./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread/stack_longest-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf323b6-6a52-4c4c-bfed-d51f9e0f52e4/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf323b6-6a52-4c4c-bfed-d51f9e0f52e4/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_8bf323b6-6a52-4c4c-bfed-d51f9e0f52e4/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf323b6-6a52-4c4c-bfed-d51f9e0f52e4/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread/stack_longest-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf323b6-6a52-4c4c-bfed-d51f9e0f52e4/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf323b6-6a52-4c4c-bfed-d51f9e0f52e4/bin/uautomizer-verify-aQ6SnzHsRB --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5773bc320dd9dee5d943610df8c4ec3040864edddf388dd42a51d37167245e47 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-27 20:30:23,011 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-27 20:30:23,121 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf323b6-6a52-4c4c-bfed-d51f9e0f52e4/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-27 20:30:23,133 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-27 20:30:23,133 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-27 20:30:23,160 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-27 20:30:23,161 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-27 20:30:23,161 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-27 20:30:23,162 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-27 20:30:23,162 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-27 20:30:23,162 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-27 20:30:23,162 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-27 20:30:23,162 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-27 20:30:23,163 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-27 20:30:23,163 INFO L153 SettingsManager]: * Use SBE=true [2024-11-27 20:30:23,163 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-27 20:30:23,163 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-27 20:30:23,163 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-27 20:30:23,163 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-27 20:30:23,163 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-27 20:30:23,164 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-27 20:30:23,164 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-27 20:30:23,164 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-27 20:30:23,164 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-27 20:30:23,164 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-27 20:30:23,164 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-27 20:30:23,164 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-27 20:30:23,164 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-27 20:30:23,164 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-27 20:30:23,165 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-27 20:30:23,165 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 20:30:23,165 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 20:30:23,165 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 20:30:23,165 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:30:23,165 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-27 20:30:23,165 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 20:30:23,165 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 20:30:23,165 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 20:30:23,165 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:30:23,166 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-27 20:30:23,166 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-27 20:30:23,166 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-27 20:30:23,166 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-27 20:30:23,166 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-27 20:30:23,166 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-27 20:30:23,166 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-27 20:30:23,166 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-27 20:30:23,166 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_8bf323b6-6a52-4c4c-bfed-d51f9e0f52e4/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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) 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 -> 5773bc320dd9dee5d943610df8c4ec3040864edddf388dd42a51d37167245e47 [2024-11-27 20:30:23,456 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-27 20:30:23,473 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-27 20:30:23,476 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-27 20:30:23,480 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-27 20:30:23,480 INFO L274 PluginConnector]: CDTParser initialized [2024-11-27 20:30:23,482 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf323b6-6a52-4c4c-bfed-d51f9e0f52e4/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/pthread/stack_longest-2.i [2024-11-27 20:30:26,456 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf323b6-6a52-4c4c-bfed-d51f9e0f52e4/bin/uautomizer-verify-aQ6SnzHsRB/data/1af4d2d20/9d04496af2294b8ba7840b43dce1bc7f/FLAGb4f832067 [2024-11-27 20:30:26,851 INFO L384 CDTParser]: Found 1 translation units. [2024-11-27 20:30:26,852 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf323b6-6a52-4c4c-bfed-d51f9e0f52e4/sv-benchmarks/c/pthread/stack_longest-2.i [2024-11-27 20:30:26,871 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf323b6-6a52-4c4c-bfed-d51f9e0f52e4/bin/uautomizer-verify-aQ6SnzHsRB/data/1af4d2d20/9d04496af2294b8ba7840b43dce1bc7f/FLAGb4f832067 [2024-11-27 20:30:26,891 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf323b6-6a52-4c4c-bfed-d51f9e0f52e4/bin/uautomizer-verify-aQ6SnzHsRB/data/1af4d2d20/9d04496af2294b8ba7840b43dce1bc7f [2024-11-27 20:30:26,893 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-27 20:30:26,895 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-27 20:30:26,896 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-27 20:30:26,896 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-27 20:30:26,902 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-27 20:30:26,903 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 08:30:26" (1/1) ... [2024-11-27 20:30:26,904 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2facc0f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:30:26, skipping insertion in model container [2024-11-27 20:30:26,904 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 08:30:26" (1/1) ... [2024-11-27 20:30:26,952 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-27 20:30:27,468 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 20:30:27,511 INFO L200 MainTranslator]: Completed pre-run [2024-11-27 20:30:27,592 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 20:30:27,729 INFO L204 MainTranslator]: Completed translation [2024-11-27 20:30:27,730 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:30:27 WrapperNode [2024-11-27 20:30:27,730 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-27 20:30:27,731 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-27 20:30:27,732 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-27 20:30:27,732 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-27 20:30:27,739 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:30:27" (1/1) ... [2024-11-27 20:30:27,770 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:30:27" (1/1) ... [2024-11-27 20:30:27,876 INFO L138 Inliner]: procedures = 277, calls = 831, calls flagged for inlining = 12, calls inlined = 13, statements flattened = 947 [2024-11-27 20:30:27,876 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-27 20:30:27,877 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-27 20:30:27,877 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-27 20:30:27,877 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-27 20:30:27,889 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:30:27" (1/1) ... [2024-11-27 20:30:27,889 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:30:27" (1/1) ... [2024-11-27 20:30:27,909 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:30:27" (1/1) ... [2024-11-27 20:30:27,963 INFO L175 MemorySlicer]: Split 809 memory accesses to 3 slices as follows [2, 802, 5]. 99 percent of accesses are in the largest equivalence class. The 807 initializations are split as follows [2, 800, 5]. The 1 writes are split as follows [0, 1, 0]. [2024-11-27 20:30:27,964 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:30:27" (1/1) ... [2024-11-27 20:30:27,964 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:30:27" (1/1) ... [2024-11-27 20:30:28,004 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:30:27" (1/1) ... [2024-11-27 20:30:28,008 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:30:27" (1/1) ... [2024-11-27 20:30:28,016 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:30:27" (1/1) ... [2024-11-27 20:30:28,024 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:30:27" (1/1) ... [2024-11-27 20:30:28,027 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:30:27" (1/1) ... [2024-11-27 20:30:28,033 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-27 20:30:28,034 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-27 20:30:28,034 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-27 20:30:28,034 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-27 20:30:28,035 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:30:27" (1/1) ... [2024-11-27 20:30:28,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:30:28,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf323b6-6a52-4c4c-bfed-d51f9e0f52e4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:30:28,115 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf323b6-6a52-4c4c-bfed-d51f9e0f52e4/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-27 20:30:28,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf323b6-6a52-4c4c-bfed-d51f9e0f52e4/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-27 20:30:28,148 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-11-27 20:30:28,148 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-11-27 20:30:28,149 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-11-27 20:30:28,149 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-11-27 20:30:28,149 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-27 20:30:28,149 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-27 20:30:28,149 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-27 20:30:28,150 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-27 20:30:28,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-27 20:30:28,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-27 20:30:28,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-27 20:30:28,150 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-27 20:30:28,150 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-27 20:30:28,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-27 20:30:28,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-27 20:30:28,151 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-27 20:30:28,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-27 20:30:28,152 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-27 20:30:28,153 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 20:30:28,364 INFO L234 CfgBuilder]: Building ICFG [2024-11-27 20:30:28,366 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-27 20:30:30,149 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-27 20:30:30,150 INFO L283 CfgBuilder]: Performing block encoding [2024-11-27 20:30:43,734 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-27 20:30:43,734 INFO L312 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-27 20:30:43,735 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 08:30:43 BoogieIcfgContainer [2024-11-27 20:30:43,735 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-27 20:30:43,741 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-27 20:30:43,741 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-27 20:30:43,751 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-27 20:30:43,752 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 08:30:26" (1/3) ... [2024-11-27 20:30:43,753 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dc41cbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 08:30:43, skipping insertion in model container [2024-11-27 20:30:43,753 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:30:27" (2/3) ... [2024-11-27 20:30:43,754 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dc41cbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 08:30:43, skipping insertion in model container [2024-11-27 20:30:43,755 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 08:30:43" (3/3) ... [2024-11-27 20:30:43,756 INFO L128 eAbstractionObserver]: Analyzing ICFG stack_longest-2.i [2024-11-27 20:30:43,776 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-27 20:30:43,781 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG stack_longest-2.i that has 3 procedures, 46 locations, 1 initial locations, 2 loop locations, and 7 error locations. [2024-11-27 20:30:43,781 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-27 20:30:43,894 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-27 20:30:43,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 54 transitions, 122 flow [2024-11-27 20:30:44,044 INFO L124 PetriNetUnfolderBase]: 9/52 cut-off events. [2024-11-27 20:30:44,046 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-27 20:30:44,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 52 events. 9/52 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 124 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 47. Up to 3 conditions per place. [2024-11-27 20:30:44,053 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 54 transitions, 122 flow [2024-11-27 20:30:44,062 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 49 places, 51 transitions, 114 flow [2024-11-27 20:30:44,071 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-27 20:30:44,088 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=None, 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;@1b821c8c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-27 20:30:44,089 INFO L334 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2024-11-27 20:30:44,150 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-27 20:30:44,150 INFO L124 PetriNetUnfolderBase]: 1/18 cut-off events. [2024-11-27 20:30:44,151 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-27 20:30:44,151 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:30:44,152 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:30:44,152 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-11-27 20:30:44,158 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:30:44,158 INFO L85 PathProgramCache]: Analyzing trace with hash -463131817, now seen corresponding path program 1 times [2024-11-27 20:30:44,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:30:44,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653274245] [2024-11-27 20:30:44,168 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:30:44,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:30:44,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:30:45,422 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 20:30:45,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:30:45,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653274245] [2024-11-27 20:30:45,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653274245] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:30:45,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:30:45,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 20:30:45,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773720109] [2024-11-27 20:30:45,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:30:45,438 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 20:30:45,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:30:45,475 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 20:30:45,476 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 20:30:45,498 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-11-27 20:30:45,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 51 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:30:45,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:30:45,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-11-27 20:30:45,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:30:45,982 INFO L124 PetriNetUnfolderBase]: 459/866 cut-off events. [2024-11-27 20:30:45,983 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2024-11-27 20:30:45,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1638 conditions, 866 events. 459/866 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4370 event pairs, 245 based on Foata normal form. 94/832 useless extension candidates. Maximal degree in co-relation 1560. Up to 520 conditions per place. [2024-11-27 20:30:46,001 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 43 selfloop transitions, 3 changer transitions 0/59 dead transitions. [2024-11-27 20:30:46,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 59 transitions, 225 flow [2024-11-27 20:30:46,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 20:30:46,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-27 20:30:46,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 113 transitions. [2024-11-27 20:30:46,019 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5231481481481481 [2024-11-27 20:30:46,021 INFO L175 Difference]: Start difference. First operand has 49 places, 51 transitions, 114 flow. Second operand 4 states and 113 transitions. [2024-11-27 20:30:46,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 59 transitions, 225 flow [2024-11-27 20:30:46,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 59 transitions, 215 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-27 20:30:46,031 INFO L231 Difference]: Finished difference. Result has 45 places, 44 transitions, 98 flow [2024-11-27 20:30:46,033 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=98, PETRI_PLACES=45, PETRI_TRANSITIONS=44} [2024-11-27 20:30:46,037 INFO L279 CegarLoopForPetriNet]: 49 programPoint places, -4 predicate places. [2024-11-27 20:30:46,038 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 44 transitions, 98 flow [2024-11-27 20:30:46,038 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:30:46,038 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:30:46,038 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:30:46,038 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-27 20:30:46,039 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-11-27 20:30:46,039 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:30:46,039 INFO L85 PathProgramCache]: Analyzing trace with hash -463131816, now seen corresponding path program 1 times [2024-11-27 20:30:46,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:30:46,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540823962] [2024-11-27 20:30:46,040 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:30:46,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:30:46,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:30:47,483 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 20:30:47,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:30:47,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540823962] [2024-11-27 20:30:47,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540823962] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:30:47,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:30:47,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 20:30:47,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851236843] [2024-11-27 20:30:47,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:30:47,486 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:30:47,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:30:47,487 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:30:47,487 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-27 20:30:47,517 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-11-27 20:30:47,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 44 transitions, 98 flow. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:30:47,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:30:47,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-11-27 20:30:47,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:30:48,037 INFO L124 PetriNetUnfolderBase]: 574/1064 cut-off events. [2024-11-27 20:30:48,037 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2024-11-27 20:30:48,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2075 conditions, 1064 events. 574/1064 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 5043 event pairs, 179 based on Foata normal form. 9/926 useless extension candidates. Maximal degree in co-relation 695. Up to 755 conditions per place. [2024-11-27 20:30:48,050 INFO L140 encePairwiseOnDemand]: 47/54 looper letters, 59 selfloop transitions, 4 changer transitions 0/75 dead transitions. [2024-11-27 20:30:48,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 75 transitions, 293 flow [2024-11-27 20:30:48,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:30:48,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 20:30:48,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2024-11-27 20:30:48,052 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5296296296296297 [2024-11-27 20:30:48,053 INFO L175 Difference]: Start difference. First operand has 45 places, 44 transitions, 98 flow. Second operand 5 states and 143 transitions. [2024-11-27 20:30:48,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 75 transitions, 293 flow [2024-11-27 20:30:48,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 75 transitions, 285 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-27 20:30:48,058 INFO L231 Difference]: Finished difference. Result has 49 places, 47 transitions, 128 flow [2024-11-27 20:30:48,058 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=128, PETRI_PLACES=49, PETRI_TRANSITIONS=47} [2024-11-27 20:30:48,059 INFO L279 CegarLoopForPetriNet]: 49 programPoint places, 0 predicate places. [2024-11-27 20:30:48,059 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 47 transitions, 128 flow [2024-11-27 20:30:48,059 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:30:48,060 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:30:48,060 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:30:48,061 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-27 20:30:48,062 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-11-27 20:30:48,063 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:30:48,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1871469411, now seen corresponding path program 1 times [2024-11-27 20:30:48,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:30:48,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313162566] [2024-11-27 20:30:48,067 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:30:48,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:30:48,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:30:48,446 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 20:30:48,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:30:48,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313162566] [2024-11-27 20:30:48,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313162566] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:30:48,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:30:48,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 20:30:48,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779665404] [2024-11-27 20:30:48,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:30:48,448 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 20:30:48,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:30:48,448 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 20:30:48,449 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 20:30:48,449 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2024-11-27 20:30:48,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 47 transitions, 128 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:30:48,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:30:48,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2024-11-27 20:30:48,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:30:48,957 INFO L124 PetriNetUnfolderBase]: 823/1511 cut-off events. [2024-11-27 20:30:48,957 INFO L125 PetriNetUnfolderBase]: For 263/266 co-relation queries the response was YES. [2024-11-27 20:30:48,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3206 conditions, 1511 events. 823/1511 cut-off events. For 263/266 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 7743 event pairs, 363 based on Foata normal form. 1/1366 useless extension candidates. Maximal degree in co-relation 1126. Up to 857 conditions per place. [2024-11-27 20:30:48,970 INFO L140 encePairwiseOnDemand]: 49/54 looper letters, 68 selfloop transitions, 5 changer transitions 0/86 dead transitions. [2024-11-27 20:30:48,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 86 transitions, 370 flow [2024-11-27 20:30:48,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 20:30:48,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-27 20:30:48,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 135 transitions. [2024-11-27 20:30:48,972 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-11-27 20:30:48,972 INFO L175 Difference]: Start difference. First operand has 49 places, 47 transitions, 128 flow. Second operand 4 states and 135 transitions. [2024-11-27 20:30:48,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 86 transitions, 370 flow [2024-11-27 20:30:48,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 86 transitions, 368 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-27 20:30:48,976 INFO L231 Difference]: Finished difference. Result has 53 places, 50 transitions, 159 flow [2024-11-27 20:30:48,977 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=159, PETRI_PLACES=53, PETRI_TRANSITIONS=50} [2024-11-27 20:30:48,977 INFO L279 CegarLoopForPetriNet]: 49 programPoint places, 4 predicate places. [2024-11-27 20:30:48,978 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 50 transitions, 159 flow [2024-11-27 20:30:48,978 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:30:48,978 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:30:48,978 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:30:48,978 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-27 20:30:48,978 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-11-27 20:30:48,979 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:30:48,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1368831901, now seen corresponding path program 1 times [2024-11-27 20:30:48,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:30:48,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451250596] [2024-11-27 20:30:48,980 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:30:48,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:30:49,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:30:49,305 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 20:30:49,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:30:49,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451250596] [2024-11-27 20:30:49,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451250596] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:30:49,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:30:49,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 20:30:49,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17717469] [2024-11-27 20:30:49,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:30:49,306 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 20:30:49,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:30:49,308 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 20:30:49,308 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 20:30:49,310 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2024-11-27 20:30:49,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 50 transitions, 159 flow. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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 20:30:49,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:30:49,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2024-11-27 20:30:49,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:30:49,696 INFO L124 PetriNetUnfolderBase]: 957/1715 cut-off events. [2024-11-27 20:30:49,696 INFO L125 PetriNetUnfolderBase]: For 546/548 co-relation queries the response was YES. [2024-11-27 20:30:49,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4011 conditions, 1715 events. 957/1715 cut-off events. For 546/548 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 8840 event pairs, 395 based on Foata normal form. 12/1574 useless extension candidates. Maximal degree in co-relation 1267. Up to 1191 conditions per place. [2024-11-27 20:30:49,710 INFO L140 encePairwiseOnDemand]: 51/54 looper letters, 55 selfloop transitions, 2 changer transitions 0/70 dead transitions. [2024-11-27 20:30:49,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 70 transitions, 328 flow [2024-11-27 20:30:49,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 20:30:49,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-27 20:30:49,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 103 transitions. [2024-11-27 20:30:49,713 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6358024691358025 [2024-11-27 20:30:49,713 INFO L175 Difference]: Start difference. First operand has 53 places, 50 transitions, 159 flow. Second operand 3 states and 103 transitions. [2024-11-27 20:30:49,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 70 transitions, 328 flow [2024-11-27 20:30:49,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 70 transitions, 325 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-27 20:30:49,719 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 168 flow [2024-11-27 20:30:49,719 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=55, PETRI_TRANSITIONS=51} [2024-11-27 20:30:49,719 INFO L279 CegarLoopForPetriNet]: 49 programPoint places, 6 predicate places. [2024-11-27 20:30:49,720 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 168 flow [2024-11-27 20:30:49,720 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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 20:30:49,720 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:30:49,720 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:30:49,720 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-27 20:30:49,720 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-11-27 20:30:49,721 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:30:49,721 INFO L85 PathProgramCache]: Analyzing trace with hash -938702165, now seen corresponding path program 1 times [2024-11-27 20:30:49,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:30:49,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122796255] [2024-11-27 20:30:49,722 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:30:49,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:30:49,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:30:50,103 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 20:30:50,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:30:50,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122796255] [2024-11-27 20:30:50,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122796255] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:30:50,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:30:50,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 20:30:50,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601864160] [2024-11-27 20:30:50,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:30:50,104 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 20:30:50,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:30:50,105 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 20:30:50,105 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 20:30:50,105 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2024-11-27 20:30:50,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:30:50,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:30:50,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2024-11-27 20:30:50,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:30:50,438 INFO L124 PetriNetUnfolderBase]: 499/1032 cut-off events. [2024-11-27 20:30:50,439 INFO L125 PetriNetUnfolderBase]: For 251/251 co-relation queries the response was YES. [2024-11-27 20:30:50,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2391 conditions, 1032 events. 499/1032 cut-off events. For 251/251 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 4811 event pairs, 105 based on Foata normal form. 60/1020 useless extension candidates. Maximal degree in co-relation 989. Up to 634 conditions per place. [2024-11-27 20:30:50,446 INFO L140 encePairwiseOnDemand]: 50/54 looper letters, 45 selfloop transitions, 4 changer transitions 0/62 dead transitions. [2024-11-27 20:30:50,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 62 transitions, 300 flow [2024-11-27 20:30:50,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 20:30:50,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-27 20:30:50,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 91 transitions. [2024-11-27 20:30:50,450 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5617283950617284 [2024-11-27 20:30:50,450 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 168 flow. Second operand 3 states and 91 transitions. [2024-11-27 20:30:50,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 62 transitions, 300 flow [2024-11-27 20:30:50,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 62 transitions, 292 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-11-27 20:30:50,458 INFO L231 Difference]: Finished difference. Result has 56 places, 51 transitions, 170 flow [2024-11-27 20:30:50,458 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=170, PETRI_PLACES=56, PETRI_TRANSITIONS=51} [2024-11-27 20:30:50,459 INFO L279 CegarLoopForPetriNet]: 49 programPoint places, 7 predicate places. [2024-11-27 20:30:50,459 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 51 transitions, 170 flow [2024-11-27 20:30:50,460 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:30:50,460 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:30:50,460 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:30:50,460 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-27 20:30:50,460 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-11-27 20:30:50,461 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:30:50,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1194449918, now seen corresponding path program 1 times [2024-11-27 20:30:50,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:30:50,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654143474] [2024-11-27 20:30:50,461 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:30:50,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:30:50,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:30:51,416 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:30:51,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:30:51,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654143474] [2024-11-27 20:30:51,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654143474] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:30:51,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454874426] [2024-11-27 20:30:51,418 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:30:51,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:30:51,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf323b6-6a52-4c4c-bfed-d51f9e0f52e4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:30:51,423 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf323b6-6a52-4c4c-bfed-d51f9e0f52e4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:30:51,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf323b6-6a52-4c4c-bfed-d51f9e0f52e4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-27 20:30:51,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:30:51,907 INFO L256 TraceCheckSpWp]: Trace formula consists of 1756 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-27 20:30:51,913 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:30:52,264 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:30:52,265 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:30:52,499 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:30:52,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454874426] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:30:52,500 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:30:52,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2024-11-27 20:30:52,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722795583] [2024-11-27 20:30:52,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:30:52,501 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-27 20:30:52,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:30:52,505 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-27 20:30:52,505 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2024-11-27 20:30:52,642 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-11-27 20:30:52,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 51 transitions, 170 flow. Second operand has 14 states, 14 states have (on average 17.214285714285715) internal successors, (241), 14 states have internal predecessors, (241), 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 20:30:52,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:30:52,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-11-27 20:30:52,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:30:54,293 INFO L124 PetriNetUnfolderBase]: 1740/3509 cut-off events. [2024-11-27 20:30:54,293 INFO L125 PetriNetUnfolderBase]: For 796/796 co-relation queries the response was YES. [2024-11-27 20:30:54,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8220 conditions, 3509 events. 1740/3509 cut-off events. For 796/796 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 19716 event pairs, 262 based on Foata normal form. 54/3328 useless extension candidates. Maximal degree in co-relation 2561. Up to 699 conditions per place. [2024-11-27 20:30:54,322 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 194 selfloop transitions, 26 changer transitions 0/231 dead transitions. [2024-11-27 20:30:54,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 231 transitions, 1170 flow [2024-11-27 20:30:54,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-27 20:30:54,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-27 20:30:54,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 425 transitions. [2024-11-27 20:30:54,325 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5246913580246914 [2024-11-27 20:30:54,325 INFO L175 Difference]: Start difference. First operand has 56 places, 51 transitions, 170 flow. Second operand 15 states and 425 transitions. [2024-11-27 20:30:54,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 231 transitions, 1170 flow [2024-11-27 20:30:54,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 231 transitions, 1148 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-27 20:30:54,339 INFO L231 Difference]: Finished difference. Result has 81 places, 75 transitions, 417 flow [2024-11-27 20:30:54,339 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=417, PETRI_PLACES=81, PETRI_TRANSITIONS=75} [2024-11-27 20:30:54,341 INFO L279 CegarLoopForPetriNet]: 49 programPoint places, 32 predicate places. [2024-11-27 20:30:54,342 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 75 transitions, 417 flow [2024-11-27 20:30:54,343 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 17.214285714285715) internal successors, (241), 14 states have internal predecessors, (241), 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 20:30:54,343 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:30:54,343 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 20:30:54,357 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf323b6-6a52-4c4c-bfed-d51f9e0f52e4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-27 20:30:54,544 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf323b6-6a52-4c4c-bfed-d51f9e0f52e4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:30:54,544 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-11-27 20:30:54,545 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:30:54,545 INFO L85 PathProgramCache]: Analyzing trace with hash -341251974, now seen corresponding path program 1 times [2024-11-27 20:30:54,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:30:54,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048980882] [2024-11-27 20:30:54,546 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:30:54,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:30:54,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:30:54,956 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 20:30:54,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:30:54,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048980882] [2024-11-27 20:30:54,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048980882] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:30:54,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:30:54,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 20:30:54,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698662882] [2024-11-27 20:30:54,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:30:54,957 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 20:30:54,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:30:54,957 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 20:30:54,957 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 20:30:54,973 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-11-27 20:30:54,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 75 transitions, 417 flow. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 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 20:30:54,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:30:54,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-11-27 20:30:54,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:30:55,720 INFO L124 PetriNetUnfolderBase]: 1695/3429 cut-off events. [2024-11-27 20:30:55,720 INFO L125 PetriNetUnfolderBase]: For 1886/1886 co-relation queries the response was YES. [2024-11-27 20:30:55,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8807 conditions, 3429 events. 1695/3429 cut-off events. For 1886/1886 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 19723 event pairs, 1170 based on Foata normal form. 0/3315 useless extension candidates. Maximal degree in co-relation 7329. Up to 2532 conditions per place. [2024-11-27 20:30:55,756 INFO L140 encePairwiseOnDemand]: 50/54 looper letters, 64 selfloop transitions, 3 changer transitions 0/79 dead transitions. [2024-11-27 20:30:55,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 79 transitions, 566 flow [2024-11-27 20:30:55,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 20:30:55,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-27 20:30:55,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-11-27 20:30:55,757 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-11-27 20:30:55,757 INFO L175 Difference]: Start difference. First operand has 81 places, 75 transitions, 417 flow. Second operand 4 states and 96 transitions. [2024-11-27 20:30:55,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 79 transitions, 566 flow [2024-11-27 20:30:55,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 79 transitions, 556 flow, removed 5 selfloop flow, removed 0 redundant places. [2024-11-27 20:30:55,781 INFO L231 Difference]: Finished difference. Result has 83 places, 74 transitions, 411 flow [2024-11-27 20:30:55,782 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=405, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=411, PETRI_PLACES=83, PETRI_TRANSITIONS=74} [2024-11-27 20:30:55,782 INFO L279 CegarLoopForPetriNet]: 49 programPoint places, 34 predicate places. [2024-11-27 20:30:55,784 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 74 transitions, 411 flow [2024-11-27 20:30:55,784 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 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 20:30:55,785 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:30:55,785 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 20:30:55,785 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-27 20:30:55,785 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-11-27 20:30:55,786 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:30:55,786 INFO L85 PathProgramCache]: Analyzing trace with hash -341251973, now seen corresponding path program 1 times [2024-11-27 20:30:55,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:30:55,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003600177] [2024-11-27 20:30:55,786 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:30:55,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:30:55,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:30:56,677 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 20:30:56,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:30:56,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003600177] [2024-11-27 20:30:56,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003600177] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:30:56,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:30:56,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 20:30:56,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56177036] [2024-11-27 20:30:56,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:30:56,680 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 20:30:56,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:30:56,680 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 20:30:56,680 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-27 20:30:56,721 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-11-27 20:30:56,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 74 transitions, 411 flow. Second operand has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:30:56,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:30:56,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-11-27 20:30:56,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:30:57,663 INFO L124 PetriNetUnfolderBase]: 1847/3723 cut-off events. [2024-11-27 20:30:57,663 INFO L125 PetriNetUnfolderBase]: For 2271/2271 co-relation queries the response was YES. [2024-11-27 20:30:57,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9657 conditions, 3723 events. 1847/3723 cut-off events. For 2271/2271 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 21459 event pairs, 510 based on Foata normal form. 0/3573 useless extension candidates. Maximal degree in co-relation 8154. Up to 2690 conditions per place. [2024-11-27 20:30:57,704 INFO L140 encePairwiseOnDemand]: 48/54 looper letters, 100 selfloop transitions, 7 changer transitions 0/118 dead transitions. [2024-11-27 20:30:57,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 118 transitions, 798 flow [2024-11-27 20:30:57,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 20:30:57,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-27 20:30:57,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 168 transitions. [2024-11-27 20:30:57,706 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5185185185185185 [2024-11-27 20:30:57,706 INFO L175 Difference]: Start difference. First operand has 83 places, 74 transitions, 411 flow. Second operand 6 states and 168 transitions. [2024-11-27 20:30:57,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 118 transitions, 798 flow [2024-11-27 20:30:57,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 118 transitions, 788 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-27 20:30:57,729 INFO L231 Difference]: Finished difference. Result has 88 places, 79 transitions, 472 flow [2024-11-27 20:30:57,730 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=405, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=472, PETRI_PLACES=88, PETRI_TRANSITIONS=79} [2024-11-27 20:30:57,732 INFO L279 CegarLoopForPetriNet]: 49 programPoint places, 39 predicate places. [2024-11-27 20:30:57,733 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 79 transitions, 472 flow [2024-11-27 20:30:57,733 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:30:57,733 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:30:57,733 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 20:30:57,733 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-27 20:30:57,734 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-11-27 20:30:57,734 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:30:57,734 INFO L85 PathProgramCache]: Analyzing trace with hash 135034075, now seen corresponding path program 1 times [2024-11-27 20:30:57,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:30:57,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704101647] [2024-11-27 20:30:57,735 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:30:57,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:30:57,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:30:57,932 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 20:30:57,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:30:57,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704101647] [2024-11-27 20:30:57,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704101647] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:30:57,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:30:57,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 20:30:57,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597370441] [2024-11-27 20:30:57,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:30:57,934 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 20:30:57,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:30:57,934 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 20:30:57,934 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 20:30:57,937 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2024-11-27 20:30:57,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 79 transitions, 472 flow. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:30:57,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:30:57,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2024-11-27 20:30:57,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:30:59,121 INFO L124 PetriNetUnfolderBase]: 2725/5699 cut-off events. [2024-11-27 20:30:59,121 INFO L125 PetriNetUnfolderBase]: For 3977/3977 co-relation queries the response was YES. [2024-11-27 20:30:59,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14602 conditions, 5699 events. 2725/5699 cut-off events. For 3977/3977 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 38040 event pairs, 1359 based on Foata normal form. 137/5634 useless extension candidates. Maximal degree in co-relation 12588. Up to 3244 conditions per place. [2024-11-27 20:30:59,203 INFO L140 encePairwiseOnDemand]: 51/54 looper letters, 122 selfloop transitions, 2 changer transitions 0/136 dead transitions. [2024-11-27 20:30:59,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 136 transitions, 1106 flow [2024-11-27 20:30:59,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 20:30:59,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-27 20:30:59,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 104 transitions. [2024-11-27 20:30:59,204 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6419753086419753 [2024-11-27 20:30:59,205 INFO L175 Difference]: Start difference. First operand has 88 places, 79 transitions, 472 flow. Second operand 3 states and 104 transitions. [2024-11-27 20:30:59,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 136 transitions, 1106 flow [2024-11-27 20:30:59,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 136 transitions, 1094 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-11-27 20:30:59,237 INFO L231 Difference]: Finished difference. Result has 89 places, 80 transitions, 477 flow [2024-11-27 20:30:59,238 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=465, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=477, PETRI_PLACES=89, PETRI_TRANSITIONS=80} [2024-11-27 20:30:59,238 INFO L279 CegarLoopForPetriNet]: 49 programPoint places, 40 predicate places. [2024-11-27 20:30:59,238 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 80 transitions, 477 flow [2024-11-27 20:30:59,239 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:30:59,239 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:30:59,239 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 20:30:59,239 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-27 20:30:59,239 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-11-27 20:30:59,239 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:30:59,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1537609671, now seen corresponding path program 1 times [2024-11-27 20:30:59,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:30:59,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189325568] [2024-11-27 20:30:59,240 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:30:59,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:30:59,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:31:01,542 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 20:31:01,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:31:01,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189325568] [2024-11-27 20:31:01,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189325568] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:31:01,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:31:01,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-27 20:31:01,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606500470] [2024-11-27 20:31:01,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:31:01,543 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-27 20:31:01,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:31:01,544 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-27 20:31:01,544 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-11-27 20:31:01,650 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2024-11-27 20:31:01,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 80 transitions, 477 flow. Second operand has 10 states, 10 states have (on average 17.9) internal successors, (179), 10 states have internal predecessors, (179), 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 20:31:01,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:31:01,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2024-11-27 20:31:01,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:31:03,425 INFO L124 PetriNetUnfolderBase]: 3462/7028 cut-off events. [2024-11-27 20:31:03,425 INFO L125 PetriNetUnfolderBase]: For 5794/5794 co-relation queries the response was YES. [2024-11-27 20:31:03,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19738 conditions, 7028 events. 3462/7028 cut-off events. For 5794/5794 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 44930 event pairs, 786 based on Foata normal form. 0/6808 useless extension candidates. Maximal degree in co-relation 16163. Up to 3938 conditions per place. [2024-11-27 20:31:03,507 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 165 selfloop transitions, 12 changer transitions 0/189 dead transitions. [2024-11-27 20:31:03,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 189 transitions, 1341 flow [2024-11-27 20:31:03,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-27 20:31:03,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-27 20:31:03,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 319 transitions. [2024-11-27 20:31:03,510 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49228395061728397 [2024-11-27 20:31:03,510 INFO L175 Difference]: Start difference. First operand has 89 places, 80 transitions, 477 flow. Second operand 12 states and 319 transitions. [2024-11-27 20:31:03,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 189 transitions, 1341 flow [2024-11-27 20:31:03,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 189 transitions, 1329 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-27 20:31:03,543 INFO L231 Difference]: Finished difference. Result has 102 places, 83 transitions, 525 flow [2024-11-27 20:31:03,543 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=475, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=525, PETRI_PLACES=102, PETRI_TRANSITIONS=83} [2024-11-27 20:31:03,545 INFO L279 CegarLoopForPetriNet]: 49 programPoint places, 53 predicate places. [2024-11-27 20:31:03,545 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 83 transitions, 525 flow [2024-11-27 20:31:03,546 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.9) internal successors, (179), 10 states have internal predecessors, (179), 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 20:31:03,546 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:31:03,546 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:31:03,546 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-27 20:31:03,546 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-11-27 20:31:03,547 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:31:03,547 INFO L85 PathProgramCache]: Analyzing trace with hash 407738979, now seen corresponding path program 1 times [2024-11-27 20:31:03,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:31:03,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039868154] [2024-11-27 20:31:03,548 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:31:03,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:31:03,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:31:03,747 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 20:31:03,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:31:03,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039868154] [2024-11-27 20:31:03,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039868154] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:31:03,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:31:03,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 20:31:03,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799061987] [2024-11-27 20:31:03,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:31:03,749 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 20:31:03,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:31:03,750 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 20:31:03,750 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-27 20:31:03,757 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2024-11-27 20:31:03,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 83 transitions, 525 flow. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 20:31:03,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:31:03,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2024-11-27 20:31:03,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:31:05,098 INFO L124 PetriNetUnfolderBase]: 4935/10402 cut-off events. [2024-11-27 20:31:05,098 INFO L125 PetriNetUnfolderBase]: For 10312/10312 co-relation queries the response was YES. [2024-11-27 20:31:05,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29184 conditions, 10402 events. 4935/10402 cut-off events. For 10312/10312 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 76350 event pairs, 1723 based on Foata normal form. 307/10394 useless extension candidates. Maximal degree in co-relation 24264. Up to 4409 conditions per place. [2024-11-27 20:31:05,198 INFO L140 encePairwiseOnDemand]: 51/54 looper letters, 189 selfloop transitions, 3 changer transitions 0/204 dead transitions. [2024-11-27 20:31:05,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 204 transitions, 1780 flow [2024-11-27 20:31:05,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 20:31:05,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-27 20:31:05,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 144 transitions. [2024-11-27 20:31:05,200 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-11-27 20:31:05,200 INFO L175 Difference]: Start difference. First operand has 102 places, 83 transitions, 525 flow. Second operand 4 states and 144 transitions. [2024-11-27 20:31:05,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 204 transitions, 1780 flow [2024-11-27 20:31:05,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 204 transitions, 1721 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-11-27 20:31:05,257 INFO L231 Difference]: Finished difference. Result has 99 places, 84 transitions, 519 flow [2024-11-27 20:31:05,257 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=503, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=519, PETRI_PLACES=99, PETRI_TRANSITIONS=84} [2024-11-27 20:31:05,258 INFO L279 CegarLoopForPetriNet]: 49 programPoint places, 50 predicate places. [2024-11-27 20:31:05,258 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 84 transitions, 519 flow [2024-11-27 20:31:05,258 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 20:31:05,258 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:31:05,259 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:31:05,259 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-27 20:31:05,259 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-11-27 20:31:05,259 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:31:05,260 INFO L85 PathProgramCache]: Analyzing trace with hash -744567543, now seen corresponding path program 1 times [2024-11-27 20:31:05,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:31:05,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418494129] [2024-11-27 20:31:05,260 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:31:05,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:31:05,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:31:06,013 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:31:06,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:31:06,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418494129] [2024-11-27 20:31:06,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418494129] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:31:06,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647123436] [2024-11-27 20:31:06,014 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:31:06,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:31:06,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf323b6-6a52-4c4c-bfed-d51f9e0f52e4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:31:06,016 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf323b6-6a52-4c4c-bfed-d51f9e0f52e4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:31:06,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf323b6-6a52-4c4c-bfed-d51f9e0f52e4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-27 20:31:06,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:31:06,430 INFO L256 TraceCheckSpWp]: Trace formula consists of 1829 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-27 20:31:06,433 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:31:06,845 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:31:06,845 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:31:07,176 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:31:07,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647123436] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:31:07,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:31:07,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2024-11-27 20:31:07,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082675089] [2024-11-27 20:31:07,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:31:07,178 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-27 20:31:07,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:31:07,179 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-27 20:31:07,179 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2024-11-27 20:31:07,348 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-11-27 20:31:07,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 84 transitions, 519 flow. Second operand has 17 states, 17 states have (on average 18.41176470588235) internal successors, (313), 17 states have internal predecessors, (313), 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 20:31:07,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:31:07,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-11-27 20:31:07,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:31:11,169 INFO L124 PetriNetUnfolderBase]: 10387/20856 cut-off events. [2024-11-27 20:31:11,169 INFO L125 PetriNetUnfolderBase]: For 25778/25786 co-relation queries the response was YES. [2024-11-27 20:31:11,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62308 conditions, 20856 events. 10387/20856 cut-off events. For 25778/25786 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 160046 event pairs, 1566 based on Foata normal form. 225/20384 useless extension candidates. Maximal degree in co-relation 47591. Up to 3457 conditions per place. [2024-11-27 20:31:11,374 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 333 selfloop transitions, 57 changer transitions 0/400 dead transitions. [2024-11-27 20:31:11,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 400 transitions, 2862 flow [2024-11-27 20:31:11,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-27 20:31:11,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-27 20:31:11,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 590 transitions. [2024-11-27 20:31:11,379 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5462962962962963 [2024-11-27 20:31:11,379 INFO L175 Difference]: Start difference. First operand has 99 places, 84 transitions, 519 flow. Second operand 20 states and 590 transitions. [2024-11-27 20:31:11,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 400 transitions, 2862 flow [2024-11-27 20:31:11,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 400 transitions, 2807 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-11-27 20:31:11,525 INFO L231 Difference]: Finished difference. Result has 128 places, 127 transitions, 1025 flow [2024-11-27 20:31:11,525 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=493, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1025, PETRI_PLACES=128, PETRI_TRANSITIONS=127} [2024-11-27 20:31:11,526 INFO L279 CegarLoopForPetriNet]: 49 programPoint places, 79 predicate places. [2024-11-27 20:31:11,528 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 127 transitions, 1025 flow [2024-11-27 20:31:11,528 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 18.41176470588235) internal successors, (313), 17 states have internal predecessors, (313), 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 20:31:11,529 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:31:11,529 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:31:11,544 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf323b6-6a52-4c4c-bfed-d51f9e0f52e4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-27 20:31:11,733 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf323b6-6a52-4c4c-bfed-d51f9e0f52e4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-27 20:31:11,733 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-11-27 20:31:11,734 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:31:11,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1145685331, now seen corresponding path program 1 times [2024-11-27 20:31:11,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:31:11,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655460768] [2024-11-27 20:31:11,734 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:31:11,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:31:11,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:31:14,077 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:31:14,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:31:14,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655460768] [2024-11-27 20:31:14,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655460768] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:31:14,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108964304] [2024-11-27 20:31:14,078 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:31:14,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:31:14,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf323b6-6a52-4c4c-bfed-d51f9e0f52e4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:31:14,081 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf323b6-6a52-4c4c-bfed-d51f9e0f52e4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:31:14,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf323b6-6a52-4c4c-bfed-d51f9e0f52e4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-27 20:31:14,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:31:14,526 INFO L256 TraceCheckSpWp]: Trace formula consists of 1842 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-27 20:31:14,530 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:31:14,741 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 25 treesize of output 1 [2024-11-27 20:31:14,962 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 80 treesize of output 32 [2024-11-27 20:31:15,108 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:31:15,109 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:31:15,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108964304] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:31:15,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 20:31:15,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 19 [2024-11-27 20:31:15,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797711007] [2024-11-27 20:31:15,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:31:15,111 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-27 20:31:15,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:31:15,112 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-27 20:31:15,113 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2024-11-27 20:31:15,215 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2024-11-27 20:31:15,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 127 transitions, 1025 flow. Second operand has 10 states, 10 states have (on average 18.6) internal successors, (186), 10 states have internal predecessors, (186), 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 20:31:15,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:31:15,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2024-11-27 20:31:15,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand