2024-12-02 05:59:53,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 05:59:53,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 05:59:53,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 77 transitions. [2024-12-02 05:59:53,474 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6581196581196581 [2024-12-02 05:59:53,474 INFO L175 Difference]: Start difference. First operand has 41 places, 62 transitions, 216 flow. Second operand 3 states and 77 transitions. [2024-12-02 05:59:53,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 80 transitions, 403 flow [2024-12-02 05:59:53,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 80 transitions, 385 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-12-02 05:59:53,477 INFO L231 Difference]: Finished difference. Result has 43 places, 64 transitions, 217 flow [2024-12-02 05:59:53,477 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=217, PETRI_PLACES=43, PETRI_TRANSITIONS=64} [2024-12-02 05:59:53,478 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 5 predicate places. [2024-12-02 05:59:53,478 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 64 transitions, 217 flow [2024-12-02 05:59:53,478 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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 05:59:53,479 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 05:59:53,479 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 05:59:53,487 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-12-02 05:59:53,679 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 05:59:53,679 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 05:59:53,680 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 05:59:53,680 INFO L85 PathProgramCache]: Analyzing trace with hash 768456811, now seen corresponding path program 1 times [2024-12-02 05:59:53,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 05:59:53,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [368081320] [2024-12-02 05:59:53,680 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 05:59:53,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 05:59:53,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 05:59:53,682 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 05:59:53,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-12-02 05:59:53,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 05:59:53,785 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 05:59:53,787 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 05:59:53,958 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 05:59:53,959 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 05:59:53,959 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 05:59:53,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368081320] [2024-12-02 05:59:53,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368081320] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 05:59:53,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 05:59:53,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 05:59:53,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559586102] [2024-12-02 05:59:53,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 05:59:53,960 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 05:59:53,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 05:59:53,960 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 05:59:53,960 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-12-02 05:59:53,977 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2024-12-02 05:59:53,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 64 transitions, 217 flow. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 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 05:59:53,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 05:59:53,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2024-12-02 05:59:53,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 05:59:54,494 INFO L124 PetriNetUnfolderBase]: 1657/2600 cut-off events. [2024-12-02 05:59:54,494 INFO L125 PetriNetUnfolderBase]: For 334/334 co-relation queries the response was YES. [2024-12-02 05:59:54,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5538 conditions, 2600 events. 1657/2600 cut-off events. For 334/334 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 13069 event pairs, 682 based on Foata normal form. 28/2484 useless extension candidates. Maximal degree in co-relation 2715. Up to 1652 conditions per place. [2024-12-02 05:59:54,504 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 84 selfloop transitions, 12 changer transitions 0/103 dead transitions. [2024-12-02 05:59:54,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 103 transitions, 513 flow [2024-12-02 05:59:54,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 05:59:54,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-12-02 05:59:54,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 124 transitions. [2024-12-02 05:59:54,506 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5299145299145299 [2024-12-02 05:59:54,506 INFO L175 Difference]: Start difference. First operand has 43 places, 64 transitions, 217 flow. Second operand 6 states and 124 transitions. [2024-12-02 05:59:54,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 103 transitions, 513 flow [2024-12-02 05:59:54,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 103 transitions, 506 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-12-02 05:59:54,509 INFO L231 Difference]: Finished difference. Result has 49 places, 73 transitions, 284 flow [2024-12-02 05:59:54,510 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=284, PETRI_PLACES=49, PETRI_TRANSITIONS=73} [2024-12-02 05:59:54,510 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 11 predicate places. [2024-12-02 05:59:54,510 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 73 transitions, 284 flow [2024-12-02 05:59:54,511 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 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 05:59:54,511 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 05:59:54,511 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 05:59:54,520 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-12-02 05:59:54,711 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 05:59:54,712 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 05:59:54,712 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 05:59:54,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1980131239, now seen corresponding path program 2 times [2024-12-02 05:59:54,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 05:59:54,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [301821769] [2024-12-02 05:59:54,713 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 05:59:54,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 05:59:54,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 05:59:54,715 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 05:59:54,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-12-02 05:59:54,835 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 05:59:54,835 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 05:59:54,839 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 05:59:54,840 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 05:59:54,937 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 05:59:54,937 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 05:59:54,978 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 05:59:54,978 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 05:59:54,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301821769] [2024-12-02 05:59:54,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301821769] provided 1 perfect and 1 imperfect interpolant sequences [2024-12-02 05:59:54,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 05:59:54,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2024-12-02 05:59:54,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679284208] [2024-12-02 05:59:54,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 05:59:54,979 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 05:59:54,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 05:59:54,979 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 05:59:54,979 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-12-02 05:59:54,989 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-12-02 05:59:54,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 73 transitions, 284 flow. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 05:59:54,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 05:59:54,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-12-02 05:59:54,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 05:59:55,637 INFO L124 PetriNetUnfolderBase]: 2447/3776 cut-off events. [2024-12-02 05:59:55,637 INFO L125 PetriNetUnfolderBase]: For 2018/2154 co-relation queries the response was YES. [2024-12-02 05:59:55,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9813 conditions, 3776 events. 2447/3776 cut-off events. For 2018/2154 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 19786 event pairs, 362 based on Foata normal form. 86/3696 useless extension candidates. Maximal degree in co-relation 5938. Up to 781 conditions per place. [2024-12-02 05:59:55,665 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 111 selfloop transitions, 23 changer transitions 0/140 dead transitions. [2024-12-02 05:59:55,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 140 transitions, 761 flow [2024-12-02 05:59:55,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-12-02 05:59:55,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-12-02 05:59:55,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-12-02 05:59:55,667 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-12-02 05:59:55,667 INFO L175 Difference]: Start difference. First operand has 49 places, 73 transitions, 284 flow. Second operand 7 states and 156 transitions. [2024-12-02 05:59:55,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 140 transitions, 761 flow [2024-12-02 05:59:55,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 140 transitions, 744 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-12-02 05:59:55,676 INFO L231 Difference]: Finished difference. Result has 56 places, 86 transitions, 394 flow [2024-12-02 05:59:55,676 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=394, PETRI_PLACES=56, PETRI_TRANSITIONS=86} [2024-12-02 05:59:55,677 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 18 predicate places. [2024-12-02 05:59:55,677 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 86 transitions, 394 flow [2024-12-02 05:59:55,677 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 05:59:55,677 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 05:59:55,677 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 05:59:55,689 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-12-02 05:59:55,878 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 05:59:55,878 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 05:59:55,878 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 05:59:55,878 INFO L85 PathProgramCache]: Analyzing trace with hash -802042015, now seen corresponding path program 3 times [2024-12-02 05:59:55,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 05:59:55,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1375774865] [2024-12-02 05:59:55,879 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 05:59:55,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 05:59:55,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 05:59:55,880 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 05:59:55,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-12-02 05:59:55,984 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-12-02 05:59:55,984 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 05:59:55,988 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 05:59:55,989 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 05:59:56,089 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 05:59:56,090 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 05:59:56,090 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 05:59:56,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375774865] [2024-12-02 05:59:56,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375774865] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 05:59:56,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 05:59:56,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 05:59:56,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716801840] [2024-12-02 05:59:56,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 05:59:56,090 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 05:59:56,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 05:59:56,091 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 05:59:56,091 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-12-02 05:59:56,102 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2024-12-02 05:59:56,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 86 transitions, 394 flow. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 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 05:59:56,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 05:59:56,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2024-12-02 05:59:56,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 05:59:56,956 INFO L124 PetriNetUnfolderBase]: 3731/6006 cut-off events. [2024-12-02 05:59:56,956 INFO L125 PetriNetUnfolderBase]: For 7878/7972 co-relation queries the response was YES. [2024-12-02 05:59:56,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17019 conditions, 6006 events. 3731/6006 cut-off events. For 7878/7972 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 36229 event pairs, 1066 based on Foata normal form. 30/5710 useless extension candidates. Maximal degree in co-relation 9206. Up to 2608 conditions per place. [2024-12-02 05:59:56,997 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 115 selfloop transitions, 12 changer transitions 0/137 dead transitions. [2024-12-02 05:59:56,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 137 transitions, 872 flow [2024-12-02 05:59:56,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 05:59:56,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-12-02 05:59:56,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 125 transitions. [2024-12-02 05:59:56,999 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5341880341880342 [2024-12-02 05:59:56,999 INFO L175 Difference]: Start difference. First operand has 56 places, 86 transitions, 394 flow. Second operand 6 states and 125 transitions. [2024-12-02 05:59:56,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 137 transitions, 872 flow [2024-12-02 05:59:57,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 137 transitions, 862 flow, removed 5 selfloop flow, removed 0 redundant places. [2024-12-02 05:59:57,045 INFO L231 Difference]: Finished difference. Result has 64 places, 92 transitions, 479 flow [2024-12-02 05:59:57,045 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=479, PETRI_PLACES=64, PETRI_TRANSITIONS=92} [2024-12-02 05:59:57,046 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 26 predicate places. [2024-12-02 05:59:57,046 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 92 transitions, 479 flow [2024-12-02 05:59:57,046 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 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 05:59:57,046 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 05:59:57,046 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 05:59:57,056 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-12-02 05:59:57,247 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 05:59:57,247 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 05:59:57,247 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 05:59:57,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1786981597, now seen corresponding path program 4 times [2024-12-02 05:59:57,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 05:59:57,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [646369927] [2024-12-02 05:59:57,248 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 05:59:57,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 05:59:57,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 05:59:57,250 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 05:59:57,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-12-02 05:59:57,319 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 05:59:57,319 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 05:59:57,321 INFO L256 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-12-02 05:59:57,322 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 05:59:57,362 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 05:59:57,362 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 05:59:57,362 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 05:59:57,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646369927] [2024-12-02 05:59:57,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646369927] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 05:59:57,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 05:59:57,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 05:59:57,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095452385] [2024-12-02 05:59:57,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 05:59:57,362 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 05:59:57,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 05:59:57,363 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 05:59:57,363 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-12-02 05:59:57,376 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2024-12-02 05:59:57,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 92 transitions, 479 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 05:59:57,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 05:59:57,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2024-12-02 05:59:57,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 05:59:58,079 INFO L124 PetriNetUnfolderBase]: 4203/6774 cut-off events. [2024-12-02 05:59:58,079 INFO L125 PetriNetUnfolderBase]: For 13556/13594 co-relation queries the response was YES. [2024-12-02 05:59:58,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20868 conditions, 6774 events. 4203/6774 cut-off events. For 13556/13594 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 41857 event pairs, 1480 based on Foata normal form. 52/6464 useless extension candidates. Maximal degree in co-relation 12435. Up to 4189 conditions per place. [2024-12-02 05:59:58,118 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 87 selfloop transitions, 33 changer transitions 16/146 dead transitions. [2024-12-02 05:59:58,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 146 transitions, 1103 flow [2024-12-02 05:59:58,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 05:59:58,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-02 05:59:58,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 110 transitions. [2024-12-02 05:59:58,120 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5641025641025641 [2024-12-02 05:59:58,121 INFO L175 Difference]: Start difference. First operand has 64 places, 92 transitions, 479 flow. Second operand 5 states and 110 transitions. [2024-12-02 05:59:58,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 146 transitions, 1103 flow [2024-12-02 05:59:58,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 146 transitions, 1074 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-12-02 05:59:58,160 INFO L231 Difference]: Finished difference. Result has 68 places, 108 transitions, 692 flow [2024-12-02 05:59:58,160 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=466, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=692, PETRI_PLACES=68, PETRI_TRANSITIONS=108} [2024-12-02 05:59:58,161 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 30 predicate places. [2024-12-02 05:59:58,161 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 108 transitions, 692 flow [2024-12-02 05:59:58,161 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 05:59:58,161 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 05:59:58,161 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 05:59:58,167 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-12-02 05:59:58,361 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 05:59:58,361 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 05:59:58,362 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 05:59:58,362 INFO L85 PathProgramCache]: Analyzing trace with hash -288638567, now seen corresponding path program 5 times [2024-12-02 05:59:58,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 05:59:58,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [947848092] [2024-12-02 05:59:58,362 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 05:59:58,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 05:59:58,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 05:59:58,364 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 05:59:58,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-12-02 05:59:58,465 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 05:59:58,465 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 05:59:58,469 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 05:59:58,470 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 05:59:58,588 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 05:59:58,588 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 05:59:58,645 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 05:59:58,646 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 05:59:58,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947848092] [2024-12-02 05:59:58,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947848092] provided 1 perfect and 1 imperfect interpolant sequences [2024-12-02 05:59:58,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 05:59:58,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2024-12-02 05:59:58,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940482296] [2024-12-02 05:59:58,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 05:59:58,646 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 05:59:58,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 05:59:58,647 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 05:59:58,647 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-12-02 05:59:58,656 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-12-02 05:59:58,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 108 transitions, 692 flow. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 05:59:58,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 05:59:58,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-12-02 05:59:58,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 05:59:59,410 INFO L124 PetriNetUnfolderBase]: 4513/6790 cut-off events. [2024-12-02 05:59:59,411 INFO L125 PetriNetUnfolderBase]: For 17616/17704 co-relation queries the response was YES. [2024-12-02 05:59:59,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24955 conditions, 6790 events. 4513/6790 cut-off events. For 17616/17704 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 38493 event pairs, 862 based on Foata normal form. 62/6532 useless extension candidates. Maximal degree in co-relation 17428. Up to 2954 conditions per place. [2024-12-02 05:59:59,443 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 128 selfloop transitions, 28 changer transitions 0/162 dead transitions. [2024-12-02 05:59:59,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 162 transitions, 1285 flow [2024-12-02 05:59:59,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 05:59:59,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-02 05:59:59,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 117 transitions. [2024-12-02 05:59:59,445 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-12-02 05:59:59,445 INFO L175 Difference]: Start difference. First operand has 68 places, 108 transitions, 692 flow. Second operand 5 states and 117 transitions. [2024-12-02 05:59:59,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 162 transitions, 1285 flow [2024-12-02 05:59:59,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 162 transitions, 1247 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-12-02 05:59:59,520 INFO L231 Difference]: Finished difference. Result has 73 places, 120 transitions, 883 flow [2024-12-02 05:59:59,521 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=661, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=883, PETRI_PLACES=73, PETRI_TRANSITIONS=120} [2024-12-02 05:59:59,521 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 35 predicate places. [2024-12-02 05:59:59,521 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 120 transitions, 883 flow [2024-12-02 05:59:59,522 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 05:59:59,522 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 05:59:59,522 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 05:59:59,529 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-12-02 05:59:59,722 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 05:59:59,722 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 05:59:59,723 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 05:59:59,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1583686711, now seen corresponding path program 6 times [2024-12-02 05:59:59,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 05:59:59,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2016221574] [2024-12-02 05:59:59,723 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 05:59:59,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 05:59:59,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 05:59:59,725 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 05:59:59,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-12-02 05:59:59,819 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-12-02 05:59:59,820 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 05:59:59,823 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 05:59:59,825 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 05:59:59,953 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 05:59:59,953 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 05:59:59,953 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 05:59:59,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016221574] [2024-12-02 05:59:59,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016221574] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 05:59:59,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 05:59:59,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 05:59:59,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425287499] [2024-12-02 05:59:59,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 05:59:59,954 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 05:59:59,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 05:59:59,954 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 05:59:59,954 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-12-02 05:59:59,971 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2024-12-02 05:59:59,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 120 transitions, 883 flow. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 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 05:59:59,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 05:59:59,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2024-12-02 05:59:59,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 06:00:01,006 INFO L124 PetriNetUnfolderBase]: 5355/8916 cut-off events. [2024-12-02 06:00:01,007 INFO L125 PetriNetUnfolderBase]: For 28668/28818 co-relation queries the response was YES. [2024-12-02 06:00:01,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31240 conditions, 8916 events. 5355/8916 cut-off events. For 28668/28818 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 61672 event pairs, 1472 based on Foata normal form. 124/8428 useless extension candidates. Maximal degree in co-relation 20816. Up to 4092 conditions per place. [2024-12-02 06:00:01,068 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 135 selfloop transitions, 28 changer transitions 15/193 dead transitions. [2024-12-02 06:00:01,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 193 transitions, 1907 flow [2024-12-02 06:00:01,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 06:00:01,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-12-02 06:00:01,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 120 transitions. [2024-12-02 06:00:01,070 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5128205128205128 [2024-12-02 06:00:01,070 INFO L175 Difference]: Start difference. First operand has 73 places, 120 transitions, 883 flow. Second operand 6 states and 120 transitions. [2024-12-02 06:00:01,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 193 transitions, 1907 flow [2024-12-02 06:00:01,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 193 transitions, 1887 flow, removed 10 selfloop flow, removed 0 redundant places. [2024-12-02 06:00:01,153 INFO L231 Difference]: Finished difference. Result has 81 places, 144 transitions, 1306 flow [2024-12-02 06:00:01,153 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=871, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1306, PETRI_PLACES=81, PETRI_TRANSITIONS=144} [2024-12-02 06:00:01,154 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 43 predicate places. [2024-12-02 06:00:01,154 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 144 transitions, 1306 flow [2024-12-02 06:00:01,154 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 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 06:00:01,154 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 06:00:01,154 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:00:01,165 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-12-02 06:00:01,355 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:00:01,355 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 06:00:01,355 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:00:01,355 INFO L85 PathProgramCache]: Analyzing trace with hash -673986951, now seen corresponding path program 7 times [2024-12-02 06:00:01,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 06:00:01,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [406951027] [2024-12-02 06:00:01,356 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 06:00:01,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:00:01,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:00:01,357 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:00:01,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-12-02 06:00:01,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:00:01,445 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 06:00:01,446 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:00:01,542 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 06:00:01,542 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 06:00:01,596 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 06:00:01,596 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 06:00:01,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406951027] [2024-12-02 06:00:01,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406951027] provided 1 perfect and 1 imperfect interpolant sequences [2024-12-02 06:00:01,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 06:00:01,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2024-12-02 06:00:01,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939308475] [2024-12-02 06:00:01,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:00:01,596 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 06:00:01,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 06:00:01,597 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 06:00:01,597 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-12-02 06:00:01,605 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-12-02 06:00:01,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 144 transitions, 1306 flow. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 06:00:01,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 06:00:01,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-12-02 06:00:01,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 06:00:02,574 INFO L124 PetriNetUnfolderBase]: 5617/8776 cut-off events. [2024-12-02 06:00:02,574 INFO L125 PetriNetUnfolderBase]: For 38694/38744 co-relation queries the response was YES. [2024-12-02 06:00:02,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36209 conditions, 8776 events. 5617/8776 cut-off events. For 38694/38744 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 53872 event pairs, 880 based on Foata normal form. 78/8410 useless extension candidates. Maximal degree in co-relation 31645. Up to 2327 conditions per place. [2024-12-02 06:00:02,616 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 137 selfloop transitions, 61 changer transitions 3/207 dead transitions. [2024-12-02 06:00:02,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 207 transitions, 2070 flow [2024-12-02 06:00:02,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 06:00:02,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-12-02 06:00:02,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 130 transitions. [2024-12-02 06:00:02,619 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-12-02 06:00:02,619 INFO L175 Difference]: Start difference. First operand has 81 places, 144 transitions, 1306 flow. Second operand 6 states and 130 transitions. [2024-12-02 06:00:02,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 207 transitions, 2070 flow [2024-12-02 06:00:02,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 207 transitions, 2057 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-12-02 06:00:02,721 INFO L231 Difference]: Finished difference. Result has 90 places, 153 transitions, 1631 flow [2024-12-02 06:00:02,721 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1301, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1631, PETRI_PLACES=90, PETRI_TRANSITIONS=153} [2024-12-02 06:00:02,722 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 52 predicate places. [2024-12-02 06:00:02,722 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 153 transitions, 1631 flow [2024-12-02 06:00:02,722 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 06:00:02,722 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 06:00:02,722 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:00:02,733 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-12-02 06:00:02,922 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:00:02,923 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 06:00:02,923 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:00:02,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1381151881, now seen corresponding path program 8 times [2024-12-02 06:00:02,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 06:00:02,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1110932606] [2024-12-02 06:00:02,923 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 06:00:02,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:00:02,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:00:02,925 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:00:02,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-12-02 06:00:03,023 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 06:00:03,023 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 06:00:03,026 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 06:00:03,027 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:00:03,118 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 06:00:03,118 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 06:00:03,118 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 06:00:03,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110932606] [2024-12-02 06:00:03,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110932606] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 06:00:03,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 06:00:03,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 06:00:03,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552261556] [2024-12-02 06:00:03,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:00:03,119 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 06:00:03,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 06:00:03,119 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 06:00:03,119 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-12-02 06:00:03,131 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2024-12-02 06:00:03,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 153 transitions, 1631 flow. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 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 06:00:03,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 06:00:03,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2024-12-02 06:00:03,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 06:00:04,103 INFO L124 PetriNetUnfolderBase]: 4951/8002 cut-off events. [2024-12-02 06:00:04,103 INFO L125 PetriNetUnfolderBase]: For 53088/53170 co-relation queries the response was YES. [2024-12-02 06:00:04,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36729 conditions, 8002 events. 4951/8002 cut-off events. For 53088/53170 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 50802 event pairs, 1394 based on Foata normal form. 68/7590 useless extension candidates. Maximal degree in co-relation 33241. Up to 3948 conditions per place. [2024-12-02 06:00:04,152 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 149 selfloop transitions, 38 changer transitions 0/206 dead transitions. [2024-12-02 06:00:04,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 206 transitions, 2434 flow [2024-12-02 06:00:04,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 06:00:04,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-12-02 06:00:04,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 123 transitions. [2024-12-02 06:00:04,154 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5256410256410257 [2024-12-02 06:00:04,154 INFO L175 Difference]: Start difference. First operand has 90 places, 153 transitions, 1631 flow. Second operand 6 states and 123 transitions. [2024-12-02 06:00:04,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 206 transitions, 2434 flow [2024-12-02 06:00:04,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 206 transitions, 2402 flow, removed 16 selfloop flow, removed 1 redundant places. [2024-12-02 06:00:04,304 INFO L231 Difference]: Finished difference. Result has 95 places, 168 transitions, 1987 flow [2024-12-02 06:00:04,304 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1605, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1987, PETRI_PLACES=95, PETRI_TRANSITIONS=168} [2024-12-02 06:00:04,304 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 57 predicate places. [2024-12-02 06:00:04,305 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 168 transitions, 1987 flow [2024-12-02 06:00:04,305 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 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 06:00:04,305 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 06:00:04,305 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:00:04,311 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-12-02 06:00:04,505 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:00:04,505 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 06:00:04,506 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:00:04,506 INFO L85 PathProgramCache]: Analyzing trace with hash -940073336, now seen corresponding path program 1 times [2024-12-02 06:00:04,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 06:00:04,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [235308786] [2024-12-02 06:00:04,506 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:00:04,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:00:04,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:00:04,508 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:00:04,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-12-02 06:00:04,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:00:04,597 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 06:00:04,598 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:00:04,700 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-12-02 06:00:04,701 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 06:00:04,746 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-12-02 06:00:04,746 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 06:00:04,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235308786] [2024-12-02 06:00:04,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235308786] provided 1 perfect and 1 imperfect interpolant sequences [2024-12-02 06:00:04,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 06:00:04,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2024-12-02 06:00:04,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761458880] [2024-12-02 06:00:04,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:00:04,746 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 06:00:04,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 06:00:04,747 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 06:00:04,747 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-12-02 06:00:04,755 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-12-02 06:00:04,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 168 transitions, 1987 flow. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 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 06:00:04,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 06:00:04,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-12-02 06:00:04,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 06:00:06,025 INFO L124 PetriNetUnfolderBase]: 7669/12840 cut-off events. [2024-12-02 06:00:06,026 INFO L125 PetriNetUnfolderBase]: For 88126/88126 co-relation queries the response was YES. [2024-12-02 06:00:06,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56572 conditions, 12840 events. 7669/12840 cut-off events. For 88126/88126 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 89582 event pairs, 364 based on Foata normal form. 468/12678 useless extension candidates. Maximal degree in co-relation 51394. Up to 3644 conditions per place. [2024-12-02 06:00:06,100 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 276 selfloop transitions, 49 changer transitions 0/330 dead transitions. [2024-12-02 06:00:06,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 330 transitions, 4666 flow [2024-12-02 06:00:06,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-12-02 06:00:06,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-12-02 06:00:06,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 145 transitions. [2024-12-02 06:00:06,102 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5311355311355311 [2024-12-02 06:00:06,102 INFO L175 Difference]: Start difference. First operand has 95 places, 168 transitions, 1987 flow. Second operand 7 states and 145 transitions. [2024-12-02 06:00:06,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 330 transitions, 4666 flow [2024-12-02 06:00:06,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 330 transitions, 4536 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-12-02 06:00:06,380 INFO L231 Difference]: Finished difference. Result has 103 places, 197 transitions, 2409 flow [2024-12-02 06:00:06,380 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1918, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2409, PETRI_PLACES=103, PETRI_TRANSITIONS=197} [2024-12-02 06:00:06,381 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 65 predicate places. [2024-12-02 06:00:06,381 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 197 transitions, 2409 flow [2024-12-02 06:00:06,381 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 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 06:00:06,381 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 06:00:06,381 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:00:06,388 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-12-02 06:00:06,581 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:00:06,582 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 06:00:06,582 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:00:06,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1826631798, now seen corresponding path program 2 times [2024-12-02 06:00:06,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 06:00:06,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1545305305] [2024-12-02 06:00:06,582 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 06:00:06,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:00:06,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:00:06,584 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:00:06,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-12-02 06:00:06,689 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 06:00:06,689 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 06:00:06,693 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 06:00:06,694 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:00:06,790 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-12-02 06:00:06,790 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 06:00:06,790 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 06:00:06,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545305305] [2024-12-02 06:00:06,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545305305] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 06:00:06,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 06:00:06,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 06:00:06,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332500067] [2024-12-02 06:00:06,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:00:06,791 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 06:00:06,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 06:00:06,791 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 06:00:06,791 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-12-02 06:00:06,803 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-12-02 06:00:06,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 197 transitions, 2409 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 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 06:00:06,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 06:00:06,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-12-02 06:00:06,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 06:00:08,273 INFO L124 PetriNetUnfolderBase]: 6467/10740 cut-off events. [2024-12-02 06:00:08,273 INFO L125 PetriNetUnfolderBase]: For 92626/92850 co-relation queries the response was YES. [2024-12-02 06:00:08,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55427 conditions, 10740 events. 6467/10740 cut-off events. For 92626/92850 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 74699 event pairs, 1482 based on Foata normal form. 108/10190 useless extension candidates. Maximal degree in co-relation 44167. Up to 4816 conditions per place. [2024-12-02 06:00:08,444 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 270 selfloop transitions, 15 changer transitions 29/323 dead transitions. [2024-12-02 06:00:08,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 323 transitions, 4820 flow [2024-12-02 06:00:08,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 06:00:08,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-12-02 06:00:08,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 117 transitions. [2024-12-02 06:00:08,446 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-12-02 06:00:08,446 INFO L175 Difference]: Start difference. First operand has 103 places, 197 transitions, 2409 flow. Second operand 6 states and 117 transitions. [2024-12-02 06:00:08,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 323 transitions, 4820 flow [2024-12-02 06:00:08,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 323 transitions, 4820 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-12-02 06:00:08,713 INFO L231 Difference]: Finished difference. Result has 111 places, 198 transitions, 2500 flow [2024-12-02 06:00:08,713 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2409, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2500, PETRI_PLACES=111, PETRI_TRANSITIONS=198} [2024-12-02 06:00:08,713 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 73 predicate places. [2024-12-02 06:00:08,713 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 198 transitions, 2500 flow [2024-12-02 06:00:08,714 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 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 06:00:08,714 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 06:00:08,714 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:00:08,721 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-12-02 06:00:08,914 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:00:08,914 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 06:00:08,915 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:00:08,915 INFO L85 PathProgramCache]: Analyzing trace with hash 193523562, now seen corresponding path program 3 times [2024-12-02 06:00:08,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 06:00:08,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1974619070] [2024-12-02 06:00:08,915 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 06:00:08,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:00:08,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:00:08,917 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:00:08,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-12-02 06:00:09,012 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-12-02 06:00:09,012 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 06:00:09,016 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 06:00:09,017 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:00:09,137 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-12-02 06:00:09,137 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 06:00:09,198 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-12-02 06:00:09,198 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 06:00:09,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974619070] [2024-12-02 06:00:09,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974619070] provided 1 perfect and 1 imperfect interpolant sequences [2024-12-02 06:00:09,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 06:00:09,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2024-12-02 06:00:09,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372877090] [2024-12-02 06:00:09,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:00:09,199 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 06:00:09,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 06:00:09,199 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 06:00:09,199 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-12-02 06:00:09,212 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-12-02 06:00:09,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 198 transitions, 2500 flow. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 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 06:00:09,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 06:00:09,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-12-02 06:00:09,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 06:00:10,815 INFO L124 PetriNetUnfolderBase]: 8551/14362 cut-off events. [2024-12-02 06:00:10,815 INFO L125 PetriNetUnfolderBase]: For 138944/139024 co-relation queries the response was YES. [2024-12-02 06:00:10,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73880 conditions, 14362 events. 8551/14362 cut-off events. For 138944/139024 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 101570 event pairs, 1184 based on Foata normal form. 188/13916 useless extension candidates. Maximal degree in co-relation 59448. Up to 3390 conditions per place. [2024-12-02 06:00:10,916 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 274 selfloop transitions, 68 changer transitions 0/347 dead transitions. [2024-12-02 06:00:10,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 347 transitions, 5202 flow [2024-12-02 06:00:10,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 06:00:10,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-12-02 06:00:10,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 131 transitions. [2024-12-02 06:00:10,918 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5598290598290598 [2024-12-02 06:00:10,918 INFO L175 Difference]: Start difference. First operand has 111 places, 198 transitions, 2500 flow. Second operand 6 states and 131 transitions. [2024-12-02 06:00:10,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 347 transitions, 5202 flow [2024-12-02 06:00:11,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 347 transitions, 5132 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-12-02 06:00:11,391 INFO L231 Difference]: Finished difference. Result has 117 places, 233 transitions, 3255 flow [2024-12-02 06:00:11,391 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2461, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3255, PETRI_PLACES=117, PETRI_TRANSITIONS=233} [2024-12-02 06:00:11,391 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 79 predicate places. [2024-12-02 06:00:11,391 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 233 transitions, 3255 flow [2024-12-02 06:00:11,391 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 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 06:00:11,391 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 06:00:11,392 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:00:11,399 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-12-02 06:00:11,592 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:00:11,592 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 06:00:11,593 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:00:11,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1434674718, now seen corresponding path program 4 times [2024-12-02 06:00:11,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 06:00:11,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1003173064] [2024-12-02 06:00:11,593 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 06:00:11,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:00:11,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:00:11,595 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:00:11,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-12-02 06:00:11,671 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 06:00:11,671 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 06:00:11,673 INFO L256 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-12-02 06:00:11,674 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:00:11,721 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-12-02 06:00:11,721 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 06:00:11,763 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-12-02 06:00:11,763 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 06:00:11,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003173064] [2024-12-02 06:00:11,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003173064] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 06:00:11,764 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-12-02 06:00:11,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2024-12-02 06:00:11,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55765731] [2024-12-02 06:00:11,764 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-12-02 06:00:11,764 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-12-02 06:00:11,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 06:00:11,765 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-12-02 06:00:11,765 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-12-02 06:00:11,786 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-12-02 06:00:11,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 233 transitions, 3255 flow. Second operand has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 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) [2024-12-02 06:00:11,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 06:00:11,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-12-02 06:00:11,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 06:00:14,181 INFO L124 PetriNetUnfolderBase]: 8917/15132 cut-off events. [2024-12-02 06:00:14,181 INFO L125 PetriNetUnfolderBase]: For 164480/164686 co-relation queries the response was YES. [2024-12-02 06:00:14,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82324 conditions, 15132 events. 8917/15132 cut-off events. For 164480/164686 co-relation queries the response was YES. Maximal size of possible extension queue 691. Compared 112466 event pairs, 606 based on Foata normal form. 224/14674 useless extension candidates. Maximal degree in co-relation 63963. Up to 3009 conditions per place. [2024-12-02 06:00:14,329 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 203 selfloop transitions, 221 changer transitions 0/460 dead transitions. [2024-12-02 06:00:14,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 460 transitions, 6852 flow [2024-12-02 06:00:14,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-12-02 06:00:14,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-12-02 06:00:14,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 231 transitions. [2024-12-02 06:00:14,331 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5384615384615384 [2024-12-02 06:00:14,331 INFO L175 Difference]: Start difference. First operand has 117 places, 233 transitions, 3255 flow. Second operand 11 states and 231 transitions. [2024-12-02 06:00:14,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 460 transitions, 6852 flow [2024-12-02 06:00:14,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 460 transitions, 6816 flow, removed 18 selfloop flow, removed 0 redundant places. [2024-12-02 06:00:14,944 INFO L231 Difference]: Finished difference. Result has 129 places, 370 transitions, 5727 flow [2024-12-02 06:00:14,944 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3249, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5727, PETRI_PLACES=129, PETRI_TRANSITIONS=370} [2024-12-02 06:00:14,945 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 91 predicate places. [2024-12-02 06:00:14,945 INFO L471 AbstractCegarLoop]: Abstraction has has 129 places, 370 transitions, 5727 flow [2024-12-02 06:00:14,945 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 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) [2024-12-02 06:00:14,945 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 06:00:14,945 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:00:14,951 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-12-02 06:00:15,145 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:00:15,145 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 06:00:15,146 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:00:15,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1711112976, now seen corresponding path program 5 times [2024-12-02 06:00:15,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 06:00:15,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1764035709] [2024-12-02 06:00:15,146 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 06:00:15,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:00:15,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:00:15,148 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:00:15,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-12-02 06:00:15,279 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 06:00:15,280 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 06:00:15,284 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 06:00:15,285 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:00:15,407 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-12-02 06:00:15,407 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 06:00:15,450 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-12-02 06:00:15,451 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 06:00:15,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764035709] [2024-12-02 06:00:15,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764035709] provided 1 perfect and 1 imperfect interpolant sequences [2024-12-02 06:00:15,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 06:00:15,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2024-12-02 06:00:15,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53645279] [2024-12-02 06:00:15,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:00:15,451 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 06:00:15,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 06:00:15,451 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 06:00:15,451 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-12-02 06:00:15,463 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-12-02 06:00:15,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 370 transitions, 5727 flow. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 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 06:00:15,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 06:00:15,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-12-02 06:00:15,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 06:00:17,433 INFO L124 PetriNetUnfolderBase]: 9581/15800 cut-off events. [2024-12-02 06:00:17,433 INFO L125 PetriNetUnfolderBase]: For 206020/206300 co-relation queries the response was YES. [2024-12-02 06:00:17,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92843 conditions, 15800 events. 9581/15800 cut-off events. For 206020/206300 co-relation queries the response was YES. Maximal size of possible extension queue 629. Compared 111658 event pairs, 1212 based on Foata normal form. 160/15204 useless extension candidates. Maximal degree in co-relation 77507. Up to 7126 conditions per place. [2024-12-02 06:00:17,568 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 350 selfloop transitions, 128 changer transitions 0/483 dead transitions. [2024-12-02 06:00:17,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 483 transitions, 8239 flow [2024-12-02 06:00:17,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 06:00:17,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-02 06:00:17,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 109 transitions. [2024-12-02 06:00:17,570 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.558974358974359 [2024-12-02 06:00:17,570 INFO L175 Difference]: Start difference. First operand has 129 places, 370 transitions, 5727 flow. Second operand 5 states and 109 transitions. [2024-12-02 06:00:17,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 483 transitions, 8239 flow [2024-12-02 06:00:18,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 483 transitions, 8037 flow, removed 45 selfloop flow, removed 1 redundant places. [2024-12-02 06:00:18,380 INFO L231 Difference]: Finished difference. Result has 136 places, 402 transitions, 6612 flow [2024-12-02 06:00:18,381 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=5537, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=6612, PETRI_PLACES=136, PETRI_TRANSITIONS=402} [2024-12-02 06:00:18,381 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 98 predicate places. [2024-12-02 06:00:18,381 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 402 transitions, 6612 flow [2024-12-02 06:00:18,381 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 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 06:00:18,381 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 06:00:18,381 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:00:18,388 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-12-02 06:00:18,582 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:00:18,582 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 06:00:18,582 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:00:18,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1574497558, now seen corresponding path program 6 times [2024-12-02 06:00:18,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 06:00:18,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [388196520] [2024-12-02 06:00:18,583 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 06:00:18,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:00:18,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:00:18,584 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:00:18,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-12-02 06:00:18,686 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-12-02 06:00:18,686 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 06:00:18,690 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 06:00:18,691 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:00:18,794 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-12-02 06:00:18,794 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 06:00:18,856 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-12-02 06:00:18,856 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 06:00:18,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388196520] [2024-12-02 06:00:18,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388196520] provided 1 perfect and 1 imperfect interpolant sequences [2024-12-02 06:00:18,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 06:00:18,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2024-12-02 06:00:18,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125394462] [2024-12-02 06:00:18,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:00:18,857 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 06:00:18,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 06:00:18,857 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 06:00:18,857 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-12-02 06:00:18,870 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-12-02 06:00:18,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 402 transitions, 6612 flow. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 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 06:00:18,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 06:00:18,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-12-02 06:00:18,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 06:00:20,907 INFO L124 PetriNetUnfolderBase]: 9747/16144 cut-off events. [2024-12-02 06:00:20,907 INFO L125 PetriNetUnfolderBase]: For 214558/214848 co-relation queries the response was YES. [2024-12-02 06:00:20,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96812 conditions, 16144 events. 9747/16144 cut-off events. For 214558/214848 co-relation queries the response was YES. Maximal size of possible extension queue 721. Compared 117143 event pairs, 916 based on Foata normal form. 174/15650 useless extension candidates. Maximal degree in co-relation 79413. Up to 3912 conditions per place. [2024-12-02 06:00:21,059 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 236 selfloop transitions, 221 changer transitions 0/502 dead transitions. [2024-12-02 06:00:21,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 502 transitions, 8880 flow [2024-12-02 06:00:21,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 06:00:21,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-12-02 06:00:21,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 124 transitions. [2024-12-02 06:00:21,061 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5299145299145299 [2024-12-02 06:00:21,061 INFO L175 Difference]: Start difference. First operand has 136 places, 402 transitions, 6612 flow. Second operand 6 states and 124 transitions. [2024-12-02 06:00:21,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 502 transitions, 8880 flow [2024-12-02 06:00:22,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 502 transitions, 8705 flow, removed 20 selfloop flow, removed 1 redundant places. [2024-12-02 06:00:22,030 INFO L231 Difference]: Finished difference. Result has 145 places, 450 transitions, 8077 flow [2024-12-02 06:00:22,030 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=6477, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8077, PETRI_PLACES=145, PETRI_TRANSITIONS=450} [2024-12-02 06:00:22,031 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 107 predicate places. [2024-12-02 06:00:22,031 INFO L471 AbstractCegarLoop]: Abstraction has has 145 places, 450 transitions, 8077 flow [2024-12-02 06:00:22,031 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 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 06:00:22,031 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 06:00:22,031 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:00:22,039 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-12-02 06:00:22,231 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:00:22,231 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 06:00:22,232 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:00:22,232 INFO L85 PathProgramCache]: Analyzing trace with hash -143371924, now seen corresponding path program 7 times [2024-12-02 06:00:22,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 06:00:22,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1777714787] [2024-12-02 06:00:22,232 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 06:00:22,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:00:22,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:00:22,234 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:00:22,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-12-02 06:00:22,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:00:22,334 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 06:00:22,335 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:00:22,430 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-12-02 06:00:22,430 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 06:00:22,430 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 06:00:22,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777714787] [2024-12-02 06:00:22,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777714787] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 06:00:22,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 06:00:22,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 06:00:22,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353176539] [2024-12-02 06:00:22,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:00:22,431 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 06:00:22,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 06:00:22,432 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 06:00:22,432 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-12-02 06:00:22,449 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-12-02 06:00:22,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 450 transitions, 8077 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 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 06:00:22,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 06:00:22,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-12-02 06:00:22,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 06:00:24,820 INFO L124 PetriNetUnfolderBase]: 9889/16248 cut-off events. [2024-12-02 06:00:24,820 INFO L125 PetriNetUnfolderBase]: For 270920/271212 co-relation queries the response was YES. [2024-12-02 06:00:24,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108021 conditions, 16248 events. 9889/16248 cut-off events. For 270920/271212 co-relation queries the response was YES. Maximal size of possible extension queue 809. Compared 118673 event pairs, 2074 based on Foata normal form. 48/15432 useless extension candidates. Maximal degree in co-relation 90869. Up to 6790 conditions per place. [2024-12-02 06:00:24,969 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 363 selfloop transitions, 70 changer transitions 11/554 dead transitions. [2024-12-02 06:00:24,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 554 transitions, 10746 flow [2024-12-02 06:00:24,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 06:00:24,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-12-02 06:00:24,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 117 transitions. [2024-12-02 06:00:24,971 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-12-02 06:00:24,971 INFO L175 Difference]: Start difference. First operand has 145 places, 450 transitions, 8077 flow. Second operand 6 states and 117 transitions. [2024-12-02 06:00:24,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 554 transitions, 10746 flow [2024-12-02 06:00:26,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 554 transitions, 10736 flow, removed 5 selfloop flow, removed 0 redundant places. [2024-12-02 06:00:26,317 INFO L231 Difference]: Finished difference. Result has 152 places, 472 transitions, 8794 flow [2024-12-02 06:00:26,317 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=8071, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8794, PETRI_PLACES=152, PETRI_TRANSITIONS=472} [2024-12-02 06:00:26,317 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 114 predicate places. [2024-12-02 06:00:26,318 INFO L471 AbstractCegarLoop]: Abstraction has has 152 places, 472 transitions, 8794 flow [2024-12-02 06:00:26,318 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 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 06:00:26,318 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 06:00:26,318 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:00:26,324 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-12-02 06:00:26,518 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:00:26,518 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 06:00:26,519 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:00:26,519 INFO L85 PathProgramCache]: Analyzing trace with hash 817276100, now seen corresponding path program 8 times [2024-12-02 06:00:26,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 06:00:26,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [473576806] [2024-12-02 06:00:26,519 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 06:00:26,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:00:26,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:00:26,521 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:00:26,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-12-02 06:00:26,629 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 06:00:26,629 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 06:00:26,633 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 06:00:26,634 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:00:26,715 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-12-02 06:00:26,715 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 06:00:26,716 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 06:00:26,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473576806] [2024-12-02 06:00:26,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473576806] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 06:00:26,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 06:00:26,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 06:00:26,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108568459] [2024-12-02 06:00:26,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:00:26,716 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 06:00:26,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 06:00:26,717 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 06:00:26,717 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-12-02 06:00:26,733 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-12-02 06:00:26,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 472 transitions, 8794 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 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 06:00:26,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 06:00:26,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-12-02 06:00:26,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 06:00:29,150 INFO L124 PetriNetUnfolderBase]: 9557/15584 cut-off events. [2024-12-02 06:00:29,150 INFO L125 PetriNetUnfolderBase]: For 286784/287160 co-relation queries the response was YES. [2024-12-02 06:00:29,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106257 conditions, 15584 events. 9557/15584 cut-off events. For 286784/287160 co-relation queries the response was YES. Maximal size of possible extension queue 773. Compared 112125 event pairs, 1674 based on Foata normal form. 86/14754 useless extension candidates. Maximal degree in co-relation 102626. Up to 5392 conditions per place. [2024-12-02 06:00:29,322 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 377 selfloop transitions, 83 changer transitions 15/585 dead transitions. [2024-12-02 06:00:29,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 585 transitions, 11590 flow [2024-12-02 06:00:29,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 06:00:29,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-12-02 06:00:29,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 117 transitions. [2024-12-02 06:00:29,324 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-12-02 06:00:29,324 INFO L175 Difference]: Start difference. First operand has 152 places, 472 transitions, 8794 flow. Second operand 6 states and 117 transitions. [2024-12-02 06:00:29,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 585 transitions, 11590 flow [2024-12-02 06:00:30,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 585 transitions, 11514 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-12-02 06:00:30,811 INFO L231 Difference]: Finished difference. Result has 156 places, 488 transitions, 9393 flow [2024-12-02 06:00:30,811 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=8737, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=9393, PETRI_PLACES=156, PETRI_TRANSITIONS=488} [2024-12-02 06:00:30,812 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 118 predicate places. [2024-12-02 06:00:30,812 INFO L471 AbstractCegarLoop]: Abstraction has has 156 places, 488 transitions, 9393 flow [2024-12-02 06:00:30,812 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 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 06:00:30,812 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 06:00:30,812 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:00:30,819 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-12-02 06:00:31,012 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:00:31,012 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 06:00:31,013 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:00:31,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1417807688, now seen corresponding path program 1 times [2024-12-02 06:00:31,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 06:00:31,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1061024193] [2024-12-02 06:00:31,013 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:00:31,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:00:31,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:00:31,015 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:00:31,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-12-02 06:00:31,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:00:31,110 INFO L256 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-12-02 06:00:31,111 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:00:31,143 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 06:00:31,143 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 06:00:31,143 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 06:00:31,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061024193] [2024-12-02 06:00:31,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061024193] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 06:00:31,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 06:00:31,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 06:00:31,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4551199] [2024-12-02 06:00:31,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:00:31,144 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 06:00:31,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 06:00:31,144 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 06:00:31,144 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-12-02 06:00:31,152 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 39 [2024-12-02 06:00:31,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 488 transitions, 9393 flow. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 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 06:00:31,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 06:00:31,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 39 [2024-12-02 06:00:31,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 06:00:34,571 INFO L124 PetriNetUnfolderBase]: 12995/18922 cut-off events. [2024-12-02 06:00:34,571 INFO L125 PetriNetUnfolderBase]: For 348924/349008 co-relation queries the response was YES. [2024-12-02 06:00:34,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123459 conditions, 18922 events. 12995/18922 cut-off events. For 348924/349008 co-relation queries the response was YES. Maximal size of possible extension queue 735. Compared 112012 event pairs, 1356 based on Foata normal form. 20/18530 useless extension candidates. Maximal degree in co-relation 114844. Up to 10012 conditions per place. [2024-12-02 06:00:34,769 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 415 selfloop transitions, 24 changer transitions 35/612 dead transitions. [2024-12-02 06:00:34,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 612 transitions, 12134 flow [2024-12-02 06:00:34,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 06:00:34,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-12-02 06:00:34,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-12-02 06:00:34,771 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4829059829059829 [2024-12-02 06:00:34,771 INFO L175 Difference]: Start difference. First operand has 156 places, 488 transitions, 9393 flow. Second operand 6 states and 113 transitions. [2024-12-02 06:00:34,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 612 transitions, 12134 flow [2024-12-02 06:00:36,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 612 transitions, 11024 flow, removed 26 selfloop flow, removed 17 redundant places. [2024-12-02 06:00:36,934 INFO L231 Difference]: Finished difference. Result has 147 places, 419 transitions, 6791 flow [2024-12-02 06:00:36,934 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=7098, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6791, PETRI_PLACES=147, PETRI_TRANSITIONS=419} [2024-12-02 06:00:36,934 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 109 predicate places. [2024-12-02 06:00:36,934 INFO L471 AbstractCegarLoop]: Abstraction has has 147 places, 419 transitions, 6791 flow [2024-12-02 06:00:36,934 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 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 06:00:36,934 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 06:00:36,935 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:00:36,942 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-12-02 06:00:37,135 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:00:37,135 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 06:00:37,136 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:00:37,136 INFO L85 PathProgramCache]: Analyzing trace with hash -2106980899, now seen corresponding path program 1 times [2024-12-02 06:00:37,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 06:00:37,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [664053679] [2024-12-02 06:00:37,136 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:00:37,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:00:37,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:00:37,138 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:00:37,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-12-02 06:00:37,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:00:37,252 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 06:00:37,253 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:00:37,327 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 06:00:37,327 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 06:00:37,327 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 06:00:37,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664053679] [2024-12-02 06:00:37,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664053679] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 06:00:37,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 06:00:37,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 06:00:37,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833276066] [2024-12-02 06:00:37,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:00:37,328 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 06:00:37,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 06:00:37,328 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 06:00:37,328 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-12-02 06:00:37,338 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-12-02 06:00:37,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 419 transitions, 6791 flow. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 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 06:00:37,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 06:00:37,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-12-02 06:00:37,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 06:00:39,179 INFO L124 PetriNetUnfolderBase]: 7855/13076 cut-off events. [2024-12-02 06:00:39,179 INFO L125 PetriNetUnfolderBase]: For 170581/171037 co-relation queries the response was YES. [2024-12-02 06:00:39,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82133 conditions, 13076 events. 7855/13076 cut-off events. For 170581/171037 co-relation queries the response was YES. Maximal size of possible extension queue 637. Compared 92697 event pairs, 1784 based on Foata normal form. 64/12861 useless extension candidates. Maximal degree in co-relation 66461. Up to 6590 conditions per place. [2024-12-02 06:00:39,320 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 266 selfloop transitions, 97 changer transitions 16/485 dead transitions. [2024-12-02 06:00:39,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 485 transitions, 8308 flow [2024-12-02 06:00:39,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 06:00:39,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-12-02 06:00:39,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 124 transitions. [2024-12-02 06:00:39,322 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5299145299145299 [2024-12-02 06:00:39,322 INFO L175 Difference]: Start difference. First operand has 147 places, 419 transitions, 6791 flow. Second operand 6 states and 124 transitions. [2024-12-02 06:00:39,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 485 transitions, 8308 flow [2024-12-02 06:00:39,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 485 transitions, 8304 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-12-02 06:00:39,926 INFO L231 Difference]: Finished difference. Result has 153 places, 416 transitions, 6960 flow [2024-12-02 06:00:39,927 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=6787, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6960, PETRI_PLACES=153, PETRI_TRANSITIONS=416} [2024-12-02 06:00:39,927 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 115 predicate places. [2024-12-02 06:00:39,927 INFO L471 AbstractCegarLoop]: Abstraction has has 153 places, 416 transitions, 6960 flow [2024-12-02 06:00:39,927 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 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 06:00:39,927 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 06:00:39,927 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:00:39,935 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-12-02 06:00:40,128 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:00:40,128 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 06:00:40,128 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:00:40,128 INFO L85 PathProgramCache]: Analyzing trace with hash -207339157, now seen corresponding path program 2 times [2024-12-02 06:00:40,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 06:00:40,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1186709663] [2024-12-02 06:00:40,129 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 06:00:40,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:00:40,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:00:40,130 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:00:40,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-12-02 06:00:40,218 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-12-02 06:00:40,218 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 06:00:40,221 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 06:00:40,222 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:00:40,328 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 06:00:40,328 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 06:00:40,328 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 06:00:40,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186709663] [2024-12-02 06:00:40,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186709663] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 06:00:40,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 06:00:40,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 06:00:40,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239357845] [2024-12-02 06:00:40,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:00:40,328 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 06:00:40,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 06:00:40,329 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 06:00:40,329 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-12-02 06:00:40,340 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-12-02 06:00:40,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 416 transitions, 6960 flow. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 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 06:00:40,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 06:00:40,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-12-02 06:00:40,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 06:00:42,509 INFO L124 PetriNetUnfolderBase]: 8785/14414 cut-off events. [2024-12-02 06:00:42,509 INFO L125 PetriNetUnfolderBase]: For 230389/230997 co-relation queries the response was YES. [2024-12-02 06:00:42,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92507 conditions, 14414 events. 8785/14414 cut-off events. For 230389/230997 co-relation queries the response was YES. Maximal size of possible extension queue 697. Compared 102303 event pairs, 662 based on Foata normal form. 448/14575 useless extension candidates. Maximal degree in co-relation 89490. Up to 6020 conditions per place. [2024-12-02 06:00:42,672 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 294 selfloop transitions, 131 changer transitions 3/534 dead transitions. [2024-12-02 06:00:42,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 534 transitions, 9420 flow [2024-12-02 06:00:42,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-12-02 06:00:42,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-12-02 06:00:42,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-12-02 06:00:42,674 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5032051282051282 [2024-12-02 06:00:42,675 INFO L175 Difference]: Start difference. First operand has 153 places, 416 transitions, 6960 flow. Second operand 8 states and 157 transitions. [2024-12-02 06:00:42,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 534 transitions, 9420 flow [2024-12-02 06:00:43,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 534 transitions, 9174 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-12-02 06:00:43,532 INFO L231 Difference]: Finished difference. Result has 158 places, 452 transitions, 7883 flow [2024-12-02 06:00:43,532 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=6789, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7883, PETRI_PLACES=158, PETRI_TRANSITIONS=452} [2024-12-02 06:00:43,532 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 120 predicate places. [2024-12-02 06:00:43,532 INFO L471 AbstractCegarLoop]: Abstraction has has 158 places, 452 transitions, 7883 flow [2024-12-02 06:00:43,533 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 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 06:00:43,533 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 06:00:43,533 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:00:43,540 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-12-02 06:00:43,733 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:00:43,733 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 06:00:43,733 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:00:43,734 INFO L85 PathProgramCache]: Analyzing trace with hash 883348855, now seen corresponding path program 3 times [2024-12-02 06:00:43,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 06:00:43,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [139350670] [2024-12-02 06:00:43,734 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 06:00:43,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:00:43,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:00:43,735 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:00:43,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-12-02 06:00:43,836 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-12-02 06:00:43,836 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 06:00:43,839 INFO L256 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 06:00:43,840 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:00:43,945 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-12-02 06:00:43,945 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 06:00:43,945 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 06:00:43,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139350670] [2024-12-02 06:00:43,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139350670] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 06:00:43,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 06:00:43,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 06:00:43,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363794283] [2024-12-02 06:00:43,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:00:43,946 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 06:00:43,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 06:00:43,946 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 06:00:43,946 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-12-02 06:00:43,953 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-12-02 06:00:43,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 452 transitions, 7883 flow. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 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 06:00:43,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 06:00:43,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-12-02 06:00:43,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 06:00:46,227 INFO L124 PetriNetUnfolderBase]: 8969/14986 cut-off events. [2024-12-02 06:00:46,227 INFO L125 PetriNetUnfolderBase]: For 246447/247109 co-relation queries the response was YES. [2024-12-02 06:00:46,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97631 conditions, 14986 events. 8969/14986 cut-off events. For 246447/247109 co-relation queries the response was YES. Maximal size of possible extension queue 754. Compared 109880 event pairs, 2044 based on Foata normal form. 70/14699 useless extension candidates. Maximal degree in co-relation 95396. Up to 8690 conditions per place. [2024-12-02 06:00:46,393 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 251 selfloop transitions, 141 changer transitions 7/505 dead transitions. [2024-12-02 06:00:46,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 505 transitions, 9309 flow [2024-12-02 06:00:46,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 06:00:46,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-12-02 06:00:46,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 124 transitions. [2024-12-02 06:00:46,395 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5299145299145299 [2024-12-02 06:00:46,395 INFO L175 Difference]: Start difference. First operand has 158 places, 452 transitions, 7883 flow. Second operand 6 states and 124 transitions. [2024-12-02 06:00:46,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 505 transitions, 9309 flow [2024-12-02 06:00:47,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 505 transitions, 9083 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-12-02 06:00:47,470 INFO L231 Difference]: Finished difference. Result has 160 places, 454 transitions, 8031 flow [2024-12-02 06:00:47,470 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=7669, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8031, PETRI_PLACES=160, PETRI_TRANSITIONS=454} [2024-12-02 06:00:47,470 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 122 predicate places. [2024-12-02 06:00:47,471 INFO L471 AbstractCegarLoop]: Abstraction has has 160 places, 454 transitions, 8031 flow [2024-12-02 06:00:47,471 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 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 06:00:47,471 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 06:00:47,471 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:00:47,478 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-12-02 06:00:47,671 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:00:47,671 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 06:00:47,672 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:00:47,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1013527911, now seen corresponding path program 4 times [2024-12-02 06:00:47,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 06:00:47,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1617654118] [2024-12-02 06:00:47,672 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 06:00:47,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:00:47,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:00:47,674 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:00:47,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-12-02 06:00:47,751 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 06:00:47,751 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 06:00:47,752 INFO L256 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-12-02 06:00:47,753 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:00:47,812 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 06:00:47,812 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 06:00:47,812 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 06:00:47,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617654118] [2024-12-02 06:00:47,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617654118] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 06:00:47,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 06:00:47,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 06:00:47,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146952298] [2024-12-02 06:00:47,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:00:47,813 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 06:00:47,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 06:00:47,813 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 06:00:47,813 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-12-02 06:00:47,818 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-12-02 06:00:47,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 454 transitions, 8031 flow. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 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 06:00:47,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 06:00:47,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-12-02 06:00:47,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 06:00:50,202 INFO L124 PetriNetUnfolderBase]: 9169/15270 cut-off events. [2024-12-02 06:00:50,202 INFO L125 PetriNetUnfolderBase]: For 277975/278733 co-relation queries the response was YES. [2024-12-02 06:00:50,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99473 conditions, 15270 events. 9169/15270 cut-off events. For 277975/278733 co-relation queries the response was YES. Maximal size of possible extension queue 770. Compared 112636 event pairs, 2082 based on Foata normal form. 408/15289 useless extension candidates. Maximal degree in co-relation 98570. Up to 8881 conditions per place. [2024-12-02 06:00:50,375 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 251 selfloop transitions, 150 changer transitions 0/507 dead transitions. [2024-12-02 06:00:50,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 507 transitions, 9308 flow [2024-12-02 06:00:50,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 06:00:50,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-12-02 06:00:50,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 131 transitions. [2024-12-02 06:00:50,377 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5598290598290598 [2024-12-02 06:00:50,377 INFO L175 Difference]: Start difference. First operand has 160 places, 454 transitions, 8031 flow. Second operand 6 states and 131 transitions. [2024-12-02 06:00:50,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 507 transitions, 9308 flow [2024-12-02 06:00:51,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 507 transitions, 8998 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-12-02 06:00:51,459 INFO L231 Difference]: Finished difference. Result has 161 places, 460 transitions, 8081 flow [2024-12-02 06:00:51,459 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=7463, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8081, PETRI_PLACES=161, PETRI_TRANSITIONS=460} [2024-12-02 06:00:51,460 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 123 predicate places. [2024-12-02 06:00:51,460 INFO L471 AbstractCegarLoop]: Abstraction has has 161 places, 460 transitions, 8081 flow [2024-12-02 06:00:51,460 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 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 06:00:51,460 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 06:00:51,460 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:00:51,466 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-12-02 06:00:51,660 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:00:51,661 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 06:00:51,661 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:00:51,661 INFO L85 PathProgramCache]: Analyzing trace with hash 304378669, now seen corresponding path program 5 times [2024-12-02 06:00:51,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 06:00:51,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1539309835] [2024-12-02 06:00:51,661 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 06:00:51,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:00:51,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:00:51,663 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:00:51,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-12-02 06:00:51,759 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 06:00:51,760 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 06:00:51,764 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 06:00:51,765 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:00:51,897 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 06:00:51,897 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 06:00:51,958 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 06:00:51,959 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 06:00:51,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539309835] [2024-12-02 06:00:51,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539309835] provided 1 perfect and 1 imperfect interpolant sequences [2024-12-02 06:00:51,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 06:00:51,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2024-12-02 06:00:51,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649625389] [2024-12-02 06:00:51,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:00:51,959 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 06:00:51,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 06:00:51,960 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 06:00:51,960 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-12-02 06:00:51,969 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-12-02 06:00:51,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 460 transitions, 8081 flow. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 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 06:00:51,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 06:00:51,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-12-02 06:00:51,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 06:00:54,708 INFO L124 PetriNetUnfolderBase]: 11033/18284 cut-off events. [2024-12-02 06:00:54,708 INFO L125 PetriNetUnfolderBase]: For 281879/282291 co-relation queries the response was YES. [2024-12-02 06:00:54,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115264 conditions, 18284 events. 11033/18284 cut-off events. For 281879/282291 co-relation queries the response was YES. Maximal size of possible extension queue 806. Compared 135872 event pairs, 1828 based on Foata normal form. 200/18159 useless extension candidates. Maximal degree in co-relation 114425. Up to 8285 conditions per place. [2024-12-02 06:00:54,902 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 387 selfloop transitions, 163 changer transitions 17/616 dead transitions. [2024-12-02 06:00:54,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 616 transitions, 11580 flow [2024-12-02 06:00:54,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 06:00:54,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-12-02 06:00:54,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-12-02 06:00:54,904 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.594017094017094 [2024-12-02 06:00:54,904 INFO L175 Difference]: Start difference. First operand has 161 places, 460 transitions, 8081 flow. Second operand 6 states and 139 transitions. [2024-12-02 06:00:54,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 616 transitions, 11580 flow [2024-12-02 06:00:56,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 616 transitions, 11282 flow, removed 48 selfloop flow, removed 2 redundant places. [2024-12-02 06:00:56,122 INFO L231 Difference]: Finished difference. Result has 168 places, 488 transitions, 8822 flow [2024-12-02 06:00:56,122 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=7726, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8822, PETRI_PLACES=168, PETRI_TRANSITIONS=488} [2024-12-02 06:00:56,122 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 130 predicate places. [2024-12-02 06:00:56,122 INFO L471 AbstractCegarLoop]: Abstraction has has 168 places, 488 transitions, 8822 flow [2024-12-02 06:00:56,122 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 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 06:00:56,122 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 06:00:56,123 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:00:56,130 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-12-02 06:00:56,323 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:00:56,323 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 06:00:56,323 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:00:56,323 INFO L85 PathProgramCache]: Analyzing trace with hash -758128423, now seen corresponding path program 6 times [2024-12-02 06:00:56,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 06:00:56,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [169525210] [2024-12-02 06:00:56,324 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 06:00:56,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:00:56,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:00:56,325 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:00:56,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-12-02 06:00:56,406 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-12-02 06:00:56,406 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 06:00:56,409 INFO L256 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 06:00:56,409 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:00:56,496 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-12-02 06:00:56,497 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 06:00:56,497 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 06:00:56,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169525210] [2024-12-02 06:00:56,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169525210] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 06:00:56,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 06:00:56,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 06:00:56,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828056997] [2024-12-02 06:00:56,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:00:56,497 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 06:00:56,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 06:00:56,498 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 06:00:56,498 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-12-02 06:00:56,509 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-12-02 06:00:56,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 488 transitions, 8822 flow. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 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 06:00:56,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 06:00:56,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-12-02 06:00:56,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 06:00:59,244 INFO L124 PetriNetUnfolderBase]: 10765/17770 cut-off events. [2024-12-02 06:00:59,244 INFO L125 PetriNetUnfolderBase]: For 288333/288791 co-relation queries the response was YES. [2024-12-02 06:00:59,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115632 conditions, 17770 events. 10765/17770 cut-off events. For 288333/288791 co-relation queries the response was YES. Maximal size of possible extension queue 799. Compared 131143 event pairs, 2202 based on Foata normal form. 146/17573 useless extension candidates. Maximal degree in co-relation 115513. Up to 8396 conditions per place. [2024-12-02 06:00:59,449 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 324 selfloop transitions, 158 changer transitions 20/551 dead transitions. [2024-12-02 06:00:59,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 551 transitions, 10429 flow [2024-12-02 06:00:59,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 06:00:59,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-12-02 06:00:59,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 123 transitions. [2024-12-02 06:00:59,451 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5256410256410257 [2024-12-02 06:00:59,451 INFO L175 Difference]: Start difference. First operand has 168 places, 488 transitions, 8822 flow. Second operand 6 states and 123 transitions. [2024-12-02 06:00:59,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 551 transitions, 10429 flow [2024-12-02 06:01:00,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 551 transitions, 9967 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-12-02 06:01:00,785 INFO L231 Difference]: Finished difference. Result has 163 places, 483 transitions, 8568 flow [2024-12-02 06:01:00,786 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=8382, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8568, PETRI_PLACES=163, PETRI_TRANSITIONS=483} [2024-12-02 06:01:00,786 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 125 predicate places. [2024-12-02 06:01:00,786 INFO L471 AbstractCegarLoop]: Abstraction has has 163 places, 483 transitions, 8568 flow [2024-12-02 06:01:00,786 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 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 06:01:00,786 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 06:01:00,786 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:01:00,793 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-12-02 06:01:00,987 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:01:00,987 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 06:01:00,987 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:01:00,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1248578345, now seen corresponding path program 7 times [2024-12-02 06:01:00,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 06:01:00,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [156345345] [2024-12-02 06:01:00,988 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 06:01:00,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:01:00,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:01:00,989 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:01:00,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-12-02 06:01:01,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:01:01,083 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 06:01:01,083 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:01:01,218 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 06:01:01,218 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 06:01:01,218 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 06:01:01,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156345345] [2024-12-02 06:01:01,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156345345] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 06:01:01,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 06:01:01,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 06:01:01,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317352687] [2024-12-02 06:01:01,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:01:01,219 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 06:01:01,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 06:01:01,219 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 06:01:01,219 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-12-02 06:01:01,232 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-12-02 06:01:01,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 483 transitions, 8568 flow. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 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 06:01:01,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 06:01:01,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-12-02 06:01:01,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 06:01:04,475 INFO L124 PetriNetUnfolderBase]: 12151/20224 cut-off events. [2024-12-02 06:01:04,475 INFO L125 PetriNetUnfolderBase]: For 330147/330543 co-relation queries the response was YES. [2024-12-02 06:01:04,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127147 conditions, 20224 events. 12151/20224 cut-off events. For 330147/330543 co-relation queries the response was YES. Maximal size of possible extension queue 890. Compared 152698 event pairs, 620 based on Foata normal form. 234/20249 useless extension candidates. Maximal degree in co-relation 122620. Up to 6022 conditions per place. [2024-12-02 06:01:04,657 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 380 selfloop transitions, 198 changer transitions 3/630 dead transitions. [2024-12-02 06:01:04,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 630 transitions, 12068 flow [2024-12-02 06:01:04,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-12-02 06:01:04,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-12-02 06:01:04,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-12-02 06:01:04,659 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4935897435897436 [2024-12-02 06:01:04,659 INFO L175 Difference]: Start difference. First operand has 163 places, 483 transitions, 8568 flow. Second operand 8 states and 154 transitions. [2024-12-02 06:01:04,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 630 transitions, 12068 flow [2024-12-02 06:01:05,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 630 transitions, 11659 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-12-02 06:01:05,687 INFO L231 Difference]: Finished difference. Result has 168 places, 536 transitions, 9974 flow [2024-12-02 06:01:05,687 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=8262, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9974, PETRI_PLACES=168, PETRI_TRANSITIONS=536} [2024-12-02 06:01:05,688 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 130 predicate places. [2024-12-02 06:01:05,688 INFO L471 AbstractCegarLoop]: Abstraction has has 168 places, 536 transitions, 9974 flow [2024-12-02 06:01:05,688 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 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 06:01:05,688 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 06:01:05,688 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:01:05,695 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-12-02 06:01:05,888 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:01:05,889 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 06:01:05,889 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:01:05,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1546413117, now seen corresponding path program 8 times [2024-12-02 06:01:05,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 06:01:05,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [223244893] [2024-12-02 06:01:05,889 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 06:01:05,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:01:05,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:01:05,891 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:01:05,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-12-02 06:01:05,974 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-12-02 06:01:05,974 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 06:01:05,977 INFO L256 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 06:01:05,978 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:01:06,084 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-12-02 06:01:06,085 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 06:01:06,085 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 06:01:06,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223244893] [2024-12-02 06:01:06,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223244893] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 06:01:06,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 06:01:06,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 06:01:06,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237141806] [2024-12-02 06:01:06,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:01:06,085 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 06:01:06,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 06:01:06,085 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 06:01:06,085 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-12-02 06:01:06,092 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-12-02 06:01:06,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 536 transitions, 9974 flow. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 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 06:01:06,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 06:01:06,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-12-02 06:01:06,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 06:01:09,440 INFO L124 PetriNetUnfolderBase]: 11157/18644 cut-off events. [2024-12-02 06:01:09,441 INFO L125 PetriNetUnfolderBase]: For 317255/318761 co-relation queries the response was YES. [2024-12-02 06:01:09,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117477 conditions, 18644 events. 11157/18644 cut-off events. For 317255/318761 co-relation queries the response was YES. Maximal size of possible extension queue 867. Compared 142145 event pairs, 2456 based on Foata normal form. 410/18443 useless extension candidates. Maximal degree in co-relation 110688. Up to 9234 conditions per place. [2024-12-02 06:01:09,649 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 353 selfloop transitions, 139 changer transitions 3/603 dead transitions. [2024-12-02 06:01:09,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 603 transitions, 11680 flow [2024-12-02 06:01:09,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-12-02 06:01:09,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-12-02 06:01:09,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-12-02 06:01:09,651 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5201465201465202 [2024-12-02 06:01:09,651 INFO L175 Difference]: Start difference. First operand has 168 places, 536 transitions, 9974 flow. Second operand 7 states and 142 transitions. [2024-12-02 06:01:09,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 603 transitions, 11680 flow [2024-12-02 06:01:10,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 603 transitions, 11478 flow, removed 47 selfloop flow, removed 3 redundant places. [2024-12-02 06:01:10,962 INFO L231 Difference]: Finished difference. Result has 172 places, 526 transitions, 9832 flow [2024-12-02 06:01:10,963 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=9454, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9832, PETRI_PLACES=172, PETRI_TRANSITIONS=526} [2024-12-02 06:01:10,963 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 134 predicate places. [2024-12-02 06:01:10,963 INFO L471 AbstractCegarLoop]: Abstraction has has 172 places, 526 transitions, 9832 flow [2024-12-02 06:01:10,963 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 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 06:01:10,963 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 06:01:10,963 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:01:10,970 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-12-02 06:01:11,164 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:01:11,164 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 06:01:11,164 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:01:11,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1671695045, now seen corresponding path program 9 times [2024-12-02 06:01:11,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 06:01:11,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1768362057] [2024-12-02 06:01:11,165 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 06:01:11,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:01:11,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:01:11,166 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:01:11,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-12-02 06:01:11,254 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-12-02 06:01:11,254 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 06:01:11,257 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 06:01:11,258 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:01:11,347 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 06:01:11,347 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 06:01:11,347 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 06:01:11,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768362057] [2024-12-02 06:01:11,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768362057] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 06:01:11,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 06:01:11,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 06:01:11,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129903717] [2024-12-02 06:01:11,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:01:11,347 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 06:01:11,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 06:01:11,348 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 06:01:11,348 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-12-02 06:01:11,356 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-12-02 06:01:11,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 526 transitions, 9832 flow. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 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 06:01:11,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 06:01:11,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-12-02 06:01:11,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 06:01:14,061 INFO L124 PetriNetUnfolderBase]: 10119/16580 cut-off events. [2024-12-02 06:01:14,061 INFO L125 PetriNetUnfolderBase]: For 283209/284617 co-relation queries the response was YES. [2024-12-02 06:01:14,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109894 conditions, 16580 events. 10119/16580 cut-off events. For 283209/284617 co-relation queries the response was YES. Maximal size of possible extension queue 761. Compared 120373 event pairs, 2272 based on Foata normal form. 110/16199 useless extension candidates. Maximal degree in co-relation 103162. Up to 9078 conditions per place. [2024-12-02 06:01:14,418 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 356 selfloop transitions, 99 changer transitions 5/566 dead transitions. [2024-12-02 06:01:14,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 566 transitions, 11183 flow [2024-12-02 06:01:14,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 06:01:14,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-12-02 06:01:14,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-12-02 06:01:14,420 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47863247863247865 [2024-12-02 06:01:14,420 INFO L175 Difference]: Start difference. First operand has 172 places, 526 transitions, 9832 flow. Second operand 6 states and 112 transitions. [2024-12-02 06:01:14,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 566 transitions, 11183 flow [2024-12-02 06:01:15,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 566 transitions, 10615 flow, removed 76 selfloop flow, removed 8 redundant places. [2024-12-02 06:01:15,497 INFO L231 Difference]: Finished difference. Result has 170 places, 522 transitions, 9372 flow [2024-12-02 06:01:15,497 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=9244, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=9372, PETRI_PLACES=170, PETRI_TRANSITIONS=522} [2024-12-02 06:01:15,498 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 132 predicate places. [2024-12-02 06:01:15,498 INFO L471 AbstractCegarLoop]: Abstraction has has 170 places, 522 transitions, 9372 flow [2024-12-02 06:01:15,498 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 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 06:01:15,498 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 06:01:15,498 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:01:15,505 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-12-02 06:01:15,699 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:01:15,699 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 06:01:15,699 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:01:15,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1945961889, now seen corresponding path program 1 times [2024-12-02 06:01:15,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 06:01:15,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1587423791] [2024-12-02 06:01:15,700 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:01:15,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:01:15,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:01:15,701 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:01:15,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-12-02 06:01:15,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:01:15,797 INFO L256 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-12-02 06:01:15,798 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:01:15,875 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 06:01:15,875 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 06:01:15,958 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 06:01:15,958 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 06:01:15,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587423791] [2024-12-02 06:01:15,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587423791] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 06:01:15,958 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-12-02 06:01:15,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2024-12-02 06:01:15,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839896801] [2024-12-02 06:01:15,958 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-12-02 06:01:15,958 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-12-02 06:01:15,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 06:01:15,959 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-12-02 06:01:15,959 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-12-02 06:01:16,013 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2024-12-02 06:01:16,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 522 transitions, 9372 flow. Second operand has 10 states, 10 states have (on average 14.0) internal successors, (140), 10 states have internal predecessors, (140), 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 06:01:16,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 06:01:16,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2024-12-02 06:01:16,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 06:01:20,221 INFO L124 PetriNetUnfolderBase]: 12820/22622 cut-off events. [2024-12-02 06:01:20,221 INFO L125 PetriNetUnfolderBase]: For 441601/442655 co-relation queries the response was YES. [2024-12-02 06:01:20,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140662 conditions, 22622 events. 12820/22622 cut-off events. For 441601/442655 co-relation queries the response was YES. Maximal size of possible extension queue 1020. Compared 188195 event pairs, 3424 based on Foata normal form. 2099/24150 useless extension candidates. Maximal degree in co-relation 137830. Up to 11830 conditions per place. [2024-12-02 06:01:20,444 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 354 selfloop transitions, 15 changer transitions 126/641 dead transitions. [2024-12-02 06:01:20,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 641 transitions, 12642 flow [2024-12-02 06:01:20,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-12-02 06:01:20,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-12-02 06:01:20,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-12-02 06:01:20,446 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5032051282051282 [2024-12-02 06:01:20,446 INFO L175 Difference]: Start difference. First operand has 170 places, 522 transitions, 9372 flow. Second operand 8 states and 157 transitions. [2024-12-02 06:01:20,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 641 transitions, 12642 flow [2024-12-02 06:01:22,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 641 transitions, 12280 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-12-02 06:01:22,525 INFO L231 Difference]: Finished difference. Result has 174 places, 515 transitions, 9494 flow [2024-12-02 06:01:22,525 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=9106, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9494, PETRI_PLACES=174, PETRI_TRANSITIONS=515} [2024-12-02 06:01:22,526 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 136 predicate places. [2024-12-02 06:01:22,526 INFO L471 AbstractCegarLoop]: Abstraction has has 174 places, 515 transitions, 9494 flow [2024-12-02 06:01:22,526 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.0) internal successors, (140), 10 states have internal predecessors, (140), 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 06:01:22,526 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 06:01:22,526 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:01:22,533 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-12-02 06:01:22,726 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:01:22,727 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 06:01:22,727 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:01:22,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1409377154, now seen corresponding path program 2 times [2024-12-02 06:01:22,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 06:01:22,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [912325915] [2024-12-02 06:01:22,727 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 06:01:22,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:01:22,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:01:22,729 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:01:22,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf5681a-c94f-477a-9e74-dddab0e113b9/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-12-02 06:01:48,630 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 06:01:48,630 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 06:01:48,639 INFO L256 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-12-02 06:01:48,641 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:01:49,822 INFO L349 Elim1Store]: treesize reduction 36, result has 46.3 percent of original size [2024-12-02 06:01:49,822 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 155 treesize of output 111 [2024-12-02 06:02:24,647 WARN L286 SmtUtils]: Spent 5.24s on a formula simplification that was a NOOP. DAG size: 210 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)