./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b6359f-5388-478e-a963-1c0f62774917/bin/uautomizer-verify-jihMAELWvX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b6359f-5388-478e-a963-1c0f62774917/bin/uautomizer-verify-jihMAELWvX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b6359f-5388-478e-a963-1c0f62774917/bin/uautomizer-verify-jihMAELWvX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b6359f-5388-478e-a963-1c0f62774917/bin/uautomizer-verify-jihMAELWvX/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b6359f-5388-478e-a963-1c0f62774917/bin/uautomizer-verify-jihMAELWvX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b6359f-5388-478e-a963-1c0f62774917/bin/uautomizer-verify-jihMAELWvX --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 2e9e4bd6e9b16aa5f22ad2335ca34ba741869a12ab5a04a80108cf42ed170c0f --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-08 16:47:05,035 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 16:47:05,109 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b6359f-5388-478e-a963-1c0f62774917/bin/uautomizer-verify-jihMAELWvX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-08 16:47:05,114 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 16:47:05,115 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 16:47:05,157 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 16:47:05,158 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 16:47:05,158 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 16:47:05,161 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 16:47:05,162 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 16:47:05,163 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 16:47:05,163 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 16:47:05,164 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 16:47:05,164 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 16:47:05,165 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 16:47:05,165 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 16:47:05,166 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 16:47:05,166 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 16:47:05,167 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 16:47:05,167 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 16:47:05,168 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-08 16:47:05,169 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-08 16:47:05,169 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-08 16:47:05,169 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 16:47:05,170 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-08 16:47:05,170 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 16:47:05,171 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-08 16:47:05,171 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 16:47:05,171 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 16:47:05,172 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 16:47:05,172 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 16:47:05,173 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 16:47:05,173 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 16:47:05,173 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 16:47:05,174 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 16:47:05,174 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 16:47:05,175 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 16:47:05,175 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 16:47:05,175 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 16:47:05,176 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 16:47:05,176 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 16:47:05,181 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 16:47:05,181 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b6359f-5388-478e-a963-1c0f62774917/bin/uautomizer-verify-jihMAELWvX/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b6359f-5388-478e-a963-1c0f62774917/bin/uautomizer-verify-jihMAELWvX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e9e4bd6e9b16aa5f22ad2335ca34ba741869a12ab5a04a80108cf42ed170c0f [2024-11-08 16:47:05,542 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 16:47:05,576 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 16:47:05,579 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 16:47:05,581 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 16:47:05,581 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 16:47:05,583 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b6359f-5388-478e-a963-1c0f62774917/bin/uautomizer-verify-jihMAELWvX/../../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c Unable to find full path for "g++" [2024-11-08 16:47:07,855 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 16:47:08,059 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 16:47:08,060 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b6359f-5388-478e-a963-1c0f62774917/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c [2024-11-08 16:47:08,074 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b6359f-5388-478e-a963-1c0f62774917/bin/uautomizer-verify-jihMAELWvX/data/1e231d533/de1cfac25108456985b0e1f94bf056c1/FLAG8df1e94b1 [2024-11-08 16:47:08,090 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b6359f-5388-478e-a963-1c0f62774917/bin/uautomizer-verify-jihMAELWvX/data/1e231d533/de1cfac25108456985b0e1f94bf056c1 [2024-11-08 16:47:08,095 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 16:47:08,097 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 16:47:08,098 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 16:47:08,099 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 16:47:08,107 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 16:47:08,108 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 04:47:08" (1/1) ... [2024-11-08 16:47:08,113 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@515adf8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:47:08, skipping insertion in model container [2024-11-08 16:47:08,113 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 04:47:08" (1/1) ... [2024-11-08 16:47:08,146 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 16:47:08,393 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-08 16:47:08,398 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 16:47:08,409 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 16:47:08,450 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 16:47:08,474 INFO L204 MainTranslator]: Completed translation [2024-11-08 16:47:08,474 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:47:08 WrapperNode [2024-11-08 16:47:08,475 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 16:47:08,476 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 16:47:08,477 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 16:47:08,477 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 16:47:08,486 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:47:08" (1/1) ... [2024-11-08 16:47:08,499 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:47:08" (1/1) ... [2024-11-08 16:47:08,561 INFO L138 Inliner]: procedures = 25, calls = 60, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 307 [2024-11-08 16:47:08,562 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 16:47:08,563 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 16:47:08,563 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 16:47:08,563 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 16:47:08,581 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:47:08" (1/1) ... [2024-11-08 16:47:08,586 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:47:08" (1/1) ... [2024-11-08 16:47:08,591 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:47:08" (1/1) ... [2024-11-08 16:47:08,614 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-08 16:47:08,615 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:47:08" (1/1) ... [2024-11-08 16:47:08,615 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:47:08" (1/1) ... [2024-11-08 16:47:08,627 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:47:08" (1/1) ... [2024-11-08 16:47:08,637 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:47:08" (1/1) ... [2024-11-08 16:47:08,644 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:47:08" (1/1) ... [2024-11-08 16:47:08,646 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:47:08" (1/1) ... [2024-11-08 16:47:08,655 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 16:47:08,656 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 16:47:08,658 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 16:47:08,659 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 16:47:08,660 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:47:08" (1/1) ... [2024-11-08 16:47:08,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 16:47:08,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b6359f-5388-478e-a963-1c0f62774917/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:47:08,702 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b6359f-5388-478e-a963-1c0f62774917/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-08 16:47:08,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b6359f-5388-478e-a963-1c0f62774917/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-08 16:47:08,740 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-08 16:47:08,740 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-08 16:47:08,741 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-08 16:47:08,742 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-08 16:47:08,742 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-08 16:47:08,743 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-08 16:47:08,743 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-08 16:47:08,743 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-11-08 16:47:08,743 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-11-08 16:47:08,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-08 16:47:08,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-08 16:47:08,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-08 16:47:08,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-08 16:47:08,744 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-08 16:47:08,744 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-08 16:47:08,744 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-08 16:47:08,744 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 16:47:08,747 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 16:47:08,748 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-08 16:47:08,748 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-08 16:47:08,750 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-08 16:47:08,906 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 16:47:08,908 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 16:47:09,602 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-08 16:47:09,602 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 16:47:10,174 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 16:47:10,175 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-08 16:47:10,176 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 04:47:10 BoogieIcfgContainer [2024-11-08 16:47:10,176 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 16:47:10,180 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 16:47:10,181 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 16:47:10,184 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 16:47:10,185 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 04:47:08" (1/3) ... [2024-11-08 16:47:10,186 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@708f3384 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 04:47:10, skipping insertion in model container [2024-11-08 16:47:10,186 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:47:08" (2/3) ... [2024-11-08 16:47:10,188 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@708f3384 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 04:47:10, skipping insertion in model container [2024-11-08 16:47:10,188 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 04:47:10" (3/3) ... [2024-11-08 16:47:10,190 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-buffer-mult-alt.wvr.c [2024-11-08 16:47:10,213 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 16:47:10,213 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2024-11-08 16:47:10,214 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-08 16:47:10,335 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-08 16:47:10,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 85 places, 84 transitions, 196 flow [2024-11-08 16:47:10,458 INFO L124 PetriNetUnfolderBase]: 12/80 cut-off events. [2024-11-08 16:47:10,459 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-08 16:47:10,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97 conditions, 80 events. 12/80 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 203 event pairs, 0 based on Foata normal form. 0/54 useless extension candidates. Maximal degree in co-relation 64. Up to 2 conditions per place. [2024-11-08 16:47:10,467 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 84 transitions, 196 flow [2024-11-08 16:47:10,475 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 80 places, 79 transitions, 182 flow [2024-11-08 16:47:10,491 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 16:47:10,502 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;@21a4fb36, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 16:47:10,502 INFO L334 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2024-11-08 16:47:10,508 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-08 16:47:10,508 INFO L124 PetriNetUnfolderBase]: 3/10 cut-off events. [2024-11-08 16:47:10,509 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-08 16:47:10,509 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:47:10,510 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-08 16:47:10,510 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-08 16:47:10,516 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:47:10,516 INFO L85 PathProgramCache]: Analyzing trace with hash 27494843, now seen corresponding path program 1 times [2024-11-08 16:47:10,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:47:10,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779719034] [2024-11-08 16:47:10,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:47:10,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:47:10,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:47:10,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:47:10,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:47:10,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779719034] [2024-11-08 16:47:10,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779719034] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:47:10,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:47:10,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-08 16:47:10,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174494930] [2024-11-08 16:47:10,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:47:10,985 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 16:47:10,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:47:11,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 16:47:11,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 16:47:11,051 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 84 [2024-11-08 16:47:11,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 79 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 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) [2024-11-08 16:47:11,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:47:11,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 84 [2024-11-08 16:47:11,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:47:14,183 INFO L124 PetriNetUnfolderBase]: 10262/15317 cut-off events. [2024-11-08 16:47:14,184 INFO L125 PetriNetUnfolderBase]: For 298/298 co-relation queries the response was YES. [2024-11-08 16:47:14,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27851 conditions, 15317 events. 10262/15317 cut-off events. For 298/298 co-relation queries the response was YES. Maximal size of possible extension queue 1201. Compared 111859 event pairs, 6408 based on Foata normal form. 1/8441 useless extension candidates. Maximal degree in co-relation 26255. Up to 11896 conditions per place. [2024-11-08 16:47:14,404 INFO L140 encePairwiseOnDemand]: 79/84 looper letters, 36 selfloop transitions, 2 changer transitions 0/75 dead transitions. [2024-11-08 16:47:14,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 75 transitions, 250 flow [2024-11-08 16:47:14,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 16:47:14,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 16:47:14,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 167 transitions. [2024-11-08 16:47:14,445 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6626984126984127 [2024-11-08 16:47:14,448 INFO L175 Difference]: Start difference. First operand has 80 places, 79 transitions, 182 flow. Second operand 3 states and 167 transitions. [2024-11-08 16:47:14,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 75 transitions, 250 flow [2024-11-08 16:47:14,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 75 transitions, 234 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-08 16:47:14,512 INFO L231 Difference]: Finished difference. Result has 70 places, 75 transitions, 162 flow [2024-11-08 16:47:14,522 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=162, PETRI_PLACES=70, PETRI_TRANSITIONS=75} [2024-11-08 16:47:14,537 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, -10 predicate places. [2024-11-08 16:47:14,537 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 75 transitions, 162 flow [2024-11-08 16:47:14,538 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 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) [2024-11-08 16:47:14,538 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:47:14,539 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-08 16:47:14,540 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-08 16:47:14,540 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-08 16:47:14,541 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:47:14,541 INFO L85 PathProgramCache]: Analyzing trace with hash 27494844, now seen corresponding path program 1 times [2024-11-08 16:47:14,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:47:14,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559763547] [2024-11-08 16:47:14,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:47:14,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:47:14,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:47:15,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:47:15,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:47:15,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559763547] [2024-11-08 16:47:15,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559763547] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:47:15,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:47:15,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 16:47:15,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784880235] [2024-11-08 16:47:15,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:47:15,088 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 16:47:15,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:47:15,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 16:47:15,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-08 16:47:15,163 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 84 [2024-11-08 16:47:15,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 75 transitions, 162 flow. Second operand has 5 states, 5 states have (on average 36.8) internal successors, (184), 5 states have internal predecessors, (184), 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) [2024-11-08 16:47:15,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:47:15,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 84 [2024-11-08 16:47:15,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:47:17,689 INFO L124 PetriNetUnfolderBase]: 10263/15322 cut-off events. [2024-11-08 16:47:17,690 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2024-11-08 16:47:17,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27464 conditions, 15322 events. 10263/15322 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 1201. Compared 111640 event pairs, 6408 based on Foata normal form. 0/8440 useless extension candidates. Maximal degree in co-relation 27419. Up to 11911 conditions per place. [2024-11-08 16:47:17,843 INFO L140 encePairwiseOnDemand]: 78/84 looper letters, 47 selfloop transitions, 4 changer transitions 0/80 dead transitions. [2024-11-08 16:47:17,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 80 transitions, 274 flow [2024-11-08 16:47:17,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 16:47:17,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 16:47:17,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 197 transitions. [2024-11-08 16:47:17,850 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5863095238095238 [2024-11-08 16:47:17,850 INFO L175 Difference]: Start difference. First operand has 70 places, 75 transitions, 162 flow. Second operand 4 states and 197 transitions. [2024-11-08 16:47:17,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 80 transitions, 274 flow [2024-11-08 16:47:17,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 80 transitions, 270 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 16:47:17,855 INFO L231 Difference]: Finished difference. Result has 73 places, 78 transitions, 187 flow [2024-11-08 16:47:17,856 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=187, PETRI_PLACES=73, PETRI_TRANSITIONS=78} [2024-11-08 16:47:17,857 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, -7 predicate places. [2024-11-08 16:47:17,857 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 78 transitions, 187 flow [2024-11-08 16:47:17,857 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.8) internal successors, (184), 5 states have internal predecessors, (184), 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) [2024-11-08 16:47:17,858 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:47:17,858 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-08 16:47:17,858 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-08 16:47:17,859 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-08 16:47:17,859 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:47:17,859 INFO L85 PathProgramCache]: Analyzing trace with hash 651939379, now seen corresponding path program 1 times [2024-11-08 16:47:17,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:47:17,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344283873] [2024-11-08 16:47:17,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:47:17,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:47:17,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:47:18,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:47:18,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:47:18,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344283873] [2024-11-08 16:47:18,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344283873] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:47:18,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:47:18,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 16:47:18,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182344775] [2024-11-08 16:47:18,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:47:18,245 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 16:47:18,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:47:18,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 16:47:18,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-08 16:47:18,314 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 84 [2024-11-08 16:47:18,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 78 transitions, 187 flow. Second operand has 6 states, 6 states have (on average 37.0) internal successors, (222), 6 states have internal predecessors, (222), 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) [2024-11-08 16:47:18,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:47:18,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 84 [2024-11-08 16:47:18,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:47:20,881 INFO L124 PetriNetUnfolderBase]: 10265/15329 cut-off events. [2024-11-08 16:47:20,882 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2024-11-08 16:47:20,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27490 conditions, 15329 events. 10265/15329 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 1201. Compared 111591 event pairs, 6408 based on Foata normal form. 0/8448 useless extension candidates. Maximal degree in co-relation 27456. Up to 11911 conditions per place. [2024-11-08 16:47:21,044 INFO L140 encePairwiseOnDemand]: 76/84 looper letters, 50 selfloop transitions, 8 changer transitions 0/87 dead transitions. [2024-11-08 16:47:21,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 87 transitions, 321 flow [2024-11-08 16:47:21,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 16:47:21,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 16:47:21,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 239 transitions. [2024-11-08 16:47:21,049 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.569047619047619 [2024-11-08 16:47:21,049 INFO L175 Difference]: Start difference. First operand has 73 places, 78 transitions, 187 flow. Second operand 5 states and 239 transitions. [2024-11-08 16:47:21,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 87 transitions, 321 flow [2024-11-08 16:47:21,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 87 transitions, 318 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-08 16:47:21,055 INFO L231 Difference]: Finished difference. Result has 78 places, 82 transitions, 226 flow [2024-11-08 16:47:21,056 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=226, PETRI_PLACES=78, PETRI_TRANSITIONS=82} [2024-11-08 16:47:21,058 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, -2 predicate places. [2024-11-08 16:47:21,059 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 82 transitions, 226 flow [2024-11-08 16:47:21,059 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 37.0) internal successors, (222), 6 states have internal predecessors, (222), 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) [2024-11-08 16:47:21,060 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:47:21,060 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2024-11-08 16:47:21,060 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-08 16:47:21,061 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-08 16:47:21,061 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:47:21,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1238934660, now seen corresponding path program 1 times [2024-11-08 16:47:21,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:47:21,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764849124] [2024-11-08 16:47:21,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:47:21,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:47:21,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:47:21,585 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:47:21,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:47:21,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764849124] [2024-11-08 16:47:21,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764849124] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:47:21,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638683835] [2024-11-08 16:47:21,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:47:21,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:47:21,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b6359f-5388-478e-a963-1c0f62774917/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:47:21,591 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b6359f-5388-478e-a963-1c0f62774917/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:47:21,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b6359f-5388-478e-a963-1c0f62774917/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-08 16:47:21,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:47:21,711 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-08 16:47:21,717 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:47:21,826 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 10 treesize of output 9 [2024-11-08 16:47:22,174 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:47:22,175 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:47:22,325 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:47:22,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638683835] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:47:22,326 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:47:22,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 10 [2024-11-08 16:47:22,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125630726] [2024-11-08 16:47:22,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:47:22,327 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-08 16:47:22,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:47:22,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-08 16:47:22,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2024-11-08 16:47:22,448 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 84 [2024-11-08 16:47:22,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 82 transitions, 226 flow. Second operand has 12 states, 12 states have (on average 37.75) internal successors, (453), 12 states have internal predecessors, (453), 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) [2024-11-08 16:47:22,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:47:22,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 84 [2024-11-08 16:47:22,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:47:24,974 INFO L124 PetriNetUnfolderBase]: 10265/15332 cut-off events. [2024-11-08 16:47:24,974 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-11-08 16:47:25,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27516 conditions, 15332 events. 10265/15332 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 1201. Compared 111603 event pairs, 6408 based on Foata normal form. 2/8456 useless extension candidates. Maximal degree in co-relation 27468. Up to 11907 conditions per place. [2024-11-08 16:47:25,337 INFO L140 encePairwiseOnDemand]: 74/84 looper letters, 42 selfloop transitions, 16 changer transitions 0/87 dead transitions. [2024-11-08 16:47:25,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 87 transitions, 357 flow [2024-11-08 16:47:25,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-08 16:47:25,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-08 16:47:25,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 418 transitions. [2024-11-08 16:47:25,340 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4976190476190476 [2024-11-08 16:47:25,341 INFO L175 Difference]: Start difference. First operand has 78 places, 82 transitions, 226 flow. Second operand 10 states and 418 transitions. [2024-11-08 16:47:25,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 87 transitions, 357 flow [2024-11-08 16:47:25,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 87 transitions, 356 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-08 16:47:25,345 INFO L231 Difference]: Finished difference. Result has 85 places, 83 transitions, 264 flow [2024-11-08 16:47:25,345 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=264, PETRI_PLACES=85, PETRI_TRANSITIONS=83} [2024-11-08 16:47:25,346 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, 5 predicate places. [2024-11-08 16:47:25,347 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 83 transitions, 264 flow [2024-11-08 16:47:25,347 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 37.75) internal successors, (453), 12 states have internal predecessors, (453), 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) [2024-11-08 16:47:25,347 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:47:25,348 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2024-11-08 16:47:25,373 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b6359f-5388-478e-a963-1c0f62774917/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-08 16:47:25,548 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b6359f-5388-478e-a963-1c0f62774917/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:47:25,549 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-08 16:47:25,549 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:47:25,549 INFO L85 PathProgramCache]: Analyzing trace with hash 84777307, now seen corresponding path program 1 times [2024-11-08 16:47:25,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:47:25,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133653641] [2024-11-08 16:47:25,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:47:25,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:47:25,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:47:26,100 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:47:26,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:47:26,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133653641] [2024-11-08 16:47:26,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133653641] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:47:26,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17063352] [2024-11-08 16:47:26,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:47:26,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:47:26,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b6359f-5388-478e-a963-1c0f62774917/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:47:26,104 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b6359f-5388-478e-a963-1c0f62774917/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:47:26,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b6359f-5388-478e-a963-1c0f62774917/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-08 16:47:26,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:47:26,210 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-08 16:47:26,213 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:47:26,237 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 10 treesize of output 9 [2024-11-08 16:47:26,548 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:47:26,548 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:47:26,904 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:47:26,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17063352] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:47:26,904 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:47:26,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 12 [2024-11-08 16:47:26,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117687554] [2024-11-08 16:47:26,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:47:26,905 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-08 16:47:26,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:47:26,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-08 16:47:26,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2024-11-08 16:47:27,097 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 84 [2024-11-08 16:47:27,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 83 transitions, 264 flow. Second operand has 14 states, 14 states have (on average 37.785714285714285) internal successors, (529), 14 states have internal predecessors, (529), 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) [2024-11-08 16:47:27,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:47:27,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 84 [2024-11-08 16:47:27,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:47:29,357 INFO L124 PetriNetUnfolderBase]: 10264/15330 cut-off events. [2024-11-08 16:47:29,357 INFO L125 PetriNetUnfolderBase]: For 46/46 co-relation queries the response was YES. [2024-11-08 16:47:29,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27527 conditions, 15330 events. 10264/15330 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 1201. Compared 111665 event pairs, 6408 based on Foata normal form. 2/8457 useless extension candidates. Maximal degree in co-relation 27471. Up to 11897 conditions per place. [2024-11-08 16:47:29,494 INFO L140 encePairwiseOnDemand]: 75/84 looper letters, 41 selfloop transitions, 16 changer transitions 0/86 dead transitions. [2024-11-08 16:47:29,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 86 transitions, 382 flow [2024-11-08 16:47:29,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-08 16:47:29,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-08 16:47:29,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 308 transitions. [2024-11-08 16:47:29,496 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-11-08 16:47:29,497 INFO L175 Difference]: Start difference. First operand has 85 places, 83 transitions, 264 flow. Second operand 7 states and 308 transitions. [2024-11-08 16:47:29,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 86 transitions, 382 flow [2024-11-08 16:47:29,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 86 transitions, 344 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-11-08 16:47:29,501 INFO L231 Difference]: Finished difference. Result has 84 places, 82 transitions, 262 flow [2024-11-08 16:47:29,501 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=262, PETRI_PLACES=84, PETRI_TRANSITIONS=82} [2024-11-08 16:47:29,502 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, 4 predicate places. [2024-11-08 16:47:29,502 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 82 transitions, 262 flow [2024-11-08 16:47:29,503 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 37.785714285714285) internal successors, (529), 14 states have internal predecessors, (529), 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) [2024-11-08 16:47:29,503 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:47:29,503 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:47:29,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b6359f-5388-478e-a963-1c0f62774917/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-08 16:47:29,708 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b6359f-5388-478e-a963-1c0f62774917/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:47:29,708 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-08 16:47:29,709 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:47:29,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1258139572, now seen corresponding path program 1 times [2024-11-08 16:47:29,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:47:29,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886110962] [2024-11-08 16:47:29,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:47:29,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:47:29,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:47:29,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:47:29,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:47:29,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886110962] [2024-11-08 16:47:29,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886110962] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:47:29,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:47:29,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 16:47:29,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569154269] [2024-11-08 16:47:29,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:47:29,862 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 16:47:29,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:47:29,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 16:47:29,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 16:47:29,897 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 84 [2024-11-08 16:47:29,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 82 transitions, 262 flow. Second operand has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 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) [2024-11-08 16:47:29,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:47:29,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 84 [2024-11-08 16:47:29,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:47:31,468 INFO L124 PetriNetUnfolderBase]: 11391/17226 cut-off events. [2024-11-08 16:47:31,468 INFO L125 PetriNetUnfolderBase]: For 69/69 co-relation queries the response was YES. [2024-11-08 16:47:31,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30899 conditions, 17226 events. 11391/17226 cut-off events. For 69/69 co-relation queries the response was YES. Maximal size of possible extension queue 1236. Compared 129126 event pairs, 7188 based on Foata normal form. 298/9985 useless extension candidates. Maximal degree in co-relation 30831. Up to 11914 conditions per place. [2024-11-08 16:47:31,662 INFO L140 encePairwiseOnDemand]: 73/84 looper letters, 78 selfloop transitions, 6 changer transitions 0/118 dead transitions. [2024-11-08 16:47:31,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 118 transitions, 536 flow [2024-11-08 16:47:31,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 16:47:31,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 16:47:31,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 284 transitions. [2024-11-08 16:47:31,664 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6761904761904762 [2024-11-08 16:47:31,665 INFO L175 Difference]: Start difference. First operand has 84 places, 82 transitions, 262 flow. Second operand 5 states and 284 transitions. [2024-11-08 16:47:31,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 118 transitions, 536 flow [2024-11-08 16:47:31,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 118 transitions, 488 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-11-08 16:47:31,670 INFO L231 Difference]: Finished difference. Result has 85 places, 86 transitions, 283 flow [2024-11-08 16:47:31,670 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=283, PETRI_PLACES=85, PETRI_TRANSITIONS=86} [2024-11-08 16:47:31,671 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, 5 predicate places. [2024-11-08 16:47:31,671 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 86 transitions, 283 flow [2024-11-08 16:47:31,671 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 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) [2024-11-08 16:47:31,672 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:47:31,672 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:47:31,672 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-08 16:47:31,672 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-08 16:47:31,673 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:47:31,673 INFO L85 PathProgramCache]: Analyzing trace with hash -579178577, now seen corresponding path program 1 times [2024-11-08 16:47:31,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:47:31,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541898368] [2024-11-08 16:47:31,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:47:31,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:47:31,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:47:31,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:47:31,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:47:31,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541898368] [2024-11-08 16:47:31,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541898368] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:47:31,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:47:31,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 16:47:31,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714600874] [2024-11-08 16:47:31,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:47:31,806 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 16:47:31,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:47:31,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 16:47:31,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 16:47:31,830 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 84 [2024-11-08 16:47:31,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 86 transitions, 283 flow. Second operand has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 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) [2024-11-08 16:47:31,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:47:31,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 84 [2024-11-08 16:47:31,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:47:33,956 INFO L124 PetriNetUnfolderBase]: 12963/20848 cut-off events. [2024-11-08 16:47:33,956 INFO L125 PetriNetUnfolderBase]: For 1458/1458 co-relation queries the response was YES. [2024-11-08 16:47:34,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40595 conditions, 20848 events. 12963/20848 cut-off events. For 1458/1458 co-relation queries the response was YES. Maximal size of possible extension queue 1353. Compared 172694 event pairs, 8149 based on Foata normal form. 262/12163 useless extension candidates. Maximal degree in co-relation 40531. Up to 13324 conditions per place. [2024-11-08 16:47:34,171 INFO L140 encePairwiseOnDemand]: 73/84 looper letters, 67 selfloop transitions, 11 changer transitions 0/112 dead transitions. [2024-11-08 16:47:34,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 112 transitions, 511 flow [2024-11-08 16:47:34,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 16:47:34,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 16:47:34,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 275 transitions. [2024-11-08 16:47:34,173 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6547619047619048 [2024-11-08 16:47:34,173 INFO L175 Difference]: Start difference. First operand has 85 places, 86 transitions, 283 flow. Second operand 5 states and 275 transitions. [2024-11-08 16:47:34,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 112 transitions, 511 flow [2024-11-08 16:47:34,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 112 transitions, 509 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-08 16:47:34,181 INFO L231 Difference]: Finished difference. Result has 90 places, 87 transitions, 330 flow [2024-11-08 16:47:34,181 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=330, PETRI_PLACES=90, PETRI_TRANSITIONS=87} [2024-11-08 16:47:34,182 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, 10 predicate places. [2024-11-08 16:47:34,182 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 87 transitions, 330 flow [2024-11-08 16:47:34,183 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 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) [2024-11-08 16:47:34,183 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:47:34,183 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:47:34,183 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-08 16:47:34,183 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-08 16:47:34,183 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:47:34,184 INFO L85 PathProgramCache]: Analyzing trace with hash -878811660, now seen corresponding path program 1 times [2024-11-08 16:47:34,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:47:34,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531605317] [2024-11-08 16:47:34,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:47:34,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:47:34,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:47:34,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:47:34,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:47:34,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531605317] [2024-11-08 16:47:34,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531605317] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:47:34,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:47:34,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 16:47:34,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809745563] [2024-11-08 16:47:34,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:47:34,408 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 16:47:34,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:47:34,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 16:47:34,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 16:47:34,427 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 84 [2024-11-08 16:47:34,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 87 transitions, 330 flow. Second operand has 4 states, 4 states have (on average 43.75) internal successors, (175), 4 states have internal predecessors, (175), 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) [2024-11-08 16:47:34,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:47:34,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 84 [2024-11-08 16:47:34,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:47:36,074 INFO L124 PetriNetUnfolderBase]: 8972/14824 cut-off events. [2024-11-08 16:47:36,074 INFO L125 PetriNetUnfolderBase]: For 2193/2193 co-relation queries the response was YES. [2024-11-08 16:47:36,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30963 conditions, 14824 events. 8972/14824 cut-off events. For 2193/2193 co-relation queries the response was YES. Maximal size of possible extension queue 969. Compared 119955 event pairs, 5666 based on Foata normal form. 0/9091 useless extension candidates. Maximal degree in co-relation 30893. Up to 10462 conditions per place. [2024-11-08 16:47:36,189 INFO L140 encePairwiseOnDemand]: 79/84 looper letters, 37 selfloop transitions, 9 changer transitions 0/85 dead transitions. [2024-11-08 16:47:36,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 85 transitions, 414 flow [2024-11-08 16:47:36,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 16:47:36,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 16:47:36,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 248 transitions. [2024-11-08 16:47:36,191 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5904761904761905 [2024-11-08 16:47:36,191 INFO L175 Difference]: Start difference. First operand has 90 places, 87 transitions, 330 flow. Second operand 5 states and 248 transitions. [2024-11-08 16:47:36,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 85 transitions, 414 flow [2024-11-08 16:47:36,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 85 transitions, 401 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-08 16:47:36,200 INFO L231 Difference]: Finished difference. Result has 90 places, 85 transitions, 327 flow [2024-11-08 16:47:36,201 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=327, PETRI_PLACES=90, PETRI_TRANSITIONS=85} [2024-11-08 16:47:36,202 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, 10 predicate places. [2024-11-08 16:47:36,202 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 85 transitions, 327 flow [2024-11-08 16:47:36,202 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.75) internal successors, (175), 4 states have internal predecessors, (175), 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) [2024-11-08 16:47:36,202 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:47:36,203 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:47:36,203 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-08 16:47:36,203 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-08 16:47:36,203 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:47:36,204 INFO L85 PathProgramCache]: Analyzing trace with hash -878811659, now seen corresponding path program 1 times [2024-11-08 16:47:36,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:47:36,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973560316] [2024-11-08 16:47:36,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:47:36,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:47:36,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:47:36,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:47:36,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:47:36,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973560316] [2024-11-08 16:47:36,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973560316] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:47:36,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132975611] [2024-11-08 16:47:36,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:47:36,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:47:36,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b6359f-5388-478e-a963-1c0f62774917/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:47:36,518 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b6359f-5388-478e-a963-1c0f62774917/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:47:36,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b6359f-5388-478e-a963-1c0f62774917/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-08 16:47:36,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:47:36,629 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-08 16:47:36,631 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:47:36,646 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2024-11-08 16:47:36,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 16:47:36,764 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-08 16:47:36,784 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-08 16:47:36,784 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-08 16:47:36,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:47:36,850 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 16:47:36,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132975611] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:47:36,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-08 16:47:36,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 8 [2024-11-08 16:47:36,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173480784] [2024-11-08 16:47:36,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:47:36,851 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 16:47:36,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:47:36,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 16:47:36,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-11-08 16:47:36,912 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 84 [2024-11-08 16:47:36,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 85 transitions, 327 flow. Second operand has 6 states, 6 states have (on average 39.5) internal successors, (237), 6 states have internal predecessors, (237), 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) [2024-11-08 16:47:36,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:47:36,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 84 [2024-11-08 16:47:36,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:47:37,818 INFO L124 PetriNetUnfolderBase]: 5793/9946 cut-off events. [2024-11-08 16:47:37,818 INFO L125 PetriNetUnfolderBase]: For 1645/1645 co-relation queries the response was YES. [2024-11-08 16:47:37,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20032 conditions, 9946 events. 5793/9946 cut-off events. For 1645/1645 co-relation queries the response was YES. Maximal size of possible extension queue 653. Compared 78967 event pairs, 3687 based on Foata normal form. 0/6691 useless extension candidates. Maximal degree in co-relation 15576. Up to 6837 conditions per place. [2024-11-08 16:47:37,900 INFO L140 encePairwiseOnDemand]: 80/84 looper letters, 45 selfloop transitions, 4 changer transitions 0/83 dead transitions. [2024-11-08 16:47:37,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 83 transitions, 417 flow [2024-11-08 16:47:37,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 16:47:37,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 16:47:37,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 191 transitions. [2024-11-08 16:47:37,902 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5684523809523809 [2024-11-08 16:47:37,902 INFO L175 Difference]: Start difference. First operand has 90 places, 85 transitions, 327 flow. Second operand 4 states and 191 transitions. [2024-11-08 16:47:37,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 83 transitions, 417 flow [2024-11-08 16:47:37,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 83 transitions, 404 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-08 16:47:37,911 INFO L231 Difference]: Finished difference. Result has 88 places, 83 transitions, 314 flow [2024-11-08 16:47:37,911 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=314, PETRI_PLACES=88, PETRI_TRANSITIONS=83} [2024-11-08 16:47:37,912 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, 8 predicate places. [2024-11-08 16:47:37,912 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 83 transitions, 314 flow [2024-11-08 16:47:37,913 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 39.5) internal successors, (237), 6 states have internal predecessors, (237), 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) [2024-11-08 16:47:37,913 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:47:37,913 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:47:37,929 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b6359f-5388-478e-a963-1c0f62774917/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-08 16:47:38,113 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b6359f-5388-478e-a963-1c0f62774917/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-08 16:47:38,114 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-08 16:47:38,114 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:47:38,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1611839609, now seen corresponding path program 1 times [2024-11-08 16:47:38,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:47:38,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425494909] [2024-11-08 16:47:38,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:47:38,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:47:38,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:47:38,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:47:38,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:47:38,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425494909] [2024-11-08 16:47:38,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425494909] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:47:38,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016683278] [2024-11-08 16:47:38,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:47:38,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:47:38,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b6359f-5388-478e-a963-1c0f62774917/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:47:38,474 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b6359f-5388-478e-a963-1c0f62774917/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:47:38,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b6359f-5388-478e-a963-1c0f62774917/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-08 16:47:38,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:47:38,583 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-08 16:47:38,584 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:47:38,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:47:38,731 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 16:47:38,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016683278] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:47:38,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-08 16:47:38,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2024-11-08 16:47:38,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158081364] [2024-11-08 16:47:38,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:47:38,733 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 16:47:38,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:47:38,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 16:47:38,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-08 16:47:38,815 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 84 [2024-11-08 16:47:38,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 83 transitions, 314 flow. Second operand has 6 states, 6 states have (on average 41.833333333333336) internal successors, (251), 6 states have internal predecessors, (251), 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) [2024-11-08 16:47:38,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:47:38,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 84 [2024-11-08 16:47:38,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:47:39,565 INFO L124 PetriNetUnfolderBase]: 4134/7400 cut-off events. [2024-11-08 16:47:39,565 INFO L125 PetriNetUnfolderBase]: For 1292/1292 co-relation queries the response was YES. [2024-11-08 16:47:39,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14373 conditions, 7400 events. 4134/7400 cut-off events. For 1292/1292 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 58227 event pairs, 2627 based on Foata normal form. 0/5256 useless extension candidates. Maximal degree in co-relation 11170. Up to 4868 conditions per place. [2024-11-08 16:47:39,626 INFO L140 encePairwiseOnDemand]: 78/84 looper letters, 36 selfloop transitions, 11 changer transitions 0/81 dead transitions. [2024-11-08 16:47:39,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 81 transitions, 400 flow [2024-11-08 16:47:39,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 16:47:39,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 16:47:39,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 237 transitions. [2024-11-08 16:47:39,628 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5642857142857143 [2024-11-08 16:47:39,628 INFO L175 Difference]: Start difference. First operand has 88 places, 83 transitions, 314 flow. Second operand 5 states and 237 transitions. [2024-11-08 16:47:39,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 81 transitions, 400 flow [2024-11-08 16:47:39,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 81 transitions, 395 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 16:47:39,634 INFO L231 Difference]: Finished difference. Result has 88 places, 81 transitions, 323 flow [2024-11-08 16:47:39,635 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=323, PETRI_PLACES=88, PETRI_TRANSITIONS=81} [2024-11-08 16:47:39,635 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, 8 predicate places. [2024-11-08 16:47:39,636 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 81 transitions, 323 flow [2024-11-08 16:47:39,636 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 41.833333333333336) internal successors, (251), 6 states have internal predecessors, (251), 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) [2024-11-08 16:47:39,636 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:47:39,636 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:47:39,661 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b6359f-5388-478e-a963-1c0f62774917/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-08 16:47:39,837 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b6359f-5388-478e-a963-1c0f62774917/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:47:39,837 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-08 16:47:39,838 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:47:39,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1611839610, now seen corresponding path program 1 times [2024-11-08 16:47:39,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:47:39,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636272757] [2024-11-08 16:47:39,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:47:39,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:47:39,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:47:39,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:47:39,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:47:39,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636272757] [2024-11-08 16:47:39,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636272757] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:47:39,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:47:39,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 16:47:39,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120046958] [2024-11-08 16:47:39,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:47:39,910 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 16:47:39,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:47:39,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 16:47:39,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 16:47:39,922 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 84 [2024-11-08 16:47:39,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 81 transitions, 323 flow. Second operand has 4 states, 4 states have (on average 44.25) internal successors, (177), 4 states have internal predecessors, (177), 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) [2024-11-08 16:47:39,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:47:39,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 84 [2024-11-08 16:47:39,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:47:40,494 INFO L124 PetriNetUnfolderBase]: 2791/5292 cut-off events. [2024-11-08 16:47:40,494 INFO L125 PetriNetUnfolderBase]: For 1024/1024 co-relation queries the response was YES. [2024-11-08 16:47:40,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9799 conditions, 5292 events. 2791/5292 cut-off events. For 1024/1024 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 41264 event pairs, 1773 based on Foata normal form. 0/4013 useless extension candidates. Maximal degree in co-relation 7608. Up to 3294 conditions per place. [2024-11-08 16:47:40,531 INFO L140 encePairwiseOnDemand]: 80/84 looper letters, 34 selfloop transitions, 6 changer transitions 0/79 dead transitions. [2024-11-08 16:47:40,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 79 transitions, 395 flow [2024-11-08 16:47:40,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 16:47:40,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 16:47:40,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 200 transitions. [2024-11-08 16:47:40,533 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-11-08 16:47:40,533 INFO L175 Difference]: Start difference. First operand has 88 places, 81 transitions, 323 flow. Second operand 4 states and 200 transitions. [2024-11-08 16:47:40,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 79 transitions, 395 flow [2024-11-08 16:47:40,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 79 transitions, 378 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-08 16:47:40,537 INFO L231 Difference]: Finished difference. Result has 86 places, 79 transitions, 310 flow [2024-11-08 16:47:40,537 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=310, PETRI_PLACES=86, PETRI_TRANSITIONS=79} [2024-11-08 16:47:40,537 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, 6 predicate places. [2024-11-08 16:47:40,537 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 79 transitions, 310 flow [2024-11-08 16:47:40,538 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.25) internal successors, (177), 4 states have internal predecessors, (177), 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) [2024-11-08 16:47:40,538 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:47:40,538 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:47:40,538 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-08 16:47:40,538 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-08 16:47:40,538 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:47:40,539 INFO L85 PathProgramCache]: Analyzing trace with hash 584801967, now seen corresponding path program 1 times [2024-11-08 16:47:40,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:47:40,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991168260] [2024-11-08 16:47:40,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:47:40,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:47:40,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:47:40,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:47:40,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:47:40,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991168260] [2024-11-08 16:47:40,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991168260] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:47:40,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:47:40,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 16:47:40,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330827936] [2024-11-08 16:47:40,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:47:40,847 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 16:47:40,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:47:40,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 16:47:40,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-08 16:47:40,889 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 84 [2024-11-08 16:47:40,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 79 transitions, 310 flow. Second operand has 5 states, 5 states have (on average 44.4) internal successors, (222), 5 states have internal predecessors, (222), 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) [2024-11-08 16:47:40,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:47:40,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 84 [2024-11-08 16:47:40,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:47:42,405 INFO L124 PetriNetUnfolderBase]: 6744/10590 cut-off events. [2024-11-08 16:47:42,405 INFO L125 PetriNetUnfolderBase]: For 2415/2415 co-relation queries the response was YES. [2024-11-08 16:47:42,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21752 conditions, 10590 events. 6744/10590 cut-off events. For 2415/2415 co-relation queries the response was YES. Maximal size of possible extension queue 621. Compared 73763 event pairs, 490 based on Foata normal form. 830/10527 useless extension candidates. Maximal degree in co-relation 19454. Up to 4821 conditions per place. [2024-11-08 16:47:42,509 INFO L140 encePairwiseOnDemand]: 76/84 looper letters, 78 selfloop transitions, 9 changer transitions 5/126 dead transitions. [2024-11-08 16:47:42,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 126 transitions, 619 flow [2024-11-08 16:47:42,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 16:47:42,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-08 16:47:42,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 325 transitions. [2024-11-08 16:47:42,512 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6448412698412699 [2024-11-08 16:47:42,512 INFO L175 Difference]: Start difference. First operand has 86 places, 79 transitions, 310 flow. Second operand 6 states and 325 transitions. [2024-11-08 16:47:42,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 126 transitions, 619 flow [2024-11-08 16:47:42,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 126 transitions, 612 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 16:47:42,518 INFO L231 Difference]: Finished difference. Result has 92 places, 79 transitions, 312 flow [2024-11-08 16:47:42,518 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=312, PETRI_PLACES=92, PETRI_TRANSITIONS=79} [2024-11-08 16:47:42,519 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, 12 predicate places. [2024-11-08 16:47:42,519 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 79 transitions, 312 flow [2024-11-08 16:47:42,520 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 44.4) internal successors, (222), 5 states have internal predecessors, (222), 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) [2024-11-08 16:47:42,520 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:47:42,520 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:47:42,520 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-08 16:47:42,520 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-08 16:47:42,521 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:47:42,521 INFO L85 PathProgramCache]: Analyzing trace with hash -763898525, now seen corresponding path program 1 times [2024-11-08 16:47:42,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:47:42,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559318449] [2024-11-08 16:47:42,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:47:42,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:47:42,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:47:42,664 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:47:42,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:47:42,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559318449] [2024-11-08 16:47:42,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559318449] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:47:42,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:47:42,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 16:47:42,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652950233] [2024-11-08 16:47:42,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:47:42,666 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 16:47:42,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:47:42,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 16:47:42,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 16:47:42,673 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 84 [2024-11-08 16:47:42,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 79 transitions, 312 flow. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 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) [2024-11-08 16:47:42,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:47:42,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 84 [2024-11-08 16:47:42,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:47:43,697 INFO L124 PetriNetUnfolderBase]: 3344/5527 cut-off events. [2024-11-08 16:47:43,697 INFO L125 PetriNetUnfolderBase]: For 3511/3859 co-relation queries the response was YES. [2024-11-08 16:47:43,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13383 conditions, 5527 events. 3344/5527 cut-off events. For 3511/3859 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 36720 event pairs, 389 based on Foata normal form. 224/5132 useless extension candidates. Maximal degree in co-relation 13329. Up to 3614 conditions per place. [2024-11-08 16:47:43,765 INFO L140 encePairwiseOnDemand]: 81/84 looper letters, 49 selfloop transitions, 4 changer transitions 2/95 dead transitions. [2024-11-08 16:47:43,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 95 transitions, 465 flow [2024-11-08 16:47:43,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 16:47:43,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 16:47:43,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 179 transitions. [2024-11-08 16:47:43,767 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7103174603174603 [2024-11-08 16:47:43,767 INFO L175 Difference]: Start difference. First operand has 92 places, 79 transitions, 312 flow. Second operand 3 states and 179 transitions. [2024-11-08 16:47:43,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 95 transitions, 465 flow [2024-11-08 16:47:43,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 95 transitions, 450 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-11-08 16:47:43,777 INFO L231 Difference]: Finished difference. Result has 89 places, 80 transitions, 317 flow [2024-11-08 16:47:43,777 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=317, PETRI_PLACES=89, PETRI_TRANSITIONS=80} [2024-11-08 16:47:43,778 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, 9 predicate places. [2024-11-08 16:47:43,778 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 80 transitions, 317 flow [2024-11-08 16:47:43,778 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 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) [2024-11-08 16:47:43,778 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:47:43,779 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:47:43,779 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-08 16:47:43,779 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-08 16:47:43,779 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:47:43,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1115515779, now seen corresponding path program 1 times [2024-11-08 16:47:43,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:47:43,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361569286] [2024-11-08 16:47:43,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:47:43,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:47:43,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:47:44,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:47:44,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:47:44,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361569286] [2024-11-08 16:47:44,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361569286] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:47:44,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133356363] [2024-11-08 16:47:44,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:47:44,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:47:44,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b6359f-5388-478e-a963-1c0f62774917/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:47:44,086 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b6359f-5388-478e-a963-1c0f62774917/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:47:44,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b6359f-5388-478e-a963-1c0f62774917/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-08 16:47:44,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:47:44,239 INFO L255 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-08 16:47:44,242 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:47:44,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:47:44,559 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:47:44,832 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:47:44,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133356363] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-08 16:47:44,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-08 16:47:44,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6, 7] total 15 [2024-11-08 16:47:44,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185505902] [2024-11-08 16:47:44,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:47:44,834 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-08 16:47:44,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:47:44,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-08 16:47:44,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2024-11-08 16:47:44,868 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 84 [2024-11-08 16:47:44,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 80 transitions, 317 flow. Second operand has 7 states, 7 states have (on average 36.42857142857143) internal successors, (255), 7 states have internal predecessors, (255), 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) [2024-11-08 16:47:44,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:47:44,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 84 [2024-11-08 16:47:44,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:47:48,906 INFO L124 PetriNetUnfolderBase]: 26069/35452 cut-off events. [2024-11-08 16:47:48,906 INFO L125 PetriNetUnfolderBase]: For 15002/15002 co-relation queries the response was YES. [2024-11-08 16:47:49,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85304 conditions, 35452 events. 26069/35452 cut-off events. For 15002/15002 co-relation queries the response was YES. Maximal size of possible extension queue 1796. Compared 232269 event pairs, 3418 based on Foata normal form. 987/32078 useless extension candidates. Maximal degree in co-relation 85252. Up to 12303 conditions per place. [2024-11-08 16:47:49,217 INFO L140 encePairwiseOnDemand]: 76/84 looper letters, 111 selfloop transitions, 15 changer transitions 0/152 dead transitions. [2024-11-08 16:47:49,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 152 transitions, 783 flow [2024-11-08 16:47:49,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 16:47:49,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-08 16:47:49,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 306 transitions. [2024-11-08 16:47:49,219 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-11-08 16:47:49,219 INFO L175 Difference]: Start difference. First operand has 89 places, 80 transitions, 317 flow. Second operand 6 states and 306 transitions. [2024-11-08 16:47:49,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 152 transitions, 783 flow [2024-11-08 16:47:49,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 152 transitions, 774 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-11-08 16:47:49,264 INFO L231 Difference]: Finished difference. Result has 97 places, 88 transitions, 418 flow [2024-11-08 16:47:49,264 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=305, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=418, PETRI_PLACES=97, PETRI_TRANSITIONS=88} [2024-11-08 16:47:49,265 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, 17 predicate places. [2024-11-08 16:47:49,265 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 88 transitions, 418 flow [2024-11-08 16:47:49,265 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 36.42857142857143) internal successors, (255), 7 states have internal predecessors, (255), 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) [2024-11-08 16:47:49,265 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:47:49,266 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:47:49,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b6359f-5388-478e-a963-1c0f62774917/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-08 16:47:49,466 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b6359f-5388-478e-a963-1c0f62774917/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:47:49,466 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-08 16:47:49,467 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:47:49,467 INFO L85 PathProgramCache]: Analyzing trace with hash -650759707, now seen corresponding path program 1 times [2024-11-08 16:47:49,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:47:49,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075342675] [2024-11-08 16:47:49,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:47:49,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:47:49,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:47:50,377 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:47:50,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:47:50,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075342675] [2024-11-08 16:47:50,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075342675] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:47:50,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469975260] [2024-11-08 16:47:50,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:47:50,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:47:50,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b6359f-5388-478e-a963-1c0f62774917/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:47:50,380 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b6359f-5388-478e-a963-1c0f62774917/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:47:50,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b6359f-5388-478e-a963-1c0f62774917/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-08 16:47:50,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:47:50,522 INFO L255 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-08 16:47:50,527 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:47:50,582 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 23 treesize of output 1 [2024-11-08 16:47:50,834 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2024-11-08 16:47:50,842 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 10 treesize of output 8 [2024-11-08 16:47:51,014 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-08 16:47:51,044 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:47:51,045 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:47:51,252 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 4 [2024-11-08 16:47:51,259 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 10 treesize of output 8 [2024-11-08 16:47:51,889 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 39 treesize of output 35 [2024-11-08 16:47:51,898 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 47 treesize of output 35 [2024-11-08 16:47:51,994 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:47:51,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469975260] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:47:51,995 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:47:51,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 19 [2024-11-08 16:47:51,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821953376] [2024-11-08 16:47:51,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:47:51,996 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-08 16:47:51,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:47:51,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-08 16:47:51,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2024-11-08 16:47:52,388 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 84 [2024-11-08 16:47:52,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 88 transitions, 418 flow. Second operand has 20 states, 20 states have (on average 41.1) internal successors, (822), 20 states have internal predecessors, (822), 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) [2024-11-08 16:47:52,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:47:52,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 84 [2024-11-08 16:47:52,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:47:58,179 INFO L124 PetriNetUnfolderBase]: 20841/35643 cut-off events. [2024-11-08 16:47:58,180 INFO L125 PetriNetUnfolderBase]: For 48776/50436 co-relation queries the response was YES. [2024-11-08 16:47:58,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92330 conditions, 35643 events. 20841/35643 cut-off events. For 48776/50436 co-relation queries the response was YES. Maximal size of possible extension queue 1472. Compared 310808 event pairs, 1138 based on Foata normal form. 592/32040 useless extension candidates. Maximal degree in co-relation 56503. Up to 10205 conditions per place. [2024-11-08 16:47:58,578 INFO L140 encePairwiseOnDemand]: 71/84 looper letters, 229 selfloop transitions, 63 changer transitions 13/340 dead transitions. [2024-11-08 16:47:58,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 340 transitions, 2067 flow [2024-11-08 16:47:58,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-08 16:47:58,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-11-08 16:47:58,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1231 transitions. [2024-11-08 16:47:58,584 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5861904761904762 [2024-11-08 16:47:58,584 INFO L175 Difference]: Start difference. First operand has 97 places, 88 transitions, 418 flow. Second operand 25 states and 1231 transitions. [2024-11-08 16:47:58,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 340 transitions, 2067 flow [2024-11-08 16:47:58,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 340 transitions, 2043 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-11-08 16:47:58,686 INFO L231 Difference]: Finished difference. Result has 128 places, 142 transitions, 1048 flow [2024-11-08 16:47:58,687 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=411, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1048, PETRI_PLACES=128, PETRI_TRANSITIONS=142} [2024-11-08 16:47:58,687 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, 48 predicate places. [2024-11-08 16:47:58,687 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 142 transitions, 1048 flow [2024-11-08 16:47:58,688 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 41.1) internal successors, (822), 20 states have internal predecessors, (822), 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) [2024-11-08 16:47:58,688 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:47:58,688 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:47:58,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b6359f-5388-478e-a963-1c0f62774917/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-08 16:47:58,888 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b6359f-5388-478e-a963-1c0f62774917/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-08 16:47:58,889 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-08 16:47:58,889 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:47:58,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1369398451, now seen corresponding path program 1 times [2024-11-08 16:47:58,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:47:58,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267995827] [2024-11-08 16:47:58,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:47:58,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:47:58,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:47:59,250 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 16:47:59,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:47:59,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267995827] [2024-11-08 16:47:59,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267995827] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:47:59,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385090466] [2024-11-08 16:47:59,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:47:59,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:47:59,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b6359f-5388-478e-a963-1c0f62774917/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:47:59,254 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b6359f-5388-478e-a963-1c0f62774917/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:47:59,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b6359f-5388-478e-a963-1c0f62774917/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-08 16:47:59,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:47:59,409 INFO L255 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-08 16:47:59,412 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:47:59,624 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 16:47:59,624 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:47:59,697 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 16:47:59,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385090466] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:47:59,697 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:47:59,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2024-11-08 16:47:59,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75750302] [2024-11-08 16:47:59,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:47:59,700 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-08 16:47:59,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:47:59,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-08 16:47:59,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2024-11-08 16:47:59,733 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 84 [2024-11-08 16:47:59,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 142 transitions, 1048 flow. Second operand has 13 states, 13 states have (on average 39.0) internal successors, (507), 13 states have internal predecessors, (507), 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) [2024-11-08 16:47:59,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:47:59,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 84 [2024-11-08 16:47:59,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand