./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt.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_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB --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 cd36b7f18dbd530fce94e0943ff58c16da276fcc41b96fdafde87c3c69036175 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-27 20:14:53,621 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-27 20:14:53,701 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-27 20:14:53,708 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-27 20:14:53,709 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-27 20:14:53,742 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-27 20:14:53,742 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-27 20:14:53,742 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-27 20:14:53,743 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-27 20:14:53,743 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-27 20:14:53,743 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-27 20:14:53,743 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-27 20:14:53,744 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-27 20:14:53,744 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-27 20:14:53,744 INFO L153 SettingsManager]: * Use SBE=true [2024-11-27 20:14:53,744 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-27 20:14:53,744 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-27 20:14:53,745 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-27 20:14:53,745 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-27 20:14:53,745 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-27 20:14:53,745 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-27 20:14:53,745 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-27 20:14:53,745 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-27 20:14:53,746 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-27 20:14:53,746 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-27 20:14:53,746 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-27 20:14:53,746 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-27 20:14:53,746 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-27 20:14:53,746 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-27 20:14:53,747 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 20:14:53,747 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 20:14:53,747 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 20:14:53,747 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:14:53,747 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-27 20:14:53,747 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 20:14:53,747 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 20:14:53,748 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 20:14:53,748 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:14:53,748 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-27 20:14:53,748 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-27 20:14:53,748 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-27 20:14:53,748 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-27 20:14:53,749 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-27 20:14:53,749 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-27 20:14:53,749 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-27 20:14:53,749 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-27 20:14:53,749 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-27 20:14:53,749 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-27 20:14:53,749 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_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB 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 -> cd36b7f18dbd530fce94e0943ff58c16da276fcc41b96fdafde87c3c69036175 [2024-11-27 20:14:54,099 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-27 20:14:54,116 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-27 20:14:54,124 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-27 20:14:54,125 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-27 20:14:54,126 INFO L274 PluginConnector]: CDTParser initialized [2024-11-27 20:14:54,129 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c [2024-11-27 20:14:57,853 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/data/53c5d06bd/da29486276664f478a2ce9bbbc2e1ad1/FLAGf15d560b6 [2024-11-27 20:14:58,272 INFO L384 CDTParser]: Found 1 translation units. [2024-11-27 20:14:58,273 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c [2024-11-27 20:14:58,283 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/data/53c5d06bd/da29486276664f478a2ce9bbbc2e1ad1/FLAGf15d560b6 [2024-11-27 20:14:58,452 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/data/53c5d06bd/da29486276664f478a2ce9bbbc2e1ad1 [2024-11-27 20:14:58,455 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-27 20:14:58,457 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-27 20:14:58,459 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-27 20:14:58,459 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-27 20:14:58,465 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-27 20:14:58,466 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 08:14:58" (1/1) ... [2024-11-27 20:14:58,467 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1dfdea8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:14:58, skipping insertion in model container [2024-11-27 20:14:58,467 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 08:14:58" (1/1) ... [2024-11-27 20:14:58,488 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-27 20:14:58,767 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_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c[2368,2381] [2024-11-27 20:14:58,791 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 20:14:58,807 INFO L200 MainTranslator]: Completed pre-run [2024-11-27 20:14:58,848 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_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c[2368,2381] [2024-11-27 20:14:58,860 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 20:14:58,882 INFO L204 MainTranslator]: Completed translation [2024-11-27 20:14:58,883 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:14:58 WrapperNode [2024-11-27 20:14:58,884 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-27 20:14:58,885 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-27 20:14:58,885 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-27 20:14:58,885 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-27 20:14:58,899 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:14:58" (1/1) ... [2024-11-27 20:14:58,907 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:14:58" (1/1) ... [2024-11-27 20:14:58,950 INFO L138 Inliner]: procedures = 22, calls = 24, calls flagged for inlining = 12, calls inlined = 16, statements flattened = 180 [2024-11-27 20:14:58,950 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-27 20:14:58,951 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-27 20:14:58,951 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-27 20:14:58,951 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-27 20:14:58,963 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:14:58" (1/1) ... [2024-11-27 20:14:58,964 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:14:58" (1/1) ... [2024-11-27 20:14:58,971 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:14:58" (1/1) ... [2024-11-27 20:14:59,005 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-27 20:14:59,006 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:14:58" (1/1) ... [2024-11-27 20:14:59,006 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:14:58" (1/1) ... [2024-11-27 20:14:59,014 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:14:58" (1/1) ... [2024-11-27 20:14:59,016 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:14:58" (1/1) ... [2024-11-27 20:14:59,020 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:14:58" (1/1) ... [2024-11-27 20:14:59,022 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:14:58" (1/1) ... [2024-11-27 20:14:59,024 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:14:58" (1/1) ... [2024-11-27 20:14:59,027 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-27 20:14:59,028 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-27 20:14:59,028 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-27 20:14:59,028 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-27 20:14:59,030 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:14:58" (1/1) ... [2024-11-27 20:14:59,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:14:59,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:14:59,075 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-27 20:14:59,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-27 20:14:59,108 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-27 20:14:59,108 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-27 20:14:59,108 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-27 20:14:59,108 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-27 20:14:59,108 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-27 20:14:59,108 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-27 20:14:59,108 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-27 20:14:59,109 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-27 20:14:59,109 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-27 20:14:59,109 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-27 20:14:59,109 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-27 20:14:59,109 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-27 20:14:59,109 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-27 20:14:59,109 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-27 20:14:59,111 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-27 20:14:59,111 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-27 20:14:59,113 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-27 20:14:59,308 INFO L234 CfgBuilder]: Building ICFG [2024-11-27 20:14:59,312 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-27 20:14:59,843 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-27 20:14:59,843 INFO L283 CfgBuilder]: Performing block encoding [2024-11-27 20:15:00,340 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-27 20:15:00,341 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-27 20:15:00,341 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 08:15:00 BoogieIcfgContainer [2024-11-27 20:15:00,342 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-27 20:15:00,347 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-27 20:15:00,347 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-27 20:15:00,354 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-27 20:15:00,354 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 08:14:58" (1/3) ... [2024-11-27 20:15:00,355 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@254c6f7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 08:15:00, skipping insertion in model container [2024-11-27 20:15:00,355 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:14:58" (2/3) ... [2024-11-27 20:15:00,355 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@254c6f7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 08:15:00, skipping insertion in model container [2024-11-27 20:15:00,356 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 08:15:00" (3/3) ... [2024-11-27 20:15:00,357 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum-alt.wvr.c [2024-11-27 20:15:00,408 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-27 20:15:00,410 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-more-array-sum-alt.wvr.c that has 4 procedures, 28 locations, 1 initial locations, 4 loop locations, and 1 error locations. [2024-11-27 20:15:00,411 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-27 20:15:00,491 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-27 20:15:00,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 37 places, 31 transitions, 83 flow [2024-11-27 20:15:00,572 INFO L124 PetriNetUnfolderBase]: 4/28 cut-off events. [2024-11-27 20:15:00,575 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-27 20:15:00,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41 conditions, 28 events. 4/28 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 32 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 22. Up to 2 conditions per place. [2024-11-27 20:15:00,579 INFO L82 GeneralOperation]: Start removeDead. Operand has 37 places, 31 transitions, 83 flow [2024-11-27 20:15:00,582 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 33 places, 27 transitions, 72 flow [2024-11-27 20:15:00,593 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-27 20:15:00,612 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;@e11c408, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-27 20:15:00,613 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-11-27 20:15:00,631 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-27 20:15:00,631 INFO L124 PetriNetUnfolderBase]: 4/26 cut-off events. [2024-11-27 20:15:00,631 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-27 20:15:00,631 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:15:00,632 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:15:00,633 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)] === [2024-11-27 20:15:00,640 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:15:00,640 INFO L85 PathProgramCache]: Analyzing trace with hash 2003546243, now seen corresponding path program 1 times [2024-11-27 20:15:00,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:15:00,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287764019] [2024-11-27 20:15:00,652 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:15:00,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:15:00,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:15:01,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:15:01,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:15:01,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287764019] [2024-11-27 20:15:01,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287764019] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:15:01,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:15:01,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 20:15:01,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367059864] [2024-11-27 20:15:01,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:15:01,243 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 20:15:01,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:15:01,298 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 20:15:01,298 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 20:15:01,314 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-27 20:15:01,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 27 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:15:01,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:15:01,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-27 20:15:01,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:15:01,838 INFO L124 PetriNetUnfolderBase]: 817/1179 cut-off events. [2024-11-27 20:15:01,839 INFO L125 PetriNetUnfolderBase]: For 114/114 co-relation queries the response was YES. [2024-11-27 20:15:01,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2478 conditions, 1179 events. 