./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1 --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 23ca06a4d1d66eab783b29fc3ce31114eee62eb7d17a2452b84e2d73b8d92cfa --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-12-02 15:32:53,780 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-12-02 15:32:53,837 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-12-02 15:32:53,842 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-12-02 15:32:53,842 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-12-02 15:32:53,862 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-12-02 15:32:53,863 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-12-02 15:32:53,863 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-12-02 15:32:53,863 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-12-02 15:32:53,864 INFO L153 SettingsManager]: * Use memory slicer=true [2024-12-02 15:32:53,864 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-12-02 15:32:53,864 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-12-02 15:32:53,864 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-12-02 15:32:53,864 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-12-02 15:32:53,864 INFO L153 SettingsManager]: * Use SBE=true [2024-12-02 15:32:53,864 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-12-02 15:32:53,865 INFO L153 SettingsManager]: * sizeof long=4 [2024-12-02 15:32:53,865 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-12-02 15:32:53,865 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-12-02 15:32:53,865 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-12-02 15:32:53,865 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-12-02 15:32:53,865 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-12-02 15:32:53,865 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-12-02 15:32:53,865 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-12-02 15:32:53,865 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-12-02 15:32:53,865 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-12-02 15:32:53,865 INFO L153 SettingsManager]: * sizeof long double=12 [2024-12-02 15:32:53,865 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-12-02 15:32:53,866 INFO L153 SettingsManager]: * Use constant arrays=true [2024-12-02 15:32:53,866 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-12-02 15:32:53,866 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 15:32:53,866 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 15:32:53,866 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 15:32:53,866 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 15:32:53,866 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-12-02 15:32:53,866 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 15:32:53,866 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 15:32:53,866 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 15:32:53,866 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 15:32:53,866 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-12-02 15:32:53,867 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-12-02 15:32:53,867 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-12-02 15:32:53,867 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-12-02 15:32:53,867 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-12-02 15:32:53,867 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-12-02 15:32:53,867 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-12-02 15:32:53,867 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-12-02 15:32:53,867 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G 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 -> 23ca06a4d1d66eab783b29fc3ce31114eee62eb7d17a2452b84e2d73b8d92cfa [2024-12-02 15:32:54,082 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-12-02 15:32:54,090 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-12-02 15:32:54,092 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-12-02 15:32:54,093 INFO L270 PluginConnector]: Initializing CDTParser... [2024-12-02 15:32:54,093 INFO L274 PluginConnector]: CDTParser initialized [2024-12-02 15:32:54,094 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/../../sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c [2024-12-02 15:32:56,735 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/data/2b61eb1a7/460de26d784d4d9c9468f4e9c578af5e/FLAGe1ea3a72a [2024-12-02 15:32:56,924 INFO L384 CDTParser]: Found 1 translation units. [2024-12-02 15:32:56,924 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c [2024-12-02 15:32:56,931 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/data/2b61eb1a7/460de26d784d4d9c9468f4e9c578af5e/FLAGe1ea3a72a [2024-12-02 15:32:57,279 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/data/2b61eb1a7/460de26d784d4d9c9468f4e9c578af5e [2024-12-02 15:32:57,282 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-12-02 15:32:57,283 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-12-02 15:32:57,284 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-12-02 15:32:57,284 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-12-02 15:32:57,288 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-12-02 15:32:57,288 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 03:32:57" (1/1) ... [2024-12-02 15:32:57,289 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67e1db07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:32:57, skipping insertion in model container [2024-12-02 15:32:57,289 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 03:32:57" (1/1) ... [2024-12-02 15:32:57,301 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-12-02 15:32:57,467 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-12-02 15:32:57,471 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 15:32:57,481 INFO L200 MainTranslator]: Completed pre-run [2024-12-02 15:32:57,506 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 15:32:57,522 INFO L204 MainTranslator]: Completed translation [2024-12-02 15:32:57,522 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:32:57 WrapperNode [2024-12-02 15:32:57,523 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-12-02 15:32:57,523 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-12-02 15:32:57,524 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-12-02 15:32:57,524 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-12-02 15:32:57,531 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:32:57" (1/1) ... [2024-12-02 15:32:57,538 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:32:57" (1/1) ... [2024-12-02 15:32:57,562 INFO L138 Inliner]: procedures = 24, calls = 28, calls flagged for inlining = 16, calls inlined = 20, statements flattened = 189 [2024-12-02 15:32:57,563 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-12-02 15:32:57,563 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-12-02 15:32:57,563 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-12-02 15:32:57,563 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-12-02 15:32:57,572 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:32:57" (1/1) ... [2024-12-02 15:32:57,573 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:32:57" (1/1) ... [2024-12-02 15:32:57,576 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:32:57" (1/1) ... [2024-12-02 15:32:57,593 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]. [2024-12-02 15:32:57,593 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:32:57" (1/1) ... [2024-12-02 15:32:57,593 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:32:57" (1/1) ... [2024-12-02 15:32:57,601 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:32:57" (1/1) ... [2024-12-02 15:32:57,602 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:32:57" (1/1) ... [2024-12-02 15:32:57,606 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:32:57" (1/1) ... [2024-12-02 15:32:57,607 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:32:57" (1/1) ... [2024-12-02 15:32:57,609 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:32:57" (1/1) ... [2024-12-02 15:32:57,611 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-12-02 15:32:57,612 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-12-02 15:32:57,613 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-12-02 15:32:57,613 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-12-02 15:32:57,614 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:32:57" (1/1) ... [2024-12-02 15:32:57,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 15:32:57,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:32:57,645 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-12-02 15:32:57,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-12-02 15:32:57,677 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-12-02 15:32:57,677 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-12-02 15:32:57,677 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-12-02 15:32:57,677 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-12-02 15:32:57,677 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-12-02 15:32:57,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-12-02 15:32:57,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-12-02 15:32:57,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-12-02 15:32:57,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-12-02 15:32:57,677 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-12-02 15:32:57,678 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-12-02 15:32:57,678 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-12-02 15:32:57,678 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-12-02 15:32:57,678 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-12-02 15:32:57,679 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-12-02 15:32:57,765 INFO L234 CfgBuilder]: Building ICFG [2024-12-02 15:32:57,766 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-12-02 15:32:58,128 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-12-02 15:32:58,128 INFO L283 CfgBuilder]: Performing block encoding [2024-12-02 15:32:58,428 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-12-02 15:32:58,428 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2024-12-02 15:32:58,429 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 03:32:58 BoogieIcfgContainer [2024-12-02 15:32:58,429 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-12-02 15:32:58,431 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-12-02 15:32:58,431 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-12-02 15:32:58,436 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-12-02 15:32:58,436 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 03:32:57" (1/3) ... [2024-12-02 15:32:58,436 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67b23172 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 03:32:58, skipping insertion in model container [2024-12-02 15:32:58,437 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:32:57" (2/3) ... [2024-12-02 15:32:58,437 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67b23172 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 03:32:58, skipping insertion in model container [2024-12-02 15:32:58,437 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 03:32:58" (3/3) ... [2024-12-02 15:32:58,438 INFO L128 eAbstractionObserver]: Analyzing ICFG chl-chromosome-symm.wvr.c [2024-12-02 15:32:58,455 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-12-02 15:32:58,456 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG chl-chromosome-symm.wvr.c that has 3 procedures, 39 locations, 1 initial locations, 4 loop locations, and 14 error locations. [2024-12-02 15:32:58,457 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-12-02 15:32:58,521 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-12-02 15:32:58,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 45 places, 42 transitions, 98 flow [2024-12-02 15:32:58,592 INFO L124 PetriNetUnfolderBase]: 4/40 cut-off events. [2024-12-02 15:32:58,595 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-12-02 15:32:58,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 40 events. 4/40 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 86 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 24. Up to 2 conditions per place. [2024-12-02 15:32:58,598 INFO L82 GeneralOperation]: Start removeDead. Operand has 45 places, 42 transitions, 98 flow [2024-12-02 15:32:58,601 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 39 transitions, 90 flow [2024-12-02 15:32:58,609 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-12-02 15:32:58,622 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;@1cd08da3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-12-02 15:32:58,622 INFO L334 AbstractCegarLoop]: Starting to check reachability of 24 error locations. [2024-12-02 15:32:58,626 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-12-02 15:32:58,626 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-12-02 15:32:58,627 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-12-02 15:32:58,627 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 15:32:58,627 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-12-02 15:32:58,628 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-12-02 15:32:58,633 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:32:58,634 INFO L85 PathProgramCache]: Analyzing trace with hash 663423, now seen corresponding path program 1 times [2024-12-02 15:32:58,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:32:58,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379784618] [2024-12-02 15:32:58,643 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 15:32:58,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:32:58,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:32:58,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 15:32:58,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:32:58,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379784618] [2024-12-02 15:32:58,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379784618] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 15:32:58,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 15:32:58,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-12-02 15:32:58,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903340690] [2024-12-02 15:32:58,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 15:32:58,872 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 15:32:58,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:32:58,900 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 15:32:58,900 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 15:32:58,930 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 42 [2024-12-02 15:32:58,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 39 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:32:58,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 15:32:58,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 42 [2024-12-02 15:32:58,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 15:32:59,048 INFO L124 PetriNetUnfolderBase]: 39/106 cut-off events. [2024-12-02 15:32:59,048 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-12-02 15:32:59,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 195 conditions, 106 events. 39/106 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 349 event pairs, 22 based on Foata normal form. 1/83 useless extension candidates. Maximal degree in co-relation 150. Up to 68 conditions per place. [2024-12-02 15:32:59,051 INFO L140 encePairwiseOnDemand]: 37/42 looper letters, 18 selfloop transitions, 2 changer transitions 0/35 dead transitions. [2024-12-02 15:32:59,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 35 transitions, 122 flow [2024-12-02 15:32:59,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 15:32:59,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 15:32:59,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 77 transitions. [2024-12-02 15:32:59,065 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-12-02 15:32:59,067 INFO L175 Difference]: Start difference. First operand has 42 places, 39 transitions, 90 flow. Second operand 3 states and 77 transitions. [2024-12-02 15:32:59,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 35 transitions, 122 flow [2024-12-02 15:32:59,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 35 transitions, 114 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-12-02 15:32:59,074 INFO L231 Difference]: Finished difference. Result has 36 places, 35 transitions, 78 flow [2024-12-02 15:32:59,077 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=36, PETRI_TRANSITIONS=35} [2024-12-02 15:32:59,080 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, -6 predicate places. [2024-12-02 15:32:59,081 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 35 transitions, 78 flow [2024-12-02 15:32:59,081 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:32:59,081 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 15:32:59,081 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-12-02 15:32:59,082 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-12-02 15:32:59,082 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-12-02 15:32:59,082 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:32:59,082 INFO L85 PathProgramCache]: Analyzing trace with hash 663424, now seen corresponding path program 1 times [2024-12-02 15:32:59,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:32:59,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056873051] [2024-12-02 15:32:59,083 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 15:32:59,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:32:59,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:32:59,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 15:32:59,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:32:59,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056873051] [2024-12-02 15:32:59,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056873051] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 15:32:59,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 15:32:59,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 15:32:59,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540000730] [2024-12-02 15:32:59,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 15:32:59,289 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 15:32:59,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:32:59,290 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 15:32:59,290 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-12-02 15:32:59,341 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 42 [2024-12-02 15:32:59,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 35 transitions, 78 flow. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:32:59,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 15:32:59,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 42 [2024-12-02 15:32:59,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 15:32:59,453 INFO L124 PetriNetUnfolderBase]: 39/110 cut-off events. [2024-12-02 15:32:59,453 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-12-02 15:32:59,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 198 conditions, 110 events. 39/110 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 347 event pairs, 22 based on Foata normal form. 1/86 useless extension candidates. Maximal degree in co-relation 167. Up to 76 conditions per place. [2024-12-02 15:32:59,455 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 22 selfloop transitions, 4 changer transitions 0/39 dead transitions. [2024-12-02 15:32:59,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 39 transitions, 138 flow [2024-12-02 15:32:59,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 15:32:59,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 15:32:59,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 84 transitions. [2024-12-02 15:32:59,456 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-12-02 15:32:59,457 INFO L175 Difference]: Start difference. First operand has 36 places, 35 transitions, 78 flow. Second operand 3 states and 84 transitions. [2024-12-02 15:32:59,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 39 transitions, 138 flow [2024-12-02 15:32:59,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 39 transitions, 134 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-12-02 15:32:59,458 INFO L231 Difference]: Finished difference. Result has 37 places, 37 transitions, 100 flow [2024-12-02 15:32:59,459 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=37, PETRI_TRANSITIONS=37} [2024-12-02 15:32:59,459 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, -5 predicate places. [2024-12-02 15:32:59,459 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 37 transitions, 100 flow [2024-12-02 15:32:59,460 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:32:59,460 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 15:32:59,460 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-12-02 15:32:59,460 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-12-02 15:32:59,460 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-12-02 15:32:59,460 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:32:59,460 INFO L85 PathProgramCache]: Analyzing trace with hash 637571940, now seen corresponding path program 1 times [2024-12-02 15:32:59,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:32:59,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706803665] [2024-12-02 15:32:59,461 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 15:32:59,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:32:59,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:32:59,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 15:32:59,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:32:59,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706803665] [2024-12-02 15:32:59,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706803665] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:32:59,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248062146] [2024-12-02 15:32:59,720 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 15:32:59,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:32:59,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:32:59,722 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:32:59,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-12-02 15:32:59,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:32:59,792 INFO L256 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-12-02 15:32:59,795 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:32:59,834 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 [2024-12-02 15:32:59,902 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 15:32:59,903 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:32:59,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 15:32:59,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248062146] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 15:32:59,983 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 15:32:59,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2024-12-02 15:32:59,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004038157] [2024-12-02 15:32:59,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 15:32:59,984 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-12-02 15:32:59,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:32:59,984 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-12-02 15:32:59,985 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-12-02 15:33:00,148 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 42 [2024-12-02 15:33:00,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 37 transitions, 100 flow. Second operand has 9 states, 9 states have (on average 19.666666666666668) internal successors, (177), 9 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) [2024-12-02 15:33:00,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 15:33:00,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 42 [2024-12-02 15:33:00,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 15:33:00,386 INFO L124 PetriNetUnfolderBase]: 45/128 cut-off events. [2024-12-02 15:33:00,386 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-12-02 15:33:00,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 256 conditions, 128 events. 45/128 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 417 event pairs, 22 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 202. Up to 79 conditions per place. [2024-12-02 15:33:00,388 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 28 selfloop transitions, 16 changer transitions 0/57 dead transitions. [2024-12-02 15:33:00,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 57 transitions, 255 flow [2024-12-02 15:33:00,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 15:33:00,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-12-02 15:33:00,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-12-02 15:33:00,390 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.626984126984127 [2024-12-02 15:33:00,390 INFO L175 Difference]: Start difference. First operand has 37 places, 37 transitions, 100 flow. Second operand 6 states and 158 transitions. [2024-12-02 15:33:00,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 57 transitions, 255 flow [2024-12-02 15:33:00,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 57 transitions, 248 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-12-02 15:33:00,393 INFO L231 Difference]: Finished difference. Result has 44 places, 49 transitions, 212 flow [2024-12-02 15:33:00,393 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=212, PETRI_PLACES=44, PETRI_TRANSITIONS=49} [2024-12-02 15:33:00,394 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 2 predicate places. [2024-12-02 15:33:00,394 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 49 transitions, 212 flow [2024-12-02 15:33:00,394 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 19.666666666666668) internal successors, (177), 9 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) [2024-12-02 15:33:00,395 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 15:33:00,395 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-12-02 15:33:00,402 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-12-02 15:33:00,595 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:33:00,595 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-12-02 15:33:00,596 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:33:00,596 INFO L85 PathProgramCache]: Analyzing trace with hash 593262864, now seen corresponding path program 2 times [2024-12-02 15:33:00,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:33:00,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203100833] [2024-12-02 15:33:00,597 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 15:33:00,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:33:00,618 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 15:33:00,618 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:33:00,868 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 15:33:00,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:33:00,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203100833] [2024-12-02 15:33:00,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203100833] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:33:00,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160842676] [2024-12-02 15:33:00,868 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 15:33:00,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:33:00,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:33:00,871 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:33:00,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-12-02 15:33:00,940 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 15:33:00,940 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:33:00,941 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-12-02 15:33:00,943 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:33:00,958 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 [2024-12-02 15:33:01,165 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 15:33:01,165 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:33:01,455 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 15:33:01,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160842676] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 15:33:01,456 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 15:33:01,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 17 [2024-12-02 15:33:01,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776500931] [2024-12-02 15:33:01,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 15:33:01,456 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-12-02 15:33:01,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:33:01,457 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-12-02 15:33:01,457 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=225, Unknown=0, NotChecked=0, Total=342 [2024-12-02 15:33:01,744 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 42 [2024-12-02 15:33:01,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 49 transitions, 212 flow. Second operand has 19 states, 19 states have (on average 19.68421052631579) internal successors, (374), 19 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:33:01,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 15:33:01,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 42 [2024-12-02 15:33:01,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 15:33:02,036 INFO L124 PetriNetUnfolderBase]: 45/126 cut-off events. [2024-12-02 15:33:02,036 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2024-12-02 15:33:02,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 282 conditions, 126 events. 45/126 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 401 event pairs, 22 based on Foata normal form. 2/106 useless extension candidates. Maximal degree in co-relation 221. Up to 71 conditions per place. [2024-12-02 15:33:02,037 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 15 selfloop transitions, 27 changer transitions 0/55 dead transitions. [2024-12-02 15:33:02,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 55 transitions, 292 flow [2024-12-02 15:33:02,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-12-02 15:33:02,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-12-02 15:33:02,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 242 transitions. [2024-12-02 15:33:02,039 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-12-02 15:33:02,039 INFO L175 Difference]: Start difference. First operand has 44 places, 49 transitions, 212 flow. Second operand 11 states and 242 transitions. [2024-12-02 15:33:02,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 55 transitions, 292 flow [2024-12-02 15:33:02,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 55 transitions, 236 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-12-02 15:33:02,042 INFO L231 Difference]: Finished difference. Result has 47 places, 55 transitions, 210 flow [2024-12-02 15:33:02,042 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=210, PETRI_PLACES=47, PETRI_TRANSITIONS=55} [2024-12-02 15:33:02,043 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 5 predicate places. [2024-12-02 15:33:02,043 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 55 transitions, 210 flow [2024-12-02 15:33:02,043 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 19.68421052631579) internal successors, (374), 19 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:33:02,043 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 15:33:02,043 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:33:02,052 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-12-02 15:33:02,244 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:33:02,244 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-12-02 15:33:02,244 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:33:02,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1979087083, now seen corresponding path program 1 times [2024-12-02 15:33:02,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:33:02,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825314163] [2024-12-02 15:33:02,245 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 15:33:02,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:33:02,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:33:02,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 15:33:02,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:33:02,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825314163] [2024-12-02 15:33:02,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825314163] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:33:02,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217711341] [2024-12-02 15:33:02,350 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 15:33:02,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:33:02,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:33:02,354 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:33:02,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-12-02 15:33:02,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:33:02,428 INFO L256 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-12-02 15:33:02,429 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:33:02,457 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 15:33:02,457 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:33:02,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 15:33:02,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217711341] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 15:33:02,482 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 15:33:02,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2024-12-02 15:33:02,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821012032] [2024-12-02 15:33:02,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 15:33:02,483 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-12-02 15:33:02,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:33:02,483 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-12-02 15:33:02,484 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2024-12-02 15:33:02,501 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 42 [2024-12-02 15:33:02,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 55 transitions, 210 flow. Second operand has 8 states, 8 states have (on average 22.5) internal successors, (180), 8 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:33:02,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 15:33:02,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 42 [2024-12-02 15:33:02,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 15:33:02,598 INFO L124 PetriNetUnfolderBase]: 39/120 cut-off events. [2024-12-02 15:33:02,598 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-12-02 15:33:02,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 253 conditions, 120 events. 39/120 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 345 event pairs, 22 based on Foata normal form. 6/104 useless extension candidates. Maximal degree in co-relation 167. Up to 72 conditions per place. [2024-12-02 15:33:02,599 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 22 selfloop transitions, 14 changer transitions 0/49 dead transitions. [2024-12-02 15:33:02,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 49 transitions, 246 flow [2024-12-02 15:33:02,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 15:33:02,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-12-02 15:33:02,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-12-02 15:33:02,601 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6349206349206349 [2024-12-02 15:33:02,601 INFO L175 Difference]: Start difference. First operand has 47 places, 55 transitions, 210 flow. Second operand 6 states and 160 transitions. [2024-12-02 15:33:02,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 49 transitions, 246 flow [2024-12-02 15:33:02,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 49 transitions, 218 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-12-02 15:33:02,603 INFO L231 Difference]: Finished difference. Result has 46 places, 49 transitions, 174 flow [2024-12-02 15:33:02,603 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=174, PETRI_PLACES=46, PETRI_TRANSITIONS=49} [2024-12-02 15:33:02,603 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 4 predicate places. [2024-12-02 15:33:02,604 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 49 transitions, 174 flow [2024-12-02 15:33:02,604 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.5) internal successors, (180), 8 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:33:02,604 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 15:33:02,604 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:33:02,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-12-02 15:33:02,804 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:33:02,804 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-12-02 15:33:02,805 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:33:02,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1105380271, now seen corresponding path program 2 times [2024-12-02 15:33:02,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:33:02,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604156999] [2024-12-02 15:33:02,805 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 15:33:02,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:33:02,824 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-12-02 15:33:02,825 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:33:02,997 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-12-02 15:33:02,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:33:02,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604156999] [2024-12-02 15:33:02,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604156999] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 15:33:02,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 15:33:02,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 15:33:02,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817744537] [2024-12-02 15:33:02,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 15:33:02,997 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 15:33:02,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:33:02,998 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 15:33:02,998 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-12-02 15:33:03,073 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 42 [2024-12-02 15:33:03,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 49 transitions, 174 flow. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:33:03,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 15:33:03,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 42 [2024-12-02 15:33:03,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 15:33:03,184 INFO L124 PetriNetUnfolderBase]: 75/224 cut-off events. [2024-12-02 15:33:03,184 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-12-02 15:33:03,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 424 conditions, 224 events. 75/224 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 970 event pairs, 31 based on Foata normal form. 8/191 useless extension candidates. Maximal degree in co-relation 341. Up to 86 conditions per place. [2024-12-02 15:33:03,186 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 43 selfloop transitions, 5 changer transitions 0/60 dead transitions. [2024-12-02 15:33:03,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 60 transitions, 295 flow [2024-12-02 15:33:03,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 15:33:03,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-12-02 15:33:03,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-12-02 15:33:03,187 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-12-02 15:33:03,187 INFO L175 Difference]: Start difference. First operand has 46 places, 49 transitions, 174 flow. Second operand 6 states and 135 transitions. [2024-12-02 15:33:03,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 60 transitions, 295 flow [2024-12-02 15:33:03,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 60 transitions, 267 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-12-02 15:33:03,189 INFO L231 Difference]: Finished difference. Result has 47 places, 50 transitions, 164 flow [2024-12-02 15:33:03,189 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=164, PETRI_PLACES=47, PETRI_TRANSITIONS=50} [2024-12-02 15:33:03,190 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 5 predicate places. [2024-12-02 15:33:03,190 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 50 transitions, 164 flow [2024-12-02 15:33:03,190 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:33:03,190 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 15:33:03,190 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:33:03,191 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-12-02 15:33:03,191 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-12-02 15:33:03,191 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:33:03,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1105380270, now seen corresponding path program 1 times [2024-12-02 15:33:03,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:33:03,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790175545] [2024-12-02 15:33:03,191 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 15:33:03,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:33:03,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:33:03,348 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-12-02 15:33:03,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:33:03,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790175545] [2024-12-02 15:33:03,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790175545] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:33:03,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014600355] [2024-12-02 15:33:03,348 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 15:33:03,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:33:03,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:33:03,350 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:33:03,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-12-02 15:33:03,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:33:03,439 INFO L256 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 15:33:03,441 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:33:03,519 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-12-02 15:33:03,519 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:33:03,560 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-12-02 15:33:03,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014600355] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 15:33:03,560 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 15:33:03,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-12-02 15:33:03,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054507363] [2024-12-02 15:33:03,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 15:33:03,561 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-12-02 15:33:03,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:33:03,561 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-12-02 15:33:03,561 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2024-12-02 15:33:03,591 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 42 [2024-12-02 15:33:03,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 50 transitions, 164 flow. Second operand has 13 states, 13 states have (on average 22.153846153846153) internal successors, (288), 13 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:33:03,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 15:33:03,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 42 [2024-12-02 15:33:03,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 15:33:03,711 INFO L124 PetriNetUnfolderBase]: 64/193 cut-off events. [2024-12-02 15:33:03,711 INFO L125 PetriNetUnfolderBase]: For 40/43 co-relation queries the response was YES. [2024-12-02 15:33:03,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 405 conditions, 193 events. 64/193 cut-off events. For 40/43 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 713 event pairs, 42 based on Foata normal form. 2/159 useless extension candidates. Maximal degree in co-relation 115. Up to 118 conditions per place. [2024-12-02 15:33:03,713 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 25 selfloop transitions, 16 changer transitions 0/54 dead transitions. [2024-12-02 15:33:03,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 54 transitions, 262 flow [2024-12-02 15:33:03,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-12-02 15:33:03,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-12-02 15:33:03,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-12-02 15:33:03,715 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6011904761904762 [2024-12-02 15:33:03,715 INFO L175 Difference]: Start difference. First operand has 47 places, 50 transitions, 164 flow. Second operand 8 states and 202 transitions. [2024-12-02 15:33:03,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 54 transitions, 262 flow [2024-12-02 15:33:03,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 54 transitions, 254 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-12-02 15:33:03,717 INFO L231 Difference]: Finished difference. Result has 52 places, 54 transitions, 222 flow [2024-12-02 15:33:03,717 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=222, PETRI_PLACES=52, PETRI_TRANSITIONS=54} [2024-12-02 15:33:03,718 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 10 predicate places. [2024-12-02 15:33:03,718 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 54 transitions, 222 flow [2024-12-02 15:33:03,718 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 22.153846153846153) internal successors, (288), 13 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:33:03,718 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 15:33:03,718 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:33:03,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-12-02 15:33:03,919 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:33:03,919 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-12-02 15:33:03,919 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:33:03,919 INFO L85 PathProgramCache]: Analyzing trace with hash -833281382, now seen corresponding path program 2 times [2024-12-02 15:33:03,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:33:03,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455868641] [2024-12-02 15:33:03,919 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 15:33:03,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:33:03,932 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-12-02 15:33:03,932 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:33:03,987 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-02 15:33:03,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:33:03,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455868641] [2024-12-02 15:33:03,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455868641] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 15:33:03,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 15:33:03,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 15:33:03,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697731317] [2024-12-02 15:33:03,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 15:33:03,988 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 15:33:03,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:33:03,988 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 15:33:03,988 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 15:33:04,012 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-12-02 15:33:04,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 54 transitions, 222 flow. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:33:04,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 15:33:04,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-12-02 15:33:04,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 15:33:04,088 INFO L124 PetriNetUnfolderBase]: 86/237 cut-off events. [2024-12-02 15:33:04,088 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-12-02 15:33:04,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 510 conditions, 237 events. 86/237 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 935 event pairs, 60 based on Foata normal form. 0/209 useless extension candidates. Maximal degree in co-relation 403. Up to 151 conditions per place. [2024-12-02 15:33:04,090 INFO L140 encePairwiseOnDemand]: 37/42 looper letters, 39 selfloop transitions, 3 changer transitions 0/52 dead transitions. [2024-12-02 15:33:04,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 52 transitions, 302 flow [2024-12-02 15:33:04,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 15:33:04,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-02 15:33:04,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 98 transitions. [2024-12-02 15:33:04,091 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-12-02 15:33:04,091 INFO L175 Difference]: Start difference. First operand has 52 places, 54 transitions, 222 flow. Second operand 5 states and 98 transitions. [2024-12-02 15:33:04,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 52 transitions, 302 flow [2024-12-02 15:33:04,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 52 transitions, 286 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-12-02 15:33:04,094 INFO L231 Difference]: Finished difference. Result has 50 places, 52 transitions, 208 flow [2024-12-02 15:33:04,094 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=208, PETRI_PLACES=50, PETRI_TRANSITIONS=52} [2024-12-02 15:33:04,095 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 8 predicate places. [2024-12-02 15:33:04,095 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 52 transitions, 208 flow [2024-12-02 15:33:04,095 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:33:04,095 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 15:33:04,095 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:33:04,095 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-12-02 15:33:04,096 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-12-02 15:33:04,096 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:33:04,096 INFO L85 PathProgramCache]: Analyzing trace with hash -61918442, now seen corresponding path program 1 times [2024-12-02 15:33:04,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:33:04,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366074169] [2024-12-02 15:33:04,096 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 15:33:04,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:33:04,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:33:04,185 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-12-02 15:33:04,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:33:04,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366074169] [2024-12-02 15:33:04,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366074169] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 15:33:04,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 15:33:04,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 15:33:04,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002486504] [2024-12-02 15:33:04,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 15:33:04,186 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 15:33:04,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:33:04,187 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 15:33:04,187 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 15:33:04,220 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-12-02 15:33:04,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 52 transitions, 208 flow. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:33:04,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 15:33:04,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-12-02 15:33:04,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 15:33:04,288 INFO L124 PetriNetUnfolderBase]: 81/199 cut-off events. [2024-12-02 15:33:04,288 INFO L125 PetriNetUnfolderBase]: For 31/36 co-relation queries the response was YES. [2024-12-02 15:33:04,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 457 conditions, 199 events. 81/199 cut-off events. For 31/36 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 668 event pairs, 57 based on Foata normal form. 14/202 useless extension candidates. Maximal degree in co-relation 355. Up to 142 conditions per place. [2024-12-02 15:33:04,289 INFO L140 encePairwiseOnDemand]: 38/42 looper letters, 40 selfloop transitions, 2 changer transitions 0/50 dead transitions. [2024-12-02 15:33:04,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 50 transitions, 288 flow [2024-12-02 15:33:04,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 15:33:04,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 15:33:04,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 83 transitions. [2024-12-02 15:33:04,290 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49404761904761907 [2024-12-02 15:33:04,290 INFO L175 Difference]: Start difference. First operand has 50 places, 52 transitions, 208 flow. Second operand 4 states and 83 transitions. [2024-12-02 15:33:04,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 50 transitions, 288 flow [2024-12-02 15:33:04,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 50 transitions, 283 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-12-02 15:33:04,293 INFO L231 Difference]: Finished difference. Result has 48 places, 50 transitions, 203 flow [2024-12-02 15:33:04,293 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=203, PETRI_PLACES=48, PETRI_TRANSITIONS=50} [2024-12-02 15:33:04,294 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 6 predicate places. [2024-12-02 15:33:04,294 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 50 transitions, 203 flow [2024-12-02 15:33:04,294 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:33:04,294 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 15:33:04,294 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:33:04,294 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-12-02 15:33:04,294 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-12-02 15:33:04,295 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:33:04,295 INFO L85 PathProgramCache]: Analyzing trace with hash -61918441, now seen corresponding path program 1 times [2024-12-02 15:33:04,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:33:04,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209322270] [2024-12-02 15:33:04,295 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 15:33:04,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:33:04,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:33:04,608 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-12-02 15:33:04,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:33:04,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209322270] [2024-12-02 15:33:04,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209322270] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:33:04,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462079084] [2024-12-02 15:33:04,609 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 15:33:04,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:33:04,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:33:04,611 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:33:04,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-12-02 15:33:04,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:33:04,708 INFO L256 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-12-02 15:33:04,709 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:33:04,859 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-12-02 15:33:04,859 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:33:04,936 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 22 treesize of output 18 [2024-12-02 15:33:05,043 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-12-02 15:33:05,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462079084] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 15:33:05,044 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 15:33:05,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-12-02 15:33:05,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475520899] [2024-12-02 15:33:05,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 15:33:05,044 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-12-02 15:33:05,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:33:05,045 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-12-02 15:33:05,046 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2024-12-02 15:33:05,412 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-12-02 15:33:05,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 50 transitions, 203 flow. Second operand has 25 states, 25 states have (on average 20.88) internal successors, (522), 25 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:33:05,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 15:33:05,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-12-02 15:33:05,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 15:33:05,735 INFO L124 PetriNetUnfolderBase]: 100/265 cut-off events. [2024-12-02 15:33:05,735 INFO L125 PetriNetUnfolderBase]: For 31/34 co-relation queries the response was YES. [2024-12-02 15:33:05,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 572 conditions, 265 events. 100/265 cut-off events. For 31/34 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 990 event pairs, 31 based on Foata normal form. 16/264 useless extension candidates. Maximal degree in co-relation 471. Up to 86 conditions per place. [2024-12-02 15:33:05,737 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 49 selfloop transitions, 14 changer transitions 0/71 dead transitions. [2024-12-02 15:33:05,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 71 transitions, 379 flow [2024-12-02 15:33:05,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-12-02 15:33:05,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-12-02 15:33:05,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 251 transitions. [2024-12-02 15:33:05,738 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5976190476190476 [2024-12-02 15:33:05,739 INFO L175 Difference]: Start difference. First operand has 48 places, 50 transitions, 203 flow. Second operand 10 states and 251 transitions. [2024-12-02 15:33:05,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 71 transitions, 379 flow [2024-12-02 15:33:05,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 71 transitions, 376 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-12-02 15:33:05,741 INFO L231 Difference]: Finished difference. Result has 57 places, 51 transitions, 242 flow [2024-12-02 15:33:05,741 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=242, PETRI_PLACES=57, PETRI_TRANSITIONS=51} [2024-12-02 15:33:05,741 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 15 predicate places. [2024-12-02 15:33:05,742 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 51 transitions, 242 flow [2024-12-02 15:33:05,742 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 20.88) internal successors, (522), 25 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:33:05,742 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 15:33:05,742 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:33:05,749 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-12-02 15:33:05,943 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-12-02 15:33:05,943 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-12-02 15:33:05,943 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:33:05,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1950269043, now seen corresponding path program 1 times [2024-12-02 15:33:05,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:33:05,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050708719] [2024-12-02 15:33:05,943 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 15:33:05,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:33:05,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:33:06,281 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-12-02 15:33:06,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:33:06,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050708719] [2024-12-02 15:33:06,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050708719] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:33:06,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676978105] [2024-12-02 15:33:06,281 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 15:33:06,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:33:06,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:33:06,283 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:33:06,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-12-02 15:33:06,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:33:06,395 INFO L256 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-12-02 15:33:06,396 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:33:06,538 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-12-02 15:33:06,539 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:33:06,610 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 22 treesize of output 18 [2024-12-02 15:33:06,716 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-12-02 15:33:06,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676978105] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 15:33:06,716 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 15:33:06,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-12-02 15:33:06,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103456075] [2024-12-02 15:33:06,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 15:33:06,717 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-12-02 15:33:06,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:33:06,717 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-12-02 15:33:06,718 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2024-12-02 15:33:07,083 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 42 [2024-12-02 15:33:07,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 51 transitions, 242 flow. Second operand has 25 states, 25 states have (on average 20.12) internal successors, (503), 25 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:33:07,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 15:33:07,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 42 [2024-12-02 15:33:07,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 15:33:07,439 INFO L124 PetriNetUnfolderBase]: 257/586 cut-off events. [2024-12-02 15:33:07,439 INFO L125 PetriNetUnfolderBase]: For 433/482 co-relation queries the response was YES. [2024-12-02 15:33:07,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1370 conditions, 586 events. 257/586 cut-off events. For 433/482 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2867 event pairs, 84 based on Foata normal form. 0/556 useless extension candidates. Maximal degree in co-relation 1258. Up to 183 conditions per place. [2024-12-02 15:33:07,442 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 52 selfloop transitions, 15 changer transitions 0/74 dead transitions. [2024-12-02 15:33:07,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 74 transitions, 466 flow [2024-12-02 15:33:07,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-12-02 15:33:07,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-12-02 15:33:07,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 239 transitions. [2024-12-02 15:33:07,444 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.569047619047619 [2024-12-02 15:33:07,444 INFO L175 Difference]: Start difference. First operand has 57 places, 51 transitions, 242 flow. Second operand 10 states and 239 transitions. [2024-12-02 15:33:07,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 74 transitions, 466 flow [2024-12-02 15:33:07,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 74 transitions, 432 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-12-02 15:33:07,445 INFO L231 Difference]: Finished difference. Result has 61 places, 53 transitions, 265 flow [2024-12-02 15:33:07,446 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=265, PETRI_PLACES=61, PETRI_TRANSITIONS=53} [2024-12-02 15:33:07,446 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 19 predicate places. [2024-12-02 15:33:07,446 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 53 transitions, 265 flow [2024-12-02 15:33:07,446 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 20.12) internal successors, (503), 25 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:33:07,446 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 15:33:07,447 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:33:07,453 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-12-02 15:33:07,647 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-12-02 15:33:07,647 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-12-02 15:33:07,647 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:33:07,647 INFO L85 PathProgramCache]: Analyzing trace with hash -328797586, now seen corresponding path program 1 times [2024-12-02 15:33:07,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:33:07,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651093853] [2024-12-02 15:33:07,648 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 15:33:07,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:33:07,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:33:07,989 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-12-02 15:33:07,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:33:07,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651093853] [2024-12-02 15:33:07,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651093853] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:33:07,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791989167] [2024-12-02 15:33:07,990 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 15:33:07,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:33:07,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:33:07,992 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:33:07,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-12-02 15:33:08,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:33:08,099 INFO L256 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-12-02 15:33:08,101 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:33:08,105 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 [2024-12-02 15:33:08,171 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-12-02 15:33:08,171 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-12-02 15:33:08,489 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-12-02 15:33:08,489 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:33:08,817 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-12-02 15:33:08,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791989167] provided 1 perfect and 1 imperfect interpolant sequences [2024-12-02 15:33:08,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-12-02 15:33:08,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5, 9] total 22 [2024-12-02 15:33:08,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209007093] [2024-12-02 15:33:08,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 15:33:08,818 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-12-02 15:33:08,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:33:08,819 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-12-02 15:33:08,819 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2024-12-02 15:33:08,965 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-12-02 15:33:08,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 53 transitions, 265 flow. Second operand has 10 states, 10 states have (on average 21.0) internal successors, (210), 10 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:33:08,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 15:33:08,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-12-02 15:33:08,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 15:33:09,102 INFO L124 PetriNetUnfolderBase]: 206/516 cut-off events. [2024-12-02 15:33:09,102 INFO L125 PetriNetUnfolderBase]: For 390/427 co-relation queries the response was YES. [2024-12-02 15:33:09,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1317 conditions, 516 events. 206/516 cut-off events. For 390/427 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2515 event pairs, 128 based on Foata normal form. 17/521 useless extension candidates. Maximal degree in co-relation 1202. Up to 271 conditions per place. [2024-12-02 15:33:09,104 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 49 selfloop transitions, 5 changer transitions 0/63 dead transitions. [2024-12-02 15:33:09,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 63 transitions, 411 flow [2024-12-02 15:33:09,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 15:33:09,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-12-02 15:33:09,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-12-02 15:33:09,105 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5753968253968254 [2024-12-02 15:33:09,105 INFO L175 Difference]: Start difference. First operand has 61 places, 53 transitions, 265 flow. Second operand 6 states and 145 transitions. [2024-12-02 15:33:09,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 63 transitions, 411 flow [2024-12-02 15:33:09,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 63 transitions, 390 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-12-02 15:33:09,107 INFO L231 Difference]: Finished difference. Result has 61 places, 53 transitions, 258 flow [2024-12-02 15:33:09,108 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=258, PETRI_PLACES=61, PETRI_TRANSITIONS=53} [2024-12-02 15:33:09,108 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 19 predicate places. [2024-12-02 15:33:09,108 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 53 transitions, 258 flow [2024-12-02 15:33:09,108 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 21.0) internal successors, (210), 10 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:33:09,108 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 15:33:09,109 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:33:09,115 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-12-02 15:33:09,309 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-12-02 15:33:09,309 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-12-02 15:33:09,310 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:33:09,310 INFO L85 PathProgramCache]: Analyzing trace with hash 625942108, now seen corresponding path program 1 times [2024-12-02 15:33:09,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:33:09,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206030850] [2024-12-02 15:33:09,310 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 15:33:09,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:33:09,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:33:09,640 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-12-02 15:33:09,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:33:09,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206030850] [2024-12-02 15:33:09,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206030850] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:33:09,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680419103] [2024-12-02 15:33:09,640 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 15:33:09,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:33:09,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:33:09,642 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:33:09,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-12-02 15:33:09,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:33:09,755 INFO L256 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-12-02 15:33:09,757 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:33:09,765 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 [2024-12-02 15:33:09,770 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 8 treesize of output 1 [2024-12-02 15:33:09,853 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-12-02 15:33:09,853 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 [2024-12-02 15:33:09,864 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 14 treesize of output 9 [2024-12-02 15:33:10,257 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-12-02 15:33:10,257 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:33:10,638 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-12-02 15:33:10,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680419103] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 15:33:10,638 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 15:33:10,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 24 [2024-12-02 15:33:10,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840028928] [2024-12-02 15:33:10,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 15:33:10,639 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-12-02 15:33:10,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:33:10,640 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-12-02 15:33:10,640 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=486, Unknown=0, NotChecked=0, Total=650 [2024-12-02 15:33:11,416 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-12-02 15:33:11,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 53 transitions, 258 flow. Second operand has 26 states, 26 states have (on average 18.115384615384617) internal successors, (471), 26 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:33:11,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 15:33:11,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-12-02 15:33:11,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 15:33:12,036 INFO L124 PetriNetUnfolderBase]: 375/876 cut-off events. [2024-12-02 15:33:12,036 INFO L125 PetriNetUnfolderBase]: For 886/911 co-relation queries the response was YES. [2024-12-02 15:33:12,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2284 conditions, 876 events. 375/876 cut-off events. For 886/911 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4748 event pairs, 75 based on Foata normal form. 48/914 useless extension candidates. Maximal degree in co-relation 2176. Up to 153 conditions per place. [2024-12-02 15:33:12,039 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 81 selfloop transitions, 13 changer transitions 0/102 dead transitions. [2024-12-02 15:33:12,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 102 transitions, 632 flow [2024-12-02 15:33:12,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-12-02 15:33:12,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-12-02 15:33:12,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 288 transitions. [2024-12-02 15:33:12,042 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5274725274725275 [2024-12-02 15:33:12,042 INFO L175 Difference]: Start difference. First operand has 61 places, 53 transitions, 258 flow. Second operand 13 states and 288 transitions. [2024-12-02 15:33:12,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 102 transitions, 632 flow [2024-12-02 15:33:12,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 102 transitions, 604 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-12-02 15:33:12,044 INFO L231 Difference]: Finished difference. Result has 72 places, 55 transitions, 299 flow [2024-12-02 15:33:12,045 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=299, PETRI_PLACES=72, PETRI_TRANSITIONS=55} [2024-12-02 15:33:12,045 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 30 predicate places. [2024-12-02 15:33:12,045 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 55 transitions, 299 flow [2024-12-02 15:33:12,045 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 18.115384615384617) internal successors, (471), 26 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:33:12,045 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 15:33:12,046 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:33:12,055 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-12-02 15:33:12,246 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-12-02 15:33:12,246 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-12-02 15:33:12,246 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:33:12,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1612201896, now seen corresponding path program 1 times [2024-12-02 15:33:12,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:33:12,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146008578] [2024-12-02 15:33:12,247 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 15:33:12,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:33:12,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:33:12,507 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-12-02 15:33:12,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:33:12,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146008578] [2024-12-02 15:33:12,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146008578] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:33:12,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302424863] [2024-12-02 15:33:12,508 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 15:33:12,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:33:12,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:33:12,509 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:33:12,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-12-02 15:33:12,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:33:12,629 INFO L256 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-12-02 15:33:12,631 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:33:12,636 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 [2024-12-02 15:33:12,640 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 8 treesize of output 1 [2024-12-02 15:33:12,722 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-12-02 15:33:12,722 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 [2024-12-02 15:33:12,732 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 14 treesize of output 9 [2024-12-02 15:33:13,107 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-12-02 15:33:13,108 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:33:13,494 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 25 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-12-02 15:33:13,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302424863] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 15:33:13,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 15:33:13,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 24 [2024-12-02 15:33:13,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170953972] [2024-12-02 15:33:13,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 15:33:13,495 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-12-02 15:33:13,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:33:13,495 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-12-02 15:33:13,496 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=486, Unknown=0, NotChecked=0, Total=650 [2024-12-02 15:33:14,273 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 42 [2024-12-02 15:33:14,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 55 transitions, 299 flow. Second operand has 26 states, 26 states have (on average 19.23076923076923) internal successors, (500), 26 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:33:14,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 15:33:14,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 42 [2024-12-02 15:33:14,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 15:33:14,900 INFO L124 PetriNetUnfolderBase]: 457/1263 cut-off events. [2024-12-02 15:33:14,900 INFO L125 PetriNetUnfolderBase]: For 1774/1833 co-relation queries the response was YES. [2024-12-02 15:33:14,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3452 conditions, 1263 events. 457/1263 cut-off events. For 1774/1833 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 8044 event pairs, 138 based on Foata normal form. 81/1326 useless extension candidates. Maximal degree in co-relation 3336. Up to 306 conditions per place. [2024-12-02 15:33:14,906 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 80 selfloop transitions, 12 changer transitions 0/102 dead transitions. [2024-12-02 15:33:14,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 102 transitions, 741 flow [2024-12-02 15:33:14,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-12-02 15:33:14,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-12-02 15:33:14,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 289 transitions. [2024-12-02 15:33:14,908 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5293040293040293 [2024-12-02 15:33:14,908 INFO L175 Difference]: Start difference. First operand has 72 places, 55 transitions, 299 flow. Second operand 13 states and 289 transitions. [2024-12-02 15:33:14,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 102 transitions, 741 flow [2024-12-02 15:33:14,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 102 transitions, 698 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-12-02 15:33:14,912 INFO L231 Difference]: Finished difference. Result has 83 places, 58 transitions, 344 flow [2024-12-02 15:33:14,912 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=344, PETRI_PLACES=83, PETRI_TRANSITIONS=58} [2024-12-02 15:33:14,913 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 41 predicate places. [2024-12-02 15:33:14,913 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 58 transitions, 344 flow [2024-12-02 15:33:14,913 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 19.23076923076923) internal successors, (500), 26 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:33:14,913 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 15:33:14,913 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2024-12-02 15:33:14,920 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-12-02 15:33:15,113 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-12-02 15:33:15,114 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-12-02 15:33:15,114 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:33:15,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1833377097, now seen corresponding path program 1 times [2024-12-02 15:33:15,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:33:15,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289304932] [2024-12-02 15:33:15,114 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 15:33:15,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:33:15,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:33:15,492 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-12-02 15:33:15,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:33:15,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289304932] [2024-12-02 15:33:15,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289304932] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:33:15,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155598351] [2024-12-02 15:33:15,492 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 15:33:15,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:33:15,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:33:15,495 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:33:15,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-12-02 15:33:15,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:33:15,617 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-12-02 15:33:15,620 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:33:15,626 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 8 treesize of output 1 [2024-12-02 15:33:15,820 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-12-02 15:33:15,820 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:33:16,108 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-12-02 15:33:16,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155598351] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 15:33:16,109 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 15:33:16,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2024-12-02 15:33:16,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570804207] [2024-12-02 15:33:16,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 15:33:16,109 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-12-02 15:33:16,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:33:16,110 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-12-02 15:33:16,110 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=791, Unknown=0, NotChecked=0, Total=992 [2024-12-02 15:33:16,566 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 42 [2024-12-02 15:33:16,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 58 transitions, 344 flow. Second operand has 32 states, 32 states have (on average 18.6875) internal successors, (598), 32 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:33:16,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 15:33:16,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 42 [2024-12-02 15:33:16,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 15:33:17,110 INFO L124 PetriNetUnfolderBase]: 559/1430 cut-off events. [2024-12-02 15:33:17,110 INFO L125 PetriNetUnfolderBase]: For 2774/2796 co-relation queries the response was YES. [2024-12-02 15:33:17,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4205 conditions, 1430 events. 559/1430 cut-off events. For 2774/2796 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 8949 event pairs, 119 based on Foata normal form. 72/1476 useless extension candidates. Maximal degree in co-relation 4081. Up to 270 conditions per place. [2024-12-02 15:33:17,117 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 103 selfloop transitions, 17 changer transitions 0/130 dead transitions. [2024-12-02 15:33:17,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 130 transitions, 975 flow [2024-12-02 15:33:17,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-12-02 15:33:17,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-12-02 15:33:17,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 316 transitions. [2024-12-02 15:33:17,118 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5787545787545788 [2024-12-02 15:33:17,118 INFO L175 Difference]: Start difference. First operand has 83 places, 58 transitions, 344 flow. Second operand 13 states and 316 transitions. [2024-12-02 15:33:17,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 130 transitions, 975 flow [2024-12-02 15:33:17,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 130 transitions, 948 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-12-02 15:33:17,123 INFO L231 Difference]: Finished difference. Result has 90 places, 60 transitions, 391 flow [2024-12-02 15:33:17,123 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=391, PETRI_PLACES=90, PETRI_TRANSITIONS=60} [2024-12-02 15:33:17,123 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 48 predicate places. [2024-12-02 15:33:17,123 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 60 transitions, 391 flow [2024-12-02 15:33:17,124 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 18.6875) internal successors, (598), 32 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:33:17,124 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 15:33:17,124 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:33:17,133 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-12-02 15:33:17,324 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-12-02 15:33:17,325 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-12-02 15:33:17,325 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:33:17,325 INFO L85 PathProgramCache]: Analyzing trace with hash 890294479, now seen corresponding path program 1 times [2024-12-02 15:33:17,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:33:17,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945461538] [2024-12-02 15:33:17,325 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 15:33:17,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:33:17,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:33:17,468 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-02 15:33:17,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:33:17,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945461538] [2024-12-02 15:33:17,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945461538] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 15:33:17,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 15:33:17,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 15:33:17,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684774042] [2024-12-02 15:33:17,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 15:33:17,469 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 15:33:17,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:33:17,469 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 15:33:17,469 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-12-02 15:33:17,479 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 42 [2024-12-02 15:33:17,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 60 transitions, 391 flow. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:33:17,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 15:33:17,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 42 [2024-12-02 15:33:17,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 15:33:17,737 INFO L124 PetriNetUnfolderBase]: 522/1406 cut-off events. [2024-12-02 15:33:17,738 INFO L125 PetriNetUnfolderBase]: For 3061/3101 co-relation queries the response was YES. [2024-12-02 15:33:17,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4348 conditions, 1406 events. 522/1406 cut-off events. For 3061/3101 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 9078 event pairs, 380 based on Foata normal form. 2/1372 useless extension candidates. Maximal degree in co-relation 4217. Up to 822 conditions per place. [2024-12-02 15:33:17,750 INFO L140 encePairwiseOnDemand]: 38/42 looper letters, 68 selfloop transitions, 3 changer transitions 0/82 dead transitions. [2024-12-02 15:33:17,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 82 transitions, 689 flow [2024-12-02 15:33:17,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 15:33:17,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 15:33:17,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 114 transitions. [2024-12-02 15:33:17,751 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6785714285714286 [2024-12-02 15:33:17,751 INFO L175 Difference]: Start difference. First operand has 90 places, 60 transitions, 391 flow. Second operand 4 states and 114 transitions. [2024-12-02 15:33:17,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 82 transitions, 689 flow [2024-12-02 15:33:17,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 82 transitions, 639 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-12-02 15:33:17,758 INFO L231 Difference]: Finished difference. Result has 86 places, 61 transitions, 376 flow [2024-12-02 15:33:17,758 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=360, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=376, PETRI_PLACES=86, PETRI_TRANSITIONS=61} [2024-12-02 15:33:17,759 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 44 predicate places. [2024-12-02 15:33:17,759 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 61 transitions, 376 flow [2024-12-02 15:33:17,759 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:33:17,759 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 15:33:17,759 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:33:17,759 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-12-02 15:33:17,759 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-12-02 15:33:17,760 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:33:17,760 INFO L85 PathProgramCache]: Analyzing trace with hash -635438449, now seen corresponding path program 2 times [2024-12-02 15:33:17,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:33:17,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158545187] [2024-12-02 15:33:17,760 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 15:33:17,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:33:17,776 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-12-02 15:33:17,776 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:33:17,863 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-02 15:33:17,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:33:17,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158545187] [2024-12-02 15:33:17,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158545187] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 15:33:17,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 15:33:17,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 15:33:17,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695990103] [2024-12-02 15:33:17,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 15:33:17,864 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 15:33:17,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:33:17,864 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 15:33:17,864 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 15:33:17,878 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 42 [2024-12-02 15:33:17,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 61 transitions, 376 flow. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:33:17,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 15:33:17,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 42 [2024-12-02 15:33:17,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 15:33:18,173 INFO L124 PetriNetUnfolderBase]: 519/1355 cut-off events. [2024-12-02 15:33:18,173 INFO L125 PetriNetUnfolderBase]: For 3297/3354 co-relation queries the response was YES. [2024-12-02 15:33:18,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4472 conditions, 1355 events. 519/1355 cut-off events. For 3297/3354 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 8529 event pairs, 349 based on Foata normal form. 3/1315 useless extension candidates. Maximal degree in co-relation 4349. Up to 838 conditions per place. [2024-12-02 15:33:18,186 INFO L140 encePairwiseOnDemand]: 38/42 looper letters, 70 selfloop transitions, 3 changer transitions 2/86 dead transitions. [2024-12-02 15:33:18,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 86 transitions, 679 flow [2024-12-02 15:33:18,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 15:33:18,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 15:33:18,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 117 transitions. [2024-12-02 15:33:18,187 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6964285714285714 [2024-12-02 15:33:18,187 INFO L175 Difference]: Start difference. First operand has 86 places, 61 transitions, 376 flow. Second operand 4 states and 117 transitions. [2024-12-02 15:33:18,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 86 transitions, 679 flow [2024-12-02 15:33:18,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 86 transitions, 669 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-12-02 15:33:18,194 INFO L231 Difference]: Finished difference. Result has 89 places, 62 transitions, 388 flow [2024-12-02 15:33:18,194 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=388, PETRI_PLACES=89, PETRI_TRANSITIONS=62} [2024-12-02 15:33:18,194 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 47 predicate places. [2024-12-02 15:33:18,194 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 62 transitions, 388 flow [2024-12-02 15:33:18,194 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:33:18,195 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 15:33:18,195 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:33:18,195 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-12-02 15:33:18,195 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-12-02 15:33:18,195 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:33:18,195 INFO L85 PathProgramCache]: Analyzing trace with hash 32609241, now seen corresponding path program 3 times [2024-12-02 15:33:18,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:33:18,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037669532] [2024-12-02 15:33:18,196 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 15:33:18,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:33:18,214 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-12-02 15:33:18,215 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:33:18,310 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-02 15:33:18,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:33:18,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037669532] [2024-12-02 15:33:18,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037669532] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 15:33:18,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 15:33:18,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 15:33:18,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714365254] [2024-12-02 15:33:18,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 15:33:18,311 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 15:33:18,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:33:18,311 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 15:33:18,312 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 15:33:18,325 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-12-02 15:33:18,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 62 transitions, 388 flow. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:33:18,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 15:33:18,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-12-02 15:33:18,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 15:33:18,594 INFO L124 PetriNetUnfolderBase]: 786/1802 cut-off events. [2024-12-02 15:33:18,594 INFO L125 PetriNetUnfolderBase]: For 4721/4781 co-relation queries the response was YES. [2024-12-02 15:33:18,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6137 conditions, 1802 events. 786/1802 cut-off events. For 4721/4781 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 11307 event pairs, 552 based on Foata normal form. 30/1819 useless extension candidates. Maximal degree in co-relation 6012. Up to 1130 conditions per place. [2024-12-02 15:33:18,604 INFO L140 encePairwiseOnDemand]: 37/42 looper letters, 74 selfloop transitions, 4 changer transitions 0/88 dead transitions. [2024-12-02 15:33:18,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 88 transitions, 723 flow [2024-12-02 15:33:18,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 15:33:18,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 15:33:18,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 114 transitions. [2024-12-02 15:33:18,606 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6785714285714286 [2024-12-02 15:33:18,606 INFO L175 Difference]: Start difference. First operand has 89 places, 62 transitions, 388 flow. Second operand 4 states and 114 transitions. [2024-12-02 15:33:18,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 88 transitions, 723 flow [2024-12-02 15:33:18,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 88 transitions, 711 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-12-02 15:33:18,613 INFO L231 Difference]: Finished difference. Result has 92 places, 64 transitions, 417 flow [2024-12-02 15:33:18,613 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=417, PETRI_PLACES=92, PETRI_TRANSITIONS=64} [2024-12-02 15:33:18,613 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 50 predicate places. [2024-12-02 15:33:18,613 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 64 transitions, 417 flow [2024-12-02 15:33:18,613 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:33:18,613 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 15:33:18,613 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:33:18,613 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-12-02 15:33:18,614 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-12-02 15:33:18,614 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:33:18,614 INFO L85 PathProgramCache]: Analyzing trace with hash 588630785, now seen corresponding path program 4 times [2024-12-02 15:33:18,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:33:18,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467040933] [2024-12-02 15:33:18,614 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 15:33:18,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:33:18,633 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 15:33:18,633 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:33:18,713 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-02 15:33:18,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:33:18,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467040933] [2024-12-02 15:33:18,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467040933] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 15:33:18,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 15:33:18,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 15:33:18,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996138949] [2024-12-02 15:33:18,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 15:33:18,713 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 15:33:18,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:33:18,714 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 15:33:18,714 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 15:33:18,723 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 42 [2024-12-02 15:33:18,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 64 transitions, 417 flow. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:33:18,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 15:33:18,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 42 [2024-12-02 15:33:18,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 15:33:18,947 INFO L124 PetriNetUnfolderBase]: 543/1610 cut-off events. [2024-12-02 15:33:18,947 INFO L125 PetriNetUnfolderBase]: For 4761/4791 co-relation queries the response was YES. [2024-12-02 15:33:18,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5731 conditions, 1610 events. 543/1610 cut-off events. For 4761/4791 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 11006 event pairs, 234 based on Foata normal form. 30/1637 useless extension candidates. Maximal degree in co-relation 5604. Up to 916 conditions per place. [2024-12-02 15:33:18,955 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 66 selfloop transitions, 6 changer transitions 1/85 dead transitions. [2024-12-02 15:33:18,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 85 transitions, 721 flow [2024-12-02 15:33:18,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 15:33:18,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 15:33:18,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 112 transitions. [2024-12-02 15:33:18,956 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-12-02 15:33:18,956 INFO L175 Difference]: Start difference. First operand has 92 places, 64 transitions, 417 flow. Second operand 4 states and 112 transitions. [2024-12-02 15:33:18,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 85 transitions, 721 flow [2024-12-02 15:33:18,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 85 transitions, 714 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-12-02 15:33:18,963 INFO L231 Difference]: Finished difference. Result has 96 places, 65 transitions, 454 flow [2024-12-02 15:33:18,963 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=413, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=454, PETRI_PLACES=96, PETRI_TRANSITIONS=65} [2024-12-02 15:33:18,963 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 54 predicate places. [2024-12-02 15:33:18,963 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 65 transitions, 454 flow [2024-12-02 15:33:18,963 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:33:18,964 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 15:33:18,964 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:33:18,964 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-12-02 15:33:18,964 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-12-02 15:33:18,964 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:33:18,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1157149747, now seen corresponding path program 1 times [2024-12-02 15:33:18,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:33:18,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95090059] [2024-12-02 15:33:18,964 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 15:33:18,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:33:18,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:33:19,280 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 12 proven. 20 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-12-02 15:33:19,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:33:19,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95090059] [2024-12-02 15:33:19,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95090059] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:33:19,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283192423] [2024-12-02 15:33:19,280 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 15:33:19,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:33:19,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:33:19,282 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:33:19,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-12-02 15:33:19,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:33:19,406 INFO L256 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-12-02 15:33:19,408 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:33:19,587 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-12-02 15:33:19,587 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:33:19,702 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 24 treesize of output 20 [2024-12-02 15:33:19,815 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-12-02 15:33:19,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283192423] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 15:33:19,815 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 15:33:19,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2024-12-02 15:33:19,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510017868] [2024-12-02 15:33:19,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 15:33:19,816 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-12-02 15:33:19,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:33:19,816 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-12-02 15:33:19,817 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2024-12-02 15:33:20,433 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 42 [2024-12-02 15:33:20,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 65 transitions, 454 flow. Second operand has 32 states, 32 states have (on average 20.0625) internal successors, (642), 32 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:33:20,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 15:33:20,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 42 [2024-12-02 15:33:20,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 15:33:21,088 INFO L124 PetriNetUnfolderBase]: 946/2096 cut-off events. [2024-12-02 15:33:21,088 INFO L125 PetriNetUnfolderBase]: For 7610/7665 co-relation queries the response was YES. [2024-12-02 15:33:21,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7662 conditions, 2096 events. 946/2096 cut-off events. For 7610/7665 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 12855 event pairs, 170 based on Foata normal form. 96/2163 useless extension candidates. Maximal degree in co-relation 7532. Up to 344 conditions per place. [2024-12-02 15:33:21,097 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 107 selfloop transitions, 20 changer transitions 0/136 dead transitions. [2024-12-02 15:33:21,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 136 transitions, 1186 flow [2024-12-02 15:33:21,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-12-02 15:33:21,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-12-02 15:33:21,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 321 transitions. [2024-12-02 15:33:21,099 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5879120879120879 [2024-12-02 15:33:21,099 INFO L175 Difference]: Start difference. First operand has 96 places, 65 transitions, 454 flow. Second operand 13 states and 321 transitions. [2024-12-02 15:33:21,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 136 transitions, 1186 flow [2024-12-02 15:33:21,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 136 transitions, 1167 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-12-02 15:33:21,111 INFO L231 Difference]: Finished difference. Result has 107 places, 66 transitions, 506 flow [2024-12-02 15:33:21,111 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=440, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=506, PETRI_PLACES=107, PETRI_TRANSITIONS=66} [2024-12-02 15:33:21,111 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 65 predicate places. [2024-12-02 15:33:21,111 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 66 transitions, 506 flow [2024-12-02 15:33:21,112 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 20.0625) internal successors, (642), 32 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:33:21,112 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 15:33:21,112 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:33:21,117 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-12-02 15:33:21,312 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:33:21,312 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-12-02 15:33:21,313 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:33:21,313 INFO L85 PathProgramCache]: Analyzing trace with hash -338582713, now seen corresponding path program 1 times [2024-12-02 15:33:21,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:33:21,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318609088] [2024-12-02 15:33:21,313 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 15:33:21,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:33:21,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:33:21,474 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-02 15:33:21,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:33:21,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318609088] [2024-12-02 15:33:21,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318609088] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 15:33:21,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 15:33:21,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 15:33:21,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263545579] [2024-12-02 15:33:21,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 15:33:21,474 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 15:33:21,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:33:21,475 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 15:33:21,475 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 15:33:21,485 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 42 [2024-12-02 15:33:21,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 66 transitions, 506 flow. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:33:21,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 15:33:21,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 42 [2024-12-02 15:33:21,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 15:33:21,766 INFO L124 PetriNetUnfolderBase]: 660/1714 cut-off events. [2024-12-02 15:33:21,766 INFO L125 PetriNetUnfolderBase]: For 7782/7840 co-relation queries the response was YES. [2024-12-02 15:33:21,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6796 conditions, 1714 events. 660/1714 cut-off events. For 7782/7840 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 11100 event pairs, 408 based on Foata normal form. 22/1711 useless extension candidates. Maximal degree in co-relation 6654. Up to 995 conditions per place. [2024-12-02 15:33:21,774 INFO L140 encePairwiseOnDemand]: 38/42 looper letters, 69 selfloop transitions, 5 changer transitions 0/87 dead transitions. [2024-12-02 15:33:21,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 87 transitions, 841 flow [2024-12-02 15:33:21,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 15:33:21,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 15:33:21,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 116 transitions. [2024-12-02 15:33:21,775 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6904761904761905 [2024-12-02 15:33:21,775 INFO L175 Difference]: Start difference. First operand has 107 places, 66 transitions, 506 flow. Second operand 4 states and 116 transitions. [2024-12-02 15:33:21,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 87 transitions, 841 flow [2024-12-02 15:33:21,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 87 transitions, 779 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-12-02 15:33:21,787 INFO L231 Difference]: Finished difference. Result has 101 places, 68 transitions, 512 flow [2024-12-02 15:33:21,788 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=466, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=512, PETRI_PLACES=101, PETRI_TRANSITIONS=68} [2024-12-02 15:33:21,788 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 59 predicate places. [2024-12-02 15:33:21,788 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 68 transitions, 512 flow [2024-12-02 15:33:21,788 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:33:21,788 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 15:33:21,788 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:33:21,788 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-12-02 15:33:21,788 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-12-02 15:33:21,789 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:33:21,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1254323391, now seen corresponding path program 2 times [2024-12-02 15:33:21,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:33:21,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124550669] [2024-12-02 15:33:21,789 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 15:33:21,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:33:21,811 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-12-02 15:33:21,811 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:33:21,892 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-02 15:33:21,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:33:21,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124550669] [2024-12-02 15:33:21,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124550669] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 15:33:21,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 15:33:21,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 15:33:21,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836693313] [2024-12-02 15:33:21,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 15:33:21,892 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 15:33:21,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:33:21,893 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 15:33:21,893 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 15:33:21,918 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 42 [2024-12-02 15:33:21,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 68 transitions, 512 flow. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:33:21,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 15:33:21,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 42 [2024-12-02 15:33:21,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 15:33:22,223 INFO L124 PetriNetUnfolderBase]: 590/1501 cut-off events. [2024-12-02 15:33:22,223 INFO L125 PetriNetUnfolderBase]: For 7271/7325 co-relation queries the response was YES. [2024-12-02 15:33:22,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5780 conditions, 1501 events. 590/1501 cut-off events. For 7271/7325 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 9595 event pairs, 296 based on Foata normal form. 26/1464 useless extension candidates. Maximal degree in co-relation 5646. Up to 943 conditions per place. [2024-12-02 15:33:22,231 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 63 selfloop transitions, 8 changer transitions 1/85 dead transitions. [2024-12-02 15:33:22,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 85 transitions, 801 flow [2024-12-02 15:33:22,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 15:33:22,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 15:33:22,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 110 transitions. [2024-12-02 15:33:22,232 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6547619047619048 [2024-12-02 15:33:22,232 INFO L175 Difference]: Start difference. First operand has 101 places, 68 transitions, 512 flow. Second operand 4 states and 110 transitions. [2024-12-02 15:33:22,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 85 transitions, 801 flow [2024-12-02 15:33:22,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 85 transitions, 793 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-12-02 15:33:22,241 INFO L231 Difference]: Finished difference. Result has 105 places, 69 transitions, 555 flow [2024-12-02 15:33:22,241 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=555, PETRI_PLACES=105, PETRI_TRANSITIONS=69} [2024-12-02 15:33:22,242 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 63 predicate places. [2024-12-02 15:33:22,242 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 69 transitions, 555 flow [2024-12-02 15:33:22,242 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:33:22,242 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 15:33:22,242 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2024-12-02 15:33:22,242 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-12-02 15:33:22,242 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-12-02 15:33:22,243 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:33:22,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1719276379, now seen corresponding path program 2 times [2024-12-02 15:33:22,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:33:22,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574906543] [2024-12-02 15:33:22,243 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 15:33:22,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:33:22,270 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 15:33:22,271 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:33:22,646 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-02 15:33:22,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:33:22,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574906543] [2024-12-02 15:33:22,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574906543] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:33:22,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714168065] [2024-12-02 15:33:22,646 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 15:33:22,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:33:22,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:33:22,648 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:33:22,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-12-02 15:33:22,756 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 15:33:22,756 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:33:22,758 INFO L256 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-12-02 15:33:22,759 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:33:22,762 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 [2024-12-02 15:33:22,803 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-12-02 15:33:22,803 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-12-02 15:33:23,180 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-12-02 15:33:23,180 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:33:23,553 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-12-02 15:33:23,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714168065] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 15:33:23,553 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 15:33:23,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 12] total 33 [2024-12-02 15:33:23,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107294920] [2024-12-02 15:33:23,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 15:33:23,554 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-12-02 15:33:23,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:33:23,555 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-12-02 15:33:23,555 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=906, Unknown=0, NotChecked=0, Total=1190 [2024-12-02 15:33:24,304 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-12-02 15:33:24,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 69 transitions, 555 flow. Second operand has 35 states, 35 states have (on average 17.428571428571427) internal successors, (610), 35 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:33:24,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 15:33:24,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-12-02 15:33:24,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 15:33:25,468 INFO L124 PetriNetUnfolderBase]: 1128/2232 cut-off events. [2024-12-02 15:33:25,468 INFO L125 PetriNetUnfolderBase]: For 11513/11599 co-relation queries the response was YES. [2024-12-02 15:33:25,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8812 conditions, 2232 events. 1128/2232 cut-off events. For 11513/11599 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 13085 event pairs, 65 based on Foata normal form. 60/2274 useless extension candidates. Maximal degree in co-relation 8661. Up to 400 conditions per place. [2024-12-02 15:33:25,478 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 134 selfloop transitions, 27 changer transitions 0/170 dead transitions. [2024-12-02 15:33:25,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 170 transitions, 1617 flow [2024-12-02 15:33:25,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-12-02 15:33:25,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-12-02 15:33:25,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 465 transitions. [2024-12-02 15:33:25,480 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4813664596273292 [2024-12-02 15:33:25,480 INFO L175 Difference]: Start difference. First operand has 105 places, 69 transitions, 555 flow. Second operand 23 states and 465 transitions. [2024-12-02 15:33:25,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 170 transitions, 1617 flow [2024-12-02 15:33:25,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 170 transitions, 1579 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-12-02 15:33:25,491 INFO L231 Difference]: Finished difference. Result has 119 places, 71 transitions, 593 flow [2024-12-02 15:33:25,491 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=513, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=593, PETRI_PLACES=119, PETRI_TRANSITIONS=71} [2024-12-02 15:33:25,491 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 77 predicate places. [2024-12-02 15:33:25,491 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 71 transitions, 593 flow [2024-12-02 15:33:25,492 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 17.428571428571427) internal successors, (610), 35 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:33:25,492 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 15:33:25,492 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:33:25,501 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-12-02 15:33:25,692 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:33:25,692 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-12-02 15:33:25,692 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:33:25,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1719931448, now seen corresponding path program 1 times [2024-12-02 15:33:25,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:33:25,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933051356] [2024-12-02 15:33:25,693 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 15:33:25,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:33:25,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:33:26,475 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-02 15:33:26,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:33:26,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933051356] [2024-12-02 15:33:26,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933051356] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:33:26,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731084584] [2024-12-02 15:33:26,476 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 15:33:26,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:33:26,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:33:26,477 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:33:26,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-12-02 15:33:26,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:33:26,590 INFO L256 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-12-02 15:33:26,591 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:33:26,717 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 15:33:26,717 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2024-12-02 15:33:26,749 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-02 15:33:26,749 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:33:43,581 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-12-02 15:33:43,582 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 50 [2024-12-02 15:33:43,619 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-02 15:33:43,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731084584] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 15:33:43,620 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 15:33:43,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 28 [2024-12-02 15:33:43,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979174837] [2024-12-02 15:33:43,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 15:33:43,620 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-12-02 15:33:43,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:33:43,621 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-12-02 15:33:43,621 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=637, Unknown=3, NotChecked=0, Total=756 [2024-12-02 15:33:47,643 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 15:33:51,793 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 15:33:55,899 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 15:34:00,048 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 15:34:04,183 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 15:34:08,379 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 15:34:12,476 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 15:34:16,561 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 15:34:20,671 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 15:34:24,704 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 15:34:24,705 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-12-02 15:34:24,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 71 transitions, 593 flow. Second operand has 28 states, 28 states have (on average 8.107142857142858) internal successors, (227), 28 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:34:24,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 15:34:24,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-12-02 15:34:24,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 15:34:25,976 INFO L124 PetriNetUnfolderBase]: 2547/4410 cut-off events. [2024-12-02 15:34:25,976 INFO L125 PetriNetUnfolderBase]: For 15408/15408 co-relation queries the response was YES. [2024-12-02 15:34:25,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17158 conditions, 4410 events. 2547/4410 cut-off events. For 15408/15408 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 23176 event pairs, 1162 based on Foata normal form. 1/4411 useless extension candidates. Maximal degree in co-relation 17046. Up to 3560 conditions per place. [2024-12-02 15:34:25,998 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 114 selfloop transitions, 24 changer transitions 1/140 dead transitions. [2024-12-02 15:34:25,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 140 transitions, 1329 flow [2024-12-02 15:34:25,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-12-02 15:34:25,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-12-02 15:34:25,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 163 transitions. [2024-12-02 15:34:25,999 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.29853479853479853 [2024-12-02 15:34:25,999 INFO L175 Difference]: Start difference. First operand has 119 places, 71 transitions, 593 flow. Second operand 13 states and 163 transitions. [2024-12-02 15:34:25,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 140 transitions, 1329 flow [2024-12-02 15:34:26,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 140 transitions, 1272 flow, removed 2 selfloop flow, removed 15 redundant places. [2024-12-02 15:34:26,014 INFO L231 Difference]: Finished difference. Result has 123 places, 85 transitions, 757 flow [2024-12-02 15:34:26,014 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=544, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=757, PETRI_PLACES=123, PETRI_TRANSITIONS=85} [2024-12-02 15:34:26,014 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 81 predicate places. [2024-12-02 15:34:26,014 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 85 transitions, 757 flow [2024-12-02 15:34:26,014 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 8.107142857142858) internal successors, (227), 28 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:34:26,015 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 15:34:26,015 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:34:26,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-12-02 15:34:26,215 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-12-02 15:34:26,215 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-12-02 15:34:26,215 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:34:26,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1851924676, now seen corresponding path program 2 times [2024-12-02 15:34:26,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:34:26,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155926790] [2024-12-02 15:34:26,216 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 15:34:26,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:34:26,236 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-12-02 15:34:26,236 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:34:26,876 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-02 15:34:26,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:34:26,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155926790] [2024-12-02 15:34:26,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155926790] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 15:34:26,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 15:34:26,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-12-02 15:34:26,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434501059] [2024-12-02 15:34:26,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 15:34:26,876 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-12-02 15:34:26,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:34:26,877 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-12-02 15:34:26,877 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2024-12-02 15:34:27,174 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 42 [2024-12-02 15:34:27,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 85 transitions, 757 flow. Second operand has 13 states, 13 states have (on average 19.692307692307693) internal successors, (256), 13 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:34:27,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 15:34:27,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 42 [2024-12-02 15:34:27,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 15:34:27,894 INFO L124 PetriNetUnfolderBase]: 1375/2902 cut-off events. [2024-12-02 15:34:27,894 INFO L125 PetriNetUnfolderBase]: For 14754/14756 co-relation queries the response was YES. [2024-12-02 15:34:27,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12714 conditions, 2902 events. 1375/2902 cut-off events. For 14754/14756 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 18146 event pairs, 571 based on Foata normal form. 1/2903 useless extension candidates. Maximal degree in co-relation 12599. Up to 1985 conditions per place. [2024-12-02 15:34:27,910 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 94 selfloop transitions, 27 changer transitions 1/130 dead transitions. [2024-12-02 15:34:27,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 130 transitions, 1322 flow [2024-12-02 15:34:27,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-12-02 15:34:27,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-12-02 15:34:27,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 266 transitions. [2024-12-02 15:34:27,911 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5757575757575758 [2024-12-02 15:34:27,911 INFO L175 Difference]: Start difference. First operand has 123 places, 85 transitions, 757 flow. Second operand 11 states and 266 transitions. [2024-12-02 15:34:27,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 130 transitions, 1322 flow [2024-12-02 15:34:27,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 130 transitions, 1299 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-12-02 15:34:27,929 INFO L231 Difference]: Finished difference. Result has 133 places, 97 transitions, 952 flow [2024-12-02 15:34:27,929 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=736, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=952, PETRI_PLACES=133, PETRI_TRANSITIONS=97} [2024-12-02 15:34:27,929 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 91 predicate places. [2024-12-02 15:34:27,929 INFO L471 AbstractCegarLoop]: Abstraction has has 133 places, 97 transitions, 952 flow [2024-12-02 15:34:27,929 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 19.692307692307693) internal successors, (256), 13 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:34:27,929 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 15:34:27,929 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:34:27,930 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-12-02 15:34:27,930 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-12-02 15:34:27,930 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:34:27,930 INFO L85 PathProgramCache]: Analyzing trace with hash -743299104, now seen corresponding path program 3 times [2024-12-02 15:34:27,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:34:27,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788681847] [2024-12-02 15:34:27,930 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 15:34:27,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:34:27,958 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-12-02 15:34:27,959 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:34:28,522 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-02 15:34:28,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:34:28,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788681847] [2024-12-02 15:34:28,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788681847] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:34:28,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982146949] [2024-12-02 15:34:28,522 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 15:34:28,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:34:28,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:34:28,524 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:34:28,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-12-02 15:34:28,637 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-12-02 15:34:28,637 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:34:28,638 INFO L256 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-12-02 15:34:28,640 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:34:28,937 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 15:34:28,937 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-12-02 15:34:28,992 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-02 15:34:28,992 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:34:29,470 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2024-12-02 15:34:29,470 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2024-12-02 15:34:29,510 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-12-02 15:34:29,510 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 58 [2024-12-02 15:34:29,557 INFO L349 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2024-12-02 15:34:29,557 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 1 [2024-12-02 15:34:29,569 INFO L349 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2024-12-02 15:34:29,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 1 [2024-12-02 15:34:29,624 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-02 15:34:29,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982146949] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 15:34:29,625 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 15:34:29,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 27 [2024-12-02 15:34:29,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189291415] [2024-12-02 15:34:29,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 15:34:29,625 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-12-02 15:34:29,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:34:29,626 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-12-02 15:34:29,626 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2024-12-02 15:34:30,603 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-12-02 15:34:30,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 97 transitions, 952 flow. Second operand has 27 states, 27 states have (on average 18.25925925925926) internal successors, (493), 27 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:34:30,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 15:34:30,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-12-02 15:34:30,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 15:34:32,586 INFO L124 PetriNetUnfolderBase]: 3423/6019 cut-off events. [2024-12-02 15:34:32,587 INFO L125 PetriNetUnfolderBase]: For 30146/30332 co-relation queries the response was YES. [2024-12-02 15:34:32,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27281 conditions, 6019 events. 3423/6019 cut-off events. For 30146/30332 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 35393 event pairs, 986 based on Foata normal form. 1/6020 useless extension candidates. Maximal degree in co-relation 27163. Up to 3424 conditions per place. [2024-12-02 15:34:32,613 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 137 selfloop transitions, 77 changer transitions 2/220 dead transitions. [2024-12-02 15:34:32,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 220 transitions, 2495 flow [2024-12-02 15:34:32,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-12-02 15:34:32,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-12-02 15:34:32,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 390 transitions. [2024-12-02 15:34:32,614 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5462184873949579 [2024-12-02 15:34:32,614 INFO L175 Difference]: Start difference. First operand has 133 places, 97 transitions, 952 flow. Second operand 17 states and 390 transitions. [2024-12-02 15:34:32,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 220 transitions, 2495 flow [2024-12-02 15:34:32,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 220 transitions, 2424 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-12-02 15:34:32,657 INFO L231 Difference]: Finished difference. Result has 152 places, 152 transitions, 1879 flow [2024-12-02 15:34:32,657 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=907, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1879, PETRI_PLACES=152, PETRI_TRANSITIONS=152} [2024-12-02 15:34:32,658 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 110 predicate places. [2024-12-02 15:34:32,658 INFO L471 AbstractCegarLoop]: Abstraction has has 152 places, 152 transitions, 1879 flow [2024-12-02 15:34:32,658 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 18.25925925925926) internal successors, (493), 27 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:34:32,658 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 15:34:32,658 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:34:32,664 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-12-02 15:34:32,858 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:34:32,859 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-12-02 15:34:32,859 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:34:32,859 INFO L85 PathProgramCache]: Analyzing trace with hash -95564076, now seen corresponding path program 4 times [2024-12-02 15:34:32,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:34:32,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975720542] [2024-12-02 15:34:32,859 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 15:34:32,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:34:32,899 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 15:34:32,900 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:34:34,399 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-12-02 15:34:34,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:34:34,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975720542] [2024-12-02 15:34:34,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975720542] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:34:34,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721356220] [2024-12-02 15:34:34,400 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 15:34:34,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:34:34,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:34:34,402 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:34:34,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-12-02 15:34:34,554 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 15:34:34,554 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:34:34,556 INFO L256 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-12-02 15:34:34,557 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:34:34,886 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 15:34:34,886 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-12-02 15:34:34,953 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-02 15:34:34,953 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:34:35,866 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-12-02 15:34:35,867 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 50 [2024-12-02 15:34:35,932 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-12-02 15:34:35,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721356220] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 15:34:35,932 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 15:34:35,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 10] total 33 [2024-12-02 15:34:35,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845218835] [2024-12-02 15:34:35,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 15:34:35,932 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-12-02 15:34:35,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:34:35,933 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-12-02 15:34:35,934 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2024-12-02 15:34:37,860 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-12-02 15:34:37,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 152 transitions, 1879 flow. Second operand has 33 states, 33 states have (on average 18.242424242424242) internal successors, (602), 33 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:34:37,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 15:34:37,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-12-02 15:34:37,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 15:34:40,906 INFO L124 PetriNetUnfolderBase]: 3552/6265 cut-off events. [2024-12-02 15:34:40,906 INFO L125 PetriNetUnfolderBase]: For 40108/40265 co-relation queries the response was YES. [2024-12-02 15:34:40,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32160 conditions, 6265 events. 3552/6265 cut-off events. For 40108/40265 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 37016 event pairs, 937 based on Foata normal form. 2/6267 useless extension candidates. Maximal degree in co-relation 32036. Up to 3542 conditions per place. [2024-12-02 15:34:40,936 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 220 selfloop transitions, 67 changer transitions 4/295 dead transitions. [2024-12-02 15:34:40,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 295 transitions, 3888 flow [2024-12-02 15:34:40,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-12-02 15:34:40,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-12-02 15:34:40,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 464 transitions. [2024-12-02 15:34:40,938 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5260770975056689 [2024-12-02 15:34:40,938 INFO L175 Difference]: Start difference. First operand has 152 places, 152 transitions, 1879 flow. Second operand 21 states and 464 transitions. [2024-12-02 15:34:40,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 295 transitions, 3888 flow [2024-12-02 15:34:41,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 295 transitions, 3754 flow, removed 54 selfloop flow, removed 3 redundant places. [2024-12-02 15:34:41,032 INFO L231 Difference]: Finished difference. Result has 180 places, 178 transitions, 2394 flow [2024-12-02 15:34:41,033 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1784, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2394, PETRI_PLACES=180, PETRI_TRANSITIONS=178} [2024-12-02 15:34:41,033 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 138 predicate places. [2024-12-02 15:34:41,033 INFO L471 AbstractCegarLoop]: Abstraction has has 180 places, 178 transitions, 2394 flow [2024-12-02 15:34:41,034 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 18.242424242424242) internal successors, (602), 33 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:34:41,034 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 15:34:41,034 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:34:41,041 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-12-02 15:34:41,234 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-12-02 15:34:41,234 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-12-02 15:34:41,235 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:34:41,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1210887948, now seen corresponding path program 5 times [2024-12-02 15:34:41,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:34:41,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734908497] [2024-12-02 15:34:41,235 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 15:34:41,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:34:41,288 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-12-02 15:34:41,289 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:34:42,486 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-12-02 15:34:42,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:34:42,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734908497] [2024-12-02 15:34:42,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734908497] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:34:42,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448103564] [2024-12-02 15:34:42,487 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 15:34:42,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:34:42,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:34:42,488 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:34:42,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-12-02 15:34:42,660 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-12-02 15:34:42,660 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:34:42,663 INFO L256 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-12-02 15:34:42,664 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:34:42,906 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 15:34:42,906 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-12-02 15:34:42,991 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-02 15:34:42,991 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 15:34:42,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448103564] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 15:34:42,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 15:34:42,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [18] total 26 [2024-12-02 15:34:42,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145472683] [2024-12-02 15:34:42,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 15:34:42,992 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-12-02 15:34:42,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:34:42,992 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-12-02 15:34:42,993 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2024-12-02 15:34:43,321 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 42 [2024-12-02 15:34:43,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 178 transitions, 2394 flow. Second operand has 13 states, 13 states have (on average 19.692307692307693) internal successors, (256), 13 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:34:43,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 15:34:43,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 42 [2024-12-02 15:34:43,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 15:34:44,325 INFO L124 PetriNetUnfolderBase]: 2383/4736 cut-off events. [2024-12-02 15:34:44,325 INFO L125 PetriNetUnfolderBase]: For 47254/47282 co-relation queries the response was YES. [2024-12-02 15:34:44,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27528 conditions, 4736 events. 2383/4736 cut-off events. For 47254/47282 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 31098 event pairs, 700 based on Foata normal form. 9/4732 useless extension candidates. Maximal degree in co-relation 27390. Up to 3291 conditions per place. [2024-12-02 15:34:44,355 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 182 selfloop transitions, 41 changer transitions 1/237 dead transitions. [2024-12-02 15:34:44,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 237 transitions, 3502 flow [2024-12-02 15:34:44,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-12-02 15:34:44,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-12-02 15:34:44,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 268 transitions. [2024-12-02 15:34:44,356 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5800865800865801 [2024-12-02 15:34:44,356 INFO L175 Difference]: Start difference. First operand has 180 places, 178 transitions, 2394 flow. Second operand 11 states and 268 transitions. [2024-12-02 15:34:44,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 237 transitions, 3502 flow [2024-12-02 15:34:44,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 237 transitions, 3245 flow, removed 64 selfloop flow, removed 10 redundant places. [2024-12-02 15:34:44,459 INFO L231 Difference]: Finished difference. Result has 182 places, 189 transitions, 2473 flow [2024-12-02 15:34:44,459 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2155, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2473, PETRI_PLACES=182, PETRI_TRANSITIONS=189} [2024-12-02 15:34:44,459 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 140 predicate places. [2024-12-02 15:34:44,459 INFO L471 AbstractCegarLoop]: Abstraction has has 182 places, 189 transitions, 2473 flow [2024-12-02 15:34:44,460 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 19.692307692307693) internal successors, (256), 13 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:34:44,460 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 15:34:44,460 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:34:44,468 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-12-02 15:34:44,660 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:34:44,660 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-12-02 15:34:44,661 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:34:44,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1678872056, now seen corresponding path program 6 times [2024-12-02 15:34:44,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:34:44,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613555040] [2024-12-02 15:34:44,661 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 15:34:44,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:34:44,673 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-12-02 15:34:44,673 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:34:44,926 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-12-02 15:34:44,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:34:44,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613555040] [2024-12-02 15:34:44,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613555040] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 15:34:44,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 15:34:44,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-12-02 15:34:44,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603205436] [2024-12-02 15:34:44,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 15:34:44,926 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-12-02 15:34:44,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:34:44,927 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-12-02 15:34:44,927 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-12-02 15:34:45,105 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 42 [2024-12-02 15:34:45,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 189 transitions, 2473 flow. Second operand has 10 states, 10 states have (on average 20.2) internal successors, (202), 10 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:34:45,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 15:34:45,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 42 [2024-12-02 15:34:45,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 15:34:46,145 INFO L124 PetriNetUnfolderBase]: 2439/4803 cut-off events. [2024-12-02 15:34:46,145 INFO L125 PetriNetUnfolderBase]: For 46685/46760 co-relation queries the response was YES. [2024-12-02 15:34:46,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27401 conditions, 4803 events. 2439/4803 cut-off events. For 46685/46760 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 31650 event pairs, 1302 based on Foata normal form. 10/4791 useless extension candidates. Maximal degree in co-relation 27266. Up to 3438 conditions per place. [2024-12-02 15:34:46,179 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 190 selfloop transitions, 37 changer transitions 3/243 dead transitions. [2024-12-02 15:34:46,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 243 transitions, 3512 flow [2024-12-02 15:34:46,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-12-02 15:34:46,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-12-02 15:34:46,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 229 transitions. [2024-12-02 15:34:46,181 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6058201058201058 [2024-12-02 15:34:46,181 INFO L175 Difference]: Start difference. First operand has 182 places, 189 transitions, 2473 flow. Second operand 9 states and 229 transitions. [2024-12-02 15:34:46,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 243 transitions, 3512 flow [2024-12-02 15:34:46,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 243 transitions, 3415 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-12-02 15:34:46,309 INFO L231 Difference]: Finished difference. Result has 187 places, 196 transitions, 2619 flow [2024-12-02 15:34:46,309 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2378, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2619, PETRI_PLACES=187, PETRI_TRANSITIONS=196} [2024-12-02 15:34:46,310 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 145 predicate places. [2024-12-02 15:34:46,310 INFO L471 AbstractCegarLoop]: Abstraction has has 187 places, 196 transitions, 2619 flow [2024-12-02 15:34:46,310 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 20.2) internal successors, (202), 10 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:34:46,310 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 15:34:46,310 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:34:46,310 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-12-02 15:34:46,310 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-12-02 15:34:46,311 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:34:46,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1026097428, now seen corresponding path program 7 times [2024-12-02 15:34:46,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:34:46,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322191425] [2024-12-02 15:34:46,311 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 15:34:46,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:34:46,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:34:46,902 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-02 15:34:46,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:34:46,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322191425] [2024-12-02 15:34:46,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322191425] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:34:46,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323806771] [2024-12-02 15:34:46,903 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 15:34:46,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:34:46,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:34:46,904 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:34:46,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-12-02 15:34:47,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:34:47,031 INFO L256 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-12-02 15:34:47,032 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:34:47,156 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 15:34:47,156 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2024-12-02 15:34:47,215 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-12-02 15:34:47,215 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:35:15,995 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-12-02 15:35:15,995 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 50 [2024-12-02 15:35:16,023 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-12-02 15:35:16,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323806771] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 15:35:16,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 15:35:16,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 28 [2024-12-02 15:35:16,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279438091] [2024-12-02 15:35:16,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 15:35:16,024 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-12-02 15:35:16,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:35:16,024 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-12-02 15:35:16,024 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=628, Unknown=5, NotChecked=0, Total=756 [2024-12-02 15:35:20,048 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 15:35:24,229 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 15:35:28,287 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 15:35:32,313 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 15:35:36,376 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 15:35:40,454 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 15:35:44,482 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 15:35:48,526 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 15:35:52,565 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 15:35:56,622 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 15:36:00,650 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 15:36:00,650 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-12-02 15:36:00,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 196 transitions, 2619 flow. Second operand has 28 states, 28 states have (on average 8.142857142857142) internal successors, (228), 28 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:36:00,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 15:36:00,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-12-02 15:36:00,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 15:36:02,700 INFO L124 PetriNetUnfolderBase]: 4146/7117 cut-off events. [2024-12-02 15:36:02,700 INFO L125 PetriNetUnfolderBase]: For 57840/57840 co-relation queries the response was YES. [2024-12-02 15:36:02,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38624 conditions, 7117 events. 4146/7117 cut-off events. For 57840/57840 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 41399 event pairs, 1349 based on Foata normal form. 1/7118 useless extension candidates. Maximal degree in co-relation 38487. Up to 5866 conditions per place. [2024-12-02 15:36:02,767 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 210 selfloop transitions, 38 changer transitions 3/252 dead transitions. [2024-12-02 15:36:02,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 252 transitions, 3642 flow [2024-12-02 15:36:02,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-12-02 15:36:02,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-12-02 15:36:02,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 152 transitions. [2024-12-02 15:36:02,768 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.30158730158730157 [2024-12-02 15:36:02,768 INFO L175 Difference]: Start difference. First operand has 187 places, 196 transitions, 2619 flow. Second operand 12 states and 152 transitions. [2024-12-02 15:36:02,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 252 transitions, 3642 flow [2024-12-02 15:36:02,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 252 transitions, 3566 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-12-02 15:36:02,972 INFO L231 Difference]: Finished difference. Result has 195 places, 196 transitions, 2644 flow [2024-12-02 15:36:02,972 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2543, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2644, PETRI_PLACES=195, PETRI_TRANSITIONS=196} [2024-12-02 15:36:02,973 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 153 predicate places. [2024-12-02 15:36:02,973 INFO L471 AbstractCegarLoop]: Abstraction has has 195 places, 196 transitions, 2644 flow [2024-12-02 15:36:02,973 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 8.142857142857142) internal successors, (228), 28 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:36:02,973 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 15:36:02,973 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:36:02,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-12-02 15:36:03,173 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:36:03,174 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-12-02 15:36:03,174 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:36:03,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1466499988, now seen corresponding path program 8 times [2024-12-02 15:36:03,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:36:03,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361436562] [2024-12-02 15:36:03,174 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 15:36:03,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:36:03,205 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 15:36:03,205 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:36:03,901 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-02 15:36:03,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:36:03,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361436562] [2024-12-02 15:36:03,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361436562] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:36:03,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502697557] [2024-12-02 15:36:03,901 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 15:36:03,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:36:03,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:36:03,903 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:36:03,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-12-02 15:36:04,036 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 15:36:04,036 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:36:04,038 INFO L256 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-12-02 15:36:04,039 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:36:04,329 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 15:36:04,329 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2024-12-02 15:36:04,435 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-02 15:36:04,435 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:36:05,142 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-12-02 15:36:05,142 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 58 [2024-12-02 15:36:05,178 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2024-12-02 15:36:05,178 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2024-12-02 15:36:05,183 WARN L214 Elim1Store]: Array PQE input equivalent to true [2024-12-02 15:36:05,190 INFO L349 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2024-12-02 15:36:05,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 1 [2024-12-02 15:36:05,198 INFO L349 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2024-12-02 15:36:05,198 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 1 [2024-12-02 15:36:05,250 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-12-02 15:36:05,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502697557] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 15:36:05,250 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 15:36:05,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 29 [2024-12-02 15:36:05,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309104527] [2024-12-02 15:36:05,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 15:36:05,251 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-12-02 15:36:05,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:36:05,251 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-12-02 15:36:05,251 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2024-12-02 15:36:06,548 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-12-02 15:36:06,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 196 transitions, 2644 flow. Second operand has 29 states, 29 states have (on average 18.275862068965516) internal successors, (530), 29 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:36:06,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 15:36:06,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-12-02 15:36:06,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 15:36:10,082 INFO L124 PetriNetUnfolderBase]: 4520/7949 cut-off events. [2024-12-02 15:36:10,082 INFO L125 PetriNetUnfolderBase]: For 65242/65464 co-relation queries the response was YES. [2024-12-02 15:36:10,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43142 conditions, 7949 events. 4520/7949 cut-off events. For 65242/65464 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 49274 event pairs, 1061 based on Foata normal form. 1/7950 useless extension candidates. Maximal degree in co-relation 43002. Up to 3837 conditions per place. [2024-12-02 15:36:10,163 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 190 selfloop transitions, 131 changer transitions 3/328 dead transitions. [2024-12-02 15:36:10,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 328 transitions, 4537 flow [2024-12-02 15:36:10,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-12-02 15:36:10,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-12-02 15:36:10,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 499 transitions. [2024-12-02 15:36:10,165 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.54004329004329 [2024-12-02 15:36:10,165 INFO L175 Difference]: Start difference. First operand has 195 places, 196 transitions, 2644 flow. Second operand 22 states and 499 transitions. [2024-12-02 15:36:10,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 328 transitions, 4537 flow [2024-12-02 15:36:10,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 328 transitions, 4445 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-12-02 15:36:10,506 INFO L231 Difference]: Finished difference. Result has 211 places, 234 transitions, 3551 flow [2024-12-02 15:36:10,506 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2570, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3551, PETRI_PLACES=211, PETRI_TRANSITIONS=234} [2024-12-02 15:36:10,507 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 169 predicate places. [2024-12-02 15:36:10,507 INFO L471 AbstractCegarLoop]: Abstraction has has 211 places, 234 transitions, 3551 flow [2024-12-02 15:36:10,507 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 18.275862068965516) internal successors, (530), 29 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:36:10,507 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 15:36:10,507 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:36:10,516 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-12-02 15:36:10,707 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:36:10,708 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-12-02 15:36:10,708 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:36:10,708 INFO L85 PathProgramCache]: Analyzing trace with hash -437097298, now seen corresponding path program 9 times [2024-12-02 15:36:10,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:36:10,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142603685] [2024-12-02 15:36:10,708 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 15:36:10,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:36:10,720 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-12-02 15:36:10,720 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:36:10,987 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-12-02 15:36:10,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:36:10,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142603685] [2024-12-02 15:36:10,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142603685] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 15:36:10,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 15:36:10,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-12-02 15:36:10,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258393050] [2024-12-02 15:36:10,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 15:36:10,988 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-12-02 15:36:10,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:36:10,988 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-12-02 15:36:10,989 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-12-02 15:36:11,208 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 42 [2024-12-02 15:36:11,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 234 transitions, 3551 flow. Second operand has 10 states, 10 states have (on average 20.2) internal successors, (202), 10 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:36:11,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 15:36:11,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 42 [2024-12-02 15:36:11,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 15:36:12,714 INFO L124 PetriNetUnfolderBase]: 3083/6125 cut-off events. [2024-12-02 15:36:12,714 INFO L125 PetriNetUnfolderBase]: For 69909/70012 co-relation queries the response was YES. [2024-12-02 15:36:12,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37489 conditions, 6125 events. 3083/6125 cut-off events. For 69909/70012 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 42431 event pairs, 1814 based on Foata normal form. 9/6106 useless extension candidates. Maximal degree in co-relation 37344. Up to 4331 conditions per place. [2024-12-02 15:36:12,766 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 205 selfloop transitions, 52 changer transitions 2/275 dead transitions. [2024-12-02 15:36:12,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 275 transitions, 4607 flow [2024-12-02 15:36:12,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-12-02 15:36:12,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-12-02 15:36:12,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 223 transitions. [2024-12-02 15:36:12,768 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.58994708994709 [2024-12-02 15:36:12,768 INFO L175 Difference]: Start difference. First operand has 211 places, 234 transitions, 3551 flow. Second operand 9 states and 223 transitions. [2024-12-02 15:36:12,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 275 transitions, 4607 flow [2024-12-02 15:36:12,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 275 transitions, 4407 flow, removed 65 selfloop flow, removed 8 redundant places. [2024-12-02 15:36:12,996 INFO L231 Difference]: Finished difference. Result has 215 places, 249 transitions, 3806 flow [2024-12-02 15:36:12,996 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3367, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3806, PETRI_PLACES=215, PETRI_TRANSITIONS=249} [2024-12-02 15:36:12,997 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 173 predicate places. [2024-12-02 15:36:12,997 INFO L471 AbstractCegarLoop]: Abstraction has has 215 places, 249 transitions, 3806 flow [2024-12-02 15:36:12,997 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 20.2) internal successors, (202), 10 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:36:12,997 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 15:36:12,997 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:36:12,997 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-12-02 15:36:12,997 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-12-02 15:36:12,998 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:36:12,998 INFO L85 PathProgramCache]: Analyzing trace with hash 940784944, now seen corresponding path program 10 times [2024-12-02 15:36:12,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:36:12,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803979370] [2024-12-02 15:36:12,998 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 15:36:12,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:36:13,022 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 15:36:13,022 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:36:14,849 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 15:36:14,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:36:14,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803979370] [2024-12-02 15:36:14,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803979370] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:36:14,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020752122] [2024-12-02 15:36:14,850 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 15:36:14,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:36:14,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:36:14,852 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:36:14,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-12-02 15:36:14,985 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 15:36:14,985 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:36:14,986 INFO L256 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-12-02 15:36:14,988 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:36:15,423 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 15:36:15,423 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-12-02 15:36:15,510 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-02 15:36:15,510 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 15:36:15,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020752122] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 15:36:15,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 15:36:15,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [25] total 36 [2024-12-02 15:36:15,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920917038] [2024-12-02 15:36:15,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 15:36:15,511 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-12-02 15:36:15,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:36:15,512 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-12-02 15:36:15,512 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1128, Unknown=0, NotChecked=0, Total=1260 [2024-12-02 15:36:15,754 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 42 [2024-12-02 15:36:15,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 249 transitions, 3806 flow. Second operand has 13 states, 13 states have (on average 19.692307692307693) internal successors, (256), 13 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:36:15,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 15:36:15,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 42 [2024-12-02 15:36:15,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 15:36:17,314 INFO L124 PetriNetUnfolderBase]: 3145/6276 cut-off events. [2024-12-02 15:36:17,314 INFO L125 PetriNetUnfolderBase]: For 71265/71333 co-relation queries the response was YES. [2024-12-02 15:36:17,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38304 conditions, 6276 events. 3145/6276 cut-off events. For 71265/71333 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 43797 event pairs, 1098 based on Foata normal form. 9/6266 useless extension candidates. Maximal degree in co-relation 38156. Up to 4376 conditions per place. [2024-12-02 15:36:17,372 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 211 selfloop transitions, 58 changer transitions 1/286 dead transitions. [2024-12-02 15:36:17,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 286 transitions, 4766 flow [2024-12-02 15:36:17,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-12-02 15:36:17,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-12-02 15:36:17,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 262 transitions. [2024-12-02 15:36:17,373 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5670995670995671 [2024-12-02 15:36:17,373 INFO L175 Difference]: Start difference. First operand has 215 places, 249 transitions, 3806 flow. Second operand 11 states and 262 transitions. [2024-12-02 15:36:17,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 286 transitions, 4766 flow [2024-12-02 15:36:17,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 286 transitions, 4705 flow, removed 24 selfloop flow, removed 1 redundant places. [2024-12-02 15:36:17,604 INFO L231 Difference]: Finished difference. Result has 227 places, 260 transitions, 4124 flow [2024-12-02 15:36:17,604 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3747, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4124, PETRI_PLACES=227, PETRI_TRANSITIONS=260} [2024-12-02 15:36:17,604 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 185 predicate places. [2024-12-02 15:36:17,604 INFO L471 AbstractCegarLoop]: Abstraction has has 227 places, 260 transitions, 4124 flow [2024-12-02 15:36:17,604 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 19.692307692307693) internal successors, (256), 13 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:36:17,605 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 15:36:17,605 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:36:17,610 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-12-02 15:36:17,805 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-12-02 15:36:17,805 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-12-02 15:36:17,805 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:36:17,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1989144990, now seen corresponding path program 11 times [2024-12-02 15:36:17,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:36:17,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113901429] [2024-12-02 15:36:17,806 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 15:36:17,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:36:17,836 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-12-02 15:36:17,836 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:36:19,371 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 13 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 15:36:19,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:36:19,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113901429] [2024-12-02 15:36:19,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113901429] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:36:19,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906040329] [2024-12-02 15:36:19,372 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 15:36:19,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:36:19,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:36:19,374 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:36:19,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-12-02 15:36:19,643 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-12-02 15:36:19,643 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:36:19,645 INFO L256 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-12-02 15:36:19,646 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:36:19,706 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 19 treesize of output 1 [2024-12-02 15:36:19,959 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 15:36:19,959 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-12-02 15:36:20,047 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-02 15:36:20,047 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:36:21,015 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-12-02 15:36:21,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906040329] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 15:36:21,015 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 15:36:21,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 12, 10] total 42 [2024-12-02 15:36:21,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475311151] [2024-12-02 15:36:21,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 15:36:21,015 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-12-02 15:36:21,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:36:21,016 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-12-02 15:36:21,016 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1532, Unknown=0, NotChecked=0, Total=1722 [2024-12-02 15:36:23,098 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-12-02 15:36:23,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 260 transitions, 4124 flow. Second operand has 42 states, 42 states have (on average 14.095238095238095) internal successors, (592), 42 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:36:23,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 15:36:23,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-12-02 15:36:23,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 15:36:25,355 INFO L124 PetriNetUnfolderBase]: 4743/8394 cut-off events. [2024-12-02 15:36:25,355 INFO L125 PetriNetUnfolderBase]: For 87166/87329 co-relation queries the response was YES. [2024-12-02 15:36:25,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49586 conditions, 8394 events. 4743/8394 cut-off events. For 87166/87329 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 52863 event pairs, 1666 based on Foata normal form. 1/8395 useless extension candidates. Maximal degree in co-relation 49433. Up to 6652 conditions per place. [2024-12-02 15:36:25,428 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 228 selfloop transitions, 64 changer transitions 1/297 dead transitions. [2024-12-02 15:36:25,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 297 transitions, 5107 flow [2024-12-02 15:36:25,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-12-02 15:36:25,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-12-02 15:36:25,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 278 transitions. [2024-12-02 15:36:25,429 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-12-02 15:36:25,429 INFO L175 Difference]: Start difference. First operand has 227 places, 260 transitions, 4124 flow. Second operand 16 states and 278 transitions. [2024-12-02 15:36:25,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 297 transitions, 5107 flow [2024-12-02 15:36:25,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 297 transitions, 4972 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-12-02 15:36:25,749 INFO L231 Difference]: Finished difference. Result has 238 places, 265 transitions, 4280 flow [2024-12-02 15:36:25,749 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3989, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=4280, PETRI_PLACES=238, PETRI_TRANSITIONS=265} [2024-12-02 15:36:25,749 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 196 predicate places. [2024-12-02 15:36:25,749 INFO L471 AbstractCegarLoop]: Abstraction has has 238 places, 265 transitions, 4280 flow [2024-12-02 15:36:25,749 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 14.095238095238095) internal successors, (592), 42 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:36:25,750 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 15:36:25,750 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:36:25,759 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-12-02 15:36:25,950 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-12-02 15:36:25,950 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-12-02 15:36:25,950 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:36:25,951 INFO L85 PathProgramCache]: Analyzing trace with hash -659546580, now seen corresponding path program 12 times [2024-12-02 15:36:25,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:36:25,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196430167] [2024-12-02 15:36:25,951 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 15:36:25,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:36:25,963 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-12-02 15:36:25,963 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:36:26,188 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-12-02 15:36:26,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:36:26,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196430167] [2024-12-02 15:36:26,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196430167] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 15:36:26,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 15:36:26,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-12-02 15:36:26,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922149322] [2024-12-02 15:36:26,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 15:36:26,189 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-12-02 15:36:26,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:36:26,189 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-12-02 15:36:26,189 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-12-02 15:36:26,376 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 42 [2024-12-02 15:36:26,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 265 transitions, 4280 flow. Second operand has 10 states, 10 states have (on average 20.2) internal successors, (202), 10 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:36:26,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 15:36:26,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 42 [2024-12-02 15:36:26,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 15:36:27,742 INFO L124 PetriNetUnfolderBase]: 3227/6375 cut-off events. [2024-12-02 15:36:27,742 INFO L125 PetriNetUnfolderBase]: For 81323/81428 co-relation queries the response was YES. [2024-12-02 15:36:27,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39996 conditions, 6375 events. 3227/6375 cut-off events. For 81323/81428 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 44477 event pairs, 1889 based on Foata normal form. 9/6346 useless extension candidates. Maximal degree in co-relation 39836. Up to 4549 conditions per place. [2024-12-02 15:36:27,785 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 224 selfloop transitions, 60 changer transitions 2/302 dead transitions. [2024-12-02 15:36:27,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 302 transitions, 5309 flow [2024-12-02 15:36:27,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-12-02 15:36:27,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-12-02 15:36:27,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 225 transitions. [2024-12-02 15:36:27,785 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-12-02 15:36:27,785 INFO L175 Difference]: Start difference. First operand has 238 places, 265 transitions, 4280 flow. Second operand 9 states and 225 transitions. [2024-12-02 15:36:27,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 302 transitions, 5309 flow [2024-12-02 15:36:28,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 302 transitions, 5132 flow, removed 13 selfloop flow, removed 15 redundant places. [2024-12-02 15:36:28,016 INFO L231 Difference]: Finished difference. Result has 234 places, 276 transitions, 4511 flow [2024-12-02 15:36:28,017 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4103, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4511, PETRI_PLACES=234, PETRI_TRANSITIONS=276} [2024-12-02 15:36:28,017 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 192 predicate places. [2024-12-02 15:36:28,017 INFO L471 AbstractCegarLoop]: Abstraction has has 234 places, 276 transitions, 4511 flow [2024-12-02 15:36:28,017 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 20.2) internal successors, (202), 10 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:36:28,017 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 15:36:28,017 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:36:28,017 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-12-02 15:36:28,017 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-12-02 15:36:28,018 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:36:28,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1039992496, now seen corresponding path program 13 times [2024-12-02 15:36:28,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:36:28,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712331102] [2024-12-02 15:36:28,018 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 15:36:28,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:36:28,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:36:29,189 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 1 proven. 30 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-12-02 15:36:29,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:36:29,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712331102] [2024-12-02 15:36:29,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712331102] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:36:29,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390682487] [2024-12-02 15:36:29,190 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 15:36:29,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:36:29,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:36:29,191 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:36:29,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-12-02 15:36:29,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:36:29,310 INFO L256 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-12-02 15:36:29,311 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:36:29,487 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 15:36:29,487 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2024-12-02 15:36:29,586 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-12-02 15:36:29,586 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 15:36:29,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390682487] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 15:36:29,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 15:36:29,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [20] total 29 [2024-12-02 15:36:29,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641451315] [2024-12-02 15:36:29,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 15:36:29,587 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-12-02 15:36:29,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:36:29,587 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-12-02 15:36:29,587 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812 [2024-12-02 15:36:29,728 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 42 [2024-12-02 15:36:29,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 276 transitions, 4511 flow. Second operand has 10 states, 10 states have (on average 20.2) internal successors, (202), 10 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:36:29,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 15:36:29,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 42 [2024-12-02 15:36:29,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 15:36:31,192 INFO L124 PetriNetUnfolderBase]: 3233/6446 cut-off events. [2024-12-02 15:36:31,192 INFO L125 PetriNetUnfolderBase]: For 84352/84390 co-relation queries the response was YES. [2024-12-02 15:36:31,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41109 conditions, 6446 events. 3233/6446 cut-off events. For 84352/84390 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 45301 event pairs, 1131 based on Foata normal form. 5/6430 useless extension candidates. Maximal degree in co-relation 40952. Up to 4512 conditions per place. [2024-12-02 15:36:31,244 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 229 selfloop transitions, 57 changer transitions 1/303 dead transitions. [2024-12-02 15:36:31,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 303 transitions, 5340 flow [2024-12-02 15:36:31,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-12-02 15:36:31,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-12-02 15:36:31,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2024-12-02 15:36:31,245 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5978835978835979 [2024-12-02 15:36:31,245 INFO L175 Difference]: Start difference. First operand has 234 places, 276 transitions, 4511 flow. Second operand 9 states and 226 transitions. [2024-12-02 15:36:31,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 303 transitions, 5340 flow [2024-12-02 15:36:31,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 303 transitions, 5144 flow, removed 65 selfloop flow, removed 4 redundant places. [2024-12-02 15:36:31,515 INFO L231 Difference]: Finished difference. Result has 239 places, 277 transitions, 4480 flow [2024-12-02 15:36:31,515 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4315, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4480, PETRI_PLACES=239, PETRI_TRANSITIONS=277} [2024-12-02 15:36:31,516 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 197 predicate places. [2024-12-02 15:36:31,516 INFO L471 AbstractCegarLoop]: Abstraction has has 239 places, 277 transitions, 4480 flow [2024-12-02 15:36:31,516 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 20.2) internal successors, (202), 10 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:36:31,516 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 15:36:31,516 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:36:31,522 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-12-02 15:36:31,716 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-12-02 15:36:31,716 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-12-02 15:36:31,717 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:36:31,717 INFO L85 PathProgramCache]: Analyzing trace with hash -649389016, now seen corresponding path program 14 times [2024-12-02 15:36:31,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:36:31,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084685070] [2024-12-02 15:36:31,717 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 15:36:31,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:36:31,727 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-12-02 15:36:31,727 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:36:32,024 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-12-02 15:36:32,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:36:32,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084685070] [2024-12-02 15:36:32,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084685070] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 15:36:32,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 15:36:32,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-12-02 15:36:32,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810629959] [2024-12-02 15:36:32,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 15:36:32,025 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-12-02 15:36:32,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:36:32,025 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-12-02 15:36:32,025 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-12-02 15:36:32,215 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 42 [2024-12-02 15:36:32,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 277 transitions, 4480 flow. Second operand has 10 states, 10 states have (on average 19.3) internal successors, (193), 10 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:36:32,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 15:36:32,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 42 [2024-12-02 15:36:32,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 15:36:33,720 INFO L124 PetriNetUnfolderBase]: 3619/6991 cut-off events. [2024-12-02 15:36:33,720 INFO L125 PetriNetUnfolderBase]: For 90014/90068 co-relation queries the response was YES. [2024-12-02 15:36:33,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43988 conditions, 6991 events. 3619/6991 cut-off events. For 90014/90068 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 48268 event pairs, 2227 based on Foata normal form. 1/6968 useless extension candidates. Maximal degree in co-relation 43828. Up to 5136 conditions per place. [2024-12-02 15:36:33,782 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 239 selfloop transitions, 60 changer transitions 4/309 dead transitions. [2024-12-02 15:36:33,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 309 transitions, 5384 flow [2024-12-02 15:36:33,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-12-02 15:36:33,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-12-02 15:36:33,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 242 transitions. [2024-12-02 15:36:33,783 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5761904761904761 [2024-12-02 15:36:33,783 INFO L175 Difference]: Start difference. First operand has 239 places, 277 transitions, 4480 flow. Second operand 10 states and 242 transitions. [2024-12-02 15:36:33,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 309 transitions, 5384 flow [2024-12-02 15:36:34,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 309 transitions, 5268 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-12-02 15:36:34,093 INFO L231 Difference]: Finished difference. Result has 244 places, 278 transitions, 4536 flow [2024-12-02 15:36:34,093 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4364, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4536, PETRI_PLACES=244, PETRI_TRANSITIONS=278} [2024-12-02 15:36:34,094 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 202 predicate places. [2024-12-02 15:36:34,094 INFO L471 AbstractCegarLoop]: Abstraction has has 244 places, 278 transitions, 4536 flow [2024-12-02 15:36:34,094 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 19.3) internal successors, (193), 10 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:36:34,094 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 15:36:34,094 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:36:34,094 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-12-02 15:36:34,094 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-12-02 15:36:34,094 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:36:34,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1401101964, now seen corresponding path program 15 times [2024-12-02 15:36:34,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:36:34,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827284974] [2024-12-02 15:36:34,095 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 15:36:34,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:36:34,109 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-12-02 15:36:34,109 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:36:34,604 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-02 15:36:34,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:36:34,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827284974] [2024-12-02 15:36:34,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827284974] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:36:34,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264029892] [2024-12-02 15:36:34,604 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 15:36:34,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:36:34,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:36:34,606 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:36:34,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-12-02 15:36:34,728 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-12-02 15:36:34,728 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:36:34,729 INFO L256 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-12-02 15:36:34,730 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:36:34,940 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 15:36:34,941 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2024-12-02 15:36:34,998 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-02 15:36:34,998 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:37:03,978 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-12-02 15:37:03,978 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-12-02 15:37:04,018 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-12-02 15:37:04,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264029892] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 15:37:04,018 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 15:37:04,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 30 [2024-12-02 15:37:04,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437957004] [2024-12-02 15:37:04,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 15:37:04,018 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-12-02 15:37:04,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:37:04,019 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-12-02 15:37:04,019 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=759, Unknown=7, NotChecked=0, Total=870 [2024-12-02 15:37:08,070 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 15:37:12,330 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 15:37:16,538 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 15:37:20,659 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 15:37:24,841 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 15:37:28,990 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 15:37:33,197 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 15:37:37,339 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 15:37:41,516 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 15:37:45,582 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 15:37:45,582 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-12-02 15:37:45,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 278 transitions, 4536 flow. Second operand has 30 states, 30 states have (on average 8.3) internal successors, (249), 30 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:37:45,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 15:37:45,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-12-02 15:37:45,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 15:37:48,339 INFO L124 PetriNetUnfolderBase]: 5495/9404 cut-off events. [2024-12-02 15:37:48,339 INFO L125 PetriNetUnfolderBase]: For 109234/109234 co-relation queries the response was YES. [2024-12-02 15:37:48,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57448 conditions, 9404 events. 5495/9404 cut-off events. For 109234/109234 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 57857 event pairs, 3268 based on Foata normal form. 1/9405 useless extension candidates. Maximal degree in co-relation 57287. Up to 8101 conditions per place. [2024-12-02 15:37:48,419 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 287 selfloop transitions, 74 changer transitions 2/364 dead transitions. [2024-12-02 15:37:48,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 364 transitions, 6395 flow [2024-12-02 15:37:48,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-12-02 15:37:48,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-12-02 15:37:48,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 169 transitions. [2024-12-02 15:37:48,419 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.28741496598639454 [2024-12-02 15:37:48,420 INFO L175 Difference]: Start difference. First operand has 244 places, 278 transitions, 4536 flow. Second operand 14 states and 169 transitions. [2024-12-02 15:37:48,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 364 transitions, 6395 flow [2024-12-02 15:37:48,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 364 transitions, 6239 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-12-02 15:37:48,894 INFO L231 Difference]: Finished difference. Result has 256 places, 297 transitions, 5096 flow [2024-12-02 15:37:48,894 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4390, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=5096, PETRI_PLACES=256, PETRI_TRANSITIONS=297} [2024-12-02 15:37:48,895 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 214 predicate places. [2024-12-02 15:37:48,895 INFO L471 AbstractCegarLoop]: Abstraction has has 256 places, 297 transitions, 5096 flow [2024-12-02 15:37:48,895 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 8.3) internal successors, (249), 30 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:37:48,895 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 15:37:48,895 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:37:48,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-12-02 15:37:49,095 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-12-02 15:37:49,095 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-12-02 15:37:49,096 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:37:49,096 INFO L85 PathProgramCache]: Analyzing trace with hash 893207978, now seen corresponding path program 16 times [2024-12-02 15:37:49,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:37:49,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273190958] [2024-12-02 15:37:49,096 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 15:37:49,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:37:49,120 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 15:37:49,120 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:37:49,625 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-02 15:37:49,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:37:49,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273190958] [2024-12-02 15:37:49,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273190958] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 15:37:49,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 15:37:49,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-12-02 15:37:49,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706705683] [2024-12-02 15:37:49,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 15:37:49,625 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-12-02 15:37:49,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:37:49,626 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-12-02 15:37:49,626 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2024-12-02 15:37:50,105 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 42 [2024-12-02 15:37:50,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 297 transitions, 5096 flow. Second operand has 13 states, 13 states have (on average 19.692307692307693) internal successors, (256), 13 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:37:50,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 15:37:50,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 42 [2024-12-02 15:37:50,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 15:37:51,983 INFO L124 PetriNetUnfolderBase]: 3414/6685 cut-off events. [2024-12-02 15:37:51,983 INFO L125 PetriNetUnfolderBase]: For 107216/107353 co-relation queries the response was YES. [2024-12-02 15:37:52,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45203 conditions, 6685 events. 3414/6685 cut-off events. For 107216/107353 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 46989 event pairs, 1901 based on Foata normal form. 5/6646 useless extension candidates. Maximal degree in co-relation 45034. Up to 5013 conditions per place. [2024-12-02 15:37:52,039 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 261 selfloop transitions, 71 changer transitions 1/350 dead transitions. [2024-12-02 15:37:52,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 350 transitions, 6607 flow [2024-12-02 15:37:52,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-12-02 15:37:52,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-12-02 15:37:52,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 262 transitions. [2024-12-02 15:37:52,040 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5670995670995671 [2024-12-02 15:37:52,040 INFO L175 Difference]: Start difference. First operand has 256 places, 297 transitions, 5096 flow. Second operand 11 states and 262 transitions. [2024-12-02 15:37:52,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 350 transitions, 6607 flow [2024-12-02 15:37:52,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 350 transitions, 6351 flow, removed 106 selfloop flow, removed 5 redundant places. [2024-12-02 15:37:52,399 INFO L231 Difference]: Finished difference. Result has 266 places, 318 transitions, 5625 flow [2024-12-02 15:37:52,399 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4883, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5625, PETRI_PLACES=266, PETRI_TRANSITIONS=318} [2024-12-02 15:37:52,399 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 224 predicate places. [2024-12-02 15:37:52,399 INFO L471 AbstractCegarLoop]: Abstraction has has 266 places, 318 transitions, 5625 flow [2024-12-02 15:37:52,400 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 19.692307692307693) internal successors, (256), 13 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:37:52,400 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 15:37:52,400 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:37:52,400 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-12-02 15:37:52,400 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-12-02 15:37:52,401 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:37:52,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1725274250, now seen corresponding path program 17 times [2024-12-02 15:37:52,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:37:52,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618664530] [2024-12-02 15:37:52,401 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 15:37:52,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:37:52,428 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-12-02 15:37:52,428 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:37:53,293 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-12-02 15:37:53,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:37:53,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618664530] [2024-12-02 15:37:53,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618664530] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:37:53,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510257737] [2024-12-02 15:37:53,294 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 15:37:53,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:37:53,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:37:53,295 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:37:53,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-12-02 15:37:53,522 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-12-02 15:37:53,522 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:37:53,524 INFO L256 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-12-02 15:37:53,525 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:37:53,840 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 15:37:53,841 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-12-02 15:37:53,891 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-02 15:37:53,891 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 15:37:53,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510257737] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 15:37:53,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 15:37:53,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [13] total 23 [2024-12-02 15:37:53,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443764555] [2024-12-02 15:37:53,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 15:37:53,891 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-12-02 15:37:53,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:37:53,892 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-12-02 15:37:53,892 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2024-12-02 15:37:54,146 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 42 [2024-12-02 15:37:54,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 318 transitions, 5625 flow. Second operand has 13 states, 13 states have (on average 19.692307692307693) internal successors, (256), 13 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:37:54,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 15:37:54,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 42 [2024-12-02 15:37:54,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 15:37:55,722 INFO L124 PetriNetUnfolderBase]: 3508/6860 cut-off events. [2024-12-02 15:37:55,722 INFO L125 PetriNetUnfolderBase]: For 112652/112793 co-relation queries the response was YES. [2024-12-02 15:37:55,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47298 conditions, 6860 events. 3508/6860 cut-off events. For 112652/112793 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 48615 event pairs, 1755 based on Foata normal form. 9/6834 useless extension candidates. Maximal degree in co-relation 47124. Up to 5160 conditions per place. [2024-12-02 15:37:55,784 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 281 selfloop transitions, 78 changer transitions 1/377 dead transitions. [2024-12-02 15:37:55,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 377 transitions, 7193 flow [2024-12-02 15:37:55,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-12-02 15:37:55,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-12-02 15:37:55,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 264 transitions. [2024-12-02 15:37:55,785 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-12-02 15:37:55,785 INFO L175 Difference]: Start difference. First operand has 266 places, 318 transitions, 5625 flow. Second operand 11 states and 264 transitions. [2024-12-02 15:37:55,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 377 transitions, 7193 flow [2024-12-02 15:37:56,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 377 transitions, 7014 flow, removed 88 selfloop flow, removed 2 redundant places. [2024-12-02 15:37:56,318 INFO L231 Difference]: Finished difference. Result has 277 places, 330 transitions, 5954 flow [2024-12-02 15:37:56,318 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5448, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5954, PETRI_PLACES=277, PETRI_TRANSITIONS=330} [2024-12-02 15:37:56,319 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 235 predicate places. [2024-12-02 15:37:56,319 INFO L471 AbstractCegarLoop]: Abstraction has has 277 places, 330 transitions, 5954 flow [2024-12-02 15:37:56,319 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 19.692307692307693) internal successors, (256), 13 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:37:56,319 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 15:37:56,319 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:37:56,325 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-12-02 15:37:56,519 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-12-02 15:37:56,520 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-12-02 15:37:56,520 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:37:56,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1256768926, now seen corresponding path program 18 times [2024-12-02 15:37:56,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:37:56,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080945496] [2024-12-02 15:37:56,520 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 15:37:56,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:37:56,536 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-12-02 15:37:56,536 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:37:57,005 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-02 15:37:57,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:37:57,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080945496] [2024-12-02 15:37:57,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080945496] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:37:57,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131820183] [2024-12-02 15:37:57,005 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 15:37:57,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:37:57,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:37:57,007 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:37:57,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-12-02 15:37:57,133 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-12-02 15:37:57,133 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:37:57,134 INFO L256 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-12-02 15:37:57,135 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:37:57,283 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 15:37:57,283 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2024-12-02 15:37:57,337 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-12-02 15:37:57,337 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:38:18,094 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-12-02 15:38:18,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 50 [2024-12-02 15:38:18,119 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-12-02 15:38:18,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131820183] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 15:38:18,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 15:38:18,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 28 [2024-12-02 15:38:18,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786760115] [2024-12-02 15:38:18,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 15:38:18,120 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-12-02 15:38:18,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:38:18,120 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-12-02 15:38:18,120 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=669, Unknown=4, NotChecked=0, Total=756 [2024-12-02 15:38:22,144 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 15:38:26,227 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 15:38:30,339 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 15:38:34,441 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 15:38:38,552 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 15:38:42,623 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 15:38:46,728 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 15:38:50,821 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 15:38:54,929 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 15:38:58,993 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 15:39:03,090 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 15:39:07,130 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 15:39:07,131 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-12-02 15:39:07,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 330 transitions, 5954 flow. Second operand has 28 states, 28 states have (on average 8.107142857142858) internal successors, (227), 28 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:39:07,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 15:39:07,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-12-02 15:39:07,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 15:39:10,944 INFO L124 PetriNetUnfolderBase]: 5771/9871 cut-off events. [2024-12-02 15:39:10,944 INFO L125 PetriNetUnfolderBase]: For 147062/147062 co-relation queries the response was YES. [2024-12-02 15:39:11,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64948 conditions, 9871 events. 5771/9871 cut-off events. For 147062/147062 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 61585 event pairs, 2532 based on Foata normal form. 1/9872 useless extension candidates. Maximal degree in co-relation 64771. Up to 5672 conditions per place. [2024-12-02 15:39:11,024 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 346 selfloop transitions, 154 changer transitions 11/512 dead transitions. [2024-12-02 15:39:11,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 512 transitions, 9563 flow [2024-12-02 15:39:11,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-12-02 15:39:11,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-12-02 15:39:11,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 213 transitions. [2024-12-02 15:39:11,025 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.29831932773109243 [2024-12-02 15:39:11,025 INFO L175 Difference]: Start difference. First operand has 277 places, 330 transitions, 5954 flow. Second operand 17 states and 213 transitions. [2024-12-02 15:39:11,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 512 transitions, 9563 flow [2024-12-02 15:39:11,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 512 transitions, 9384 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-12-02 15:39:11,591 INFO L231 Difference]: Finished difference. Result has 291 places, 345 transitions, 6536 flow [2024-12-02 15:39:11,591 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5799, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=6536, PETRI_PLACES=291, PETRI_TRANSITIONS=345} [2024-12-02 15:39:11,591 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 249 predicate places. [2024-12-02 15:39:11,591 INFO L471 AbstractCegarLoop]: Abstraction has has 291 places, 345 transitions, 6536 flow [2024-12-02 15:39:11,591 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 8.107142857142858) internal successors, (227), 28 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:39:11,591 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 15:39:11,592 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:39:11,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-12-02 15:39:11,792 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:39:11,792 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-12-02 15:39:11,793 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:39:11,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1726583446, now seen corresponding path program 19 times [2024-12-02 15:39:11,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:39:11,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931508818] [2024-12-02 15:39:11,793 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 15:39:11,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:39:11,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:39:12,405 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-02 15:39:12,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:39:12,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931508818] [2024-12-02 15:39:12,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931508818] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:39:12,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437326391] [2024-12-02 15:39:12,406 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 15:39:12,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:39:12,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:39:12,407 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:39:12,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-12-02 15:39:12,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:39:12,541 INFO L256 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-12-02 15:39:12,542 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:39:12,697 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 15:39:12,697 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2024-12-02 15:39:12,738 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-12-02 15:39:12,739 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:39:25,454 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-12-02 15:39:25,454 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 58 [2024-12-02 15:39:25,492 INFO L349 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2024-12-02 15:39:25,492 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 1 [2024-12-02 15:39:25,500 INFO L349 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2024-12-02 15:39:25,500 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 1 [2024-12-02 15:39:25,511 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2024-12-02 15:39:25,511 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2024-12-02 15:39:25,518 INFO L349 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2024-12-02 15:39:25,519 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 1 [2024-12-02 15:39:25,528 INFO L349 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2024-12-02 15:39:25,528 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 1 [2024-12-02 15:39:25,535 INFO L349 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2024-12-02 15:39:25,535 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 1 [2024-12-02 15:39:25,562 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-12-02 15:39:25,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437326391] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 15:39:25,563 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 15:39:25,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 28 [2024-12-02 15:39:25,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066737059] [2024-12-02 15:39:25,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 15:39:25,563 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-12-02 15:39:25,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:39:25,563 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-12-02 15:39:25,563 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=644, Unknown=2, NotChecked=0, Total=756 [2024-12-02 15:39:29,837 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 15:39:33,948 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 15:39:38,129 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 15:39:42,330 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 15:39:46,414 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 15:39:50,525 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 15:39:50,562 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-12-02 15:39:50,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 345 transitions, 6536 flow. Second operand has 28 states, 28 states have (on average 12.107142857142858) internal successors, (339), 28 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:39:50,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 15:39:50,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-12-02 15:39:50,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 15:39:54,037 INFO L124 PetriNetUnfolderBase]: 5860/10022 cut-off events. [2024-12-02 15:39:54,037 INFO L125 PetriNetUnfolderBase]: For 168381/168381 co-relation queries the response was YES. [2024-12-02 15:39:54,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68098 conditions, 10022 events. 5860/10022 cut-off events. For 168381/168381 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 62531 event pairs, 3431 based on Foata normal form. 1/10023 useless extension candidates. Maximal degree in co-relation 67916. Up to 8706 conditions per place. [2024-12-02 15:39:54,154 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 330 selfloop transitions, 79 changer transitions 2/412 dead transitions. [2024-12-02 15:39:54,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 412 transitions, 8328 flow [2024-12-02 15:39:54,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-12-02 15:39:54,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-12-02 15:39:54,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 231 transitions. [2024-12-02 15:39:54,155 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-12-02 15:39:54,155 INFO L175 Difference]: Start difference. First operand has 291 places, 345 transitions, 6536 flow. Second operand 14 states and 231 transitions. [2024-12-02 15:39:54,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 412 transitions, 8328 flow [2024-12-02 15:39:54,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 412 transitions, 7844 flow, removed 86 selfloop flow, removed 11 redundant places. [2024-12-02 15:39:54,963 INFO L231 Difference]: Finished difference. Result has 297 places, 364 transitions, 6847 flow [2024-12-02 15:39:54,963 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6080, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=6847, PETRI_PLACES=297, PETRI_TRANSITIONS=364} [2024-12-02 15:39:54,964 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 255 predicate places. [2024-12-02 15:39:54,964 INFO L471 AbstractCegarLoop]: Abstraction has has 297 places, 364 transitions, 6847 flow [2024-12-02 15:39:54,964 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 12.107142857142858) internal successors, (339), 28 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:39:54,964 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 15:39:54,964 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:39:54,970 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-12-02 15:39:55,164 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:39:55,165 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-12-02 15:39:55,165 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:39:55,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1683415612, now seen corresponding path program 20 times [2024-12-02 15:39:55,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:39:55,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997950569] [2024-12-02 15:39:55,165 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 15:39:55,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:39:55,192 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 15:39:55,192 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:39:55,766 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-02 15:39:55,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:39:55,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997950569] [2024-12-02 15:39:55,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997950569] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:39:55,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522340595] [2024-12-02 15:39:55,766 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 15:39:55,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:39:55,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:39:55,768 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:39:55,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-12-02 15:39:55,906 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 15:39:55,906 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:39:55,907 INFO L256 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-12-02 15:39:55,908 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:39:56,268 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 15:39:56,268 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-12-02 15:39:56,323 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-02 15:39:56,323 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:39:56,984 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-12-02 15:39:56,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-12-02 15:39:57,008 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2024-12-02 15:39:57,008 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2024-12-02 15:39:57,013 WARN L214 Elim1Store]: Array PQE input equivalent to true [2024-12-02 15:39:57,014 WARN L214 Elim1Store]: Array PQE input equivalent to true [2024-12-02 15:39:57,023 INFO L349 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2024-12-02 15:39:57,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 1 [2024-12-02 15:39:57,032 INFO L349 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2024-12-02 15:39:57,032 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 1 [2024-12-02 15:39:57,086 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-12-02 15:39:57,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522340595] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 15:39:57,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 15:39:57,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 29 [2024-12-02 15:39:57,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906210749] [2024-12-02 15:39:57,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 15:39:57,087 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-12-02 15:39:57,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:39:57,087 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-12-02 15:39:57,087 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2024-12-02 15:39:58,678 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-12-02 15:39:58,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 364 transitions, 6847 flow. Second operand has 29 states, 29 states have (on average 18.24137931034483) internal successors, (529), 29 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) [2024-12-02 15:39:58,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 15:39:58,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-12-02 15:39:58,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 15:40:03,277 INFO L124 PetriNetUnfolderBase]: 7284/12799 cut-off events. [2024-12-02 15:40:03,277 INFO L125 PetriNetUnfolderBase]: For 229721/230011 co-relation queries the response was YES. [2024-12-02 15:40:03,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88960 conditions, 12799 events. 7284/12799 cut-off events. For 229721/230011 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 87384 event pairs, 1731 based on Foata normal form. 1/12800 useless extension candidates. Maximal degree in co-relation 88777. Up to 5844 conditions per place. [2024-12-02 15:40:03,400 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 331 selfloop transitions, 327 changer transitions 5/667 dead transitions. [2024-12-02 15:40:03,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 667 transitions, 13152 flow [2024-12-02 15:40:03,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-12-02 15:40:03,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-12-02 15:40:03,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 457 transitions. [2024-12-02 15:40:03,401 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.544047619047619 [2024-12-02 15:40:03,401 INFO L175 Difference]: Start difference. First operand has 297 places, 364 transitions, 6847 flow. Second operand 20 states and 457 transitions. [2024-12-02 15:40:03,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 667 transitions, 13152 flow [2024-12-02 15:40:04,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 667 transitions, 12586 flow, removed 242 selfloop flow, removed 6 redundant places. [2024-12-02 15:40:04,453 INFO L231 Difference]: Finished difference. Result has 313 places, 540 transitions, 11146 flow [2024-12-02 15:40:04,453 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6507, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=11146, PETRI_PLACES=313, PETRI_TRANSITIONS=540} [2024-12-02 15:40:04,453 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 271 predicate places. [2024-12-02 15:40:04,453 INFO L471 AbstractCegarLoop]: Abstraction has has 313 places, 540 transitions, 11146 flow [2024-12-02 15:40:04,454 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 18.24137931034483) internal successors, (529), 29 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) [2024-12-02 15:40:04,454 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 15:40:04,454 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:40:04,459 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-12-02 15:40:04,654 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2024-12-02 15:40:04,654 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-12-02 15:40:04,655 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:40:04,655 INFO L85 PathProgramCache]: Analyzing trace with hash -285362796, now seen corresponding path program 21 times [2024-12-02 15:40:04,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:40:04,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644511656] [2024-12-02 15:40:04,655 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 15:40:04,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:40:04,669 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-12-02 15:40:04,669 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:40:05,168 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-02 15:40:05,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:40:05,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644511656] [2024-12-02 15:40:05,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644511656] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:40:05,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904342536] [2024-12-02 15:40:05,168 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 15:40:05,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:40:05,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:40:05,170 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:40:05,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-12-02 15:40:05,294 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-12-02 15:40:05,294 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:40:05,295 INFO L256 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-12-02 15:40:05,296 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:40:05,551 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 15:40:05,551 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2024-12-02 15:40:05,662 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-02 15:40:05,662 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:40:06,486 INFO L349 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2024-12-02 15:40:06,487 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2024-12-02 15:40:06,537 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-12-02 15:40:06,538 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-12-02 15:40:06,578 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-12-02 15:40:06,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904342536] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 15:40:06,579 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 15:40:06,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 28 [2024-12-02 15:40:06,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895751315] [2024-12-02 15:40:06,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 15:40:06,579 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-12-02 15:40:06,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:40:06,579 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-12-02 15:40:06,579 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2024-12-02 15:40:07,677 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-12-02 15:40:07,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 540 transitions, 11146 flow. Second operand has 28 states, 28 states have (on average 18.392857142857142) internal successors, (515), 28 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:40:07,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 15:40:07,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-12-02 15:40:07,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 15:40:12,992 INFO L124 PetriNetUnfolderBase]: 7285/12810 cut-off events. [2024-12-02 15:40:12,992 INFO L125 PetriNetUnfolderBase]: For 240582/240872 co-relation queries the response was YES. [2024-12-02 15:40:13,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93451 conditions, 12810 events. 7285/12810 cut-off events. For 240582/240872 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 87621 event pairs, 1721 based on Foata normal form. 1/12811 useless extension candidates. Maximal degree in co-relation 93266. Up to 5861 conditions per place. [2024-12-02 15:40:13,323 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 346 selfloop transitions, 361 changer transitions 4/715 dead transitions. [2024-12-02 15:40:13,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 715 transitions, 14451 flow [2024-12-02 15:40:13,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-12-02 15:40:13,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-12-02 15:40:13,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 459 transitions. [2024-12-02 15:40:13,325 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5464285714285714 [2024-12-02 15:40:13,325 INFO L175 Difference]: Start difference. First operand has 313 places, 540 transitions, 11146 flow. Second operand 20 states and 459 transitions. [2024-12-02 15:40:13,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 715 transitions, 14451 flow [2024-12-02 15:40:14,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 715 transitions, 14270 flow, removed 68 selfloop flow, removed 6 redundant places. [2024-12-02 15:40:14,602 INFO L231 Difference]: Finished difference. Result has 328 places, 566 transitions, 12210 flow [2024-12-02 15:40:14,602 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10965, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=335, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=12210, PETRI_PLACES=328, PETRI_TRANSITIONS=566} [2024-12-02 15:40:14,603 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 286 predicate places. [2024-12-02 15:40:14,603 INFO L471 AbstractCegarLoop]: Abstraction has has 328 places, 566 transitions, 12210 flow [2024-12-02 15:40:14,603 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 18.392857142857142) internal successors, (515), 28 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:40:14,603 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 15:40:14,603 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:40:14,609 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-12-02 15:40:14,803 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2024-12-02 15:40:14,804 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-12-02 15:40:14,804 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:40:14,804 INFO L85 PathProgramCache]: Analyzing trace with hash 647576302, now seen corresponding path program 22 times [2024-12-02 15:40:14,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:40:14,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414148671] [2024-12-02 15:40:14,804 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 15:40:14,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:40:14,836 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 15:40:14,836 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:40:16,355 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 7 proven. 25 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-12-02 15:40:16,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:40:16,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414148671] [2024-12-02 15:40:16,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414148671] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:40:16,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381469776] [2024-12-02 15:40:16,356 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 15:40:16,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:40:16,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:40:16,357 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:40:16,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-12-02 15:40:16,524 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 15:40:16,525 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:40:16,526 INFO L256 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-12-02 15:40:16,527 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:40:16,955 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 15:40:16,955 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-12-02 15:40:17,032 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-02 15:40:17,032 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:40:17,812 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-12-02 15:40:17,812 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-12-02 15:40:17,831 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2024-12-02 15:40:17,831 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2024-12-02 15:40:17,841 INFO L349 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2024-12-02 15:40:17,841 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 1 [2024-12-02 15:40:17,847 INFO L349 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2024-12-02 15:40:17,847 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 1 [2024-12-02 15:40:17,849 WARN L214 Elim1Store]: Array PQE input equivalent to true [2024-12-02 15:40:17,855 INFO L349 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2024-12-02 15:40:17,855 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 1 [2024-12-02 15:40:17,862 INFO L349 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2024-12-02 15:40:17,862 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 1 [2024-12-02 15:40:17,869 INFO L349 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2024-12-02 15:40:17,869 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 1 [2024-12-02 15:40:17,930 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-12-02 15:40:17,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381469776] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 15:40:17,930 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 15:40:17,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12, 10] total 37 [2024-12-02 15:40:17,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120775732] [2024-12-02 15:40:17,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 15:40:17,931 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-12-02 15:40:17,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:40:17,931 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-12-02 15:40:17,932 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1190, Unknown=0, NotChecked=0, Total=1332 [2024-12-02 15:40:20,877 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-12-02 15:40:20,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 566 transitions, 12210 flow. Second operand has 37 states, 37 states have (on average 16.10810810810811) internal successors, (596), 37 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:40:20,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 15:40:20,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-12-02 15:40:20,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 15:40:25,747 INFO L124 PetriNetUnfolderBase]: 7381/12987 cut-off events. [2024-12-02 15:40:25,747 INFO L125 PetriNetUnfolderBase]: For 262910/263212 co-relation queries the response was YES. [2024-12-02 15:40:25,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98247 conditions, 12987 events. 7381/12987 cut-off events. For 262910/263212 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 88969 event pairs, 3765 based on Foata normal form. 1/12988 useless extension candidates. Maximal degree in co-relation 98060. Up to 10590 conditions per place. [2024-12-02 15:40:25,896 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 497 selfloop transitions, 112 changer transitions 1/614 dead transitions. [2024-12-02 15:40:25,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 614 transitions, 14252 flow [2024-12-02 15:40:25,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-12-02 15:40:25,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-12-02 15:40:25,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 293 transitions. [2024-12-02 15:40:25,898 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4650793650793651 [2024-12-02 15:40:25,898 INFO L175 Difference]: Start difference. First operand has 328 places, 566 transitions, 12210 flow. Second operand 15 states and 293 transitions. [2024-12-02 15:40:25,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 614 transitions, 14252 flow [2024-12-02 15:40:27,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 614 transitions, 13913 flow, removed 48 selfloop flow, removed 12 redundant places. [2024-12-02 15:40:27,218 INFO L231 Difference]: Finished difference. Result has 333 places, 583 transitions, 12697 flow [2024-12-02 15:40:27,218 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11890, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=12697, PETRI_PLACES=333, PETRI_TRANSITIONS=583} [2024-12-02 15:40:27,218 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 291 predicate places. [2024-12-02 15:40:27,218 INFO L471 AbstractCegarLoop]: Abstraction has has 333 places, 583 transitions, 12697 flow [2024-12-02 15:40:27,219 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 16.10810810810811) internal successors, (596), 37 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:40:27,219 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 15:40:27,219 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:40:27,225 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-12-02 15:40:27,419 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2024-12-02 15:40:27,419 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-12-02 15:40:27,420 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:40:27,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1768060962, now seen corresponding path program 23 times [2024-12-02 15:40:27,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:40:27,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869095496] [2024-12-02 15:40:27,420 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 15:40:27,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:40:27,484 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-12-02 15:40:27,484 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:40:29,692 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 13 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 15:40:29,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:40:29,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869095496] [2024-12-02 15:40:29,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869095496] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:40:29,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538356799] [2024-12-02 15:40:29,693 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 15:40:29,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:40:29,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:40:29,695 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:40:29,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-12-02 15:40:29,897 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-12-02 15:40:29,897 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:40:29,899 INFO L256 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-12-02 15:40:29,900 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:40:30,284 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 15:40:30,285 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-12-02 15:40:30,400 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-02 15:40:30,400 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:40:31,121 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-12-02 15:40:31,122 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-12-02 15:40:31,146 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2024-12-02 15:40:31,147 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2024-12-02 15:40:31,159 INFO L349 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2024-12-02 15:40:31,159 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 1 [2024-12-02 15:40:31,167 INFO L349 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2024-12-02 15:40:31,167 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 1 [2024-12-02 15:40:31,175 INFO L349 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2024-12-02 15:40:31,175 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 1 [2024-12-02 15:40:31,183 INFO L349 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2024-12-02 15:40:31,183 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 1 [2024-12-02 15:40:31,190 INFO L349 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2024-12-02 15:40:31,191 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 1 [2024-12-02 15:40:31,274 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-12-02 15:40:31,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538356799] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 15:40:31,274 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 15:40:31,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 12, 10] total 42 [2024-12-02 15:40:31,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586146332] [2024-12-02 15:40:31,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 15:40:31,275 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-12-02 15:40:31,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:40:31,275 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-12-02 15:40:31,275 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1550, Unknown=0, NotChecked=0, Total=1722 [2024-12-02 15:40:34,463 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-12-02 15:40:34,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 583 transitions, 12697 flow. Second operand has 42 states, 42 states have (on average 16.023809523809526) internal successors, (673), 42 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:40:34,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 15:40:34,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-12-02 15:40:34,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 15:40:39,889 INFO L124 PetriNetUnfolderBase]: 7483/13160 cut-off events. [2024-12-02 15:40:39,889 INFO L125 PetriNetUnfolderBase]: For 268061/268363 co-relation queries the response was YES. [2024-12-02 15:40:40,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99830 conditions, 13160 events. 7483/13160 cut-off events. For 268061/268363 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 90247 event pairs, 3786 based on Foata normal form. 1/13161 useless extension candidates. Maximal degree in co-relation 99639. Up to 10735 conditions per place. [2024-12-02 15:40:40,190 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 509 selfloop transitions, 116 changer transitions 1/630 dead transitions. [2024-12-02 15:40:40,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 630 transitions, 14740 flow [2024-12-02 15:40:40,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-12-02 15:40:40,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-12-02 15:40:40,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 310 transitions. [2024-12-02 15:40:40,191 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46130952380952384 [2024-12-02 15:40:40,191 INFO L175 Difference]: Start difference. First operand has 333 places, 583 transitions, 12697 flow. Second operand 16 states and 310 transitions. [2024-12-02 15:40:40,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 630 transitions, 14740 flow [2024-12-02 15:40:42,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 630 transitions, 14441 flow, removed 42 selfloop flow, removed 11 redundant places. [2024-12-02 15:40:42,111 INFO L231 Difference]: Finished difference. Result has 340 places, 597 transitions, 13164 flow [2024-12-02 15:40:42,112 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12408, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=13164, PETRI_PLACES=340, PETRI_TRANSITIONS=597} [2024-12-02 15:40:42,112 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 298 predicate places. [2024-12-02 15:40:42,112 INFO L471 AbstractCegarLoop]: Abstraction has has 340 places, 597 transitions, 13164 flow [2024-12-02 15:40:42,112 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 16.023809523809526) internal successors, (673), 42 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:40:42,112 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 15:40:42,112 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:40:42,122 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-12-02 15:40:42,313 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2024-12-02 15:40:42,313 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-12-02 15:40:42,313 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:40:42,313 INFO L85 PathProgramCache]: Analyzing trace with hash -593106780, now seen corresponding path program 24 times [2024-12-02 15:40:42,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:40:42,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281902600] [2024-12-02 15:40:42,314 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 15:40:42,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:40:42,330 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-12-02 15:40:42,330 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:40:42,699 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-12-02 15:40:42,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:40:42,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281902600] [2024-12-02 15:40:42,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281902600] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 15:40:42,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 15:40:42,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-12-02 15:40:42,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435487465] [2024-12-02 15:40:42,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 15:40:42,700 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-12-02 15:40:42,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:40:42,700 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-12-02 15:40:42,700 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-12-02 15:40:42,922 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 42 [2024-12-02 15:40:42,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 597 transitions, 13164 flow. Second operand has 10 states, 10 states have (on average 20.2) internal successors, (202), 10 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:40:42,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 15:40:42,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 42 [2024-12-02 15:40:42,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 15:40:45,962 INFO L124 PetriNetUnfolderBase]: 5672/10602 cut-off events. [2024-12-02 15:40:45,963 INFO L125 PetriNetUnfolderBase]: For 258944/259294 co-relation queries the response was YES. [2024-12-02 15:40:46,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87409 conditions, 10602 events. 5672/10602 cut-off events. For 258944/259294 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 77369 event pairs, 2664 based on Foata normal form. 38/10566 useless extension candidates. Maximal degree in co-relation 87215. Up to 8000 conditions per place. [2024-12-02 15:40:46,118 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 495 selfloop transitions, 99 changer transitions 3/622 dead transitions. [2024-12-02 15:40:46,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 622 transitions, 14670 flow [2024-12-02 15:40:46,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-12-02 15:40:46,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-12-02 15:40:46,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 218 transitions. [2024-12-02 15:40:46,120 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5767195767195767 [2024-12-02 15:40:46,120 INFO L175 Difference]: Start difference. First operand has 340 places, 597 transitions, 13164 flow. Second operand 9 states and 218 transitions. [2024-12-02 15:40:46,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 622 transitions, 14670 flow [2024-12-02 15:40:47,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 622 transitions, 14474 flow, removed 37 selfloop flow, removed 10 redundant places. [2024-12-02 15:40:47,493 INFO L231 Difference]: Finished difference. Result has 340 places, 601 transitions, 13307 flow [2024-12-02 15:40:47,494 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12968, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=499, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13307, PETRI_PLACES=340, PETRI_TRANSITIONS=601} [2024-12-02 15:40:47,494 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 298 predicate places. [2024-12-02 15:40:47,494 INFO L471 AbstractCegarLoop]: Abstraction has has 340 places, 601 transitions, 13307 flow [2024-12-02 15:40:47,494 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 20.2) internal successors, (202), 10 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:40:47,494 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 15:40:47,494 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:40:47,494 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-12-02 15:40:47,494 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-12-02 15:40:47,495 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:40:47,495 INFO L85 PathProgramCache]: Analyzing trace with hash 56710, now seen corresponding path program 25 times [2024-12-02 15:40:47,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:40:47,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766220921] [2024-12-02 15:40:47,495 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 15:40:47,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:40:47,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:40:48,067 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-02 15:40:48,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:40:48,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766220921] [2024-12-02 15:40:48,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766220921] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:40:48,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677141690] [2024-12-02 15:40:48,068 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 15:40:48,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:40:48,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:40:48,069 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:40:48,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-12-02 15:40:48,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:40:48,213 INFO L256 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-12-02 15:40:48,214 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:40:48,355 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 15:40:48,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2024-12-02 15:40:48,425 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-12-02 15:40:48,425 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:40:53,010 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2024-12-02 15:40:53,010 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2024-12-02 15:40:53,064 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-12-02 15:40:53,064 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 58 [2024-12-02 15:40:53,101 INFO L349 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2024-12-02 15:40:53,101 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 1 [2024-12-02 15:40:53,109 INFO L349 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2024-12-02 15:40:53,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 1 [2024-12-02 15:40:53,117 INFO L349 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2024-12-02 15:40:53,117 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 1 [2024-12-02 15:40:53,128 INFO L349 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2024-12-02 15:40:53,128 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 1 [2024-12-02 15:40:53,136 INFO L349 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2024-12-02 15:40:53,137 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 1 [2024-12-02 15:40:53,165 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-12-02 15:40:53,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677141690] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 15:40:53,165 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 15:40:53,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 28 [2024-12-02 15:40:53,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390964718] [2024-12-02 15:40:53,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 15:40:53,165 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-12-02 15:40:53,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:40:53,166 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-12-02 15:40:53,166 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2024-12-02 15:40:57,321 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 15:41:01,441 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 15:41:05,787 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 15:41:09,873 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 15:41:13,982 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 15:41:14,021 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-12-02 15:41:14,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 601 transitions, 13307 flow. Second operand has 28 states, 28 states have (on average 13.142857142857142) internal successors, (368), 28 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:41:14,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 15:41:14,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-12-02 15:41:14,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 15:41:18,332 INFO L124 PetriNetUnfolderBase]: 8157/14093 cut-off events. [2024-12-02 15:41:18,332 INFO L125 PetriNetUnfolderBase]: For 295640/295688 co-relation queries the response was YES. [2024-12-02 15:41:18,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106712 conditions, 14093 events. 8157/14093 cut-off events. For 295640/295688 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 95221 event pairs, 4303 based on Foata normal form. 1/14094 useless extension candidates. Maximal degree in co-relation 106522. Up to 11878 conditions per place. [2024-12-02 15:41:18,612 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 533 selfloop transitions, 111 changer transitions 3/649 dead transitions. [2024-12-02 15:41:18,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 649 transitions, 15399 flow [2024-12-02 15:41:18,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-12-02 15:41:18,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-12-02 15:41:18,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 235 transitions. [2024-12-02 15:41:18,613 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39965986394557823 [2024-12-02 15:41:18,613 INFO L175 Difference]: Start difference. First operand has 340 places, 601 transitions, 13307 flow. Second operand 14 states and 235 transitions. [2024-12-02 15:41:18,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 649 transitions, 15399 flow [2024-12-02 15:41:20,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 649 transitions, 15161 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-12-02 15:41:20,737 INFO L231 Difference]: Finished difference. Result has 351 places, 612 transitions, 13789 flow [2024-12-02 15:41:20,738 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13069, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=13789, PETRI_PLACES=351, PETRI_TRANSITIONS=612} [2024-12-02 15:41:20,738 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 309 predicate places. [2024-12-02 15:41:20,738 INFO L471 AbstractCegarLoop]: Abstraction has has 351 places, 612 transitions, 13789 flow [2024-12-02 15:41:20,738 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 13.142857142857142) internal successors, (368), 28 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:41:20,738 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 15:41:20,738 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:41:20,745 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-12-02 15:41:20,938 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:41:20,939 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-12-02 15:41:20,939 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:41:20,939 INFO L85 PathProgramCache]: Analyzing trace with hash 875886256, now seen corresponding path program 26 times [2024-12-02 15:41:20,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:41:20,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099059292] [2024-12-02 15:41:20,939 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 15:41:20,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:41:20,960 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 15:41:20,960 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:41:21,790 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-12-02 15:41:21,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:41:21,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099059292] [2024-12-02 15:41:21,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099059292] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:41:21,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510262366] [2024-12-02 15:41:21,790 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 15:41:21,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:41:21,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:41:21,791 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:41:21,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-12-02 15:41:21,934 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 15:41:21,934 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:41:21,936 INFO L256 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-12-02 15:41:21,937 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:41:22,061 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 15:41:22,061 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2024-12-02 15:41:22,126 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-12-02 15:41:22,126 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:41:34,734 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2024-12-02 15:41:34,734 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2024-12-02 15:41:34,796 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-12-02 15:41:34,796 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 58 [2024-12-02 15:41:34,839 INFO L349 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2024-12-02 15:41:34,839 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 1 [2024-12-02 15:41:34,850 INFO L349 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2024-12-02 15:41:34,850 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 1 [2024-12-02 15:41:34,859 INFO L349 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2024-12-02 15:41:34,859 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 1 [2024-12-02 15:41:34,869 INFO L349 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2024-12-02 15:41:34,869 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 1 [2024-12-02 15:41:34,878 INFO L349 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2024-12-02 15:41:34,878 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 1 [2024-12-02 15:41:34,911 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-12-02 15:41:34,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510262366] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 15:41:34,911 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 15:41:34,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10, 10] total 35 [2024-12-02 15:41:34,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763269210] [2024-12-02 15:41:34,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 15:41:34,912 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-12-02 15:41:34,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:41:34,912 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-12-02 15:41:34,912 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1020, Unknown=3, NotChecked=0, Total=1190 [2024-12-02 15:41:39,182 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 15:41:43,286 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 15:41:47,378 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 15:41:51,560 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 15:41:52,012 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-12-02 15:41:52,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 612 transitions, 13789 flow. Second operand has 35 states, 35 states have (on average 13.942857142857143) internal successors, (488), 35 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:41:52,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 15:41:52,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-12-02 15:41:52,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 15:41:56,594 INFO L124 PetriNetUnfolderBase]: 7901/13730 cut-off events. [2024-12-02 15:41:56,594 INFO L125 PetriNetUnfolderBase]: For 306659/306941 co-relation queries the response was YES. [2024-12-02 15:41:56,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105854 conditions, 13730 events. 7901/13730 cut-off events. For 306659/306941 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 93287 event pairs, 4036 based on Foata normal form. 1/13731 useless extension candidates. Maximal degree in co-relation 105660. Up to 11351 conditions per place. [2024-12-02 15:41:56,843 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 534 selfloop transitions, 118 changer transitions 2/657 dead transitions. [2024-12-02 15:41:56,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 657 transitions, 15880 flow [2024-12-02 15:41:56,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-12-02 15:41:56,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-12-02 15:41:56,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 264 transitions. [2024-12-02 15:41:56,844 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-12-02 15:41:56,844 INFO L175 Difference]: Start difference. First operand has 351 places, 612 transitions, 13789 flow. Second operand 15 states and 264 transitions. [2024-12-02 15:41:56,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 657 transitions, 15880 flow [2024-12-02 15:41:58,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 657 transitions, 15538 flow, removed 77 selfloop flow, removed 10 redundant places. [2024-12-02 15:41:58,920 INFO L231 Difference]: Finished difference. Result has 357 places, 622 transitions, 14192 flow [2024-12-02 15:41:58,920 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13447, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=612, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=496, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=14192, PETRI_PLACES=357, PETRI_TRANSITIONS=622} [2024-12-02 15:41:58,920 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 315 predicate places. [2024-12-02 15:41:58,920 INFO L471 AbstractCegarLoop]: Abstraction has has 357 places, 622 transitions, 14192 flow [2024-12-02 15:41:58,920 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 13.942857142857143) internal successors, (488), 35 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:41:58,921 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 15:41:58,921 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:41:58,926 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-12-02 15:41:59,121 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2024-12-02 15:41:59,121 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-12-02 15:41:59,122 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:41:59,122 INFO L85 PathProgramCache]: Analyzing trace with hash -727849448, now seen corresponding path program 27 times [2024-12-02 15:41:59,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:41:59,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22870645] [2024-12-02 15:41:59,122 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 15:41:59,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:41:59,137 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-12-02 15:41:59,137 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:41:59,526 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-02 15:41:59,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:41:59,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22870645] [2024-12-02 15:41:59,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22870645] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:41:59,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708223119] [2024-12-02 15:41:59,526 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 15:41:59,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:41:59,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:41:59,528 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:41:59,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-12-02 15:41:59,653 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-12-02 15:41:59,653 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:41:59,654 INFO L256 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-12-02 15:41:59,655 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:41:59,804 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 15:41:59,805 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2024-12-02 15:41:59,886 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-12-02 15:41:59,886 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:42:12,534 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2024-12-02 15:42:12,534 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2024-12-02 15:42:12,591 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-12-02 15:42:12,591 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 58 [2024-12-02 15:42:12,628 INFO L349 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2024-12-02 15:42:12,628 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 1 [2024-12-02 15:42:12,637 INFO L349 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2024-12-02 15:42:12,638 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 1 [2024-12-02 15:42:12,645 INFO L349 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2024-12-02 15:42:12,645 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 1 [2024-12-02 15:42:12,654 INFO L349 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2024-12-02 15:42:12,654 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 1 [2024-12-02 15:42:12,661 INFO L349 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2024-12-02 15:42:12,661 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 1 [2024-12-02 15:42:12,695 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-12-02 15:42:12,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708223119] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 15:42:12,695 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 15:42:12,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 28 [2024-12-02 15:42:12,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18963827] [2024-12-02 15:42:12,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 15:42:12,696 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-12-02 15:42:12,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:42:12,696 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-12-02 15:42:12,696 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=640, Unknown=2, NotChecked=0, Total=756 [2024-12-02 15:42:16,705 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 15:42:20,752 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 15:42:24,786 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 15:42:28,823 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 15:42:32,851 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 15:42:36,887 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 15:42:40,926 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 15:42:44,968 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 15:42:49,022 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 15:42:53,074 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 15:42:57,103 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 15:43:01,143 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 15:43:05,156 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 15:43:05,157 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-12-02 15:43:05,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 622 transitions, 14192 flow. Second operand has 28 states, 28 states have (on average 8.142857142857142) internal successors, (228), 28 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:43:05,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 15:43:05,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-12-02 15:43:05,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 15:43:10,165 INFO L124 PetriNetUnfolderBase]: 8553/14608 cut-off events. [2024-12-02 15:43:10,165 INFO L125 PetriNetUnfolderBase]: For 324560/324560 co-relation queries the response was YES. [2024-12-02 15:43:10,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112221 conditions, 14608 events. 8553/14608 cut-off events. For 324560/324560 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 97747 event pairs, 4575 based on Foata normal form. 1/14609 useless extension candidates. Maximal degree in co-relation 112022. Up to 12455 conditions per place. [2024-12-02 15:43:10,385 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 545 selfloop transitions, 113 changer transitions 2/661 dead transitions. [2024-12-02 15:43:10,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 661 transitions, 15968 flow [2024-12-02 15:43:10,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-12-02 15:43:10,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-12-02 15:43:10,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 165 transitions. [2024-12-02 15:43:10,386 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.28061224489795916 [2024-12-02 15:43:10,386 INFO L175 Difference]: Start difference. First operand has 357 places, 622 transitions, 14192 flow. Second operand 14 states and 165 transitions. [2024-12-02 15:43:10,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 661 transitions, 15968 flow [2024-12-02 15:43:12,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 661 transitions, 15635 flow, removed 100 selfloop flow, removed 11 redundant places. [2024-12-02 15:43:12,648 INFO L231 Difference]: Finished difference. Result has 361 places, 626 transitions, 14262 flow [2024-12-02 15:43:12,649 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13859, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=14262, PETRI_PLACES=361, PETRI_TRANSITIONS=626} [2024-12-02 15:43:12,649 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 319 predicate places. [2024-12-02 15:43:12,649 INFO L471 AbstractCegarLoop]: Abstraction has has 361 places, 626 transitions, 14262 flow [2024-12-02 15:43:12,649 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 8.142857142857142) internal successors, (228), 28 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:43:12,649 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 15:43:12,649 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:43:12,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2024-12-02 15:43:12,849 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-12-02 15:43:12,850 INFO L396 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-12-02 15:43:12,850 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:43:12,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1470651532, now seen corresponding path program 28 times [2024-12-02 15:43:12,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:43:12,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052083874] [2024-12-02 15:43:12,851 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 15:43:12,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:43:12,879 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 15:43:12,879 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:43:13,705 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-02 15:43:13,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:43:13,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052083874] [2024-12-02 15:43:13,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052083874] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:43:13,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016570900] [2024-12-02 15:43:13,706 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 15:43:13,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:43:13,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:43:13,707 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:43:13,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-12-02 15:43:13,881 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 15:43:13,882 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:43:13,883 INFO L256 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-12-02 15:43:13,885 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:43:14,302 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 15:43:14,302 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-12-02 15:43:14,429 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-02 15:43:14,429 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:43:15,313 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-12-02 15:43:15,313 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-12-02 15:43:15,336 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2024-12-02 15:43:15,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2024-12-02 15:43:15,349 INFO L349 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2024-12-02 15:43:15,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 1 [2024-12-02 15:43:15,361 INFO L349 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2024-12-02 15:43:15,361 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 1 [2024-12-02 15:43:15,371 INFO L349 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2024-12-02 15:43:15,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 1 [2024-12-02 15:43:15,381 INFO L349 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2024-12-02 15:43:15,381 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 1 [2024-12-02 15:43:15,391 INFO L349 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2024-12-02 15:43:15,391 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 1 [2024-12-02 15:43:15,476 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-12-02 15:43:15,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016570900] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 15:43:15,477 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 15:43:15,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 10] total 31 [2024-12-02 15:43:15,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877686182] [2024-12-02 15:43:15,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 15:43:15,477 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-12-02 15:43:15,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:43:15,478 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-12-02 15:43:15,478 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2024-12-02 15:43:17,280 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-12-02 15:43:17,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 626 transitions, 14262 flow. Second operand has 31 states, 31 states have (on average 18.322580645161292) internal successors, (568), 31 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:43:17,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 15:43:17,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-12-02 15:43:17,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 15:43:22,835 INFO L124 PetriNetUnfolderBase]: 7631/13437 cut-off events. [2024-12-02 15:43:22,835 INFO L125 PetriNetUnfolderBase]: For 301757/302059 co-relation queries the response was YES. [2024-12-02 15:43:23,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104525 conditions, 13437 events. 7631/13437 cut-off events. For 301757/302059 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 92937 event pairs, 3833 based on Foata normal form. 1/13438 useless extension candidates. Maximal degree in co-relation 104327. Up to 10981 conditions per place. [2024-12-02 15:43:23,287 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 538 selfloop transitions, 125 changer transitions 4/671 dead transitions. [2024-12-02 15:43:23,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 671 transitions, 16058 flow [2024-12-02 15:43:23,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-12-02 15:43:23,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-12-02 15:43:23,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 346 transitions. [2024-12-02 15:43:23,288 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5148809523809523 [2024-12-02 15:43:23,288 INFO L175 Difference]: Start difference. First operand has 361 places, 626 transitions, 14262 flow. Second operand 16 states and 346 transitions. [2024-12-02 15:43:23,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 671 transitions, 16058 flow [2024-12-02 15:43:25,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 671 transitions, 15720 flow, removed 63 selfloop flow, removed 11 redundant places. [2024-12-02 15:43:25,010 INFO L231 Difference]: Finished difference. Result has 367 places, 628 transitions, 14281 flow [2024-12-02 15:43:25,011 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13924, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=502, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=14281, PETRI_PLACES=367, PETRI_TRANSITIONS=628} [2024-12-02 15:43:25,011 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 325 predicate places. [2024-12-02 15:43:25,011 INFO L471 AbstractCegarLoop]: Abstraction has has 367 places, 628 transitions, 14281 flow [2024-12-02 15:43:25,012 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 18.322580645161292) internal successors, (568), 31 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:43:25,012 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 15:43:25,012 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:43:25,018 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-12-02 15:43:25,212 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:43:25,212 INFO L396 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-12-02 15:43:25,214 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:43:25,214 INFO L85 PathProgramCache]: Analyzing trace with hash 689628502, now seen corresponding path program 29 times [2024-12-02 15:43:25,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:43:25,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693300221] [2024-12-02 15:43:25,214 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 15:43:25,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:43:25,251 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-12-02 15:43:25,251 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:43:26,204 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-12-02 15:43:26,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:43:26,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693300221] [2024-12-02 15:43:26,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693300221] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:43:26,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412948115] [2024-12-02 15:43:26,204 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 15:43:26,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:43:26,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:43:26,205 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:43:26,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-12-02 15:43:26,425 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-12-02 15:43:26,425 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:43:26,427 INFO L256 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-12-02 15:43:26,428 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:43:26,776 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 15:43:26,776 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-12-02 15:43:26,833 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-02 15:43:26,833 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 15:43:26,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412948115] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 15:43:26,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 15:43:26,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [13] total 22 [2024-12-02 15:43:26,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812144435] [2024-12-02 15:43:26,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 15:43:26,833 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-12-02 15:43:26,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:43:26,833 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-12-02 15:43:26,834 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2024-12-02 15:43:27,065 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 42 [2024-12-02 15:43:27,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 628 transitions, 14281 flow. Second operand has 13 states, 13 states have (on average 19.692307692307693) internal successors, (256), 13 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:43:27,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 15:43:27,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 42 [2024-12-02 15:43:27,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 15:43:30,088 INFO L124 PetriNetUnfolderBase]: 5781/10808 cut-off events. [2024-12-02 15:43:30,088 INFO L125 PetriNetUnfolderBase]: For 291563/291924 co-relation queries the response was YES. [2024-12-02 15:43:30,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92089 conditions, 10808 events. 5781/10808 cut-off events. For 291563/291924 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 79355 event pairs, 2314 based on Foata normal form. 40/10774 useless extension candidates. Maximal degree in co-relation 91888. Up to 8114 conditions per place. [2024-12-02 15:43:30,278 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 523 selfloop transitions, 120 changer transitions 1/670 dead transitions. [2024-12-02 15:43:30,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 670 transitions, 16341 flow [2024-12-02 15:43:30,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-12-02 15:43:30,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-12-02 15:43:30,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 260 transitions. [2024-12-02 15:43:30,280 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5627705627705628 [2024-12-02 15:43:30,280 INFO L175 Difference]: Start difference. First operand has 367 places, 628 transitions, 14281 flow. Second operand 11 states and 260 transitions. [2024-12-02 15:43:30,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 670 transitions, 16341 flow [2024-12-02 15:43:32,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 670 transitions, 16080 flow, removed 20 selfloop flow, removed 12 redundant places. [2024-12-02 15:43:32,271 INFO L231 Difference]: Finished difference. Result has 367 places, 637 transitions, 14709 flow [2024-12-02 15:43:32,271 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14020, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=14709, PETRI_PLACES=367, PETRI_TRANSITIONS=637} [2024-12-02 15:43:32,272 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 325 predicate places. [2024-12-02 15:43:32,272 INFO L471 AbstractCegarLoop]: Abstraction has has 367 places, 637 transitions, 14709 flow [2024-12-02 15:43:32,272 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 19.692307692307693) internal successors, (256), 13 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:43:32,272 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 15:43:32,272 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:43:32,278 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-12-02 15:43:32,472 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:43:32,472 INFO L396 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-12-02 15:43:32,473 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:43:32,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1886995088, now seen corresponding path program 30 times [2024-12-02 15:43:32,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:43:32,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864529361] [2024-12-02 15:43:32,473 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 15:43:32,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:43:32,485 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-12-02 15:43:32,485 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:43:32,874 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-12-02 15:43:32,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:43:32,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864529361] [2024-12-02 15:43:32,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864529361] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 15:43:32,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 15:43:32,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-12-02 15:43:32,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718417169] [2024-12-02 15:43:32,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 15:43:32,874 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-12-02 15:43:32,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:43:32,874 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-12-02 15:43:32,874 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-12-02 15:43:33,159 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 42 [2024-12-02 15:43:33,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 637 transitions, 14709 flow. Second operand has 10 states, 10 states have (on average 20.2) internal successors, (202), 10 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:43:33,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 15:43:33,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 42 [2024-12-02 15:43:33,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 15:43:36,354 INFO L124 PetriNetUnfolderBase]: 5778/10780 cut-off events. [2024-12-02 15:43:36,354 INFO L125 PetriNetUnfolderBase]: For 300007/300369 co-relation queries the response was YES. [2024-12-02 15:43:36,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92630 conditions, 10780 events. 5778/10780 cut-off events. For 300007/300369 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 79141 event pairs, 2651 based on Foata normal form. 40/10723 useless extension candidates. Maximal degree in co-relation 92428. Up to 8136 conditions per place. [2024-12-02 15:43:36,572 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 527 selfloop transitions, 117 changer transitions 4/674 dead transitions. [2024-12-02 15:43:36,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 674 transitions, 16471 flow [2024-12-02 15:43:36,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-12-02 15:43:36,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-12-02 15:43:36,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 225 transitions. [2024-12-02 15:43:36,573 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-12-02 15:43:36,573 INFO L175 Difference]: Start difference. First operand has 367 places, 637 transitions, 14709 flow. Second operand 9 states and 225 transitions. [2024-12-02 15:43:36,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 674 transitions, 16471 flow [2024-12-02 15:43:38,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 674 transitions, 16115 flow, removed 65 selfloop flow, removed 8 redundant places. [2024-12-02 15:43:38,715 INFO L231 Difference]: Finished difference. Result has 368 places, 638 transitions, 14655 flow [2024-12-02 15:43:38,716 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14353, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=520, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14655, PETRI_PLACES=368, PETRI_TRANSITIONS=638} [2024-12-02 15:43:38,716 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 326 predicate places. [2024-12-02 15:43:38,716 INFO L471 AbstractCegarLoop]: Abstraction has has 368 places, 638 transitions, 14655 flow [2024-12-02 15:43:38,716 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 20.2) internal successors, (202), 10 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:43:38,716 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 15:43:38,716 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:43:38,716 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-12-02 15:43:38,716 INFO L396 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-12-02 15:43:38,717 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:43:38,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1181670942, now seen corresponding path program 31 times [2024-12-02 15:43:38,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:43:38,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67677153] [2024-12-02 15:43:38,717 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 15:43:38,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:43:38,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:43:39,291 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-02 15:43:39,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:43:39,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67677153] [2024-12-02 15:43:39,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67677153] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:43:39,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180427616] [2024-12-02 15:43:39,292 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 15:43:39,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:43:39,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:43:39,293 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:43:39,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-12-02 15:43:39,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:43:39,440 INFO L256 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-12-02 15:43:39,441 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:43:39,579 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 15:43:39,579 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2024-12-02 15:43:39,658 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-12-02 15:43:39,659 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:44:04,589 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-12-02 15:44:04,589 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 50 [2024-12-02 15:44:04,623 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-12-02 15:44:04,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180427616] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 15:44:04,624 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 15:44:04,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 28 [2024-12-02 15:44:04,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189821268] [2024-12-02 15:44:04,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 15:44:04,624 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-12-02 15:44:04,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:44:04,624 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-12-02 15:44:04,625 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=632, Unknown=4, NotChecked=0, Total=756 [2024-12-02 15:44:08,634 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 15:44:12,693 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 15:44:16,727 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 15:44:20,768 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 15:44:24,804 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 15:44:28,854 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 15:44:32,897 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 15:44:36,951 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 15:44:40,984 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 15:44:45,016 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 15:44:49,044 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 15:44:53,104 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 15:44:57,121 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 15:44:57,121 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-12-02 15:44:57,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 638 transitions, 14655 flow. Second operand has 28 states, 28 states have (on average 8.142857142857142) internal successors, (228), 28 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:44:57,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 15:44:57,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-12-02 15:44:57,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 15:45:02,197 INFO L124 PetriNetUnfolderBase]: 8571/14660 cut-off events. [2024-12-02 15:45:02,197 INFO L125 PetriNetUnfolderBase]: For 337112/337112 co-relation queries the response was YES. [2024-12-02 15:45:02,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114435 conditions, 14660 events. 8571/14660 cut-off events. For 337112/337112 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 98422 event pairs, 4490 based on Foata normal form. 1/14661 useless extension candidates. Maximal degree in co-relation 114233. Up to 12518 conditions per place. [2024-12-02 15:45:02,540 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 565 selfloop transitions, 123 changer transitions 3/692 dead transitions. [2024-12-02 15:45:02,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 692 transitions, 16629 flow [2024-12-02 15:45:02,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-12-02 15:45:02,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-12-02 15:45:02,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 161 transitions. [2024-12-02 15:45:02,541 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.2948717948717949 [2024-12-02 15:45:02,541 INFO L175 Difference]: Start difference. First operand has 368 places, 638 transitions, 14655 flow. Second operand 13 states and 161 transitions. [2024-12-02 15:45:02,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 692 transitions, 16629 flow [2024-12-02 15:45:05,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 692 transitions, 16367 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-12-02 15:45:05,035 INFO L231 Difference]: Finished difference. Result has 375 places, 642 transitions, 14793 flow [2024-12-02 15:45:05,035 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14393, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=14793, PETRI_PLACES=375, PETRI_TRANSITIONS=642} [2024-12-02 15:45:05,035 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 333 predicate places. [2024-12-02 15:45:05,035 INFO L471 AbstractCegarLoop]: Abstraction has has 375 places, 642 transitions, 14793 flow [2024-12-02 15:45:05,035 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 8.142857142857142) internal successors, (228), 28 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:45:05,036 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 15:45:05,036 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:45:05,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2024-12-02 15:45:05,236 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2024-12-02 15:45:05,236 INFO L396 AbstractCegarLoop]: === Iteration 55 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-12-02 15:45:05,237 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:45:05,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1612177938, now seen corresponding path program 2 times [2024-12-02 15:45:05,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:45:05,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306282131] [2024-12-02 15:45:05,237 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 15:45:05,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:45:05,258 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 15:45:05,258 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:45:05,609 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-12-02 15:45:05,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:45:05,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306282131] [2024-12-02 15:45:05,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306282131] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:45:05,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509167922] [2024-12-02 15:45:05,610 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 15:45:05,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:45:05,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:45:05,611 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:45:05,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-12-02 15:45:05,778 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 15:45:05,778 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:45:05,781 INFO L256 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-12-02 15:45:05,782 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:45:05,787 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 8 treesize of output 1 [2024-12-02 15:45:05,789 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 [2024-12-02 15:45:05,896 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-12-02 15:45:05,896 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-12-02 15:45:05,917 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-12-02 15:45:05,917 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 [2024-12-02 15:45:06,706 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 21 proven. 35 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-12-02 15:45:06,706 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:45:07,565 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 26 proven. 30 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-12-02 15:45:07,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509167922] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 15:45:07,565 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 15:45:07,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 34 [2024-12-02 15:45:07,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297568102] [2024-12-02 15:45:07,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 15:45:07,565 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-12-02 15:45:07,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:45:07,566 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-12-02 15:45:07,566 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1049, Unknown=0, NotChecked=0, Total=1260 [2024-12-02 15:45:10,032 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-12-02 15:45:10,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 642 transitions, 14793 flow. Second operand has 36 states, 36 states have (on average 17.666666666666668) internal successors, (636), 36 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:45:10,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 15:45:10,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-12-02 15:45:10,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 15:45:13,978 INFO L124 PetriNetUnfolderBase]: 4592/8719 cut-off events. [2024-12-02 15:45:13,979 INFO L125 PetriNetUnfolderBase]: For 263128/264540 co-relation queries the response was YES. [2024-12-02 15:45:14,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77480 conditions, 8719 events. 4592/8719 cut-off events. For 263128/264540 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 62525 event pairs, 609 based on Foata normal form. 368/8859 useless extension candidates. Maximal degree in co-relation 77275. Up to 2583 conditions per place. [2024-12-02 15:45:14,184 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 597 selfloop transitions, 256 changer transitions 0/886 dead transitions. [2024-12-02 15:45:14,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 886 transitions, 21645 flow [2024-12-02 15:45:14,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-12-02 15:45:14,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-12-02 15:45:14,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 334 transitions. [2024-12-02 15:45:14,185 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49702380952380953 [2024-12-02 15:45:14,185 INFO L175 Difference]: Start difference. First operand has 375 places, 642 transitions, 14793 flow. Second operand 16 states and 334 transitions. [2024-12-02 15:45:14,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 886 transitions, 21645 flow [2024-12-02 15:45:15,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 886 transitions, 20917 flow, removed 35 selfloop flow, removed 13 redundant places. [2024-12-02 15:45:16,007 INFO L231 Difference]: Finished difference. Result has 377 places, 652 transitions, 14795 flow [2024-12-02 15:45:16,007 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14055, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=245, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=14795, PETRI_PLACES=377, PETRI_TRANSITIONS=652} [2024-12-02 15:45:16,008 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 335 predicate places. [2024-12-02 15:45:16,008 INFO L471 AbstractCegarLoop]: Abstraction has has 377 places, 652 transitions, 14795 flow [2024-12-02 15:45:16,008 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 17.666666666666668) internal successors, (636), 36 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:45:16,008 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 15:45:16,008 INFO L206 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2024-12-02 15:45:16,014 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-12-02 15:45:16,208 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2024-12-02 15:45:16,208 INFO L396 AbstractCegarLoop]: === Iteration 56 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-12-02 15:45:16,209 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:45:16,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1420607434, now seen corresponding path program 2 times [2024-12-02 15:45:16,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:45:16,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868170016] [2024-12-02 15:45:16,209 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 15:45:16,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:45:16,226 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 15:45:16,226 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:45:16,313 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-12-02 15:45:16,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:45:16,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868170016] [2024-12-02 15:45:16,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868170016] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 15:45:16,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 15:45:16,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-12-02 15:45:16,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933419946] [2024-12-02 15:45:16,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 15:45:16,314 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-12-02 15:45:16,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:45:16,314 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-12-02 15:45:16,314 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-12-02 15:45:16,339 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-12-02 15:45:16,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 652 transitions, 14795 flow. Second operand has 8 states, 8 states have (on average 21.5) internal successors, (172), 8 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:45:16,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 15:45:16,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-12-02 15:45:16,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 15:45:18,447 INFO L124 PetriNetUnfolderBase]: 3069/6393 cut-off events. [2024-12-02 15:45:18,447 INFO L125 PetriNetUnfolderBase]: For 228070/229563 co-relation queries the response was YES. [2024-12-02 15:45:18,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59569 conditions, 6393 events. 3069/6393 cut-off events. For 228070/229563 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 48283 event pairs, 197 based on Foata normal form. 114/6377 useless extension candidates. Maximal degree in co-relation 59365. Up to 1839 conditions per place. [2024-12-02 15:45:18,546 INFO L140 encePairwiseOnDemand]: 39/42 looper letters, 544 selfloop transitions, 247 changer transitions 0/849 dead transitions. [2024-12-02 15:45:18,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 849 transitions, 21356 flow [2024-12-02 15:45:18,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-12-02 15:45:18,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-12-02 15:45:18,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 234 transitions. [2024-12-02 15:45:18,547 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6964285714285714 [2024-12-02 15:45:18,547 INFO L175 Difference]: Start difference. First operand has 377 places, 652 transitions, 14795 flow. Second operand 8 states and 234 transitions. [2024-12-02 15:45:18,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 849 transitions, 21356 flow [2024-12-02 15:45:19,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 849 transitions, 20234 flow, removed 0 selfloop flow, removed 17 redundant places. [2024-12-02 15:45:19,642 INFO L231 Difference]: Finished difference. Result has 365 places, 635 transitions, 14059 flow [2024-12-02 15:45:19,642 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13565, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=247, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14059, PETRI_PLACES=365, PETRI_TRANSITIONS=635} [2024-12-02 15:45:19,642 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 323 predicate places. [2024-12-02 15:45:19,642 INFO L471 AbstractCegarLoop]: Abstraction has has 365 places, 635 transitions, 14059 flow [2024-12-02 15:45:19,642 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.5) internal successors, (172), 8 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:45:19,642 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 15:45:19,642 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:45:19,643 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-12-02 15:45:19,643 INFO L396 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-12-02 15:45:19,643 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:45:19,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1845097908, now seen corresponding path program 32 times [2024-12-02 15:45:19,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:45:19,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94758501] [2024-12-02 15:45:19,643 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 15:45:19,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:45:19,672 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 15:45:19,672 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:45:20,218 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-02 15:45:20,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:45:20,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94758501] [2024-12-02 15:45:20,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94758501] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:45:20,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524774586] [2024-12-02 15:45:20,218 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 15:45:20,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:45:20,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:45:20,220 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:45:20,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-12-02 15:45:20,379 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 15:45:20,380 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:45:20,381 INFO L256 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-12-02 15:45:20,383 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:45:20,727 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-02 15:45:20,727 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:45:20,988 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-12-02 15:45:20,989 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-12-02 15:45:21,003 INFO L349 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2024-12-02 15:45:21,003 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2024-12-02 15:45:21,125 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-12-02 15:45:21,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524774586] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 15:45:21,125 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 15:45:21,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 10] total 29 [2024-12-02 15:45:21,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075119497] [2024-12-02 15:45:21,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 15:45:21,125 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-12-02 15:45:21,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:45:21,126 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-12-02 15:45:21,126 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2024-12-02 15:45:22,293 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-12-02 15:45:22,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 635 transitions, 14059 flow. Second operand has 29 states, 29 states have (on average 18.482758620689655) internal successors, (536), 29 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:45:22,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 15:45:22,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-12-02 15:45:22,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 15:45:27,285 INFO L124 PetriNetUnfolderBase]: 7718/13399 cut-off events. [2024-12-02 15:45:27,285 INFO L125 PetriNetUnfolderBase]: For 326112/326415 co-relation queries the response was YES. [2024-12-02 15:45:27,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107350 conditions, 13399 events. 7718/13399 cut-off events. For 326112/326415 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 92585 event pairs, 2310 based on Foata normal form. 52/13451 useless extension candidates. Maximal degree in co-relation 107154. Up to 5724 conditions per place. [2024-12-02 15:45:27,459 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 517 selfloop transitions, 316 changer transitions 0/835 dead transitions. [2024-12-02 15:45:27,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 835 transitions, 19124 flow [2024-12-02 15:45:27,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-12-02 15:45:27,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-12-02 15:45:27,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 437 transitions. [2024-12-02 15:45:27,461 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5202380952380953 [2024-12-02 15:45:27,461 INFO L175 Difference]: Start difference. First operand has 365 places, 635 transitions, 14059 flow. Second operand 20 states and 437 transitions. [2024-12-02 15:45:27,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 835 transitions, 19124 flow [2024-12-02 15:45:29,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 835 transitions, 18615 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-12-02 15:45:29,407 INFO L231 Difference]: Finished difference. Result has 384 places, 665 transitions, 15244 flow [2024-12-02 15:45:29,408 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13580, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=286, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=15244, PETRI_PLACES=384, PETRI_TRANSITIONS=665} [2024-12-02 15:45:29,408 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 342 predicate places. [2024-12-02 15:45:29,408 INFO L471 AbstractCegarLoop]: Abstraction has has 384 places, 665 transitions, 15244 flow [2024-12-02 15:45:29,408 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 18.482758620689655) internal successors, (536), 29 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:45:29,408 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 15:45:29,408 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:45:29,414 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2024-12-02 15:45:29,608 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:45:29,608 INFO L396 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-12-02 15:45:29,609 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:45:29,609 INFO L85 PathProgramCache]: Analyzing trace with hash -919815487, now seen corresponding path program 33 times [2024-12-02 15:45:29,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:45:29,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169869386] [2024-12-02 15:45:29,609 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 15:45:29,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:45:29,628 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-12-02 15:45:29,628 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:45:30,036 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-02 15:45:30,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:45:30,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169869386] [2024-12-02 15:45:30,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169869386] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:45:30,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568587272] [2024-12-02 15:45:30,036 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 15:45:30,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:45:30,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:45:30,038 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:45:30,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-12-02 15:45:30,191 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-12-02 15:45:30,191 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:45:30,192 INFO L256 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-12-02 15:45:30,193 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:45:30,705 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-02 15:45:30,705 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:45:31,030 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-12-02 15:45:31,030 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-12-02 15:45:31,104 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-12-02 15:45:31,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568587272] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 15:45:31,104 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 15:45:31,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 10] total 30 [2024-12-02 15:45:31,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25096043] [2024-12-02 15:45:31,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 15:45:31,105 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-12-02 15:45:31,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:45:31,105 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-12-02 15:45:31,105 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2024-12-02 15:45:32,256 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-12-02 15:45:32,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 665 transitions, 15244 flow. Second operand has 30 states, 30 states have (on average 18.466666666666665) internal successors, (554), 30 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:45:32,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 15:45:32,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-12-02 15:45:32,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 15:45:38,510 INFO L124 PetriNetUnfolderBase]: 10064/17551 cut-off events. [2024-12-02 15:45:38,510 INFO L125 PetriNetUnfolderBase]: For 465487/465733 co-relation queries the response was YES. [2024-12-02 15:45:38,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143677 conditions, 17551 events. 10064/17551 cut-off events. For 465487/465733 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 125897 event pairs, 1489 based on Foata normal form. 80/17631 useless extension candidates. Maximal degree in co-relation 143474. Up to 3968 conditions per place. [2024-12-02 15:45:38,712 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 344 selfloop transitions, 665 changer transitions 0/1011 dead transitions. [2024-12-02 15:45:38,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 1011 transitions, 23063 flow [2024-12-02 15:45:38,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-12-02 15:45:38,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-12-02 15:45:38,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 616 transitions. [2024-12-02 15:45:38,714 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5432098765432098 [2024-12-02 15:45:38,714 INFO L175 Difference]: Start difference. First operand has 384 places, 665 transitions, 15244 flow. Second operand 27 states and 616 transitions. [2024-12-02 15:45:38,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 1011 transitions, 23063 flow [2024-12-02 15:45:41,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 1011 transitions, 22688 flow, removed 138 selfloop flow, removed 4 redundant places. [2024-12-02 15:45:41,362 INFO L231 Difference]: Finished difference. Result has 415 places, 836 transitions, 20235 flow [2024-12-02 15:45:41,363 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14894, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=503, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=20235, PETRI_PLACES=415, PETRI_TRANSITIONS=836} [2024-12-02 15:45:41,363 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 373 predicate places. [2024-12-02 15:45:41,363 INFO L471 AbstractCegarLoop]: Abstraction has has 415 places, 836 transitions, 20235 flow [2024-12-02 15:45:41,363 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 18.466666666666665) internal successors, (554), 30 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:45:41,363 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 15:45:41,363 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:45:41,369 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2024-12-02 15:45:41,564 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:45:41,564 INFO L396 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-12-02 15:45:41,564 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:45:41,564 INFO L85 PathProgramCache]: Analyzing trace with hash 2030218509, now seen corresponding path program 34 times [2024-12-02 15:45:41,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:45:41,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793744031] [2024-12-02 15:45:41,564 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 15:45:41,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:45:41,589 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 15:45:41,589 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:45:42,447 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-12-02 15:45:42,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:45:42,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793744031] [2024-12-02 15:45:42,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793744031] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:45:42,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908362283] [2024-12-02 15:45:42,447 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 15:45:42,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:45:42,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:45:42,449 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:45:42,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-12-02 15:45:42,686 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 15:45:42,686 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:45:42,687 INFO L256 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-12-02 15:45:42,688 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:45:42,896 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-12-02 15:45:42,896 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:45:43,159 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-12-02 15:45:43,159 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-12-02 15:45:43,174 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-12-02 15:45:43,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908362283] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 15:45:43,174 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 15:45:43,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 25 [2024-12-02 15:45:43,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658095315] [2024-12-02 15:45:43,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 15:45:43,174 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-12-02 15:45:43,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:45:43,175 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-12-02 15:45:43,175 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2024-12-02 15:45:44,462 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-12-02 15:45:44,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 836 transitions, 20235 flow. Second operand has 25 states, 25 states have (on average 18.44) internal successors, (461), 25 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:45:44,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 15:45:44,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-12-02 15:45:44,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 15:45:51,664 INFO L124 PetriNetUnfolderBase]: 10658/18577 cut-off events. [2024-12-02 15:45:51,664 INFO L125 PetriNetUnfolderBase]: For 554157/554403 co-relation queries the response was YES. [2024-12-02 15:45:51,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161572 conditions, 18577 events. 10658/18577 cut-off events. For 554157/554403 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 134730 event pairs, 973 based on Foata normal form. 60/18637 useless extension candidates. Maximal degree in co-relation 161359. Up to 5916 conditions per place. [2024-12-02 15:45:51,900 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 365 selfloop transitions, 690 changer transitions 0/1057 dead transitions. [2024-12-02 15:45:51,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 1057 transitions, 25832 flow [2024-12-02 15:45:51,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-12-02 15:45:51,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-12-02 15:45:51,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 548 transitions. [2024-12-02 15:45:51,901 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5219047619047619 [2024-12-02 15:45:51,902 INFO L175 Difference]: Start difference. First operand has 415 places, 836 transitions, 20235 flow. Second operand 25 states and 548 transitions. [2024-12-02 15:45:51,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 1057 transitions, 25832 flow [2024-12-02 15:45:56,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 1057 transitions, 23985 flow, removed 679 selfloop flow, removed 19 redundant places. [2024-12-02 15:45:56,927 INFO L231 Difference]: Finished difference. Result has 426 places, 885 transitions, 21373 flow [2024-12-02 15:45:56,928 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=18703, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=836, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=643, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=21373, PETRI_PLACES=426, PETRI_TRANSITIONS=885} [2024-12-02 15:45:56,928 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 384 predicate places. [2024-12-02 15:45:56,928 INFO L471 AbstractCegarLoop]: Abstraction has has 426 places, 885 transitions, 21373 flow [2024-12-02 15:45:56,928 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 18.44) internal successors, (461), 25 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:45:56,928 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 15:45:56,928 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:45:56,934 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-12-02 15:45:57,128 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2024-12-02 15:45:57,129 INFO L396 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-12-02 15:45:57,129 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:45:57,129 INFO L85 PathProgramCache]: Analyzing trace with hash -2020877578, now seen corresponding path program 35 times [2024-12-02 15:45:57,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:45:57,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002305208] [2024-12-02 15:45:57,129 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 15:45:57,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:45:57,166 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-12-02 15:45:57,166 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:45:57,967 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-12-02 15:45:57,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:45:57,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002305208] [2024-12-02 15:45:57,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002305208] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:45:57,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613332124] [2024-12-02 15:45:57,968 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 15:45:57,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:45:57,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:45:57,969 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:45:57,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-12-02 15:45:58,203 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-12-02 15:45:58,203 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:45:58,205 INFO L256 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-12-02 15:45:58,206 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:45:58,564 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 15:45:58,564 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 51 [2024-12-02 15:45:58,663 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-02 15:45:58,663 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:45:58,961 INFO L349 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2024-12-02 15:45:58,961 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 4 [2024-12-02 15:45:59,011 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-12-02 15:45:59,011 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-12-02 15:45:59,047 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-12-02 15:45:59,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613332124] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 15:45:59,047 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 15:45:59,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 9] total 29 [2024-12-02 15:45:59,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848615371] [2024-12-02 15:45:59,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 15:45:59,048 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-12-02 15:45:59,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:45:59,048 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-12-02 15:45:59,048 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2024-12-02 15:46:00,198 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-12-02 15:46:00,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 885 transitions, 21373 flow. Second operand has 29 states, 29 states have (on average 18.517241379310345) internal successors, (537), 29 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:46:00,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 15:46:00,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-12-02 15:46:00,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 15:46:07,292 INFO L124 PetriNetUnfolderBase]: 10734/18724 cut-off events. [2024-12-02 15:46:07,292 INFO L125 PetriNetUnfolderBase]: For 475848/476145 co-relation queries the response was YES. [2024-12-02 15:46:07,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159010 conditions, 18724 events. 10734/18724 cut-off events. For 475848/476145 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 136789 event pairs, 2949 based on Foata normal form. 36/18760 useless extension candidates. Maximal degree in co-relation 158803. Up to 6138 conditions per place. [2024-12-02 15:46:07,519 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 639 selfloop transitions, 381 changer transitions 1/1023 dead transitions. [2024-12-02 15:46:07,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 1023 transitions, 25488 flow [2024-12-02 15:46:07,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-12-02 15:46:07,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-12-02 15:46:07,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 400 transitions. [2024-12-02 15:46:07,520 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5602240896358543 [2024-12-02 15:46:07,520 INFO L175 Difference]: Start difference. First operand has 426 places, 885 transitions, 21373 flow. Second operand 17 states and 400 transitions. [2024-12-02 15:46:07,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 1023 transitions, 25488 flow [2024-12-02 15:46:10,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 1023 transitions, 24261 flow, removed 185 selfloop flow, removed 10 redundant places. [2024-12-02 15:46:10,810 INFO L231 Difference]: Finished difference. Result has 436 places, 890 transitions, 21378 flow [2024-12-02 15:46:10,810 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=20258, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=885, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=377, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=21378, PETRI_PLACES=436, PETRI_TRANSITIONS=890} [2024-12-02 15:46:10,811 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 394 predicate places. [2024-12-02 15:46:10,811 INFO L471 AbstractCegarLoop]: Abstraction has has 436 places, 890 transitions, 21378 flow [2024-12-02 15:46:10,811 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 18.517241379310345) internal successors, (537), 29 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:46:10,811 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 15:46:10,811 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:46:10,817 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2024-12-02 15:46:11,011 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2024-12-02 15:46:11,012 INFO L396 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-12-02 15:46:11,012 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:46:11,012 INFO L85 PathProgramCache]: Analyzing trace with hash -2110347549, now seen corresponding path program 36 times [2024-12-02 15:46:11,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:46:11,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265094353] [2024-12-02 15:46:11,012 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 15:46:11,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:46:11,030 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-12-02 15:46:11,030 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:46:11,563 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-02 15:46:11,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:46:11,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265094353] [2024-12-02 15:46:11,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265094353] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:46:11,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244061580] [2024-12-02 15:46:11,563 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 15:46:11,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:46:11,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:46:11,565 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:46:11,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-12-02 15:46:11,717 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-12-02 15:46:11,717 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:46:11,718 INFO L256 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-12-02 15:46:11,719 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:46:12,027 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-12-02 15:46:12,027 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2024-12-02 15:46:12,060 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-12-02 15:46:12,060 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:46:12,423 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-12-02 15:46:12,423 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-12-02 15:46:12,525 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-12-02 15:46:12,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244061580] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 15:46:12,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 15:46:12,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 28 [2024-12-02 15:46:12,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258587459] [2024-12-02 15:46:12,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 15:46:12,526 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-12-02 15:46:12,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:46:12,527 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-12-02 15:46:12,527 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2024-12-02 15:46:14,129 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-12-02 15:46:14,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 890 transitions, 21378 flow. Second operand has 28 states, 28 states have (on average 18.285714285714285) internal successors, (512), 28 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:46:14,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 15:46:14,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-12-02 15:46:14,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 15:46:23,418 INFO L124 PetriNetUnfolderBase]: 11348/19809 cut-off events. [2024-12-02 15:46:23,418 INFO L125 PetriNetUnfolderBase]: For 499583/499829 co-relation queries the response was YES. [2024-12-02 15:46:23,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165854 conditions, 19809 events. 11348/19809 cut-off events. For 499583/499829 co-relation queries the response was YES. Maximal size of possible extension queue 580. Compared 145217 event pairs, 2098 based on Foata normal form. 80/19889 useless extension candidates. Maximal degree in co-relation 165645. Up to 6640 conditions per place. [2024-12-02 15:46:23,675 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 359 selfloop transitions, 712 changer transitions 0/1073 dead transitions. [2024-12-02 15:46:23,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 1073 transitions, 26161 flow [2024-12-02 15:46:23,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-12-02 15:46:23,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-12-02 15:46:23,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 573 transitions. [2024-12-02 15:46:23,676 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5457142857142857 [2024-12-02 15:46:23,676 INFO L175 Difference]: Start difference. First operand has 436 places, 890 transitions, 21378 flow. Second operand 25 states and 573 transitions. [2024-12-02 15:46:23,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 1073 transitions, 26161 flow [2024-12-02 15:46:27,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 1073 transitions, 25650 flow, removed 42 selfloop flow, removed 10 redundant places. [2024-12-02 15:46:27,042 INFO L231 Difference]: Finished difference. Result has 458 places, 927 transitions, 23766 flow [2024-12-02 15:46:27,042 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=20925, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=890, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=679, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=23766, PETRI_PLACES=458, PETRI_TRANSITIONS=927} [2024-12-02 15:46:27,043 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 416 predicate places. [2024-12-02 15:46:27,043 INFO L471 AbstractCegarLoop]: Abstraction has has 458 places, 927 transitions, 23766 flow [2024-12-02 15:46:27,043 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 18.285714285714285) internal successors, (512), 28 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:46:27,043 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 15:46:27,043 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:46:27,049 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2024-12-02 15:46:27,243 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:46:27,243 INFO L396 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-12-02 15:46:27,244 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:46:27,244 INFO L85 PathProgramCache]: Analyzing trace with hash -869212505, now seen corresponding path program 37 times [2024-12-02 15:46:27,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:46:27,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959177703] [2024-12-02 15:46:27,244 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 15:46:27,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:46:27,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:46:27,884 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-02 15:46:27,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:46:27,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959177703] [2024-12-02 15:46:27,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959177703] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:46:27,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397672673] [2024-12-02 15:46:27,884 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 15:46:27,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:46:27,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:46:27,886 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:46:27,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-12-02 15:46:28,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:46:28,058 INFO L256 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-12-02 15:46:28,059 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:46:28,239 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-12-02 15:46:28,239 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 19 [2024-12-02 15:46:28,248 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-12-02 15:46:28,249 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2024-12-02 15:46:28,306 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-12-02 15:46:28,306 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:46:28,589 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-12-02 15:46:28,589 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-12-02 15:46:28,602 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-12-02 15:46:28,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397672673] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 15:46:28,603 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 15:46:28,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 26 [2024-12-02 15:46:28,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28010670] [2024-12-02 15:46:28,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 15:46:28,603 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-12-02 15:46:28,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:46:28,603 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-12-02 15:46:28,604 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2024-12-02 15:46:29,772 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-12-02 15:46:29,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 927 transitions, 23766 flow. Second operand has 26 states, 26 states have (on average 18.26923076923077) internal successors, (475), 26 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:46:29,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 15:46:29,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-12-02 15:46:29,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 15:46:39,353 INFO L124 PetriNetUnfolderBase]: 12122/21204 cut-off events. [2024-12-02 15:46:39,353 INFO L125 PetriNetUnfolderBase]: For 578248/578494 co-relation queries the response was YES. [2024-12-02 15:46:39,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180242 conditions, 21204 events. 12122/21204 cut-off events. For 578248/578494 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 157880 event pairs, 2261 based on Foata normal form. 36/21240 useless extension candidates. Maximal degree in co-relation 180032. Up to 7365 conditions per place. [2024-12-02 15:46:39,672 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 352 selfloop transitions, 750 changer transitions 3/1107 dead transitions. [2024-12-02 15:46:39,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 1107 transitions, 28827 flow [2024-12-02 15:46:39,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-12-02 15:46:39,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-12-02 15:46:39,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 556 transitions. [2024-12-02 15:46:39,673 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5515873015873016 [2024-12-02 15:46:39,673 INFO L175 Difference]: Start difference. First operand has 458 places, 927 transitions, 23766 flow. Second operand 24 states and 556 transitions. [2024-12-02 15:46:39,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 1107 transitions, 28827 flow [2024-12-02 15:46:44,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 1107 transitions, 28377 flow, removed 21 selfloop flow, removed 12 redundant places. [2024-12-02 15:46:44,392 INFO L231 Difference]: Finished difference. Result has 477 places, 979 transitions, 26823 flow [2024-12-02 15:46:44,392 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=23324, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=927, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=701, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=26823, PETRI_PLACES=477, PETRI_TRANSITIONS=979} [2024-12-02 15:46:44,392 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 435 predicate places. [2024-12-02 15:46:44,392 INFO L471 AbstractCegarLoop]: Abstraction has has 477 places, 979 transitions, 26823 flow [2024-12-02 15:46:44,393 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 18.26923076923077) internal successors, (475), 26 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:46:44,393 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 15:46:44,393 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:46:44,399 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2024-12-02 15:46:44,593 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2024-12-02 15:46:44,593 INFO L396 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-12-02 15:46:44,594 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:46:44,594 INFO L85 PathProgramCache]: Analyzing trace with hash 960831029, now seen corresponding path program 38 times [2024-12-02 15:46:44,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:46:44,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459369797] [2024-12-02 15:46:44,594 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 15:46:44,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:46:44,616 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 15:46:44,617 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:46:45,120 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-02 15:46:45,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:46:45,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459369797] [2024-12-02 15:46:45,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459369797] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:46:45,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840485391] [2024-12-02 15:46:45,120 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 15:46:45,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:46:45,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:46:45,122 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:46:45,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-12-02 15:46:45,284 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 15:46:45,284 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:46:45,285 INFO L256 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-12-02 15:46:45,286 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:46:45,556 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-12-02 15:46:45,556 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:46:45,909 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-12-02 15:46:45,910 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-12-02 15:46:46,008 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-12-02 15:46:46,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840485391] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 15:46:46,008 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 15:46:46,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 28 [2024-12-02 15:46:46,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112445582] [2024-12-02 15:46:46,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 15:46:46,008 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-12-02 15:46:46,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:46:46,009 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-12-02 15:46:46,009 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2024-12-02 15:46:47,284 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-12-02 15:46:47,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 979 transitions, 26823 flow. Second operand has 28 states, 28 states have (on average 18.357142857142858) internal successors, (514), 28 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:46:47,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 15:46:47,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-12-02 15:46:47,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 15:46:56,632 INFO L124 PetriNetUnfolderBase]: 12853/22460 cut-off events. [2024-12-02 15:46:56,632 INFO L125 PetriNetUnfolderBase]: For 731299/731545 co-relation queries the response was YES. [2024-12-02 15:46:56,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199929 conditions, 22460 events. 12853/22460 cut-off events. For 731299/731545 co-relation queries the response was YES. Maximal size of possible extension queue 618. Compared 168464 event pairs, 3122 based on Foata normal form. 48/22508 useless extension candidates. Maximal degree in co-relation 199711. Up to 11249 conditions per place. [2024-12-02 15:46:56,954 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 514 selfloop transitions, 632 changer transitions 0/1148 dead transitions. [2024-12-02 15:46:56,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 1148 transitions, 31930 flow [2024-12-02 15:46:56,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-12-02 15:46:56,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-12-02 15:46:56,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 481 transitions. [2024-12-02 15:46:56,956 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5205627705627706 [2024-12-02 15:46:56,956 INFO L175 Difference]: Start difference. First operand has 477 places, 979 transitions, 26823 flow. Second operand 22 states and 481 transitions. [2024-12-02 15:46:56,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 1148 transitions, 31930 flow [2024-12-02 15:47:02,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 1148 transitions, 31396 flow, removed 49 selfloop flow, removed 12 redundant places. [2024-12-02 15:47:02,409 INFO L231 Difference]: Finished difference. Result has 492 places, 1014 transitions, 29024 flow [2024-12-02 15:47:02,410 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=26291, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=979, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=597, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=29024, PETRI_PLACES=492, PETRI_TRANSITIONS=1014} [2024-12-02 15:47:02,410 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 450 predicate places. [2024-12-02 15:47:02,410 INFO L471 AbstractCegarLoop]: Abstraction has has 492 places, 1014 transitions, 29024 flow [2024-12-02 15:47:02,410 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 18.357142857142858) internal successors, (514), 28 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:47:02,410 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 15:47:02,410 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:47:02,418 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2024-12-02 15:47:02,611 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2024-12-02 15:47:02,611 INFO L396 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-12-02 15:47:02,611 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:47:02,612 INFO L85 PathProgramCache]: Analyzing trace with hash 391613828, now seen corresponding path program 39 times [2024-12-02 15:47:02,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:47:02,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015553618] [2024-12-02 15:47:02,612 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 15:47:02,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:47:02,645 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-12-02 15:47:02,645 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:47:03,367 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-02 15:47:03,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:47:03,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015553618] [2024-12-02 15:47:03,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015553618] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:47:03,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980168218] [2024-12-02 15:47:03,368 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 15:47:03,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:47:03,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:47:03,369 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:47:03,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3eeed5d-7517-4480-90cb-eaa5aae65870/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-12-02 15:47:03,543 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-12-02 15:47:03,543 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:47:03,544 INFO L256 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-12-02 15:47:03,546 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:47:03,849 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-12-02 15:47:03,849 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:47:04,289 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-12-02 15:47:04,289 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-12-02 15:47:04,346 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-12-02 15:47:04,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980168218] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 15:47:04,346 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 15:47:04,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 28 [2024-12-02 15:47:04,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955342414] [2024-12-02 15:47:04,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 15:47:04,346 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-12-02 15:47:04,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:47:04,347 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-12-02 15:47:04,347 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756