817/1179 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 4411 event pairs, 226 based on Foata normal form. 1/935 useless extension candidates. Maximal degree in co-relation 2122. Up to 803 conditions per place. [2024-11-27 20:15:01,863 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 40 selfloop transitions, 4 changer transitions 1/46 dead transitions. [2024-11-27 20:15:01,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 46 transitions, 215 flow [2024-11-27 20:15:01,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 20:15:01,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-27 20:15:01,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 58 transitions. [2024-11-27 20:15:01,885 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6236559139784946 [2024-11-27 20:15:01,889 INFO L175 Difference]: Start difference. First operand has 33 places, 27 transitions, 72 flow. Second operand 3 states and 58 transitions. [2024-11-27 20:15:01,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 46 transitions, 215 flow [2024-11-27 20:15:01,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 46 transitions, 193 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-27 20:15:01,906 INFO L231 Difference]: Finished difference. Result has 30 places, 30 transitions, 86 flow [2024-11-27 20:15:01,911 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=30, PETRI_TRANSITIONS=30} [2024-11-27 20:15:01,915 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, -3 predicate places. [2024-11-27 20:15:01,915 INFO L471 AbstractCegarLoop]: Abstraction has has 30 places, 30 transitions, 86 flow [2024-11-27 20:15:01,916 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:15:01,916 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:15:01,916 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] [2024-11-27 20:15:01,916 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-27 20:15:01,916 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)] === [2024-11-27 20:15:01,917 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:15:01,917 INFO L85 PathProgramCache]: Analyzing trace with hash -701610755, now seen corresponding path program 1 times [2024-11-27 20:15:01,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:15:01,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805948753] [2024-11-27 20:15:01,918 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:15:01,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:15:01,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:15:02,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:15:02,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:15:02,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805948753] [2024-11-27 20:15:02,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805948753] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:15:02,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:15:02,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 20:15:02,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76456399] [2024-11-27 20:15:02,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:15:02,267 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:15:02,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:15:02,268 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:15:02,268 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-27 20:15:02,269 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-11-27 20:15:02,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 30 transitions, 86 flow. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:15:02,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:15:02,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-11-27 20:15:02,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:15:02,896 INFO L124 PetriNetUnfolderBase]: 1270/1951 cut-off events. [2024-11-27 20:15:02,897 INFO L125 PetriNetUnfolderBase]: For 157/172 co-relation queries the response was YES. [2024-11-27 20:15:02,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4169 conditions, 1951 events. 1270/1951 cut-off events. For 157/172 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 9026 event pairs, 776 based on Foata normal form. 117/1794 useless extension candidates. Maximal degree in co-relation 1532. Up to 981 conditions per place. [2024-11-27 20:15:02,924 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 55 selfloop transitions, 5 changer transitions 0/65 dead transitions. [2024-11-27 20:15:02,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 65 transitions, 286 flow [2024-11-27 20:15:02,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:15:02,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 20:15:02,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-11-27 20:15:02,926 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5806451612903226 [2024-11-27 20:15:02,926 INFO L175 Difference]: Start difference. First operand has 30 places, 30 transitions, 86 flow. Second operand 5 states and 90 transitions. [2024-11-27 20:15:02,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 65 transitions, 286 flow [2024-11-27 20:15:02,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 65 transitions, 282 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-27 20:15:02,931 INFO L231 Difference]: Finished difference. Result has 36 places, 34 transitions, 120 flow [2024-11-27 20:15:02,931 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=120, PETRI_PLACES=36, PETRI_TRANSITIONS=34} [2024-11-27 20:15:02,933 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 3 predicate places. [2024-11-27 20:15:02,933 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 34 transitions, 120 flow [2024-11-27 20:15:02,933 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:15:02,934 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:15:02,934 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] [2024-11-27 20:15:02,935 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-27 20:15:02,935 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)] === [2024-11-27 20:15:02,937 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:15:02,937 INFO L85 PathProgramCache]: Analyzing trace with hash -157112489, now seen corresponding path program 1 times [2024-11-27 20:15:02,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:15:02,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676073595] [2024-11-27 20:15:02,937 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:15:02,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:15:03,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:15:03,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:15:03,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:15:03,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676073595] [2024-11-27 20:15:03,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676073595] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:15:03,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401952604] [2024-11-27 20:15:03,384 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:15:03,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:15:03,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:15:03,389 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:15:03,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-27 20:15:03,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:15:03,557 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-27 20:15:03,563 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:15:03,801 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:15:03,802 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:15:03,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:15:03,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401952604] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-27 20:15:03,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:15:03,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2024-11-27 20:15:03,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972228081] [2024-11-27 20:15:03,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:15:03,932 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-27 20:15:03,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:15:03,933 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-27 20:15:03,933 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-11-27 20:15:03,934 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-11-27 20:15:03,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 34 transitions, 120 flow. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:15:03,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:15:03,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-11-27 20:15:03,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:15:04,908 INFO L124 PetriNetUnfolderBase]: 1546/2420 cut-off events. [2024-11-27 20:15:04,909 INFO L125 PetriNetUnfolderBase]: For 1238/1238 co-relation queries the response was YES. [2024-11-27 20:15:04,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5791 conditions, 2420 events. 1546/2420 cut-off events. For 1238/1238 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 11912 event pairs, 555 based on Foata normal form. 0/2101 useless extension candidates. Maximal degree in co-relation 3561. Up to 634 conditions per place. [2024-11-27 20:15:04,928 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 96 selfloop transitions, 18 changer transitions 0/119 dead transitions. [2024-11-27 20:15:04,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 119 transitions, 609 flow [2024-11-27 20:15:04,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-27 20:15:04,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-27 20:15:04,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-11-27 20:15:04,931 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5451612903225806 [2024-11-27 20:15:04,931 INFO L175 Difference]: Start difference. First operand has 36 places, 34 transitions, 120 flow. Second operand 10 states and 169 transitions. [2024-11-27 20:15:04,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 119 transitions, 609 flow [2024-11-27 20:15:04,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 119 transitions, 605 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-27 20:15:04,936 INFO L231 Difference]: Finished difference. Result has 50 places, 48 transitions, 225 flow [2024-11-27 20:15:04,937 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=225, PETRI_PLACES=50, PETRI_TRANSITIONS=48} [2024-11-27 20:15:04,938 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 17 predicate places. [2024-11-27 20:15:04,938 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 48 transitions, 225 flow [2024-11-27 20:15:04,938 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:15:04,938 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:15:04,938 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] [2024-11-27 20:15:04,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-27 20:15:05,139 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:15:05,141 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)] === [2024-11-27 20:15:05,142 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:15:05,142 INFO L85 PathProgramCache]: Analyzing trace with hash 882206161, now seen corresponding path program 2 times [2024-11-27 20:15:05,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:15:05,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261542496] [2024-11-27 20:15:05,143 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:15:05,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:15:05,189 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:15:05,189 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:15:05,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:15:05,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:15:05,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261542496] [2024-11-27 20:15:05,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261542496] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:15:05,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377267363] [2024-11-27 20:15:05,491 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:15:05,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:15:05,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:15:05,495 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:15:05,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-27 20:15:05,636 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:15:05,636 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:15:05,637 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-27 20:15:05,639 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:15:05,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:15:05,771 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:15:05,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:15:05,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377267363] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-27 20:15:05,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:15:05,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2024-11-27 20:15:05,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262455982] [2024-11-27 20:15:05,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:15:05,920 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-27 20:15:05,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:15:05,921 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-27 20:15:05,921 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-11-27 20:15:05,921 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-11-27 20:15:05,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 48 transitions, 225 flow. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:15:05,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:15:05,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-11-27 20:15:05,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:15:06,950 INFO L124 PetriNetUnfolderBase]: 1822/2822 cut-off events. [2024-11-27 20:15:06,951 INFO L125 PetriNetUnfolderBase]: For 3357/3357 co-relation queries the response was YES. [2024-11-27 20:15:06,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8553 conditions, 2822 events. 1822/2822 cut-off events. For 3357/3357 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 13960 event pairs, 488 based on Foata normal form. 12/2820 useless extension candidates. Maximal degree in co-relation 5994. Up to 520 conditions per place. [2024-11-27 20:15:06,977 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 106 selfloop transitions, 37 changer transitions 0/148 dead transitions. [2024-11-27 20:15:06,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 148 transitions, 935 flow [2024-11-27 20:15:06,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-27 20:15:06,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-27 20:15:06,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 190 transitions. [2024-11-27 20:15:06,983 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.510752688172043 [2024-11-27 20:15:06,983 INFO L175 Difference]: Start difference. First operand has 50 places, 48 transitions, 225 flow. Second operand 12 states and 190 transitions. [2024-11-27 20:15:06,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 148 transitions, 935 flow [2024-11-27 20:15:07,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 148 transitions, 932 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-27 20:15:07,023 INFO L231 Difference]: Finished difference. Result has 66 places, 73 transitions, 491 flow [2024-11-27 20:15:07,024 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=491, PETRI_PLACES=66, PETRI_TRANSITIONS=73} [2024-11-27 20:15:07,025 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 33 predicate places. [2024-11-27 20:15:07,026 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 73 transitions, 491 flow [2024-11-27 20:15:07,027 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:15:07,027 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:15:07,027 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] [2024-11-27 20:15:07,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-27 20:15:07,231 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:15:07,232 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)] === [2024-11-27 20:15:07,232 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:15:07,232 INFO L85 PathProgramCache]: Analyzing trace with hash 342040991, now seen corresponding path program 3 times [2024-11-27 20:15:07,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:15:07,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554990086] [2024-11-27 20:15:07,233 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 20:15:07,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:15:07,274 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-27 20:15:07,275 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:15:07,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:15:07,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:15:07,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554990086] [2024-11-27 20:15:07,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554990086] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:15:07,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727987333] [2024-11-27 20:15:07,545 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 20:15:07,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:15:07,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:15:07,550 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:15:07,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-27 20:15:07,677 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-27 20:15:07,677 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:15:07,679 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-27 20:15:07,681 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:15:07,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:15:07,836 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:15:07,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:15:07,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727987333] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-27 20:15:07,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:15:07,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 14 [2024-11-27 20:15:07,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270277730] [2024-11-27 20:15:07,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:15:07,972 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-27 20:15:07,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:15:07,972 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-27 20:15:07,973 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2024-11-27 20:15:07,973 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-11-27 20:15:07,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 73 transitions, 491 flow. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:15:07,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:15:07,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-11-27 20:15:07,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:15:09,052 INFO L124 PetriNetUnfolderBase]: 2231/3463 cut-off events. [2024-11-27 20:15:09,052 INFO L125 PetriNetUnfolderBase]: For 8994/8994 co-relation queries the response was YES. [2024-11-27 20:15:09,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13046 conditions, 3463 events. 2231/3463 cut-off events. For 8994/8994 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 17817 event pairs, 675 based on Foata normal form. 14/3459 useless extension candidates. Maximal degree in co-relation 10753. Up to 946 conditions per place. [2024-11-27 20:15:09,093 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 109 selfloop transitions, 56 changer transitions 0/170 dead transitions. [2024-11-27 20:15:09,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 170 transitions, 1333 flow [2024-11-27 20:15:09,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-27 20:15:09,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-27 20:15:09,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 191 transitions. [2024-11-27 20:15:09,100 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5601173020527859 [2024-11-27 20:15:09,100 INFO L175 Difference]: Start difference. First operand has 66 places, 73 transitions, 491 flow. Second operand 11 states and 191 transitions. [2024-11-27 20:15:09,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 170 transitions, 1333 flow [2024-11-27 20:15:09,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 170 transitions, 1284 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-11-27 20:15:09,191 INFO L231 Difference]: Finished difference. Result has 79 places, 97 transitions, 857 flow [2024-11-27 20:15:09,191 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=462, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=857, PETRI_PLACES=79, PETRI_TRANSITIONS=97} [2024-11-27 20:15:09,193 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 46 predicate places. [2024-11-27 20:15:09,194 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 97 transitions, 857 flow [2024-11-27 20:15:09,194 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:15:09,194 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:15:09,194 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] [2024-11-27 20:15:09,207 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-27 20:15:09,398 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:15:09,399 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)] === [2024-11-27 20:15:09,400 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:15:09,400 INFO L85 PathProgramCache]: Analyzing trace with hash -2084057715, now seen corresponding path program 4 times [2024-11-27 20:15:09,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:15:09,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397175279] [2024-11-27 20:15:09,400 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 20:15:09,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:15:09,433 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 20:15:09,437 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:15:09,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:15:09,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:15:09,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397175279] [2024-11-27 20:15:09,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397175279] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:15:09,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999721045] [2024-11-27 20:15:09,599 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 20:15:09,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:15:09,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:15:09,602 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:15:09,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-27 20:15:09,730 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 20:15:09,730 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:15:09,732 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-27 20:15:09,734 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:15:09,888 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:15:09,888 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:15:10,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:15:10,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999721045] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-27 20:15:10,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:15:10,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 14 [2024-11-27 20:15:10,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485739392] [2024-11-27 20:15:10,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:15:10,026 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-27 20:15:10,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:15:10,026 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-27 20:15:10,027 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2024-11-27 20:15:10,027 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-11-27 20:15:10,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 97 transitions, 857 flow. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:15:10,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:15:10,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-11-27 20:15:10,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:15:11,100 INFO L124 PetriNetUnfolderBase]: 2279/3549 cut-off events. [2024-11-27 20:15:11,100 INFO L125 PetriNetUnfolderBase]: For 14246/14246 co-relation queries the response was YES. [2024-11-27 20:15:11,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15125 conditions, 3549 events. 2279/3549 cut-off events. For 14246/14246 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 18512 event pairs, 614 based on Foata normal form. 14/3545 useless extension candidates. Maximal degree in co-relation 12334. Up to 763 conditions per place. [2024-11-27 20:15:11,141 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 106 selfloop transitions, 55 changer transitions 0/166 dead transitions. [2024-11-27 20:15:11,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 166 transitions, 1541 flow [2024-11-27 20:15:11,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-27 20:15:11,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-27 20:15:11,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-11-27 20:15:11,143 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5612903225806452 [2024-11-27 20:15:11,144 INFO L175 Difference]: Start difference. First operand has 79 places, 97 transitions, 857 flow. Second operand 10 states and 174 transitions. [2024-11-27 20:15:11,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 166 transitions, 1541 flow [2024-11-27 20:15:11,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 166 transitions, 1472 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-11-27 20:15:11,242 INFO L231 Difference]: Finished difference. Result has 87 places, 104 transitions, 1056 flow [2024-11-27 20:15:11,242 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=802, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1056, PETRI_PLACES=87, PETRI_TRANSITIONS=104} [2024-11-27 20:15:11,243 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 54 predicate places. [2024-11-27 20:15:11,243 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 104 transitions, 1056 flow [2024-11-27 20:15:11,243 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:15:11,244 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:15:11,244 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] [2024-11-27 20:15:11,256 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-27 20:15:11,448 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:15:11,448 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)] === [2024-11-27 20:15:11,449 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:15:11,449 INFO L85 PathProgramCache]: Analyzing trace with hash 443032481, now seen corresponding path program 5 times [2024-11-27 20:15:11,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:15:11,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457896184] [2024-11-27 20:15:11,450 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 20:15:11,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:15:11,478 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:15:11,478 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:15:11,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:15:11,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:15:11,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457896184] [2024-11-27 20:15:11,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457896184] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:15:11,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477683148] [2024-11-27 20:15:11,637 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 20:15:11,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:15:11,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:15:11,640 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:15:11,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-27 20:15:11,767 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:15:11,767 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:15:11,769 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-27 20:15:11,770 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:15:11,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:15:11,921 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:15:12,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:15:12,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477683148] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:15:12,034 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:15:12,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2024-11-27 20:15:12,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771311366] [2024-11-27 20:15:12,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:15:12,035 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-27 20:15:12,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:15:12,036 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-27 20:15:12,036 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2024-11-27 20:15:12,037 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-11-27 20:15:12,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 104 transitions, 1056 flow. Second operand has 14 states, 14 states have (on average 8.928571428571429) internal successors, (125), 14 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:15:12,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:15:12,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-11-27 20:15:12,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:15:14,348 INFO L124 PetriNetUnfolderBase]: 2673/4122 cut-off events. [2024-11-27 20:15:14,348 INFO L125 PetriNetUnfolderBase]: For 20429/20433 co-relation queries the response was YES. [2024-11-27 20:15:14,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18560 conditions, 4122 events. 2673/4122 cut-off events. For 20429/20433 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 22453 event pairs, 402 based on Foata normal form. 16/4116 useless extension candidates. Maximal degree in co-relation 16074. Up to 772 conditions per place. [2024-11-27 20:15:14,392 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 176 selfloop transitions, 166 changer transitions 0/347 dead transitions. [2024-11-27 20:15:14,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 347 transitions, 3732 flow [2024-11-27 20:15:14,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-27 20:15:14,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-11-27 20:15:14,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 398 transitions. [2024-11-27 20:15:14,395 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4755077658303465 [2024-11-27 20:15:14,396 INFO L175 Difference]: Start difference. First operand has 87 places, 104 transitions, 1056 flow. Second operand 27 states and 398 transitions. [2024-11-27 20:15:14,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 347 transitions, 3732 flow [2024-11-27 20:15:14,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 347 transitions, 3631 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-11-27 20:15:14,528 INFO L231 Difference]: Finished difference. Result has 121 places, 217 transitions, 2765 flow [2024-11-27 20:15:14,529 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1013, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2765, PETRI_PLACES=121, PETRI_TRANSITIONS=217} [2024-11-27 20:15:14,529 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 88 predicate places. [2024-11-27 20:15:14,531 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 217 transitions, 2765 flow [2024-11-27 20:15:14,531 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 8.928571428571429) internal successors, (125), 14 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:15:14,531 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:15:14,532 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] [2024-11-27 20:15:14,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-27 20:15:14,732 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:15:14,732 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)] === [2024-11-27 20:15:14,733 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:15:14,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1052367671, now seen corresponding path program 6 times [2024-11-27 20:15:14,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:15:14,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662838726] [2024-11-27 20:15:14,733 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 20:15:14,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:15:14,770 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-27 20:15:14,770 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:15:14,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:15:14,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:15:14,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662838726] [2024-11-27 20:15:14,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662838726] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:15:14,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814706808] [2024-11-27 20:15:14,982 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 20:15:14,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:15:14,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:15:14,985 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:15:14,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-27 20:15:15,104 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-27 20:15:15,105 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:15:15,106 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-27 20:15:15,108 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:15:15,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:15:15,238 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:15:15,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:15:15,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814706808] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-27 20:15:15,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:15:15,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 15 [2024-11-27 20:15:15,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326607083] [2024-11-27 20:15:15,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:15:15,377 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-27 20:15:15,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:15:15,378 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-27 20:15:15,378 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2024-11-27 20:15:15,378 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-11-27 20:15:15,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 217 transitions, 2765 flow. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:15:15,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:15:15,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-11-27 20:15:15,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:15:16,685 INFO L124 PetriNetUnfolderBase]: 2663/4106 cut-off events. [2024-11-27 20:15:16,686 INFO L125 PetriNetUnfolderBase]: For 30112/30122 co-relation queries the response was YES. [2024-11-27 20:15:16,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21095 conditions, 4106 events. 2663/4106 cut-off events. For 30112/30122 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 21915 event pairs, 451 based on Foata normal form. 22/4107 useless extension candidates. Maximal degree in co-relation 19227. Up to 762 conditions per place. [2024-11-27 20:15:16,744 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 157 selfloop transitions, 135 changer transitions 0/297 dead transitions. [2024-11-27 20:15:16,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 297 transitions, 3780 flow [2024-11-27 20:15:16,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-27 20:15:16,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-27 20:15:16,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 195 transitions. [2024-11-27 20:15:16,747 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5241935483870968 [2024-11-27 20:15:16,747 INFO L175 Difference]: Start difference. First operand has 121 places, 217 transitions, 2765 flow. Second operand 12 states and 195 transitions. [2024-11-27 20:15:16,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 297 transitions, 3780 flow [2024-11-27 20:15:17,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 297 transitions, 3640 flow, removed 56 selfloop flow, removed 3 redundant places. [2024-11-27 20:15:17,029 INFO L231 Difference]: Finished difference. Result has 132 places, 222 transitions, 3134 flow [2024-11-27 20:15:17,030 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2655, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3134, PETRI_PLACES=132, PETRI_TRANSITIONS=222} [2024-11-27 20:15:17,030 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 99 predicate places. [2024-11-27 20:15:17,031 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 222 transitions, 3134 flow [2024-11-27 20:15:17,031 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:15:17,031 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:15:17,031 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] [2024-11-27 20:15:17,046 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-27 20:15:17,231 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:15:17,232 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)] === [2024-11-27 20:15:17,232 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:15:17,232 INFO L85 PathProgramCache]: Analyzing trace with hash 2037726802, now seen corresponding path program 1 times [2024-11-27 20:15:17,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:15:17,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149565012] [2024-11-27 20:15:17,233 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:15:17,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:15:17,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:15:17,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:15:17,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:15:17,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149565012] [2024-11-27 20:15:17,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149565012] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:15:17,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:15:17,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 20:15:17,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901425089] [2024-11-27 20:15:17,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:15:17,440 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:15:17,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:15:17,441 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:15:17,441 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-27 20:15:17,441 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-11-27 20:15:17,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 222 transitions, 3134 flow. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 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) [2024-11-27 20:15:17,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:15:17,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-11-27 20:15:17,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:15:18,200 INFO L124 PetriNetUnfolderBase]: 2277/3491 cut-off events. [2024-11-27 20:15:18,200 INFO L125 PetriNetUnfolderBase]: For 37444/37444 co-relation queries the response was YES. [2024-11-27 20:15:18,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19875 conditions, 3491 events. 2277/3491 cut-off events. For 37444/37444 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 17908 event pairs, 838 based on Foata normal form. 69/3522 useless extension candidates. Maximal degree in co-relation 18259. Up to 2664 conditions per place. [2024-11-27 20:15:18,233 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 215 selfloop transitions, 7 changer transitions 0/227 dead transitions. [2024-11-27 20:15:18,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 227 transitions, 3549 flow [2024-11-27 20:15:18,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:15:18,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 20:15:18,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 85 transitions. [2024-11-27 20:15:18,235 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5483870967741935 [2024-11-27 20:15:18,235 INFO L175 Difference]: Start difference. First operand has 132 places, 222 transitions, 3134 flow. Second operand 5 states and 85 transitions. [2024-11-27 20:15:18,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 227 transitions, 3549 flow [2024-11-27 20:15:18,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 227 transitions, 3424 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-11-27 20:15:18,482 INFO L231 Difference]: Finished difference. Result has 122 places, 201 transitions, 2870 flow [2024-11-27 20:15:18,483 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2844, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2870, PETRI_PLACES=122, PETRI_TRANSITIONS=201} [2024-11-27 20:15:18,485 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 89 predicate places. [2024-11-27 20:15:18,485 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 201 transitions, 2870 flow [2024-11-27 20:15:18,485 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 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) [2024-11-27 20:15:18,486 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:15:18,486 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] [2024-11-27 20:15:18,486 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-27 20:15:18,487 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)] === [2024-11-27 20:15:18,487 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:15:18,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1968602648, now seen corresponding path program 1 times [2024-11-27 20:15:18,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:15:18,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955248261] [2024-11-27 20:15:18,488 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:15:18,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:15:18,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:15:18,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:15:18,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:15:18,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955248261] [2024-11-27 20:15:18,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955248261] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:15:18,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:15:18,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 20:15:18,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338501745] [2024-11-27 20:15:18,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:15:18,669 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:15:18,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:15:18,670 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:15:18,670 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-27 20:15:18,670 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-11-27 20:15:18,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 201 transitions, 2870 flow. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 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) [2024-11-27 20:15:18,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:15:18,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-11-27 20:15:18,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:15:19,406 INFO L124 PetriNetUnfolderBase]: 2069/3143 cut-off events. [2024-11-27 20:15:19,407 INFO L125 PetriNetUnfolderBase]: For 34035/34035 co-relation queries the response was YES. [2024-11-27 20:15:19,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18204 conditions, 3143 events. 2069/3143 cut-off events. For 34035/34035 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 15299 event pairs, 773 based on Foata normal form. 22/3127 useless extension candidates. Maximal degree in co-relation 17448. Up to 2664 conditions per place. [2024-11-27 20:15:19,433 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 179 selfloop transitions, 2 changer transitions 23/209 dead transitions. [2024-11-27 20:15:19,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 209 transitions, 3286 flow [2024-11-27 20:15:19,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:15:19,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 20:15:19,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2024-11-27 20:15:19,435 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5096774193548387 [2024-11-27 20:15:19,435 INFO L175 Difference]: Start difference. First operand has 122 places, 201 transitions, 2870 flow. Second operand 5 states and 79 transitions. [2024-11-27 20:15:19,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 209 transitions, 3286 flow [2024-11-27 20:15:19,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 209 transitions, 3149 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-11-27 20:15:19,662 INFO L231 Difference]: Finished difference. Result has 115 places, 186 transitions, 2651 flow [2024-11-27 20:15:19,662 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2679, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2651, PETRI_PLACES=115, PETRI_TRANSITIONS=186} [2024-11-27 20:15:19,663 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 82 predicate places. [2024-11-27 20:15:19,663 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 186 transitions, 2651 flow [2024-11-27 20:15:19,663 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 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) [2024-11-27 20:15:19,664 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:15:19,664 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] [2024-11-27 20:15:19,664 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-27 20:15:19,664 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)] === [2024-11-27 20:15:19,664 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:15:19,664 INFO L85 PathProgramCache]: Analyzing trace with hash 117467052, now seen corresponding path program 1 times [2024-11-27 20:15:19,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:15:19,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826083550] [2024-11-27 20:15:19,665 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:15:19,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:15:19,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:15:19,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:15:19,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:15:19,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826083550] [2024-11-27 20:15:19,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826083550] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:15:19,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737169557] [2024-11-27 20:15:19,849 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:15:19,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:15:19,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:15:19,852 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:15:19,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-27 20:15:19,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:15:19,971 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-27 20:15:19,973 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:15:20,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:15:20,026 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:15:20,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:15:20,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737169557] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-27 20:15:20,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:15:20,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2024-11-27 20:15:20,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86983664] [2024-11-27 20:15:20,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:15:20,082 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:15:20,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:15:20,084 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:15:20,084 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-11-27 20:15:20,084 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-11-27 20:15:20,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 186 transitions, 2651 flow. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:15:20,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:15:20,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-11-27 20:15:20,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:15:20,739 INFO L124 PetriNetUnfolderBase]: 2084/3100 cut-off events. [2024-11-27 20:15:20,740 INFO L125 PetriNetUnfolderBase]: For 31983/31995 co-relation queries the response was YES. [2024-11-27 20:15:20,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17985 conditions, 3100 events. 2084/3100 cut-off events. For 31983/31995 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 14964 event pairs, 449 based on Foata normal form. 168/3167 useless extension candidates. Maximal degree in co-relation 17933. Up to 2267 conditions per place. [2024-11-27 20:15:20,764 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 259 selfloop transitions, 13 changer transitions 0/277 dead transitions. [2024-11-27 20:15:20,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 277 transitions, 4606 flow [2024-11-27 20:15:20,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:15:20,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 20:15:20,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 70 transitions. [2024-11-27 20:15:20,765 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45161290322580644 [2024-11-27 20:15:20,765 INFO L175 Difference]: Start difference. First operand has 115 places, 186 transitions, 2651 flow. Second operand 5 states and 70 transitions. [2024-11-27 20:15:20,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 277 transitions, 4606 flow [2024-11-27 20:15:20,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 277 transitions, 4519 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-11-27 20:15:20,894 INFO L231 Difference]: Finished difference. Result has 108 places, 187 transitions, 2649 flow [2024-11-27 20:15:20,894 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2588, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2649, PETRI_PLACES=108, PETRI_TRANSITIONS=187} [2024-11-27 20:15:20,895 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 75 predicate places. [2024-11-27 20:15:20,895 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 187 transitions, 2649 flow [2024-11-27 20:15:20,895 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:15:20,895 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:15:20,895 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] [2024-11-27 20:15:20,903 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-27 20:15:21,096 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:15:21,096 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)] === [2024-11-27 20:15:21,097 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:15:21,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1306100268, now seen corresponding path program 1 times [2024-11-27 20:15:21,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:15:21,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264198214] [2024-11-27 20:15:21,097 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:15:21,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:15:21,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:15:22,164 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:15:22,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:15:22,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264198214] [2024-11-27 20:15:22,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264198214] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:15:22,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085028207] [2024-11-27 20:15:22,165 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:15:22,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:15:22,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:15:22,169 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:15:22,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-27 20:15:22,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:15:22,302 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-27 20:15:22,309 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:15:22,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-27 20:15:22,763 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-27 20:15:22,784 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:15:22,785 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:15:23,344 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2024-11-27 20:15:23,366 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 20:15:23,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 70 treesize of output 62 [2024-11-27 20:15:23,509 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:15:23,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085028207] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:15:23,510 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:15:23,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2024-11-27 20:15:23,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081615999] [2024-11-27 20:15:23,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:15:23,510 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-27 20:15:23,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:15:23,511 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-27 20:15:23,512 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2024-11-27 20:15:23,545 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-27 20:15:23,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 187 transitions, 2649 flow. Second operand has 22 states, 22 states have (on average 6.318181818181818) internal successors, (139), 22 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:15:23,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:15:23,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-27 20:15:23,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:15:25,849 INFO L124 PetriNetUnfolderBase]: 4393/6244 cut-off events. [2024-11-27 20:15:25,849 INFO L125 PetriNetUnfolderBase]: For 47552/47552 co-relation queries the response was YES. [2024-11-27 20:15:25,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33756 conditions, 6244 events. 4393/6244 cut-off events. For 47552/47552 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 29688 event pairs, 327 based on Foata normal form. 2/6246 useless extension candidates. Maximal degree in co-relation 29315. Up to 3993 conditions per place. [2024-11-27 20:15:25,892 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 597 selfloop transitions, 102 changer transitions 2/702 dead transitions. [2024-11-27 20:15:25,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 702 transitions, 10479 flow [2024-11-27 20:15:25,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-27 20:15:25,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-27 20:15:25,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 218 transitions. [2024-11-27 20:15:25,895 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5023041474654378 [2024-11-27 20:15:25,895 INFO L175 Difference]: Start difference. First operand has 108 places, 187 transitions, 2649 flow. Second operand 14 states and 218 transitions. [2024-11-27 20:15:25,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 702 transitions, 10479 flow [2024-11-27 20:15:26,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 702 transitions, 10441 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-11-27 20:15:26,341 INFO L231 Difference]: Finished difference. Result has 125 places, 285 transitions, 4291 flow [2024-11-27 20:15:26,342 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2630, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4291, PETRI_PLACES=125, PETRI_TRANSITIONS=285} [2024-11-27 20:15:26,343 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 92 predicate places. [2024-11-27 20:15:26,343 INFO L471 AbstractCegarLoop]: Abstraction has has 125 places, 285 transitions, 4291 flow [2024-11-27 20:15:26,343 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 6.318181818181818) internal successors, (139), 22 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:15:26,343 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:15:26,344 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] [2024-11-27 20:15:26,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-27 20:15:26,545 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:15:26,545 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)] === [2024-11-27 20:15:26,546 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:15:26,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1054631312, now seen corresponding path program 2 times [2024-11-27 20:15:26,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:15:26,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475248498] [2024-11-27 20:15:26,546 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:15:26,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:15:26,584 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:15:26,584 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:15:27,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:15:27,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:15:27,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475248498] [2024-11-27 20:15:27,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475248498] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:15:27,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664223115] [2024-11-27 20:15:27,308 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:15:27,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:15:27,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:15:27,310 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:15:27,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-27 20:15:27,426 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:15:27,426 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:15:27,428 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-27 20:15:27,431 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:15:27,489 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-27 20:15:27,946 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-27 20:15:27,959 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:15:27,960 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:15:28,567 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2024-11-27 20:15:28,585 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 20:15:28,586 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 70 treesize of output 62 [2024-11-27 20:15:28,734 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:15:28,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664223115] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:15:28,734 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:15:28,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2024-11-27 20:15:28,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671315056] [2024-11-27 20:15:28,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:15:28,735 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-27 20:15:28,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:15:28,736 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-27 20:15:28,737 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2024-11-27 20:15:28,744 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-27 20:15:28,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 285 transitions, 4291 flow. Second operand has 24 states, 24 states have (on average 6.375) internal successors, (153), 24 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:15:28,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:15:28,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-27 20:15:28,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:15:32,371 INFO L124 PetriNetUnfolderBase]: 5739/8164 cut-off events. [2024-11-27 20:15:32,371 INFO L125 PetriNetUnfolderBase]: For 70020/70020 co-relation queries the response was YES. [2024-11-27 20:15:32,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47533 conditions, 8164 events. 5739/8164 cut-off events. For 70020/70020 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 40430 event pairs, 569 based on Foata normal form. 3/8167 useless extension candidates. Maximal degree in co-relation 44347. Up to 6128 conditions per place. [2024-11-27 20:15:32,431 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 601 selfloop transitions, 237 changer transitions 2/841 dead transitions. [2024-11-27 20:15:32,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 841 transitions, 12696 flow [2024-11-27 20:15:32,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-27 20:15:32,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2024-11-27 20:15:32,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 413 transitions. [2024-11-27 20:15:32,437 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.37007168458781364 [2024-11-27 20:15:32,437 INFO L175 Difference]: Start difference. First operand has 125 places, 285 transitions, 4291 flow. Second operand 36 states and 413 transitions. [2024-11-27 20:15:32,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 841 transitions, 12696 flow [2024-11-27 20:15:33,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 841 transitions, 12624 flow, removed 35 selfloop flow, removed 1 redundant places. [2024-11-27 20:15:33,197 INFO L231 Difference]: Finished difference. Result has 177 places, 522 transitions, 8518 flow [2024-11-27 20:15:33,197 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4235, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=8518, PETRI_PLACES=177, PETRI_TRANSITIONS=522} [2024-11-27 20:15:33,198 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 144 predicate places. [2024-11-27 20:15:33,198 INFO L471 AbstractCegarLoop]: Abstraction has has 177 places, 522 transitions, 8518 flow [2024-11-27 20:15:33,198 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.375) internal successors, (153), 24 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:15:33,198 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:15:33,198 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] [2024-11-27 20:15:33,206 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-27 20:15:33,399 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-27 20:15:33,399 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)] === [2024-11-27 20:15:33,400 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:15:33,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1589968352, now seen corresponding path program 1 times [2024-11-27 20:15:33,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:15:33,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826046934] [2024-11-27 20:15:33,400 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:15:33,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:15:33,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:15:33,991 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:15:33,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:15:33,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826046934] [2024-11-27 20:15:33,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826046934] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:15:33,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566081912] [2024-11-27 20:15:33,992 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:15:33,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:15:33,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:15:33,995 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:15:33,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-27 20:15:34,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:15:34,120 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-27 20:15:34,122 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:15:34,285 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-27 20:15:34,326 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:15:34,327 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:15:34,411 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 20:15:34,411 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 19 treesize of output 16 [2024-11-27 20:15:34,480 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:15:34,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566081912] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:15:34,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:15:34,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 6] total 18 [2024-11-27 20:15:34,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857050563] [2024-11-27 20:15:34,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:15:34,481 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-27 20:15:34,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:15:34,482 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-27 20:15:34,482 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2024-11-27 20:15:34,489 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-27 20:15:34,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 522 transitions, 8518 flow. Second operand has 19 states, 19 states have (on average 6.684210526315789) internal successors, (127), 19 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:15:34,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:15:34,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-27 20:15:34,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:15:38,023 INFO L124 PetriNetUnfolderBase]: 7678/10922 cut-off events. [2024-11-27 20:15:38,023 INFO L125 PetriNetUnfolderBase]: For 105336/105336 co-relation queries the response was YES. [2024-11-27 20:15:38,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68765 conditions, 10922 events. 7678/10922 cut-off events. For 105336/105336 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 57388 event pairs, 391 based on Foata normal form. 2/10924 useless extension candidates. Maximal degree in co-relation 68157. Up to 6802 conditions per place. [2024-11-27 20:15:38,127 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 643 selfloop transitions, 280 changer transitions 1/925 dead transitions. [2024-11-27 20:15:38,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 925 transitions, 16078 flow [2024-11-27 20:15:38,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-27 20:15:38,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-27 20:15:38,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 204 transitions. [2024-11-27 20:15:38,129 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4700460829493088 [2024-11-27 20:15:38,129 INFO L175 Difference]: Start difference. First operand has 177 places, 522 transitions, 8518 flow. Second operand 14 states and 204 transitions. [2024-11-27 20:15:38,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 925 transitions, 16078 flow [2024-11-27 20:15:39,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 925 transitions, 15491 flow, removed 265 selfloop flow, removed 4 redundant places. [2024-11-27 20:15:39,453 INFO L231 Difference]: Finished difference. Result has 193 places, 664 transitions, 10893 flow [2024-11-27 20:15:39,453 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=8092, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=10893, PETRI_PLACES=193, PETRI_TRANSITIONS=664} [2024-11-27 20:15:39,454 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 160 predicate places. [2024-11-27 20:15:39,454 INFO L471 AbstractCegarLoop]: Abstraction has has 193 places, 664 transitions, 10893 flow [2024-11-27 20:15:39,455 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.684210526315789) internal successors, (127), 19 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:15:39,455 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:15:39,455 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] [2024-11-27 20:15:39,462 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-27 20:15:39,656 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-27 20:15:39,656 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)] === [2024-11-27 20:15:39,657 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:15:39,657 INFO L85 PathProgramCache]: Analyzing trace with hash 480043738, now seen corresponding path program 3 times [2024-11-27 20:15:39,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:15:39,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221900793] [2024-11-27 20:15:39,657 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 20:15:39,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:15:39,706 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-27 20:15:39,706 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:15:40,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:15:40,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:15:40,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221900793] [2024-11-27 20:15:40,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221900793] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:15:40,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822037731] [2024-11-27 20:15:40,488 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 20:15:40,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:15:40,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:15:40,491 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:15:40,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-27 20:15:40,614 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-27 20:15:40,614 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:15:40,616 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-27 20:15:40,619 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:15:40,637 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-27 20:15:40,869 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-27 20:15:40,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:15:40,883 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:15:41,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:15:41,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822037731] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:15:41,172 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:15:41,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 19 [2024-11-27 20:15:41,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444749498] [2024-11-27 20:15:41,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:15:41,173 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-27 20:15:41,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:15:41,175 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-27 20:15:41,175 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2024-11-27 20:15:41,180 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-27 20:15:41,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 664 transitions, 10893 flow. Second operand has 20 states, 20 states have (on average 6.3) internal successors, (126), 20 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:15:41,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:15:41,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-27 20:15:41,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:15:45,393 INFO L124 PetriNetUnfolderBase]: 9200/13155 cut-off events. [2024-11-27 20:15:45,393 INFO L125 PetriNetUnfolderBase]: For 140712/140712 co-relation queries the response was YES. [2024-11-27 20:15:45,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87052 conditions, 13155 events. 9200/13155 cut-off events. For 140712/140712 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 72084 event pairs, 759 based on Foata normal form. 1/13156 useless extension candidates. Maximal degree in co-relation 86400. Up to 10624 conditions per place. [2024-11-27 20:15:45,549 INFO L140 encePairwiseOnDemand]: 16/31 looper letters, 709 selfloop transitions, 299 changer transitions 1/1010 dead transitions. [2024-11-27 20:15:45,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 1010 transitions, 17436 flow [2024-11-27 20:15:45,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-27 20:15:45,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-27 20:15:45,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 200 transitions. [2024-11-27 20:15:45,551 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4032258064516129 [2024-11-27 20:15:45,551 INFO L175 Difference]: Start difference. First operand has 193 places, 664 transitions, 10893 flow. Second operand 16 states and 200 transitions. [2024-11-27 20:15:45,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 1010 transitions, 17436 flow [2024-11-27 20:15:47,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 1010 transitions, 17333 flow, removed 49 selfloop flow, removed 2 redundant places. [2024-11-27 20:15:47,779 INFO L231 Difference]: Finished difference. Result has 212 places, 826 transitions, 13714 flow [2024-11-27 20:15:47,780 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=10808, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=13714, PETRI_PLACES=212, PETRI_TRANSITIONS=826} [2024-11-27 20:15:47,780 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 179 predicate places. [2024-11-27 20:15:47,780 INFO L471 AbstractCegarLoop]: Abstraction has has 212 places, 826 transitions, 13714 flow [2024-11-27 20:15:47,780 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 6.3) internal successors, (126), 20 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:15:47,780 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:15:47,781 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] [2024-11-27 20:15:47,788 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-27 20:15:47,981 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-27 20:15:47,981 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)] === [2024-11-27 20:15:47,982 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:15:47,982 INFO L85 PathProgramCache]: Analyzing trace with hash 456715202, now seen corresponding path program 2 times [2024-11-27 20:15:47,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:15:47,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181122183] [2024-11-27 20:15:47,982 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:15:47,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:15:48,006 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:15:48,007 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:15:48,407 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:15:48,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:15:48,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181122183] [2024-11-27 20:15:48,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181122183] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:15:48,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614689162] [2024-11-27 20:15:48,408 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:15:48,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:15:48,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:15:48,411 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:15:48,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-27 20:15:48,531 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:15:48,531 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:15:48,533 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-27 20:15:48,535 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:15:48,675 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-27 20:15:48,712 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:15:48,712 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:15:48,774 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 20:15:48,775 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 23 treesize of output 16 [2024-11-27 20:15:48,851 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:15:48,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614689162] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:15:48,851 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:15:48,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 6] total 14 [2024-11-27 20:15:48,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926634435] [2024-11-27 20:15:48,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:15:48,852 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-27 20:15:48,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:15:48,853 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-27 20:15:48,853 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2024-11-27 20:15:48,856 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-27 20:15:48,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 826 transitions, 13714 flow. Second operand has 15 states, 15 states have (on average 6.666666666666667) internal successors, (100), 15 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:15:48,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:15:48,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-27 20:15:48,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:15:54,648 INFO L124 PetriNetUnfolderBase]: 10986/15702 cut-off events. [2024-11-27 20:15:54,648 INFO L125 PetriNetUnfolderBase]: For 184464/184464 co-relation queries the response was YES. [2024-11-27 20:15:54,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110794 conditions, 15702 events. 10986/15702 cut-off events. For 184464/184464 co-relation queries the response was YES. Maximal size of possible extension queue 686. Compared 88672 event pairs, 1054 based on Foata normal form. 2/15704 useless extension candidates. Maximal degree in co-relation 110340. Up to 12505 conditions per place. [2024-11-27 20:15:54,820 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 841 selfloop transitions, 317 changer transitions 1/1160 dead transitions. [2024-11-27 20:15:54,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 1160 transitions, 21122 flow [2024-11-27 20:15:54,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-27 20:15:54,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-27 20:15:54,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 180 transitions. [2024-11-27 20:15:54,822 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4838709677419355 [2024-11-27 20:15:54,822 INFO L175 Difference]: Start difference. First operand has 212 places, 826 transitions, 13714 flow. Second operand 12 states and 180 transitions. [2024-11-27 20:15:54,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 1160 transitions, 21122 flow [2024-11-27 20:15:57,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 1160 transitions, 20943 flow, removed 87 selfloop flow, removed 2 redundant places. [2024-11-27 20:15:57,645 INFO L231 Difference]: Finished difference. Result has 225 places, 938 transitions, 16278 flow [2024-11-27 20:15:57,646 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=13541, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=826, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=556, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=16278, PETRI_PLACES=225, PETRI_TRANSITIONS=938} [2024-11-27 20:15:57,646 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 192 predicate places. [2024-11-27 20:15:57,647 INFO L471 AbstractCegarLoop]: Abstraction has has 225 places, 938 transitions, 16278 flow [2024-11-27 20:15:57,647 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.666666666666667) internal successors, (100), 15 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:15:57,647 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:15:57,647 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] [2024-11-27 20:15:57,659 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-27 20:15:57,847 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-27 20:15:57,848 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)] === [2024-11-27 20:15:57,848 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:15:57,848 INFO L85 PathProgramCache]: Analyzing trace with hash -429083078, now seen corresponding path program 3 times [2024-11-27 20:15:57,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:15:57,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487549546] [2024-11-27 20:15:57,849 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 20:15:57,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:15:57,891 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-27 20:15:57,891 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:15:58,383 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:15:58,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:15:58,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487549546] [2024-11-27 20:15:58,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487549546] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:15:58,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149945221] [2024-11-27 20:15:58,384 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 20:15:58,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:15:58,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:15:58,387 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:15:58,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-27 20:15:58,517 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-27 20:15:58,518 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:15:58,520 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-27 20:15:58,522 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:15:58,712 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-27 20:15:58,731 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:15:58,731 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:15:58,819 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 20:15:58,819 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 23 treesize of output 16 [2024-11-27 20:15:58,897 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:15:58,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149945221] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:15:58,897 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:15:58,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 6] total 15 [2024-11-27 20:15:58,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071343721] [2024-11-27 20:15:58,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:15:58,898 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-27 20:15:58,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:15:58,899 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-27 20:15:58,899 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-11-27 20:15:58,916 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-27 20:15:58,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 938 transitions, 16278 flow. Second operand has 16 states, 16 states have (on average 6.5625) internal successors, (105), 16 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) [2024-11-27 20:15:58,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:15:58,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-27 20:15:58,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:16:05,042 INFO L124 PetriNetUnfolderBase]: 11760/16806 cut-off events. [2024-11-27 20:16:05,042 INFO L125 PetriNetUnfolderBase]: For 216764/216764 co-relation queries the response was YES. [2024-11-27 20:16:05,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123115 conditions, 16806 events. 11760/16806 cut-off events. For 216764/216764 co-relation queries the response was YES. Maximal size of possible extension queue 734. Compared 95908 event pairs, 1235 based on Foata normal form. 2/16808 useless extension candidates. Maximal degree in co-relation 122713. Up to 14640 conditions per place. [2024-11-27 20:16:05,258 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 879 selfloop transitions, 265 changer transitions 1/1146 dead transitions. [2024-11-27 20:16:05,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 1146 transitions, 21646 flow [2024-11-27 20:16:05,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-27 20:16:05,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-27 20:16:05,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 190 transitions. [2024-11-27 20:16:05,259 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47146401985111663 [2024-11-27 20:16:05,259 INFO L175 Difference]: Start difference. First operand has 225 places, 938 transitions, 16278 flow. Second operand 13 states and 190 transitions. [2024-11-27 20:16:05,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 1146 transitions, 21646 flow [2024-11-27 20:16:08,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 1146 transitions, 21234 flow, removed 81 selfloop flow, removed 4 redundant places. [2024-11-27 20:16:08,605 INFO L231 Difference]: Finished difference. Result has 236 places, 967 transitions, 17008 flow [2024-11-27 20:16:08,606 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=15866, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=938, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=684, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=17008, PETRI_PLACES=236, PETRI_TRANSITIONS=967} [2024-11-27 20:16:08,606 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 203 predicate places. [2024-11-27 20:16:08,606 INFO L471 AbstractCegarLoop]: Abstraction has has 236 places, 967 transitions, 17008 flow [2024-11-27 20:16:08,607 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.5625) internal successors, (105), 16 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) [2024-11-27 20:16:08,607 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:16:08,607 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] [2024-11-27 20:16:08,615 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-27 20:16:08,807 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-27 20:16:08,807 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)] === [2024-11-27 20:16:08,808 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:16:08,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1715664764, now seen corresponding path program 4 times [2024-11-27 20:16:08,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:16:08,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888115284] [2024-11-27 20:16:08,808 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 20:16:08,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:16:08,834 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 20:16:08,834 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:16:09,528 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:16:09,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:16:09,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888115284] [2024-11-27 20:16:09,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888115284] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:16:09,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334233311] [2024-11-27 20:16:09,529 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 20:16:09,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:16:09,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:16:09,532 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:16:09,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-27 20:16:09,663 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 20:16:09,664 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:16:09,666 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-27 20:16:09,669 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:16:09,713 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-27 20:16:10,088 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-27 20:16:10,103 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:16:10,103 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:16:10,502 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:16:10,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334233311] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:16:10,502 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:16:10,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 25 [2024-11-27 20:16:10,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97076478] [2024-11-27 20:16:10,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:16:10,503 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-27 20:16:10,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:16:10,504 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-27 20:16:10,504 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2024-11-27 20:16:10,509 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-27 20:16:10,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 967 transitions, 17008 flow. Second operand has 26 states, 26 states have (on average 6.1923076923076925) internal successors, (161), 26 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:16:10,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:16:10,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-27 20:16:10,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:16:19,612 INFO L124 PetriNetUnfolderBase]: 13014/18588 cut-off events. [2024-11-27 20:16:19,612 INFO L125 PetriNetUnfolderBase]: For 255944/255944 co-relation queries the response was YES. [2024-11-27 20:16:19,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139702 conditions, 18588 events. 13014/18588 cut-off events. For 255944/255944 co-relation queries the response was YES. Maximal size of possible extension queue 815. Compared 107695 event pairs, 1053 based on Foata normal form. 2/18590 useless extension candidates. Maximal degree in co-relation 139293. Up to 14523 conditions per place. [2024-11-27 20:16:19,875 INFO L140 encePairwiseOnDemand]: 15/31 looper letters, 908 selfloop transitions, 510 changer transitions 1/1420 dead transitions. [2024-11-27 20:16:19,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 1420 transitions, 27060 flow [2024-11-27 20:16:19,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-27 20:16:19,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2024-11-27 20:16:19,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 385 transitions. [2024-11-27 20:16:19,878 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3449820788530466 [2024-11-27 20:16:19,878 INFO L175 Difference]: Start difference. First operand has 236 places, 967 transitions, 17008 flow. Second operand 36 states and 385 transitions. [2024-11-27 20:16:19,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 1420 transitions, 27060 flow [2024-11-27 20:16:24,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 1420 transitions, 26586 flow, removed 100 selfloop flow, removed 5 redundant places. [2024-11-27 20:16:24,053 INFO L231 Difference]: Finished difference. Result has 282 places, 1164 transitions, 21469 flow [2024-11-27 20:16:24,054 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=16643, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=967, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=332, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=588, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=21469, PETRI_PLACES=282, PETRI_TRANSITIONS=1164} [2024-11-27 20:16:24,054 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 249 predicate places. [2024-11-27 20:16:24,055 INFO L471 AbstractCegarLoop]: Abstraction has has 282 places, 1164 transitions, 21469 flow [2024-11-27 20:16:24,055 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.1923076923076925) internal successors, (161), 26 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:16:24,055 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:16:24,055 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] [2024-11-27 20:16:24,062 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-27 20:16:24,255 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-27 20:16:24,256 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)] === [2024-11-27 20:16:24,256 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:16:24,256 INFO L85 PathProgramCache]: Analyzing trace with hash 102098030, now seen corresponding path program 5 times [2024-11-27 20:16:24,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:16:24,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919700167] [2024-11-27 20:16:24,257 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 20:16:24,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:16:24,285 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-27 20:16:24,285 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:16:24,693 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:16:24,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:16:24,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919700167] [2024-11-27 20:16:24,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919700167] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:16:24,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090774240] [2024-11-27 20:16:24,693 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 20:16:24,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:16:24,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:16:24,696 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:16:24,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-27 20:16:24,820 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-27 20:16:24,821 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:16:24,823 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-27 20:16:24,826 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:16:24,884 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-27 20:16:25,251 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-27 20:16:25,270 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:16:25,271 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:16:25,781 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2024-11-27 20:16:25,797 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 20:16:25,798 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 70 treesize of output 62 [2024-11-27 20:16:25,946 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:16:25,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090774240] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:16:25,947 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:16:25,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2024-11-27 20:16:25,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198826711] [2024-11-27 20:16:25,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:16:25,948 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-27 20:16:25,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:16:25,949 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-27 20:16:25,949 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2024-11-27 20:16:25,978 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-27 20:16:25,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 1164 transitions, 21469 flow. Second operand has 22 states, 22 states have (on average 6.409090909090909) internal successors, (141), 22 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:16:25,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:16:25,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-27 20:16:25,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:16:35,710 INFO L124 PetriNetUnfolderBase]: 15275/21808 cut-off events. [2024-11-27 20:16:35,710 INFO L125 PetriNetUnfolderBase]: For 344712/344712 co-relation queries the response was YES. [2024-11-27 20:16:36,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175556 conditions, 21808 events. 15275/21808 cut-off events. For 344712/344712 co-relation queries the response was YES. Maximal size of possible extension queue 975. Compared 129305 event pairs, 1684 based on Foata normal form. 2/21810 useless extension candidates. Maximal degree in co-relation 175105. Up to 18327 conditions per place. [2024-11-27 20:16:36,098 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 1285 selfloop transitions, 315 changer transitions 1/1602 dead transitions. [2024-11-27 20:16:36,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 1602 transitions, 32464 flow [2024-11-27 20:16:36,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-27 20:16:36,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-27 20:16:36,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 174 transitions. [2024-11-27 20:16:36,100 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46774193548387094 [2024-11-27 20:16:36,100 INFO L175 Difference]: Start difference. First operand has 282 places, 1164 transitions, 21469 flow. Second operand 12 states and 174 transitions. [2024-11-27 20:16:36,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 1602 transitions, 32464 flow [2024-11-27 20:16:42,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 1602 transitions, 31093 flow, removed 420 selfloop flow, removed 9 redundant places. [2024-11-27 20:16:42,817 INFO L231 Difference]: Finished difference. Result has 289 places, 1288 transitions, 23921 flow [2024-11-27 20:16:42,818 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=20520, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=880, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=23921, PETRI_PLACES=289, PETRI_TRANSITIONS=1288} [2024-11-27 20:16:42,818 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 256 predicate places. [2024-11-27 20:16:42,818 INFO L471 AbstractCegarLoop]: Abstraction has has 289 places, 1288 transitions, 23921 flow [2024-11-27 20:16:42,818 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 6.409090909090909) internal successors, (141), 22 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:16:42,818 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:16:42,818 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] [2024-11-27 20:16:42,825 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-27 20:16:43,019 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:16:43,019 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)] === [2024-11-27 20:16:43,020 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:16:43,020 INFO L85 PathProgramCache]: Analyzing trace with hash 2019493354, now seen corresponding path program 6 times [2024-11-27 20:16:43,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:16:43,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396857158] [2024-11-27 20:16:43,020 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 20:16:43,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:16:43,046 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-27 20:16:43,046 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:16:43,728 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:16:43,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:16:43,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396857158] [2024-11-27 20:16:43,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396857158] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:16:43,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547611140] [2024-11-27 20:16:43,729 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 20:16:43,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:16:43,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:16:43,732 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:16:43,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-27 20:16:43,863 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-27 20:16:43,864 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:16:43,866 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-27 20:16:43,867 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:16:43,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-27 20:16:44,226 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-27 20:16:44,242 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:16:44,242 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:16:44,655 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:16:44,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547611140] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:16:44,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:16:44,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 9] total 26 [2024-11-27 20:16:44,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560038918] [2024-11-27 20:16:44,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:16:44,656 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-27 20:16:44,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:16:44,657 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-27 20:16:44,658 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2024-11-27 20:16:44,662 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-27 20:16:44,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 1288 transitions, 23921 flow. Second operand has 27 states, 27 states have (on average 6.111111111111111) internal successors, (165), 27 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:16:44,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:16:44,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-27 20:16:44,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:17:03,141 INFO L124 PetriNetUnfolderBase]: 21477/30808 cut-off events. [2024-11-27 20:17:03,141 INFO L125 PetriNetUnfolderBase]: For 504530/504530 co-relation queries the response was YES. [2024-11-27 20:17:03,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 249414 conditions, 30808 events. 21477/30808 cut-off events. For 504530/504530 co-relation queries the response was YES. Maximal size of possible extension queue 1419. Compared 193288 event pairs, 1575 based on Foata normal form. 4/30812 useless extension candidates. Maximal degree in co-relation 248928. Up to 19773 conditions per place. [2024-11-27 20:17:03,721 INFO L140 encePairwiseOnDemand]: 13/31 looper letters, 1233 selfloop transitions, 1402 changer transitions 2/2638 dead transitions. [2024-11-27 20:17:03,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 2638 transitions, 49870 flow [2024-11-27 20:17:03,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2024-11-27 20:17:03,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2024-11-27 20:17:03,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 1058 transitions. [2024-11-27 20:17:03,727 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3379112104758863 [2024-11-27 20:17:03,727 INFO L175 Difference]: Start difference. First operand has 289 places, 1288 transitions, 23921 flow. Second operand 101 states and 1058 transitions. [2024-11-27 20:17:03,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 2638 transitions, 49870 flow [2024-11-27 20:17:16,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 2638 transitions, 49153 flow, removed 282 selfloop flow, removed 4 redundant places. [2024-11-27 20:17:16,603 INFO L231 Difference]: Finished difference. Result has 411 places, 2198 transitions, 43052 flow [2024-11-27 20:17:16,604 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=23512, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=596, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=541, PETRI_DIFFERENCE_SUBTRAHEND_STATES=101, PETRI_FLOW=43052, PETRI_PLACES=411, PETRI_TRANSITIONS=2198} [2024-11-27 20:17:16,604 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 378 predicate places. [2024-11-27 20:17:16,604 INFO L471 AbstractCegarLoop]: Abstraction has has 411 places, 2198 transitions, 43052 flow [2024-11-27 20:17:16,605 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 6.111111111111111) internal successors, (165), 27 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:17:16,605 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:17:16,605 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] [2024-11-27 20:17:16,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-27 20:17:16,805 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:17:16,806 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)] === [2024-11-27 20:17:16,806 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:17:16,807 INFO L85 PathProgramCache]: Analyzing trace with hash -148486474, now seen corresponding path program 7 times [2024-11-27 20:17:16,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:17:16,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781035522] [2024-11-27 20:17:16,807 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 20:17:16,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:17:16,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:17:17,464 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:17:17,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:17:17,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781035522] [2024-11-27 20:17:17,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781035522] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:17:17,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247984776] [2024-11-27 20:17:17,464 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 20:17:17,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:17:17,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:17:17,469 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:17:17,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7863aa7-48b5-47b5-9092-6c83f7b6d08b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-27 20:17:17,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:17:17,577 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-27 20:17:17,579 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:17:17,618 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-27 20:17:17,904 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-27 20:17:17,926 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:17:17,926 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:17:18,323 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2024-11-27 20:17:18,338 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 20:17:18,338 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 70 treesize of output 62 [2024-11-27 20:17:18,510 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:17:18,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247984776] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:17:18,511 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:17:18,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2024-11-27 20:17:18,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489544591] [2024-11-27 20:17:18,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:17:18,512 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-27 20:17:18,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:17:18,513 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-27 20:17:18,513 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2024-11-27 20:17:18,517 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-27 20:17:18,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 2198 transitions, 43052 flow. Second operand has 22 states, 22 states have (on average 6.318181818181818) internal successors, (139), 22 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:17:18,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:17:18,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-27 20:17:18,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand