./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-array-sum2.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_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/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_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-array-sum2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/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_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/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 6d47c8696b49948f6f8f53dd9eda6f4e0281717fd9a29e264a19ded5493fa577 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-12-02 07:18:05,014 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-12-02 07:18:05,069 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-12-02 07:18:05,073 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-12-02 07:18:05,074 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-12-02 07:18:05,095 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-12-02 07:18:05,096 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-12-02 07:18:05,096 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-12-02 07:18:05,096 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-12-02 07:18:05,097 INFO L153 SettingsManager]: * Use memory slicer=true [2024-12-02 07:18:05,097 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-12-02 07:18:05,097 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-12-02 07:18:05,097 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-12-02 07:18:05,097 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-12-02 07:18:05,097 INFO L153 SettingsManager]: * Use SBE=true [2024-12-02 07:18:05,097 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-12-02 07:18:05,098 INFO L153 SettingsManager]: * sizeof long=4 [2024-12-02 07:18:05,098 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-12-02 07:18:05,098 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-12-02 07:18:05,098 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-12-02 07:18:05,098 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-12-02 07:18:05,098 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-12-02 07:18:05,098 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-12-02 07:18:05,098 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-12-02 07:18:05,098 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-12-02 07:18:05,098 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-12-02 07:18:05,098 INFO L153 SettingsManager]: * sizeof long double=12 [2024-12-02 07:18:05,099 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-12-02 07:18:05,099 INFO L153 SettingsManager]: * Use constant arrays=true [2024-12-02 07:18:05,099 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-12-02 07:18:05,099 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 07:18:05,099 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 07:18:05,099 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 07:18:05,099 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 07:18:05,099 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-12-02 07:18:05,099 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 07:18:05,099 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 07:18:05,100 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 07:18:05,100 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 07:18:05,100 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-12-02 07:18:05,100 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-12-02 07:18:05,100 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-12-02 07:18:05,100 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-12-02 07:18:05,100 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-12-02 07:18:05,100 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-12-02 07:18:05,100 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-12-02 07:18:05,100 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-12-02 07:18:05,100 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_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/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 -> 6d47c8696b49948f6f8f53dd9eda6f4e0281717fd9a29e264a19ded5493fa577 [2024-12-02 07:18:05,333 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-12-02 07:18:05,342 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-12-02 07:18:05,344 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-12-02 07:18:05,345 INFO L270 PluginConnector]: Initializing CDTParser... [2024-12-02 07:18:05,345 INFO L274 PluginConnector]: CDTParser initialized [2024-12-02 07:18:05,347 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/../../sv-benchmarks/c/weaver/popl20-more-array-sum2.wvr.c [2024-12-02 07:18:08,026 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/data/43e3967fe/a593879c1253459488eae320cd4188f2/FLAG43bd4a386 [2024-12-02 07:18:08,201 INFO L384 CDTParser]: Found 1 translation units. [2024-12-02 07:18:08,201 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/sv-benchmarks/c/weaver/popl20-more-array-sum2.wvr.c [2024-12-02 07:18:08,208 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/data/43e3967fe/a593879c1253459488eae320cd4188f2/FLAG43bd4a386 [2024-12-02 07:18:08,222 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/data/43e3967fe/a593879c1253459488eae320cd4188f2 [2024-12-02 07:18:08,224 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-12-02 07:18:08,225 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-12-02 07:18:08,226 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-12-02 07:18:08,226 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-12-02 07:18:08,229 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-12-02 07:18:08,230 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:18:08" (1/1) ... [2024-12-02 07:18:08,230 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6aee7969 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:18:08, skipping insertion in model container [2024-12-02 07:18:08,230 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:18:08" (1/1) ... [2024-12-02 07:18:08,243 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-12-02 07:18:08,394 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 07:18:08,397 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 07:18:08,404 INFO L200 MainTranslator]: Completed pre-run [2024-12-02 07:18:08,427 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 07:18:08,438 INFO L204 MainTranslator]: Completed translation [2024-12-02 07:18:08,438 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:18:08 WrapperNode [2024-12-02 07:18:08,438 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-12-02 07:18:08,439 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-12-02 07:18:08,439 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-12-02 07:18:08,439 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-12-02 07:18:08,444 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:18:08" (1/1) ... [2024-12-02 07:18:08,450 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:18:08" (1/1) ... [2024-12-02 07:18:08,473 INFO L138 Inliner]: procedures = 24, calls = 38, calls flagged for inlining = 17, calls inlined = 29, statements flattened = 261 [2024-12-02 07:18:08,474 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-12-02 07:18:08,474 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-12-02 07:18:08,474 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-12-02 07:18:08,474 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-12-02 07:18:08,483 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:18:08" (1/1) ... [2024-12-02 07:18:08,483 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:18:08" (1/1) ... [2024-12-02 07:18:08,486 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:18:08" (1/1) ... [2024-12-02 07:18:08,501 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 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 07:18:08,501 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:18:08" (1/1) ... [2024-12-02 07:18:08,501 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:18:08" (1/1) ... [2024-12-02 07:18:08,510 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:18:08" (1/1) ... [2024-12-02 07:18:08,511 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:18:08" (1/1) ... [2024-12-02 07:18:08,515 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:18:08" (1/1) ... [2024-12-02 07:18:08,516 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:18:08" (1/1) ... [2024-12-02 07:18:08,518 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:18:08" (1/1) ... [2024-12-02 07:18:08,520 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-12-02 07:18:08,521 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-12-02 07:18:08,521 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-12-02 07:18:08,521 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-12-02 07:18:08,522 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:18:08" (1/1) ... [2024-12-02 07:18:08,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 07:18:08,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:18:08,548 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-12-02 07:18:08,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-12-02 07:18:08,574 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-12-02 07:18:08,575 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-12-02 07:18:08,575 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-12-02 07:18:08,575 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-12-02 07:18:08,575 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-12-02 07:18:08,575 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-12-02 07:18:08,575 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-12-02 07:18:08,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-12-02 07:18:08,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-12-02 07:18:08,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-12-02 07:18:08,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-12-02 07:18:08,575 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-12-02 07:18:08,575 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-12-02 07:18:08,576 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-12-02 07:18:08,576 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-12-02 07:18:08,576 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-12-02 07:18:08,576 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-12-02 07:18:08,576 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-12-02 07:18:08,577 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 07:18:08,675 INFO L234 CfgBuilder]: Building ICFG [2024-12-02 07:18:08,677 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-12-02 07:18:09,080 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-12-02 07:18:09,080 INFO L283 CfgBuilder]: Performing block encoding [2024-12-02 07:18:09,474 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-12-02 07:18:09,474 INFO L312 CfgBuilder]: Removed 5 assume(true) statements. [2024-12-02 07:18:09,474 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:18:09 BoogieIcfgContainer [2024-12-02 07:18:09,474 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-12-02 07:18:09,476 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-12-02 07:18:09,476 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-12-02 07:18:09,480 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-12-02 07:18:09,481 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 07:18:08" (1/3) ... [2024-12-02 07:18:09,481 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5409aa1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:18:09, skipping insertion in model container [2024-12-02 07:18:09,481 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:18:08" (2/3) ... [2024-12-02 07:18:09,481 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5409aa1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:18:09, skipping insertion in model container [2024-12-02 07:18:09,482 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:18:09" (3/3) ... [2024-12-02 07:18:09,483 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum2.wvr.c [2024-12-02 07:18:09,498 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-12-02 07:18:09,499 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-more-array-sum2.wvr.c that has 4 procedures, 51 locations, 1 initial locations, 5 loop locations, and 18 error locations. [2024-12-02 07:18:09,499 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-12-02 07:18:09,576 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-12-02 07:18:09,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 60 places, 55 transitions, 131 flow [2024-12-02 07:18:09,638 INFO L124 PetriNetUnfolderBase]: 5/52 cut-off events. [2024-12-02 07:18:09,641 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-12-02 07:18:09,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65 conditions, 52 events. 5/52 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 113 event pairs, 0 based on Foata normal form. 0/29 useless extension candidates. Maximal degree in co-relation 37. Up to 2 conditions per place. [2024-12-02 07:18:09,644 INFO L82 GeneralOperation]: Start removeDead. Operand has 60 places, 55 transitions, 131 flow [2024-12-02 07:18:09,647 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 51 transitions, 120 flow [2024-12-02 07:18:09,654 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-12-02 07:18:09,666 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;@15bead5b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-12-02 07:18:09,666 INFO L334 AbstractCegarLoop]: Starting to check reachability of 33 error locations. [2024-12-02 07:18:09,669 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-12-02 07:18:09,669 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-12-02 07:18:09,669 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-12-02 07:18:09,669 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:18:09,670 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-12-02 07:18:09,670 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-12-02 07:18:09,675 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:18:09,675 INFO L85 PathProgramCache]: Analyzing trace with hash 910290, now seen corresponding path program 1 times [2024-12-02 07:18:09,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:18:09,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578117981] [2024-12-02 07:18:09,683 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:18:09,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:18:09,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:18:09,874 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 07:18:09,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:18:09,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578117981] [2024-12-02 07:18:09,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578117981] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:18:09,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:18:09,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-12-02 07:18:09,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085811919] [2024-12-02 07:18:09,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:18:09,884 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 07:18:09,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:18:09,909 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 07:18:09,909 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 07:18:09,925 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 55 [2024-12-02 07:18:09,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 51 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 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 07:18:09,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:18:09,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 55 [2024-12-02 07:18:09,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:18:10,493 INFO L124 PetriNetUnfolderBase]: 2971/4367 cut-off events. [2024-12-02 07:18:10,494 INFO L125 PetriNetUnfolderBase]: For 248/248 co-relation queries the response was YES. [2024-12-02 07:18:10,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8809 conditions, 4367 events. 2971/4367 cut-off events. For 248/248 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 26147 event pairs, 2534 based on Foata normal form. 1/2617 useless extension candidates. Maximal degree in co-relation 8290. Up to 4213 conditions per place. [2024-12-02 07:18:10,519 INFO L140 encePairwiseOnDemand]: 50/55 looper letters, 39 selfloop transitions, 2 changer transitions 0/47 dead transitions. [2024-12-02 07:18:10,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 47 transitions, 194 flow [2024-12-02 07:18:10,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 07:18:10,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 07:18:10,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 74 transitions. [2024-12-02 07:18:10,530 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4484848484848485 [2024-12-02 07:18:10,532 INFO L175 Difference]: Start difference. First operand has 56 places, 51 transitions, 120 flow. Second operand 3 states and 74 transitions. [2024-12-02 07:18:10,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 47 transitions, 194 flow [2024-12-02 07:18:10,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 47 transitions, 182 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-12-02 07:18:10,540 INFO L231 Difference]: Finished difference. Result has 48 places, 47 transitions, 104 flow [2024-12-02 07:18:10,542 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=48, PETRI_TRANSITIONS=47} [2024-12-02 07:18:10,544 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, -8 predicate places. [2024-12-02 07:18:10,545 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 47 transitions, 104 flow [2024-12-02 07:18:10,545 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 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 07:18:10,545 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:18:10,545 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-12-02 07:18:10,545 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-12-02 07:18:10,545 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-12-02 07:18:10,546 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:18:10,546 INFO L85 PathProgramCache]: Analyzing trace with hash 910291, now seen corresponding path program 1 times [2024-12-02 07:18:10,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:18:10,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227377957] [2024-12-02 07:18:10,546 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:18:10,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:18:10,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:18:10,807 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 07:18:10,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:18:10,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227377957] [2024-12-02 07:18:10,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227377957] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:18:10,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:18:10,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 07:18:10,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954595045] [2024-12-02 07:18:10,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:18:10,809 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 07:18:10,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:18:10,810 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 07:18:10,810 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 07:18:10,822 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 55 [2024-12-02 07:18:10,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 47 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 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 07:18:10,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:18:10,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 55 [2024-12-02 07:18:10,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:18:11,307 INFO L124 PetriNetUnfolderBase]: 2971/4366 cut-off events. [2024-12-02 07:18:11,308 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2024-12-02 07:18:11,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8663 conditions, 4366 events. 2971/4366 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 26177 event pairs, 2534 based on Foata normal form. 0/2615 useless extension candidates. Maximal degree in co-relation 8642. Up to 4217 conditions per place. [2024-12-02 07:18:11,324 INFO L140 encePairwiseOnDemand]: 50/55 looper letters, 38 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2024-12-02 07:18:11,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 46 transitions, 186 flow [2024-12-02 07:18:11,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 07:18:11,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 07:18:11,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 83 transitions. [2024-12-02 07:18:11,326 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.37727272727272726 [2024-12-02 07:18:11,326 INFO L175 Difference]: Start difference. First operand has 48 places, 47 transitions, 104 flow. Second operand 4 states and 83 transitions. [2024-12-02 07:18:11,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 46 transitions, 186 flow [2024-12-02 07:18:11,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 46 transitions, 182 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-12-02 07:18:11,329 INFO L231 Difference]: Finished difference. Result has 48 places, 46 transitions, 106 flow [2024-12-02 07:18:11,329 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=106, PETRI_PLACES=48, PETRI_TRANSITIONS=46} [2024-12-02 07:18:11,330 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, -8 predicate places. [2024-12-02 07:18:11,330 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 46 transitions, 106 flow [2024-12-02 07:18:11,330 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 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 07:18:11,330 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:18:11,330 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-12-02 07:18:11,330 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-12-02 07:18:11,330 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-12-02 07:18:11,331 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:18:11,331 INFO L85 PathProgramCache]: Analyzing trace with hash 28221618, now seen corresponding path program 1 times [2024-12-02 07:18:11,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:18:11,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000508803] [2024-12-02 07:18:11,331 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:18:11,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:18:11,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:18:11,439 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 07:18:11,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:18:11,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000508803] [2024-12-02 07:18:11,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000508803] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:18:11,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:18:11,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 07:18:11,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689291620] [2024-12-02 07:18:11,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:18:11,440 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 07:18:11,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:18:11,441 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 07:18:11,441 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 07:18:11,454 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 55 [2024-12-02 07:18:11,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 46 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:18:11,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:18:11,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 55 [2024-12-02 07:18:11,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:18:11,789 INFO L124 PetriNetUnfolderBase]: 2971/4372 cut-off events. [2024-12-02 07:18:11,789 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2024-12-02 07:18:11,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8678 conditions, 4372 events. 2971/4372 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 26270 event pairs, 2534 based on Foata normal form. 1/2621 useless extension candidates. Maximal degree in co-relation 8654. Up to 4219 conditions per place. [2024-12-02 07:18:11,805 INFO L140 encePairwiseOnDemand]: 49/55 looper letters, 41 selfloop transitions, 4 changer transitions 1/51 dead transitions. [2024-12-02 07:18:11,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 51 transitions, 214 flow [2024-12-02 07:18:11,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 07:18:11,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 07:18:11,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 97 transitions. [2024-12-02 07:18:11,807 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4409090909090909 [2024-12-02 07:18:11,807 INFO L175 Difference]: Start difference. First operand has 48 places, 46 transitions, 106 flow. Second operand 4 states and 97 transitions. [2024-12-02 07:18:11,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 51 transitions, 214 flow [2024-12-02 07:18:11,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 51 transitions, 200 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-12-02 07:18:11,810 INFO L231 Difference]: Finished difference. Result has 50 places, 48 transitions, 124 flow [2024-12-02 07:18:11,810 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=124, PETRI_PLACES=50, PETRI_TRANSITIONS=48} [2024-12-02 07:18:11,811 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, -6 predicate places. [2024-12-02 07:18:11,811 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 48 transitions, 124 flow [2024-12-02 07:18:11,811 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:18:11,811 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:18:11,811 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-12-02 07:18:11,811 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-12-02 07:18:11,811 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-12-02 07:18:11,812 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:18:11,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1349578676, now seen corresponding path program 1 times [2024-12-02 07:18:11,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:18:11,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335368882] [2024-12-02 07:18:11,812 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:18:11,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:18:11,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:18:12,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:18:12,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:18:12,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335368882] [2024-12-02 07:18:12,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335368882] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:18:12,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640985321] [2024-12-02 07:18:12,049 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:18:12,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:18:12,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:18:12,051 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:18:12,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-12-02 07:18:12,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:18:12,122 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-12-02 07:18:12,125 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:18:12,166 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 07:18:12,291 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-12-02 07:18:12,291 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 32 treesize of output 27 [2024-12-02 07:18:12,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:18:12,323 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:18:12,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:18:12,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640985321] provided 1 perfect and 1 imperfect interpolant sequences [2024-12-02 07:18:12,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-12-02 07:18:12,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 3] total 10 [2024-12-02 07:18:12,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650847177] [2024-12-02 07:18:12,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:18:12,404 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 07:18:12,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:18:12,404 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 07:18:12,405 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-12-02 07:18:12,432 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 55 [2024-12-02 07:18:12,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 48 transitions, 124 flow. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 07:18:12,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:18:12,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 55 [2024-12-02 07:18:12,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:18:12,805 INFO L124 PetriNetUnfolderBase]: 2971/4370 cut-off events. [2024-12-02 07:18:12,805 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2024-12-02 07:18:12,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8683 conditions, 4370 events. 2971/4370 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 26211 event pairs, 2534 based on Foata normal form. 1/2622 useless extension candidates. Maximal degree in co-relation 8654. Up to 4219 conditions per place. [2024-12-02 07:18:12,824 INFO L140 encePairwiseOnDemand]: 50/55 looper letters, 42 selfloop transitions, 4 changer transitions 0/50 dead transitions. [2024-12-02 07:18:12,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 50 transitions, 222 flow [2024-12-02 07:18:12,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 07:18:12,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-02 07:18:12,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 97 transitions. [2024-12-02 07:18:12,826 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3527272727272727 [2024-12-02 07:18:12,826 INFO L175 Difference]: Start difference. First operand has 50 places, 48 transitions, 124 flow. Second operand 5 states and 97 transitions. [2024-12-02 07:18:12,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 50 transitions, 222 flow [2024-12-02 07:18:12,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 50 transitions, 212 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-12-02 07:18:12,828 INFO L231 Difference]: Finished difference. Result has 52 places, 48 transitions, 128 flow [2024-12-02 07:18:12,828 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=128, PETRI_PLACES=52, PETRI_TRANSITIONS=48} [2024-12-02 07:18:12,829 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, -4 predicate places. [2024-12-02 07:18:12,829 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 48 transitions, 128 flow [2024-12-02 07:18:12,829 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 07:18:12,829 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:18:12,829 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-12-02 07:18:12,835 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-12-02 07:18:13,030 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:18:13,030 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-12-02 07:18:13,030 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:18:13,030 INFO L85 PathProgramCache]: Analyzing trace with hash -134986034, now seen corresponding path program 1 times [2024-12-02 07:18:13,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:18:13,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17366708] [2024-12-02 07:18:13,031 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:18:13,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:18:13,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:18:13,174 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 07:18:13,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:18:13,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17366708] [2024-12-02 07:18:13,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17366708] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:18:13,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366382531] [2024-12-02 07:18:13,175 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:18:13,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:18:13,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:18:13,177 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:18:13,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-12-02 07:18:13,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:18:13,249 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-12-02 07:18:13,250 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:18:13,323 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 07:18:13,323 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:18:13,386 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 07:18:13,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366382531] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:18:13,386 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:18:13,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-12-02 07:18:13,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103412685] [2024-12-02 07:18:13,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:18:13,387 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-12-02 07:18:13,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:18:13,388 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-12-02 07:18:13,388 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-12-02 07:18:13,464 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 55 [2024-12-02 07:18:13,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 48 transitions, 128 flow. Second operand has 13 states, 13 states have (on average 13.538461538461538) internal successors, (176), 13 states have internal predecessors, (176), 0 states have call successors, (0), 0 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 07:18:13,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:18:13,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 55 [2024-12-02 07:18:13,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:18:14,416 INFO L124 PetriNetUnfolderBase]: 5941/8738 cut-off events. [2024-12-02 07:18:14,417 INFO L125 PetriNetUnfolderBase]: For 116/116 co-relation queries the response was YES. [2024-12-02 07:18:14,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17354 conditions, 8738 events. 5941/8738 cut-off events. For 116/116 co-relation queries the response was YES. Maximal size of possible extension queue 643. Compared 55422 event pairs, 5068 based on Foata normal form. 1/5250 useless extension candidates. Maximal degree in co-relation 8662. Up to 4217 conditions per place. [2024-12-02 07:18:14,454 INFO L140 encePairwiseOnDemand]: 48/55 looper letters, 74 selfloop transitions, 14 changer transitions 0/93 dead transitions. [2024-12-02 07:18:14,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 93 transitions, 418 flow [2024-12-02 07:18:14,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-12-02 07:18:14,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-12-02 07:18:14,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-12-02 07:18:14,456 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42045454545454547 [2024-12-02 07:18:14,456 INFO L175 Difference]: Start difference. First operand has 52 places, 48 transitions, 128 flow. Second operand 8 states and 185 transitions. [2024-12-02 07:18:14,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 93 transitions, 418 flow [2024-12-02 07:18:14,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 93 transitions, 411 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-12-02 07:18:14,458 INFO L231 Difference]: Finished difference. Result has 59 places, 56 transitions, 201 flow [2024-12-02 07:18:14,458 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=201, PETRI_PLACES=59, PETRI_TRANSITIONS=56} [2024-12-02 07:18:14,459 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 3 predicate places. [2024-12-02 07:18:14,459 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 56 transitions, 201 flow [2024-12-02 07:18:14,459 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 13.538461538461538) internal successors, (176), 13 states have internal predecessors, (176), 0 states have call successors, (0), 0 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 07:18:14,459 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:18:14,459 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1] [2024-12-02 07:18:14,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-12-02 07:18:14,659 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:18:14,660 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-12-02 07:18:14,660 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:18:14,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1863533776, now seen corresponding path program 2 times [2024-12-02 07:18:14,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:18:14,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421957365] [2024-12-02 07:18:14,660 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 07:18:14,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:18:14,688 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 07:18:14,688 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:18:14,896 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-12-02 07:18:14,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:18:14,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421957365] [2024-12-02 07:18:14,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421957365] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:18:14,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873353616] [2024-12-02 07:18:14,896 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 07:18:14,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:18:14,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:18:14,898 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:18:14,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-12-02 07:18:14,988 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 07:18:14,988 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:18:14,989 INFO L256 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-12-02 07:18:14,990 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:18:15,038 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 07:18:15,169 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-12-02 07:18:15,169 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:18:15,313 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-12-02 07:18:15,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873353616] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:18:15,313 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:18:15,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2024-12-02 07:18:15,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381128920] [2024-12-02 07:18:15,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:18:15,314 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-12-02 07:18:15,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:18:15,314 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-12-02 07:18:15,314 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-12-02 07:18:15,437 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 55 [2024-12-02 07:18:15,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 56 transitions, 201 flow. Second operand has 14 states, 14 states have (on average 11.714285714285714) internal successors, (164), 14 states have internal predecessors, (164), 0 states have call successors, (0), 0 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 07:18:15,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:18:15,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 55 [2024-12-02 07:18:15,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:18:16,414 INFO L124 PetriNetUnfolderBase]: 5941/8736 cut-off events. [2024-12-02 07:18:16,414 INFO L125 PetriNetUnfolderBase]: For 120/120 co-relation queries the response was YES. [2024-12-02 07:18:16,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17376 conditions, 8736 events. 5941/8736 cut-off events. For 120/120 co-relation queries the response was YES. Maximal size of possible extension queue 647. Compared 55626 event pairs, 5068 based on Foata normal form. 2/5240 useless extension candidates. Maximal degree in co-relation 8666. Up to 8425 conditions per place. [2024-12-02 07:18:16,447 INFO L140 encePairwiseOnDemand]: 47/55 looper letters, 34 selfloop transitions, 19 changer transitions 0/57 dead transitions. [2024-12-02 07:18:16,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 57 transitions, 313 flow [2024-12-02 07:18:16,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-12-02 07:18:16,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-12-02 07:18:16,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-12-02 07:18:16,449 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3012987012987013 [2024-12-02 07:18:16,449 INFO L175 Difference]: Start difference. First operand has 59 places, 56 transitions, 201 flow. Second operand 7 states and 116 transitions. [2024-12-02 07:18:16,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 57 transitions, 313 flow [2024-12-02 07:18:16,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 57 transitions, 289 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-12-02 07:18:16,451 INFO L231 Difference]: Finished difference. Result has 62 places, 57 transitions, 221 flow [2024-12-02 07:18:16,452 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=221, PETRI_PLACES=62, PETRI_TRANSITIONS=57} [2024-12-02 07:18:16,452 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 6 predicate places. [2024-12-02 07:18:16,452 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 57 transitions, 221 flow [2024-12-02 07:18:16,452 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.714285714285714) internal successors, (164), 14 states have internal predecessors, (164), 0 states have call successors, (0), 0 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 07:18:16,452 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:18:16,453 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:18:16,462 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-12-02 07:18:16,653 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:18:16,653 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-12-02 07:18:16,653 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:18:16,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1276046413, now seen corresponding path program 1 times [2024-12-02 07:18:16,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:18:16,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97557362] [2024-12-02 07:18:16,654 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:18:16,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:18:16,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:18:16,758 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 07:18:16,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:18:16,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97557362] [2024-12-02 07:18:16,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97557362] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:18:16,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:18:16,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 07:18:16,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604179031] [2024-12-02 07:18:16,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:18:16,759 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 07:18:16,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:18:16,759 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 07:18:16,759 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-12-02 07:18:16,776 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 55 [2024-12-02 07:18:16,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 221 flow. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 07:18:16,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:18:16,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 55 [2024-12-02 07:18:16,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:18:17,178 INFO L124 PetriNetUnfolderBase]: 4065/6024 cut-off events. [2024-12-02 07:18:17,178 INFO L125 PetriNetUnfolderBase]: For 89/89 co-relation queries the response was YES. [2024-12-02 07:18:17,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11991 conditions, 6024 events. 4065/6024 cut-off events. For 89/89 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 36131 event pairs, 3384 based on Foata normal form. 0/3973 useless extension candidates. Maximal degree in co-relation 5972. Up to 5777 conditions per place. [2024-12-02 07:18:17,196 INFO L140 encePairwiseOnDemand]: 49/55 looper letters, 44 selfloop transitions, 6 changer transitions 0/54 dead transitions. [2024-12-02 07:18:17,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 54 transitions, 315 flow [2024-12-02 07:18:17,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 07:18:17,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-02 07:18:17,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 91 transitions. [2024-12-02 07:18:17,198 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.33090909090909093 [2024-12-02 07:18:17,198 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 221 flow. Second operand 5 states and 91 transitions. [2024-12-02 07:18:17,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 54 transitions, 315 flow [2024-12-02 07:18:17,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 54 transitions, 303 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-12-02 07:18:17,200 INFO L231 Difference]: Finished difference. Result has 61 places, 54 transitions, 215 flow [2024-12-02 07:18:17,200 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=215, PETRI_PLACES=61, PETRI_TRANSITIONS=54} [2024-12-02 07:18:17,201 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 5 predicate places. [2024-12-02 07:18:17,201 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 54 transitions, 215 flow [2024-12-02 07:18:17,201 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 07:18:17,201 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:18:17,201 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:18:17,201 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-12-02 07:18:17,201 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-12-02 07:18:17,201 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:18:17,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1276046412, now seen corresponding path program 1 times [2024-12-02 07:18:17,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:18:17,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980831752] [2024-12-02 07:18:17,202 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:18:17,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:18:17,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:18:17,377 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 07:18:17,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:18:17,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980831752] [2024-12-02 07:18:17,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980831752] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:18:17,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455755327] [2024-12-02 07:18:17,378 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:18:17,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:18:17,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:18:17,380 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:18:17,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-12-02 07:18:17,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:18:17,453 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-12-02 07:18:17,454 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:18:17,459 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 07:18:17,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-12-02 07:18:17,493 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 16 treesize of output 11 [2024-12-02 07:18:17,499 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-12-02 07:18:17,500 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 07:18:17,536 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 07:18:17,537 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:18:17,636 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 52 treesize of output 48 [2024-12-02 07:18:17,700 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 07:18:17,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455755327] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:18:17,700 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:18:17,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-12-02 07:18:17,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223041878] [2024-12-02 07:18:17,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:18:17,700 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-12-02 07:18:17,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:18:17,701 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-12-02 07:18:17,701 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-12-02 07:18:17,770 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 55 [2024-12-02 07:18:17,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 54 transitions, 215 flow. Second operand has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 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 07:18:17,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:18:17,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 55 [2024-12-02 07:18:17,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:18:18,536 INFO L124 PetriNetUnfolderBase]: 6493/9448 cut-off events. [2024-12-02 07:18:18,537 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-12-02 07:18:18,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18817 conditions, 9448 events. 6493/9448 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 639. Compared 58112 event pairs, 1858 based on Foata normal form. 0/6228 useless extension candidates. Maximal degree in co-relation 9386. Up to 3671 conditions per place. [2024-12-02 07:18:18,556 INFO L140 encePairwiseOnDemand]: 43/55 looper letters, 77 selfloop transitions, 16 changer transitions 0/97 dead transitions. [2024-12-02 07:18:18,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 97 transitions, 491 flow [2024-12-02 07:18:18,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-12-02 07:18:18,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-12-02 07:18:18,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-12-02 07:18:18,557 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35555555555555557 [2024-12-02 07:18:18,557 INFO L175 Difference]: Start difference. First operand has 61 places, 54 transitions, 215 flow. Second operand 9 states and 176 transitions. [2024-12-02 07:18:18,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 97 transitions, 491 flow [2024-12-02 07:18:18,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 97 transitions, 482 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-12-02 07:18:18,560 INFO L231 Difference]: Finished difference. Result has 68 places, 59 transitions, 271 flow [2024-12-02 07:18:18,560 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=271, PETRI_PLACES=68, PETRI_TRANSITIONS=59} [2024-12-02 07:18:18,560 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 12 predicate places. [2024-12-02 07:18:18,560 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 59 transitions, 271 flow [2024-12-02 07:18:18,561 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 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 07:18:18,561 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:18:18,561 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:18:18,567 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-12-02 07:18:18,761 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:18:18,761 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-12-02 07:18:18,762 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:18:18,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1276046411, now seen corresponding path program 1 times [2024-12-02 07:18:18,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:18:18,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502183889] [2024-12-02 07:18:18,762 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:18:18,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:18:18,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:18:18,816 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 07:18:18,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:18:18,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502183889] [2024-12-02 07:18:18,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502183889] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:18:18,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:18:18,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 07:18:18,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87481250] [2024-12-02 07:18:18,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:18:18,817 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 07:18:18,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:18:18,817 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 07:18:18,817 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 07:18:18,829 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 55 [2024-12-02 07:18:18,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 59 transitions, 271 flow. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:18:18,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:18:18,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 55 [2024-12-02 07:18:18,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:18:19,238 INFO L124 PetriNetUnfolderBase]: 4041/5976 cut-off events. [2024-12-02 07:18:19,238 INFO L125 PetriNetUnfolderBase]: For 2638/2638 co-relation queries the response was YES. [2024-12-02 07:18:19,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14443 conditions, 5976 events. 4041/5976 cut-off events. For 2638/2638 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 35148 event pairs, 3200 based on Foata normal form. 0/4632 useless extension candidates. Maximal degree in co-relation 7198. Up to 5677 conditions per place. [2024-12-02 07:18:19,257 INFO L140 encePairwiseOnDemand]: 50/55 looper letters, 47 selfloop transitions, 4 changer transitions 0/55 dead transitions. [2024-12-02 07:18:19,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 55 transitions, 360 flow [2024-12-02 07:18:19,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 07:18:19,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 07:18:19,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 78 transitions. [2024-12-02 07:18:19,258 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35454545454545455 [2024-12-02 07:18:19,258 INFO L175 Difference]: Start difference. First operand has 68 places, 59 transitions, 271 flow. Second operand 4 states and 78 transitions. [2024-12-02 07:18:19,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 55 transitions, 360 flow [2024-12-02 07:18:19,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 55 transitions, 353 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-12-02 07:18:19,261 INFO L231 Difference]: Finished difference. Result has 65 places, 55 transitions, 259 flow [2024-12-02 07:18:19,261 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=259, PETRI_PLACES=65, PETRI_TRANSITIONS=55} [2024-12-02 07:18:19,262 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 9 predicate places. [2024-12-02 07:18:19,262 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 55 transitions, 259 flow [2024-12-02 07:18:19,262 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:18:19,262 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:18:19,262 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:18:19,262 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-12-02 07:18:19,262 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-12-02 07:18:19,263 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:18:19,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1276046410, now seen corresponding path program 1 times [2024-12-02 07:18:19,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:18:19,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974611729] [2024-12-02 07:18:19,263 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:18:19,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:18:19,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:18:19,479 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 07:18:19,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:18:19,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974611729] [2024-12-02 07:18:19,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974611729] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:18:19,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743832273] [2024-12-02 07:18:19,479 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:18:19,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:18:19,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:18:19,481 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:18:19,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-12-02 07:18:19,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:18:19,559 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-12-02 07:18:19,560 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:18:19,630 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 07:18:19,630 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:18:19,671 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 07:18:19,680 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 07:18:19,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743832273] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:18:19,681 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:18:19,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-12-02 07:18:19,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301537013] [2024-12-02 07:18:19,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:18:19,681 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-12-02 07:18:19,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:18:19,682 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-12-02 07:18:19,682 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-12-02 07:18:19,761 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 55 [2024-12-02 07:18:19,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 55 transitions, 259 flow. Second operand has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 11 states have internal predecessors, (151), 0 states have call successors, (0), 0 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 07:18:19,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:18:19,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 55 [2024-12-02 07:18:19,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:18:20,247 INFO L124 PetriNetUnfolderBase]: 3629/5428 cut-off events. [2024-12-02 07:18:20,247 INFO L125 PetriNetUnfolderBase]: For 1267/1267 co-relation queries the response was YES. [2024-12-02 07:18:20,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13126 conditions, 5428 events. 3629/5428 cut-off events. For 1267/1267 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 31877 event pairs, 1760 based on Foata normal form. 0/4358 useless extension candidates. Maximal degree in co-relation 6539. Up to 3341 conditions per place. [2024-12-02 07:18:20,260 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 70 selfloop transitions, 14 changer transitions 0/88 dead transitions. [2024-12-02 07:18:20,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 88 transitions, 495 flow [2024-12-02 07:18:20,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-12-02 07:18:20,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-12-02 07:18:20,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-12-02 07:18:20,262 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41818181818181815 [2024-12-02 07:18:20,262 INFO L175 Difference]: Start difference. First operand has 65 places, 55 transitions, 259 flow. Second operand 7 states and 161 transitions. [2024-12-02 07:18:20,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 88 transitions, 495 flow [2024-12-02 07:18:20,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 88 transitions, 490 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-12-02 07:18:20,264 INFO L231 Difference]: Finished difference. Result has 69 places, 54 transitions, 278 flow [2024-12-02 07:18:20,264 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=278, PETRI_PLACES=69, PETRI_TRANSITIONS=54} [2024-12-02 07:18:20,265 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 13 predicate places. [2024-12-02 07:18:20,265 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 54 transitions, 278 flow [2024-12-02 07:18:20,265 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 11 states have internal predecessors, (151), 0 states have call successors, (0), 0 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 07:18:20,265 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:18:20,265 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:18:20,270 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-12-02 07:18:20,465 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:18:20,465 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-12-02 07:18:20,466 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:18:20,466 INFO L85 PathProgramCache]: Analyzing trace with hash 2060685287, now seen corresponding path program 1 times [2024-12-02 07:18:20,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:18:20,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531633414] [2024-12-02 07:18:20,466 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:18:20,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:18:20,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:18:20,568 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 07:18:20,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:18:20,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531633414] [2024-12-02 07:18:20,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531633414] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:18:20,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506611507] [2024-12-02 07:18:20,569 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:18:20,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:18:20,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:18:20,571 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:18:20,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-12-02 07:18:20,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:18:20,647 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 07:18:20,648 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:18:20,704 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 07:18:20,704 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:18:20,764 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 07:18:20,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506611507] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:18:20,764 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:18:20,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-12-02 07:18:20,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138746561] [2024-12-02 07:18:20,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:18:20,764 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-12-02 07:18:20,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:18:20,765 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-12-02 07:18:20,765 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-12-02 07:18:20,832 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 55 [2024-12-02 07:18:20,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 54 transitions, 278 flow. Second operand has 14 states, 14 states have (on average 13.071428571428571) internal successors, (183), 14 states have internal predecessors, (183), 0 states have call successors, (0), 0 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 07:18:20,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:18:20,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 55 [2024-12-02 07:18:20,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:18:21,303 INFO L124 PetriNetUnfolderBase]: 2915/4276 cut-off events. [2024-12-02 07:18:21,304 INFO L125 PetriNetUnfolderBase]: For 4387/4387 co-relation queries the response was YES. [2024-12-02 07:18:21,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11344 conditions, 4276 events. 2915/4276 cut-off events. For 4387/4387 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 22258 event pairs, 2027 based on Foata normal form. 0/3577 useless extension candidates. Maximal degree in co-relation 7981. Up to 2967 conditions per place. [2024-12-02 07:18:21,316 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 82 selfloop transitions, 16 changer transitions 0/101 dead transitions. [2024-12-02 07:18:21,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 101 transitions, 652 flow [2024-12-02 07:18:21,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-12-02 07:18:21,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-12-02 07:18:21,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-12-02 07:18:21,317 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38181818181818183 [2024-12-02 07:18:21,317 INFO L175 Difference]: Start difference. First operand has 69 places, 54 transitions, 278 flow. Second operand 9 states and 189 transitions. [2024-12-02 07:18:21,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 101 transitions, 652 flow [2024-12-02 07:18:21,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 101 transitions, 601 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-12-02 07:18:21,320 INFO L231 Difference]: Finished difference. Result has 73 places, 56 transitions, 297 flow [2024-12-02 07:18:21,320 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=297, PETRI_PLACES=73, PETRI_TRANSITIONS=56} [2024-12-02 07:18:21,320 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 17 predicate places. [2024-12-02 07:18:21,321 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 56 transitions, 297 flow [2024-12-02 07:18:21,321 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 13.071428571428571) internal successors, (183), 14 states have internal predecessors, (183), 0 states have call successors, (0), 0 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 07:18:21,321 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:18:21,321 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:18:21,326 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-12-02 07:18:21,521 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:18:21,521 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-12-02 07:18:21,522 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:18:21,522 INFO L85 PathProgramCache]: Analyzing trace with hash 57885676, now seen corresponding path program 1 times [2024-12-02 07:18:21,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:18:21,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257133748] [2024-12-02 07:18:21,522 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:18:21,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:18:21,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:18:21,628 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 07:18:21,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:18:21,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257133748] [2024-12-02 07:18:21,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257133748] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:18:21,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227421828] [2024-12-02 07:18:21,628 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:18:21,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:18:21,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:18:21,630 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:18:21,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-12-02 07:18:21,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:18:21,710 INFO L256 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 07:18:21,711 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:18:21,775 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 07:18:21,776 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:18:21,830 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 07:18:21,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227421828] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:18:21,830 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:18:21,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-12-02 07:18:21,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687577209] [2024-12-02 07:18:21,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:18:21,830 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-12-02 07:18:21,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:18:21,831 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-12-02 07:18:21,831 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-12-02 07:18:21,875 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 55 [2024-12-02 07:18:21,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 56 transitions, 297 flow. Second operand has 14 states, 14 states have (on average 13.214285714285714) internal successors, (185), 14 states have internal predecessors, (185), 0 states have call successors, (0), 0 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 07:18:21,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:18:21,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 55 [2024-12-02 07:18:21,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:18:22,310 INFO L124 PetriNetUnfolderBase]: 2805/4118 cut-off events. [2024-12-02 07:18:22,310 INFO L125 PetriNetUnfolderBase]: For 2014/2151 co-relation queries the response was YES. [2024-12-02 07:18:22,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10437 conditions, 4118 events. 2805/4118 cut-off events. For 2014/2151 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 21596 event pairs, 1937 based on Foata normal form. 44/3445 useless extension candidates. Maximal degree in co-relation 7855. Up to 3135 conditions per place. [2024-12-02 07:18:22,321 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 84 selfloop transitions, 18 changer transitions 0/105 dead transitions. [2024-12-02 07:18:22,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 105 transitions, 643 flow [2024-12-02 07:18:22,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-12-02 07:18:22,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-12-02 07:18:22,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 210 transitions. [2024-12-02 07:18:22,322 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38181818181818183 [2024-12-02 07:18:22,322 INFO L175 Difference]: Start difference. First operand has 73 places, 56 transitions, 297 flow. Second operand 10 states and 210 transitions. [2024-12-02 07:18:22,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 105 transitions, 643 flow [2024-12-02 07:18:22,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 105 transitions, 617 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-12-02 07:18:22,327 INFO L231 Difference]: Finished difference. Result has 79 places, 60 transitions, 349 flow [2024-12-02 07:18:22,327 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=349, PETRI_PLACES=79, PETRI_TRANSITIONS=60} [2024-12-02 07:18:22,327 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 23 predicate places. [2024-12-02 07:18:22,327 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 60 transitions, 349 flow [2024-12-02 07:18:22,327 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 13.214285714285714) internal successors, (185), 14 states have internal predecessors, (185), 0 states have call successors, (0), 0 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 07:18:22,327 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:18:22,327 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:18:22,333 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-12-02 07:18:22,528 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:18:22,528 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-12-02 07:18:22,528 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:18:22,528 INFO L85 PathProgramCache]: Analyzing trace with hash 312426272, now seen corresponding path program 1 times [2024-12-02 07:18:22,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:18:22,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907418002] [2024-12-02 07:18:22,528 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:18:22,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:18:22,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:18:22,719 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 07:18:22,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:18:22,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907418002] [2024-12-02 07:18:22,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907418002] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:18:22,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:18:22,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 07:18:22,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934758729] [2024-12-02 07:18:22,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:18:22,720 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-12-02 07:18:22,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:18:22,720 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-12-02 07:18:22,720 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-12-02 07:18:22,772 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 55 [2024-12-02 07:18:22,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 60 transitions, 349 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:18:22,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:18:22,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 55 [2024-12-02 07:18:22,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:18:23,168 INFO L124 PetriNetUnfolderBase]: 2913/4329 cut-off events. [2024-12-02 07:18:23,168 INFO L125 PetriNetUnfolderBase]: For 4803/4926 co-relation queries the response was YES. [2024-12-02 07:18:23,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11731 conditions, 4329 events. 2913/4329 cut-off events. For 4803/4926 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 22478 event pairs, 1251 based on Foata normal form. 0/3547 useless extension candidates. Maximal degree in co-relation 8578. Up to 2335 conditions per place. [2024-12-02 07:18:23,179 INFO L140 encePairwiseOnDemand]: 46/55 looper letters, 72 selfloop transitions, 11 changer transitions 0/87 dead transitions. [2024-12-02 07:18:23,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 87 transitions, 647 flow [2024-12-02 07:18:23,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 07:18:23,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-12-02 07:18:23,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-12-02 07:18:23,181 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.34545454545454546 [2024-12-02 07:18:23,181 INFO L175 Difference]: Start difference. First operand has 79 places, 60 transitions, 349 flow. Second operand 6 states and 114 transitions. [2024-12-02 07:18:23,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 87 transitions, 647 flow [2024-12-02 07:18:23,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 87 transitions, 617 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-12-02 07:18:23,185 INFO L231 Difference]: Finished difference. Result has 80 places, 63 transitions, 370 flow [2024-12-02 07:18:23,185 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=321, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=370, PETRI_PLACES=80, PETRI_TRANSITIONS=63} [2024-12-02 07:18:23,185 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 24 predicate places. [2024-12-02 07:18:23,185 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 63 transitions, 370 flow [2024-12-02 07:18:23,185 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:18:23,185 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:18:23,185 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:18:23,185 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-12-02 07:18:23,185 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-12-02 07:18:23,186 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:18:23,186 INFO L85 PathProgramCache]: Analyzing trace with hash 312426274, now seen corresponding path program 1 times [2024-12-02 07:18:23,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:18:23,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972328782] [2024-12-02 07:18:23,186 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:18:23,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:18:23,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:18:23,378 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 07:18:23,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:18:23,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972328782] [2024-12-02 07:18:23,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972328782] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:18:23,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642369030] [2024-12-02 07:18:23,378 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:18:23,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:18:23,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:18:23,380 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:18:23,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-12-02 07:18:23,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:18:23,453 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-12-02 07:18:23,454 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:18:23,598 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 07:18:23,599 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:18:23,710 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 36 treesize of output 32 [2024-12-02 07:18:23,801 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 07:18:23,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642369030] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:18:23,802 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:18:23,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2024-12-02 07:18:23,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893848572] [2024-12-02 07:18:23,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:18:23,802 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-12-02 07:18:23,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:18:23,803 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-12-02 07:18:23,803 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2024-12-02 07:18:24,101 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 55 [2024-12-02 07:18:24,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 63 transitions, 370 flow. Second operand has 20 states, 20 states have (on average 14.1) internal successors, (282), 20 states have internal predecessors, (282), 0 states have call successors, (0), 0 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 07:18:24,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:18:24,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 55 [2024-12-02 07:18:24,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:18:25,044 INFO L124 PetriNetUnfolderBase]: 2884/4372 cut-off events. [2024-12-02 07:18:25,044 INFO L125 PetriNetUnfolderBase]: For 6654/6866 co-relation queries the response was YES. [2024-12-02 07:18:25,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13789 conditions, 4372 events. 2884/4372 cut-off events. For 6654/6866 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 23622 event pairs, 1540 based on Foata normal form. 0/3861 useless extension candidates. Maximal degree in co-relation 9621. Up to 2178 conditions per place. [2024-12-02 07:18:25,056 INFO L140 encePairwiseOnDemand]: 43/55 looper letters, 104 selfloop transitions, 25 changer transitions 0/133 dead transitions. [2024-12-02 07:18:25,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 133 transitions, 967 flow [2024-12-02 07:18:25,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-12-02 07:18:25,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-12-02 07:18:25,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 301 transitions. [2024-12-02 07:18:25,058 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36484848484848487 [2024-12-02 07:18:25,058 INFO L175 Difference]: Start difference. First operand has 80 places, 63 transitions, 370 flow. Second operand 15 states and 301 transitions. [2024-12-02 07:18:25,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 133 transitions, 967 flow [2024-12-02 07:18:25,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 133 transitions, 958 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-12-02 07:18:25,065 INFO L231 Difference]: Finished difference. Result has 92 places, 68 transitions, 445 flow [2024-12-02 07:18:25,065 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=357, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=445, PETRI_PLACES=92, PETRI_TRANSITIONS=68} [2024-12-02 07:18:25,066 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 36 predicate places. [2024-12-02 07:18:25,066 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 68 transitions, 445 flow [2024-12-02 07:18:25,066 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 14.1) internal successors, (282), 20 states have internal predecessors, (282), 0 states have call successors, (0), 0 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 07:18:25,066 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:18:25,066 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:18:25,074 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-12-02 07:18:25,266 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:18:25,267 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-12-02 07:18:25,267 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:18:25,267 INFO L85 PathProgramCache]: Analyzing trace with hash 578323275, now seen corresponding path program 2 times [2024-12-02 07:18:25,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:18:25,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421176795] [2024-12-02 07:18:25,267 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 07:18:25,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:18:25,281 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 07:18:25,281 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:18:25,417 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 07:18:25,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:18:25,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421176795] [2024-12-02 07:18:25,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421176795] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:18:25,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913651591] [2024-12-02 07:18:25,417 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 07:18:25,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:18:25,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:18:25,419 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:18:25,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-12-02 07:18:25,502 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 07:18:25,502 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:18:25,503 INFO L256 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-12-02 07:18:25,504 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:18:25,509 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 07:18:25,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-12-02 07:18:25,550 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 16 treesize of output 11 [2024-12-02 07:18:25,557 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-12-02 07:18:25,557 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 07:18:25,602 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 07:18:25,602 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:18:25,703 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 52 treesize of output 48 [2024-12-02 07:18:25,797 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 07:18:25,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913651591] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:18:25,797 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:18:25,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-12-02 07:18:25,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178074760] [2024-12-02 07:18:25,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:18:25,797 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-12-02 07:18:25,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:18:25,798 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-12-02 07:18:25,798 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2024-12-02 07:18:29,847 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 07:18:33,894 WARN L539 Checker$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 07:18:33,937 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 55 [2024-12-02 07:18:33,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 68 transitions, 445 flow. Second operand has 14 states, 14 states have (on average 12.357142857142858) internal successors, (173), 14 states have internal predecessors, (173), 0 states have call successors, (0), 0 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 07:18:33,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:18:33,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 55 [2024-12-02 07:18:33,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:18:35,036 INFO L124 PetriNetUnfolderBase]: 5424/8061 cut-off events. [2024-12-02 07:18:35,036 INFO L125 PetriNetUnfolderBase]: For 15627/15886 co-relation queries the response was YES. [2024-12-02 07:18:35,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26412 conditions, 8061 events. 5424/8061 cut-off events. For 15627/15886 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 44928 event pairs, 1735 based on Foata normal form. 0/7354 useless extension candidates. Maximal degree in co-relation 22095. Up to 2843 conditions per place. [2024-12-02 07:18:35,066 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 144 selfloop transitions, 22 changer transitions 0/170 dead transitions. [2024-12-02 07:18:35,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 170 transitions, 1339 flow [2024-12-02 07:18:35,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-12-02 07:18:35,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-12-02 07:18:35,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 275 transitions. [2024-12-02 07:18:35,068 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2024-12-02 07:18:35,068 INFO L175 Difference]: Start difference. First operand has 92 places, 68 transitions, 445 flow. Second operand 15 states and 275 transitions. [2024-12-02 07:18:35,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 170 transitions, 1339 flow [2024-12-02 07:18:35,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 170 transitions, 1273 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-12-02 07:18:35,082 INFO L231 Difference]: Finished difference. Result has 101 places, 75 transitions, 506 flow [2024-12-02 07:18:35,082 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=506, PETRI_PLACES=101, PETRI_TRANSITIONS=75} [2024-12-02 07:18:35,082 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 45 predicate places. [2024-12-02 07:18:35,082 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 75 transitions, 506 flow [2024-12-02 07:18:35,083 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 12.357142857142858) internal successors, (173), 14 states have internal predecessors, (173), 0 states have call successors, (0), 0 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 07:18:35,083 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:18:35,083 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:18:35,088 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-12-02 07:18:35,283 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-12-02 07:18:35,283 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-12-02 07:18:35,283 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:18:35,284 INFO L85 PathProgramCache]: Analyzing trace with hash 578323277, now seen corresponding path program 1 times [2024-12-02 07:18:35,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:18:35,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842310885] [2024-12-02 07:18:35,284 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:18:35,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:18:35,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:18:35,494 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-12-02 07:18:35,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:18:35,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842310885] [2024-12-02 07:18:35,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842310885] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:18:35,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089100355] [2024-12-02 07:18:35,495 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:18:35,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:18:35,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:18:35,497 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:18:35,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-12-02 07:18:35,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:18:35,579 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-12-02 07:18:35,580 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:18:35,674 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-12-02 07:18:35,675 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:18:35,741 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 07:18:35,762 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-12-02 07:18:35,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089100355] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:18:35,762 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:18:35,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2024-12-02 07:18:35,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477586174] [2024-12-02 07:18:35,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:18:35,762 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-12-02 07:18:35,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:18:35,763 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-12-02 07:18:35,763 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2024-12-02 07:18:35,958 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 55 [2024-12-02 07:18:35,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 75 transitions, 506 flow. Second operand has 18 states, 18 states have (on average 14.166666666666666) internal successors, (255), 18 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:18:35,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:18:35,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 55 [2024-12-02 07:18:35,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:18:37,086 INFO L124 PetriNetUnfolderBase]: 4930/7464 cut-off events. [2024-12-02 07:18:37,086 INFO L125 PetriNetUnfolderBase]: For 17350/17590 co-relation queries the response was YES. [2024-12-02 07:18:37,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27169 conditions, 7464 events. 4930/7464 cut-off events. For 17350/17590 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 42411 event pairs, 2028 based on Foata normal form. 0/7168 useless extension candidates. Maximal degree in co-relation 22735. Up to 3337 conditions per place. [2024-12-02 07:18:37,112 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 142 selfloop transitions, 22 changer transitions 0/168 dead transitions. [2024-12-02 07:18:37,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 168 transitions, 1339 flow [2024-12-02 07:18:37,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-12-02 07:18:37,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-12-02 07:18:37,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 291 transitions. [2024-12-02 07:18:37,114 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.37792207792207794 [2024-12-02 07:18:37,114 INFO L175 Difference]: Start difference. First operand has 101 places, 75 transitions, 506 flow. Second operand 14 states and 291 transitions. [2024-12-02 07:18:37,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 168 transitions, 1339 flow [2024-12-02 07:18:37,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 168 transitions, 1310 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-12-02 07:18:37,128 INFO L231 Difference]: Finished difference. Result has 105 places, 74 transitions, 517 flow [2024-12-02 07:18:37,128 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=473, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=517, PETRI_PLACES=105, PETRI_TRANSITIONS=74} [2024-12-02 07:18:37,129 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 49 predicate places. [2024-12-02 07:18:37,129 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 74 transitions, 517 flow [2024-12-02 07:18:37,129 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 14.166666666666666) internal successors, (255), 18 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:18:37,129 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:18:37,129 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:18:37,137 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-12-02 07:18:37,329 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-12-02 07:18:37,330 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-12-02 07:18:37,330 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:18:37,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1349303560, now seen corresponding path program 2 times [2024-12-02 07:18:37,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:18:37,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968905075] [2024-12-02 07:18:37,330 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 07:18:37,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:18:37,347 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 07:18:37,347 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:18:37,640 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 07:18:37,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:18:37,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968905075] [2024-12-02 07:18:37,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968905075] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:18:37,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222554890] [2024-12-02 07:18:37,640 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 07:18:37,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:18:37,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:18:37,642 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:18:37,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-12-02 07:18:37,709 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 07:18:37,709 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:18:37,710 INFO L256 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-12-02 07:18:37,712 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:18:37,721 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 07:18:37,818 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-12-02 07:18:37,818 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 32 treesize of output 27 [2024-12-02 07:18:37,959 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 07:18:37,959 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:18:38,164 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 07:18:38,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222554890] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:18:38,165 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:18:38,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 23 [2024-12-02 07:18:38,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113614095] [2024-12-02 07:18:38,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:18:38,165 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-12-02 07:18:38,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:18:38,166 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-12-02 07:18:38,166 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2024-12-02 07:18:38,596 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 55 [2024-12-02 07:18:38,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 74 transitions, 517 flow. Second operand has 25 states, 25 states have (on average 11.0) internal successors, (275), 25 states have internal predecessors, (275), 0 states have call successors, (0), 0 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 07:18:38,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:18:38,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 55 [2024-12-02 07:18:38,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:18:41,052 INFO L124 PetriNetUnfolderBase]: 6524/9258 cut-off events. [2024-12-02 07:18:41,052 INFO L125 PetriNetUnfolderBase]: For 26573/27050 co-relation queries the response was YES. [2024-12-02 07:18:41,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34664 conditions, 9258 events. 6524/9258 cut-off events. For 26573/27050 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 46978 event pairs, 1481 based on Foata normal form. 2/9257 useless extension candidates. Maximal degree in co-relation 29237. Up to 2196 conditions per place. [2024-12-02 07:18:41,093 INFO L140 encePairwiseOnDemand]: 43/55 looper letters, 198 selfloop transitions, 31 changer transitions 0/232 dead transitions. [2024-12-02 07:18:41,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 232 transitions, 1854 flow [2024-12-02 07:18:41,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-12-02 07:18:41,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-12-02 07:18:41,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 391 transitions. [2024-12-02 07:18:41,096 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3231404958677686 [2024-12-02 07:18:41,096 INFO L175 Difference]: Start difference. First operand has 105 places, 74 transitions, 517 flow. Second operand 22 states and 391 transitions. [2024-12-02 07:18:41,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 232 transitions, 1854 flow [2024-12-02 07:18:41,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 232 transitions, 1718 flow, removed 6 selfloop flow, removed 14 redundant places. [2024-12-02 07:18:41,119 INFO L231 Difference]: Finished difference. Result has 118 places, 85 transitions, 647 flow [2024-12-02 07:18:41,119 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=647, PETRI_PLACES=118, PETRI_TRANSITIONS=85} [2024-12-02 07:18:41,120 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 62 predicate places. [2024-12-02 07:18:41,120 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 85 transitions, 647 flow [2024-12-02 07:18:41,120 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 11.0) internal successors, (275), 25 states have internal predecessors, (275), 0 states have call successors, (0), 0 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 07:18:41,120 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:18:41,120 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:18:41,127 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-12-02 07:18:41,320 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-12-02 07:18:41,321 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-12-02 07:18:41,321 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:18:41,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1349303558, now seen corresponding path program 1 times [2024-12-02 07:18:41,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:18:41,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689621160] [2024-12-02 07:18:41,321 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:18:41,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:18:41,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:18:41,563 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 07:18:41,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:18:41,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689621160] [2024-12-02 07:18:41,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689621160] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:18:41,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929145202] [2024-12-02 07:18:41,563 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:18:41,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:18:41,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:18:41,565 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:18:41,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-12-02 07:18:41,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:18:41,634 INFO L256 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-12-02 07:18:41,636 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:18:41,642 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 07:18:41,645 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 07:18:41,715 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-12-02 07:18:41,715 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 07:18:41,733 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 31 treesize of output 24 [2024-12-02 07:18:42,061 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-12-02 07:18:42,061 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:18:42,499 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-12-02 07:18:42,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929145202] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:18:42,499 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:18:42,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 19 [2024-12-02 07:18:42,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55830822] [2024-12-02 07:18:42,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:18:42,500 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-12-02 07:18:42,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:18:42,500 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-12-02 07:18:42,501 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2024-12-02 07:18:42,696 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 55 [2024-12-02 07:18:42,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 85 transitions, 647 flow. Second operand has 21 states, 21 states have (on average 10.095238095238095) internal successors, (212), 21 states have internal predecessors, (212), 0 states have call successors, (0), 0 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 07:18:42,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:18:42,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 55 [2024-12-02 07:18:42,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:18:44,709 INFO L124 PetriNetUnfolderBase]: 4783/7061 cut-off events. [2024-12-02 07:18:44,709 INFO L125 PetriNetUnfolderBase]: For 21077/21781 co-relation queries the response was YES. [2024-12-02 07:18:44,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27318 conditions, 7061 events. 4783/7061 cut-off events. For 21077/21781 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 36633 event pairs, 1582 based on Foata normal form. 321/7194 useless extension candidates. Maximal degree in co-relation 22936. Up to 2722 conditions per place. [2024-12-02 07:18:44,744 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 153 selfloop transitions, 25 changer transitions 0/184 dead transitions. [2024-12-02 07:18:44,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 184 transitions, 1474 flow [2024-12-02 07:18:44,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-12-02 07:18:44,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-12-02 07:18:44,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 259 transitions. [2024-12-02 07:18:44,745 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.31393939393939396 [2024-12-02 07:18:44,745 INFO L175 Difference]: Start difference. First operand has 118 places, 85 transitions, 647 flow. Second operand 15 states and 259 transitions. [2024-12-02 07:18:44,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 184 transitions, 1474 flow [2024-12-02 07:18:44,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 184 transitions, 1432 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-12-02 07:18:44,777 INFO L231 Difference]: Finished difference. Result has 123 places, 85 transitions, 660 flow [2024-12-02 07:18:44,777 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=605, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=660, PETRI_PLACES=123, PETRI_TRANSITIONS=85} [2024-12-02 07:18:44,778 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 67 predicate places. [2024-12-02 07:18:44,778 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 85 transitions, 660 flow [2024-12-02 07:18:44,778 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 10.095238095238095) internal successors, (212), 21 states have internal predecessors, (212), 0 states have call successors, (0), 0 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 07:18:44,778 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:18:44,778 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:18:44,785 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-12-02 07:18:44,978 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-12-02 07:18:44,979 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-12-02 07:18:44,979 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:18:44,979 INFO L85 PathProgramCache]: Analyzing trace with hash 297965264, now seen corresponding path program 1 times [2024-12-02 07:18:44,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:18:44,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004708740] [2024-12-02 07:18:44,980 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:18:44,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:18:44,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:18:45,105 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 07:18:45,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:18:45,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004708740] [2024-12-02 07:18:45,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004708740] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:18:45,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719652259] [2024-12-02 07:18:45,105 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:18:45,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:18:45,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:18:45,107 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:18:45,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-12-02 07:18:45,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:18:45,215 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-12-02 07:18:45,216 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:18:45,326 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 07:18:45,327 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:18:45,392 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 07:18:45,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719652259] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:18:45,392 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:18:45,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-12-02 07:18:45,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796991858] [2024-12-02 07:18:45,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:18:45,393 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-12-02 07:18:45,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:18:45,393 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-12-02 07:18:45,394 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2024-12-02 07:18:45,459 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 55 [2024-12-02 07:18:45,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 85 transitions, 660 flow. Second operand has 15 states, 15 states have (on average 13.466666666666667) internal successors, (202), 15 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 07:18:45,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:18:45,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 55 [2024-12-02 07:18:45,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:18:46,363 INFO L124 PetriNetUnfolderBase]: 5603/7930 cut-off events. [2024-12-02 07:18:46,363 INFO L125 PetriNetUnfolderBase]: For 28402/29528 co-relation queries the response was YES. [2024-12-02 07:18:46,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31336 conditions, 7930 events. 5603/7930 cut-off events. For 28402/29528 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 38135 event pairs, 3830 based on Foata normal form. 177/7888 useless extension candidates. Maximal degree in co-relation 28160. Up to 6817 conditions per place. [2024-12-02 07:18:46,402 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 88 selfloop transitions, 23 changer transitions 0/116 dead transitions. [2024-12-02 07:18:46,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 116 transitions, 1018 flow [2024-12-02 07:18:46,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-12-02 07:18:46,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-12-02 07:18:46,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-12-02 07:18:46,403 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36 [2024-12-02 07:18:46,403 INFO L175 Difference]: Start difference. First operand has 123 places, 85 transitions, 660 flow. Second operand 10 states and 198 transitions. [2024-12-02 07:18:46,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 116 transitions, 1018 flow [2024-12-02 07:18:46,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 116 transitions, 960 flow, removed 0 selfloop flow, removed 14 redundant places. [2024-12-02 07:18:46,420 INFO L231 Difference]: Finished difference. Result has 118 places, 84 transitions, 652 flow [2024-12-02 07:18:46,420 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=596, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=652, PETRI_PLACES=118, PETRI_TRANSITIONS=84} [2024-12-02 07:18:46,421 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 62 predicate places. [2024-12-02 07:18:46,421 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 84 transitions, 652 flow [2024-12-02 07:18:46,421 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 13.466666666666667) internal successors, (202), 15 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 07:18:46,421 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:18:46,421 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-12-02 07:18:46,427 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-12-02 07:18:46,621 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:18:46,622 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-12-02 07:18:46,622 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:18:46,622 INFO L85 PathProgramCache]: Analyzing trace with hash 504381784, now seen corresponding path program 2 times [2024-12-02 07:18:46,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:18:46,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763407225] [2024-12-02 07:18:46,622 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 07:18:46,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:18:46,639 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 07:18:46,639 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:18:46,806 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 07:18:46,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:18:46,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763407225] [2024-12-02 07:18:46,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763407225] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:18:46,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318058028] [2024-12-02 07:18:46,807 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 07:18:46,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:18:46,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:18:46,808 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:18:46,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-12-02 07:18:46,887 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 07:18:46,887 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:18:46,888 INFO L256 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-12-02 07:18:46,890 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:18:46,983 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 07:18:46,983 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:18:47,056 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 07:18:47,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318058028] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:18:47,056 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:18:47,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2024-12-02 07:18:47,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049802347] [2024-12-02 07:18:47,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:18:47,057 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-12-02 07:18:47,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:18:47,057 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-12-02 07:18:47,057 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2024-12-02 07:18:47,107 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 55 [2024-12-02 07:18:47,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 84 transitions, 652 flow. Second operand has 20 states, 20 states have (on average 13.3) internal successors, (266), 20 states have internal predecessors, (266), 0 states have call successors, (0), 0 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 07:18:47,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:18:47,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 55 [2024-12-02 07:18:47,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:18:48,586 INFO L124 PetriNetUnfolderBase]: 9759/13820 cut-off events. [2024-12-02 07:18:48,586 INFO L125 PetriNetUnfolderBase]: For 34689/35658 co-relation queries the response was YES. [2024-12-02 07:18:48,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53609 conditions, 13820 events. 9759/13820 cut-off events. For 34689/35658 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 73280 event pairs, 4565 based on Foata normal form. 146/13616 useless extension candidates. Maximal degree in co-relation 36042. Up to 7116 conditions per place. [2024-12-02 07:18:48,643 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 172 selfloop transitions, 34 changer transitions 0/209 dead transitions. [2024-12-02 07:18:48,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 209 transitions, 1783 flow [2024-12-02 07:18:48,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-12-02 07:18:48,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-12-02 07:18:48,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 284 transitions. [2024-12-02 07:18:48,644 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3972027972027972 [2024-12-02 07:18:48,644 INFO L175 Difference]: Start difference. First operand has 118 places, 84 transitions, 652 flow. Second operand 13 states and 284 transitions. [2024-12-02 07:18:48,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 209 transitions, 1783 flow [2024-12-02 07:18:48,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 209 transitions, 1723 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-12-02 07:18:48,698 INFO L231 Difference]: Finished difference. Result has 128 places, 94 transitions, 812 flow [2024-12-02 07:18:48,699 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=610, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=812, PETRI_PLACES=128, PETRI_TRANSITIONS=94} [2024-12-02 07:18:48,699 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 72 predicate places. [2024-12-02 07:18:48,699 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 94 transitions, 812 flow [2024-12-02 07:18:48,699 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 13.3) internal successors, (266), 20 states have internal predecessors, (266), 0 states have call successors, (0), 0 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 07:18:48,699 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:18:48,699 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:18:48,706 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-12-02 07:18:48,899 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:18:48,899 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-12-02 07:18:48,900 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:18:48,900 INFO L85 PathProgramCache]: Analyzing trace with hash -454942228, now seen corresponding path program 2 times [2024-12-02 07:18:48,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:18:48,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280442916] [2024-12-02 07:18:48,900 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 07:18:48,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:18:48,913 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 07:18:48,913 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:18:49,245 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 07:18:49,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:18:49,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280442916] [2024-12-02 07:18:49,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280442916] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:18:49,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045207626] [2024-12-02 07:18:49,245 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 07:18:49,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:18:49,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:18:49,247 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:18:49,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-12-02 07:18:49,346 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 07:18:49,346 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:18:49,347 INFO L256 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-12-02 07:18:49,349 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:18:49,353 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 07:18:49,408 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-12-02 07:18:49,408 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 18 treesize of output 17 [2024-12-02 07:18:49,416 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-12-02 07:18:49,416 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 07:18:49,630 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-12-02 07:18:49,630 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:18:49,932 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 65 treesize of output 61 [2024-12-02 07:18:50,047 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-12-02 07:18:50,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045207626] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:18:50,047 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:18:50,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 23 [2024-12-02 07:18:50,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638321430] [2024-12-02 07:18:50,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:18:50,047 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-12-02 07:18:50,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:18:50,048 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-12-02 07:18:50,048 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2024-12-02 07:18:50,352 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 55 [2024-12-02 07:18:50,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 94 transitions, 812 flow. Second operand has 25 states, 25 states have (on average 11.4) internal successors, (285), 25 states have internal predecessors, (285), 0 states have call successors, (0), 0 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 07:18:50,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:18:50,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 55 [2024-12-02 07:18:50,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:18:52,061 INFO L124 PetriNetUnfolderBase]: 9491/13207 cut-off events. [2024-12-02 07:18:52,061 INFO L125 PetriNetUnfolderBase]: For 55770/58052 co-relation queries the response was YES. [2024-12-02 07:18:52,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55706 conditions, 13207 events. 9491/13207 cut-off events. For 55770/58052 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 68800 event pairs, 1820 based on Foata normal form. 463/13330 useless extension candidates. Maximal degree in co-relation 43695. Up to 3879 conditions per place. [2024-12-02 07:18:52,128 INFO L140 encePairwiseOnDemand]: 47/55 looper letters, 175 selfloop transitions, 19 changer transitions 0/199 dead transitions. [2024-12-02 07:18:52,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 199 transitions, 2061 flow [2024-12-02 07:18:52,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-12-02 07:18:52,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-12-02 07:18:52,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-12-02 07:18:52,129 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3477272727272727 [2024-12-02 07:18:52,129 INFO L175 Difference]: Start difference. First operand has 128 places, 94 transitions, 812 flow. Second operand 8 states and 153 transitions. [2024-12-02 07:18:52,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 199 transitions, 2061 flow [2024-12-02 07:18:52,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 199 transitions, 2004 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-12-02 07:18:52,182 INFO L231 Difference]: Finished difference. Result has 130 places, 95 transitions, 826 flow [2024-12-02 07:18:52,182 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=769, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=826, PETRI_PLACES=130, PETRI_TRANSITIONS=95} [2024-12-02 07:18:52,182 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 74 predicate places. [2024-12-02 07:18:52,183 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 95 transitions, 826 flow [2024-12-02 07:18:52,183 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 11.4) internal successors, (285), 25 states have internal predecessors, (285), 0 states have call successors, (0), 0 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 07:18:52,183 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:18:52,183 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:18:52,188 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-12-02 07:18:52,383 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-12-02 07:18:52,383 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-12-02 07:18:52,384 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:18:52,384 INFO L85 PathProgramCache]: Analyzing trace with hash -454942226, now seen corresponding path program 1 times [2024-12-02 07:18:52,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:18:52,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085114711] [2024-12-02 07:18:52,384 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:18:52,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:18:52,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:18:52,635 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-12-02 07:18:52,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:18:52,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085114711] [2024-12-02 07:18:52,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085114711] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:18:52,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950300375] [2024-12-02 07:18:52,635 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:18:52,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:18:52,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:18:52,637 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:18:52,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-12-02 07:18:52,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:18:52,722 INFO L256 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-12-02 07:18:52,723 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:18:52,981 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 07:18:52,981 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:18:53,213 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 36 treesize of output 32 [2024-12-02 07:18:53,389 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 07:18:53,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950300375] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:18:53,389 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:18:53,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 27 [2024-12-02 07:18:53,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303974327] [2024-12-02 07:18:53,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:18:53,389 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-12-02 07:18:53,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:18:53,390 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-12-02 07:18:53,390 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2024-12-02 07:18:53,795 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 55 [2024-12-02 07:18:53,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 95 transitions, 826 flow. Second operand has 28 states, 28 states have (on average 13.25) internal successors, (371), 28 states have internal predecessors, (371), 0 states have call successors, (0), 0 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 07:18:53,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:18:53,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 55 [2024-12-02 07:18:53,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:18:56,943 INFO L124 PetriNetUnfolderBase]: 12117/16793 cut-off events. [2024-12-02 07:18:56,943 INFO L125 PetriNetUnfolderBase]: For 77718/80676 co-relation queries the response was YES. [2024-12-02 07:18:56,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74940 conditions, 16793 events. 12117/16793 cut-off events. For 77718/80676 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 90061 event pairs, 2519 based on Foata normal form. 605/16954 useless extension candidates. Maximal degree in co-relation 60346. Up to 2191 conditions per place. [2024-12-02 07:18:57,016 INFO L140 encePairwiseOnDemand]: 43/55 looper letters, 397 selfloop transitions, 48 changer transitions 0/450 dead transitions. [2024-12-02 07:18:57,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 450 transitions, 4125 flow [2024-12-02 07:18:57,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-12-02 07:18:57,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-12-02 07:18:57,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 707 transitions. [2024-12-02 07:18:57,017 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36727272727272725 [2024-12-02 07:18:57,017 INFO L175 Difference]: Start difference. First operand has 130 places, 95 transitions, 826 flow. Second operand 35 states and 707 transitions. [2024-12-02 07:18:57,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 450 transitions, 4125 flow [2024-12-02 07:18:57,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 450 transitions, 4058 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-12-02 07:18:57,079 INFO L231 Difference]: Finished difference. Result has 158 places, 109 transitions, 980 flow [2024-12-02 07:18:57,079 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=780, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=980, PETRI_PLACES=158, PETRI_TRANSITIONS=109} [2024-12-02 07:18:57,079 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 102 predicate places. [2024-12-02 07:18:57,079 INFO L471 AbstractCegarLoop]: Abstraction has has 158 places, 109 transitions, 980 flow [2024-12-02 07:18:57,079 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 13.25) internal successors, (371), 28 states have internal predecessors, (371), 0 states have call successors, (0), 0 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 07:18:57,079 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:18:57,079 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:18:57,085 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-12-02 07:18:57,280 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-12-02 07:18:57,280 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-12-02 07:18:57,280 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:18:57,280 INFO L85 PathProgramCache]: Analyzing trace with hash -952144469, now seen corresponding path program 1 times [2024-12-02 07:18:57,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:18:57,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321028888] [2024-12-02 07:18:57,280 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:18:57,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:18:57,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:18:57,389 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 07:18:57,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:18:57,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321028888] [2024-12-02 07:18:57,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321028888] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:18:57,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838720029] [2024-12-02 07:18:57,390 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:18:57,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:18:57,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:18:57,392 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:18:57,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-12-02 07:18:57,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:18:57,489 INFO L256 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-12-02 07:18:57,490 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:18:57,605 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-12-02 07:18:57,606 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:18:57,698 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-12-02 07:18:57,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838720029] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:18:57,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:18:57,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2024-12-02 07:18:57,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388439570] [2024-12-02 07:18:57,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:18:57,699 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-12-02 07:18:57,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:18:57,699 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-12-02 07:18:57,699 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2024-12-02 07:18:57,801 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 55 [2024-12-02 07:18:57,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 109 transitions, 980 flow. Second operand has 20 states, 20 states have (on average 13.5) internal successors, (270), 20 states have internal predecessors, (270), 0 states have call successors, (0), 0 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 07:18:57,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:18:57,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 55 [2024-12-02 07:18:57,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:18:59,496 INFO L124 PetriNetUnfolderBase]: 8527/12268 cut-off events. [2024-12-02 07:18:59,496 INFO L125 PetriNetUnfolderBase]: For 57985/59448 co-relation queries the response was YES. [2024-12-02 07:18:59,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54875 conditions, 12268 events. 8527/12268 cut-off events. For 57985/59448 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 64901 event pairs, 4328 based on Foata normal form. 337/12431 useless extension candidates. Maximal degree in co-relation 43446. Up to 6290 conditions per place. [2024-12-02 07:18:59,571 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 147 selfloop transitions, 30 changer transitions 0/188 dead transitions. [2024-12-02 07:18:59,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 188 transitions, 1924 flow [2024-12-02 07:18:59,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-12-02 07:18:59,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-12-02 07:18:59,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 236 transitions. [2024-12-02 07:18:59,572 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3575757575757576 [2024-12-02 07:18:59,572 INFO L175 Difference]: Start difference. First operand has 158 places, 109 transitions, 980 flow. Second operand 12 states and 236 transitions. [2024-12-02 07:18:59,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 188 transitions, 1924 flow [2024-12-02 07:18:59,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 188 transitions, 1690 flow, removed 14 selfloop flow, removed 25 redundant places. [2024-12-02 07:18:59,699 INFO L231 Difference]: Finished difference. Result has 147 places, 113 transitions, 947 flow [2024-12-02 07:18:59,699 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=833, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=947, PETRI_PLACES=147, PETRI_TRANSITIONS=113} [2024-12-02 07:18:59,699 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 91 predicate places. [2024-12-02 07:18:59,699 INFO L471 AbstractCegarLoop]: Abstraction has has 147 places, 113 transitions, 947 flow [2024-12-02 07:18:59,700 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 13.5) internal successors, (270), 20 states have internal predecessors, (270), 0 states have call successors, (0), 0 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 07:18:59,700 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:18:59,700 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:18:59,705 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-12-02 07:18:59,900 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-12-02 07:18:59,900 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-12-02 07:18:59,900 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:18:59,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1809192991, now seen corresponding path program 1 times [2024-12-02 07:18:59,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:18:59,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366941946] [2024-12-02 07:18:59,901 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:18:59,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:18:59,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:18:59,933 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-12-02 07:18:59,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:18:59,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366941946] [2024-12-02 07:18:59,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366941946] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:18:59,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:18:59,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 07:18:59,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436694564] [2024-12-02 07:18:59,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:18:59,934 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 07:18:59,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:18:59,934 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 07:18:59,934 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 07:18:59,934 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 55 [2024-12-02 07:18:59,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 113 transitions, 947 flow. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:18:59,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:18:59,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 55 [2024-12-02 07:18:59,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:19:00,995 INFO L124 PetriNetUnfolderBase]: 7229/10795 cut-off events. [2024-12-02 07:19:00,995 INFO L125 PetriNetUnfolderBase]: For 50247/51703 co-relation queries the response was YES. [2024-12-02 07:19:01,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46933 conditions, 10795 events. 7229/10795 cut-off events. For 50247/51703 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 59510 event pairs, 1752 based on Foata normal form. 99/10733 useless extension candidates. Maximal degree in co-relation 38000. Up to 9140 conditions per place. [2024-12-02 07:19:01,040 INFO L140 encePairwiseOnDemand]: 50/55 looper letters, 127 selfloop transitions, 5 changer transitions 1/145 dead transitions. [2024-12-02 07:19:01,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 145 transitions, 1431 flow [2024-12-02 07:19:01,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 07:19:01,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 07:19:01,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 86 transitions. [2024-12-02 07:19:01,041 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5212121212121212 [2024-12-02 07:19:01,041 INFO L175 Difference]: Start difference. First operand has 147 places, 113 transitions, 947 flow. Second operand 3 states and 86 transitions. [2024-12-02 07:19:01,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 145 transitions, 1431 flow [2024-12-02 07:19:01,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 145 transitions, 1385 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-12-02 07:19:01,089 INFO L231 Difference]: Finished difference. Result has 142 places, 117 transitions, 945 flow [2024-12-02 07:19:01,089 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=901, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=945, PETRI_PLACES=142, PETRI_TRANSITIONS=117} [2024-12-02 07:19:01,090 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 86 predicate places. [2024-12-02 07:19:01,090 INFO L471 AbstractCegarLoop]: Abstraction has has 142 places, 117 transitions, 945 flow [2024-12-02 07:19:01,090 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:19:01,090 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:19:01,090 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2024-12-02 07:19:01,090 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-12-02 07:19:01,090 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-12-02 07:19:01,090 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:19:01,090 INFO L85 PathProgramCache]: Analyzing trace with hash -105805124, now seen corresponding path program 3 times [2024-12-02 07:19:01,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:19:01,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929360993] [2024-12-02 07:19:01,090 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 07:19:01,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:19:01,101 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-12-02 07:19:01,101 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:19:01,305 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-12-02 07:19:01,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:19:01,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929360993] [2024-12-02 07:19:01,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929360993] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:19:01,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508713744] [2024-12-02 07:19:01,305 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 07:19:01,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:19:01,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:19:01,307 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:19:01,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-12-02 07:19:01,395 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-12-02 07:19:01,395 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:19:01,396 INFO L256 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-12-02 07:19:01,398 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:19:01,401 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 07:19:01,451 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-12-02 07:19:01,452 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 18 treesize of output 17 [2024-12-02 07:19:01,460 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-12-02 07:19:01,460 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 07:19:01,513 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-12-02 07:19:01,513 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:19:01,674 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 42 treesize of output 38 [2024-12-02 07:19:01,731 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-12-02 07:19:01,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508713744] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:19:01,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:19:01,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2024-12-02 07:19:01,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964171619] [2024-12-02 07:19:01,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:19:01,732 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-12-02 07:19:01,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:19:01,732 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-12-02 07:19:01,733 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2024-12-02 07:19:01,942 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 55 [2024-12-02 07:19:01,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 117 transitions, 945 flow. Second operand has 18 states, 18 states have (on average 11.333333333333334) internal successors, (204), 18 states have internal predecessors, (204), 0 states have call successors, (0), 0 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 07:19:01,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:19:01,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 55 [2024-12-02 07:19:01,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:19:03,461 INFO L124 PetriNetUnfolderBase]: 8806/12741 cut-off events. [2024-12-02 07:19:03,462 INFO L125 PetriNetUnfolderBase]: For 52824/53652 co-relation queries the response was YES. [2024-12-02 07:19:03,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57067 conditions, 12741 events. 8806/12741 cut-off events. For 52824/53652 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 69246 event pairs, 2885 based on Foata normal form. 200/12778 useless extension candidates. Maximal degree in co-relation 48247. Up to 5871 conditions per place. [2024-12-02 07:19:03,518 INFO L140 encePairwiseOnDemand]: 47/55 looper letters, 202 selfloop transitions, 26 changer transitions 0/237 dead transitions. [2024-12-02 07:19:03,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 237 transitions, 2179 flow [2024-12-02 07:19:03,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-12-02 07:19:03,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-12-02 07:19:03,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-12-02 07:19:03,519 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35 [2024-12-02 07:19:03,519 INFO L175 Difference]: Start difference. First operand has 142 places, 117 transitions, 945 flow. Second operand 8 states and 154 transitions. [2024-12-02 07:19:03,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 237 transitions, 2179 flow [2024-12-02 07:19:03,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 237 transitions, 2168 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-12-02 07:19:03,605 INFO L231 Difference]: Finished difference. Result has 147 places, 117 transitions, 1003 flow [2024-12-02 07:19:03,605 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=928, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1003, PETRI_PLACES=147, PETRI_TRANSITIONS=117} [2024-12-02 07:19:03,605 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 91 predicate places. [2024-12-02 07:19:03,605 INFO L471 AbstractCegarLoop]: Abstraction has has 147 places, 117 transitions, 1003 flow [2024-12-02 07:19:03,605 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 11.333333333333334) internal successors, (204), 18 states have internal predecessors, (204), 0 states have call successors, (0), 0 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 07:19:03,605 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:19:03,605 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:19:03,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-12-02 07:19:03,806 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-12-02 07:19:03,806 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-12-02 07:19:03,806 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:19:03,806 INFO L85 PathProgramCache]: Analyzing trace with hash -609665983, now seen corresponding path program 1 times [2024-12-02 07:19:03,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:19:03,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624563908] [2024-12-02 07:19:03,806 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:19:03,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:19:03,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:19:03,842 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-12-02 07:19:03,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:19:03,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624563908] [2024-12-02 07:19:03,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624563908] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:19:03,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:19:03,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 07:19:03,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14258801] [2024-12-02 07:19:03,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:19:03,843 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 07:19:03,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:19:03,844 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 07:19:03,844 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 07:19:03,848 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 55 [2024-12-02 07:19:03,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 117 transitions, 1003 flow. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:19:03,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:19:03,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 55 [2024-12-02 07:19:03,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:19:04,955 INFO L124 PetriNetUnfolderBase]: 8191/11802 cut-off events. [2024-12-02 07:19:04,955 INFO L125 PetriNetUnfolderBase]: For 73860/75827 co-relation queries the response was YES. [2024-12-02 07:19:04,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55914 conditions, 11802 events. 8191/11802 cut-off events. For 73860/75827 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 62342 event pairs, 2347 based on Foata normal form. 535/11876 useless extension candidates. Maximal degree in co-relation 46334. Up to 6376 conditions per place. [2024-12-02 07:19:05,002 INFO L140 encePairwiseOnDemand]: 50/55 looper letters, 131 selfloop transitions, 19 changer transitions 0/156 dead transitions. [2024-12-02 07:19:05,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 156 transitions, 1689 flow [2024-12-02 07:19:05,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 07:19:05,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 07:19:05,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 91 transitions. [2024-12-02 07:19:05,003 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41363636363636364 [2024-12-02 07:19:05,003 INFO L175 Difference]: Start difference. First operand has 147 places, 117 transitions, 1003 flow. Second operand 4 states and 91 transitions. [2024-12-02 07:19:05,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 156 transitions, 1689 flow [2024-12-02 07:19:05,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 156 transitions, 1617 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-12-02 07:19:05,057 INFO L231 Difference]: Finished difference. Result has 142 places, 113 transitions, 968 flow [2024-12-02 07:19:05,058 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=930, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=968, PETRI_PLACES=142, PETRI_TRANSITIONS=113} [2024-12-02 07:19:05,058 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 86 predicate places. [2024-12-02 07:19:05,058 INFO L471 AbstractCegarLoop]: Abstraction has has 142 places, 113 transitions, 968 flow [2024-12-02 07:19:05,058 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:19:05,058 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:19:05,058 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:19:05,058 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-12-02 07:19:05,058 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-12-02 07:19:05,058 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:19:05,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1251195837, now seen corresponding path program 1 times [2024-12-02 07:19:05,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:19:05,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795141134] [2024-12-02 07:19:05,058 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:19:05,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:19:05,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:19:05,126 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 07:19:05,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:19:05,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795141134] [2024-12-02 07:19:05,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795141134] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:19:05,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415120459] [2024-12-02 07:19:05,127 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:19:05,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:19:05,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:19:05,128 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:19:05,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-12-02 07:19:05,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:19:05,213 INFO L256 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-12-02 07:19:05,214 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:19:05,241 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 07:19:05,241 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:19:05,268 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 07:19:05,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415120459] provided 1 perfect and 1 imperfect interpolant sequences [2024-12-02 07:19:05,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-12-02 07:19:05,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2024-12-02 07:19:05,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489769787] [2024-12-02 07:19:05,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:19:05,269 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 07:19:05,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:19:05,269 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 07:19:05,269 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-12-02 07:19:05,275 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 55 [2024-12-02 07:19:05,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 113 transitions, 968 flow. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:19:05,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:19:05,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 55 [2024-12-02 07:19:05,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:19:06,284 INFO L124 PetriNetUnfolderBase]: 7672/11318 cut-off events. [2024-12-02 07:19:06,284 INFO L125 PetriNetUnfolderBase]: For 57585/58191 co-relation queries the response was YES. [2024-12-02 07:19:06,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52694 conditions, 11318 events. 7672/11318 cut-off events. For 57585/58191 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 62521 event pairs, 2291 based on Foata normal form. 328/11458 useless extension candidates. Maximal degree in co-relation 43307. Up to 6117 conditions per place. [2024-12-02 07:19:06,345 INFO L140 encePairwiseOnDemand]: 49/55 looper letters, 128 selfloop transitions, 13 changer transitions 0/150 dead transitions. [2024-12-02 07:19:06,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 150 transitions, 1497 flow [2024-12-02 07:19:06,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 07:19:06,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-02 07:19:06,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 105 transitions. [2024-12-02 07:19:06,346 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38181818181818183 [2024-12-02 07:19:06,346 INFO L175 Difference]: Start difference. First operand has 142 places, 113 transitions, 968 flow. Second operand 5 states and 105 transitions. [2024-12-02 07:19:06,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 150 transitions, 1497 flow [2024-12-02 07:19:06,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 150 transitions, 1435 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-12-02 07:19:06,465 INFO L231 Difference]: Finished difference. Result has 142 places, 110 transitions, 924 flow [2024-12-02 07:19:06,465 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=898, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=924, PETRI_PLACES=142, PETRI_TRANSITIONS=110} [2024-12-02 07:19:06,465 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 86 predicate places. [2024-12-02 07:19:06,466 INFO L471 AbstractCegarLoop]: Abstraction has has 142 places, 110 transitions, 924 flow [2024-12-02 07:19:06,466 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:19:06,466 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:19:06,466 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:19:06,471 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-12-02 07:19:06,666 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-12-02 07:19:06,666 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-12-02 07:19:06,666 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:19:06,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1068756495, now seen corresponding path program 2 times [2024-12-02 07:19:06,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:19:06,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729906210] [2024-12-02 07:19:06,667 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 07:19:06,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:19:06,679 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 07:19:06,679 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:19:06,887 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-12-02 07:19:06,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:19:06,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729906210] [2024-12-02 07:19:06,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729906210] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:19:06,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511900645] [2024-12-02 07:19:06,888 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 07:19:06,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:19:06,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:19:06,889 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:19:06,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-12-02 07:19:06,993 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 07:19:06,993 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:19:06,994 INFO L256 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-12-02 07:19:06,995 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:19:07,151 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-12-02 07:19:07,151 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:19:07,280 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-12-02 07:19:07,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511900645] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:19:07,280 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:19:07,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2024-12-02 07:19:07,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232160984] [2024-12-02 07:19:07,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:19:07,281 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-12-02 07:19:07,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:19:07,282 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-12-02 07:19:07,282 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2024-12-02 07:19:07,394 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 55 [2024-12-02 07:19:07,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 110 transitions, 924 flow. Second operand has 24 states, 24 states have (on average 13.25) internal successors, (318), 24 states have internal predecessors, (318), 0 states have call successors, (0), 0 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 07:19:07,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:19:07,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 55 [2024-12-02 07:19:07,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:19:09,222 INFO L124 PetriNetUnfolderBase]: 10119/14724 cut-off events. [2024-12-02 07:19:09,223 INFO L125 PetriNetUnfolderBase]: For 74290/76010 co-relation queries the response was YES. [2024-12-02 07:19:09,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67810 conditions, 14724 events. 10119/14724 cut-off events. For 74290/76010 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 82886 event pairs, 4037 based on Foata normal form. 388/14965 useless extension candidates. Maximal degree in co-relation 56698. Up to 5311 conditions per place. [2024-12-02 07:19:09,311 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 199 selfloop transitions, 47 changer transitions 0/258 dead transitions. [2024-12-02 07:19:09,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 258 transitions, 2596 flow [2024-12-02 07:19:09,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-12-02 07:19:09,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-12-02 07:19:09,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 293 transitions. [2024-12-02 07:19:09,313 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35515151515151516 [2024-12-02 07:19:09,313 INFO L175 Difference]: Start difference. First operand has 142 places, 110 transitions, 924 flow. Second operand 15 states and 293 transitions. [2024-12-02 07:19:09,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 258 transitions, 2596 flow [2024-12-02 07:19:09,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 258 transitions, 2524 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-12-02 07:19:09,448 INFO L231 Difference]: Finished difference. Result has 159 places, 130 transitions, 1274 flow [2024-12-02 07:19:09,448 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=900, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1274, PETRI_PLACES=159, PETRI_TRANSITIONS=130} [2024-12-02 07:19:09,449 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 103 predicate places. [2024-12-02 07:19:09,449 INFO L471 AbstractCegarLoop]: Abstraction has has 159 places, 130 transitions, 1274 flow [2024-12-02 07:19:09,449 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 13.25) internal successors, (318), 24 states have internal predecessors, (318), 0 states have call successors, (0), 0 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 07:19:09,449 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:19:09,449 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:19:09,457 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-12-02 07:19:09,649 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-12-02 07:19:09,649 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-12-02 07:19:09,650 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:19:09,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1887905725, now seen corresponding path program 1 times [2024-12-02 07:19:09,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:19:09,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337964738] [2024-12-02 07:19:09,650 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:19:09,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:19:09,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:19:10,198 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 07:19:10,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:19:10,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337964738] [2024-12-02 07:19:10,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337964738] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:19:10,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87245270] [2024-12-02 07:19:10,198 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:19:10,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:19:10,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:19:10,200 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:19:10,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-12-02 07:19:10,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:19:10,290 INFO L256 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-12-02 07:19:10,292 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:19:10,296 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 07:19:10,337 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-12-02 07:19:10,370 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-12-02 07:19:10,371 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 07:19:10,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-12-02 07:19:10,656 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-12-02 07:19:10,662 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 07:19:10,662 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:19:23,178 INFO L349 Elim1Store]: treesize reduction 28, result has 64.6 percent of original size [2024-12-02 07:19:23,179 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 3054 treesize of output 2144 [2024-12-02 07:19:23,308 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:19:23,309 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 921 treesize of output 849 [2024-12-02 07:19:32,499 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-12-02 07:19:33,274 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-12-02 07:19:44,843 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-12-02 07:19:45,392 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-12-02 07:19:46,628 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-12-02 07:19:49,540 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-12-02 07:19:54,620 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-12-02 07:19:54,622 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-12-02 07:19:54,872 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-12-02 07:20:01,532 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-12-02 07:20:01,689 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-12-02 07:20:01,938 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-12-02 07:20:02,429 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-12-02 07:20:02,470 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-12-02 07:20:02,608 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-12-02 07:20:03,267 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 15 treesize of output 9 [2024-12-02 07:20:07,354 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 07:20:07,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87245270] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:20:07,354 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:20:07,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 27 [2024-12-02 07:20:07,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026214662] [2024-12-02 07:20:07,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:20:07,354 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-12-02 07:20:07,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:20:07,355 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-12-02 07:20:07,355 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=653, Unknown=3, NotChecked=0, Total=756 [2024-12-02 07:20:11,381 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 07:20:15,436 WARN L539 Checker$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 07:20:19,486 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 07:20:23,535 WARN L539 Checker$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 07:20:27,628 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 07:20:31,694 WARN L539 Checker$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 07:20:31,694 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 55 [2024-12-02 07:20:31,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 130 transitions, 1274 flow. Second operand has 28 states, 28 states have (on average 6.607142857142857) internal successors, (185), 28 states have internal predecessors, (185), 0 states have call successors, (0), 0 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 07:20:31,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:20:31,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 55 [2024-12-02 07:20:31,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:20:40,921 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 07:20:49,115 WARN L539 Checker$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 07:20:53,136 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 07:20:54,907 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 07:20:59,041 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 07:21:03,058 WARN L539 Checker$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 07:21:07,293 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.23s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 07:21:11,885 WARN L539 Checker$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 07:21:15,988 INFO L124 PetriNetUnfolderBase]: 17365/24397 cut-off events. [2024-12-02 07:21:15,988 INFO L125 PetriNetUnfolderBase]: For 137946/137946 co-relation queries the response was YES. [2024-12-02 07:21:16,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117318 conditions, 24397 events. 17365/24397 cut-off events. For 137946/137946 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 126524 event pairs, 8053 based on Foata normal form. 1/23476 useless extension candidates. Maximal degree in co-relation 98701. Up to 22611 conditions per place. [2024-12-02 07:21:16,113 INFO L140 encePairwiseOnDemand]: 41/55 looper letters, 141 selfloop transitions, 44 changer transitions 39/225 dead transitions. [2024-12-02 07:21:16,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 225 transitions, 2358 flow [2024-12-02 07:21:16,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-12-02 07:21:16,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-12-02 07:21:16,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 206 transitions. [2024-12-02 07:21:16,114 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.22032085561497325 [2024-12-02 07:21:16,114 INFO L175 Difference]: Start difference. First operand has 159 places, 130 transitions, 1274 flow. Second operand 17 states and 206 transitions. [2024-12-02 07:21:16,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 225 transitions, 2358 flow [2024-12-02 07:21:16,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 225 transitions, 2344 flow, removed 7 selfloop flow, removed 0 redundant places. [2024-12-02 07:21:16,339 INFO L231 Difference]: Finished difference. Result has 181 places, 136 transitions, 1424 flow [2024-12-02 07:21:16,339 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1264, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1424, PETRI_PLACES=181, PETRI_TRANSITIONS=136} [2024-12-02 07:21:16,340 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 125 predicate places. [2024-12-02 07:21:16,340 INFO L471 AbstractCegarLoop]: Abstraction has has 181 places, 136 transitions, 1424 flow [2024-12-02 07:21:16,340 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.607142857142857) internal successors, (185), 28 states have internal predecessors, (185), 0 states have call successors, (0), 0 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 07:21:16,340 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:21:16,340 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:21:16,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-12-02 07:21:16,540 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-12-02 07:21:16,541 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-12-02 07:21:16,541 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:21:16,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1898478259, now seen corresponding path program 2 times [2024-12-02 07:21:16,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:21:16,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724097072] [2024-12-02 07:21:16,541 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 07:21:16,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:21:16,560 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 07:21:16,560 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:21:17,523 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 07:21:17,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:21:17,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724097072] [2024-12-02 07:21:17,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724097072] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:21:17,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051395145] [2024-12-02 07:21:17,523 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 07:21:17,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:21:17,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:21:17,525 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:21:17,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-12-02 07:21:17,611 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 07:21:17,611 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:21:17,612 INFO L256 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-12-02 07:21:17,614 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:21:17,917 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-12-02 07:21:18,662 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:21:18,663 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 07:21:18,678 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 07:21:18,678 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:21:19,262 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:21:19,262 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 248 treesize of output 232 [2024-12-02 07:21:19,957 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:21:19,957 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 112 treesize of output 120 [2024-12-02 07:21:20,792 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 07:21:20,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051395145] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:21:20,793 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:21:20,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 29 [2024-12-02 07:21:20,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893808568] [2024-12-02 07:21:20,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:21:20,794 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-12-02 07:21:20,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:21:20,794 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-12-02 07:21:20,795 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=755, Unknown=0, NotChecked=0, Total=870 [2024-12-02 07:21:22,496 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 55 [2024-12-02 07:21:22,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 136 transitions, 1424 flow. Second operand has 30 states, 30 states have (on average 12.433333333333334) internal successors, (373), 30 states have internal predecessors, (373), 0 states have call successors, (0), 0 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 07:21:22,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:21:22,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 55 [2024-12-02 07:21:22,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:21:27,526 INFO L124 PetriNetUnfolderBase]: 8466/13191 cut-off events. [2024-12-02 07:21:27,526 INFO L125 PetriNetUnfolderBase]: For 85129/87062 co-relation queries the response was YES. [2024-12-02 07:21:27,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63188 conditions, 13191 events. 8466/13191 cut-off events. For 85129/87062 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 81601 event pairs, 4960 based on Foata normal form. 213/13265 useless extension candidates. Maximal degree in co-relation 63129. Up to 11058 conditions per place. [2024-12-02 07:21:27,592 INFO L140 encePairwiseOnDemand]: 38/55 looper letters, 136 selfloop transitions, 97 changer transitions 26/272 dead transitions. [2024-12-02 07:21:27,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 272 transitions, 3045 flow [2024-12-02 07:21:27,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-12-02 07:21:27,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-12-02 07:21:27,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 389 transitions. [2024-12-02 07:21:27,594 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.2946969696969697 [2024-12-02 07:21:27,594 INFO L175 Difference]: Start difference. First operand has 181 places, 136 transitions, 1424 flow. Second operand 24 states and 389 transitions. [2024-12-02 07:21:27,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 272 transitions, 3045 flow [2024-12-02 07:21:27,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 272 transitions, 2949 flow, removed 16 selfloop flow, removed 10 redundant places. [2024-12-02 07:21:27,790 INFO L231 Difference]: Finished difference. Result has 201 places, 185 transitions, 2156 flow [2024-12-02 07:21:27,791 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1365, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2156, PETRI_PLACES=201, PETRI_TRANSITIONS=185} [2024-12-02 07:21:27,791 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 145 predicate places. [2024-12-02 07:21:27,791 INFO L471 AbstractCegarLoop]: Abstraction has has 201 places, 185 transitions, 2156 flow [2024-12-02 07:21:27,792 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 12.433333333333334) internal successors, (373), 30 states have internal predecessors, (373), 0 states have call successors, (0), 0 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 07:21:27,792 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:21:27,792 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:21:27,797 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-12-02 07:21:27,992 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:21:27,992 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-12-02 07:21:27,993 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:21:27,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1185429869, now seen corresponding path program 3 times [2024-12-02 07:21:27,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:21:27,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830536329] [2024-12-02 07:21:27,993 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 07:21:27,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:21:28,013 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-12-02 07:21:28,013 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:21:28,948 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-12-02 07:21:28,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:21:28,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830536329] [2024-12-02 07:21:28,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830536329] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:21:28,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907006090] [2024-12-02 07:21:28,948 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 07:21:28,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:21:28,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:21:28,950 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:21:28,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-12-02 07:21:29,034 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-12-02 07:21:29,034 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:21:29,035 INFO L256 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-12-02 07:21:29,037 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:21:29,286 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-12-02 07:21:29,907 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:21:29,907 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 07:21:29,926 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 07:21:29,926 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:21:30,490 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:21:30,491 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 248 treesize of output 232 [2024-12-02 07:21:31,044 INFO L173 IndexEqualityManager]: detected equality via solver [2024-12-02 07:21:31,077 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:21:31,077 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 103 treesize of output 83 [2024-12-02 07:21:31,158 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:21:31,158 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 214 treesize of output 190 [2024-12-02 07:21:31,187 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:21:31,187 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 182 treesize of output 134 [2024-12-02 07:21:31,329 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:21:31,329 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 369 treesize of output 313 [2024-12-02 07:21:31,362 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:21:31,363 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 252 treesize of output 196 [2024-12-02 07:21:31,834 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 07:21:31,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907006090] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:21:31,834 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:21:31,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 27 [2024-12-02 07:21:31,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574398125] [2024-12-02 07:21:31,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:21:31,834 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-12-02 07:21:31,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:21:31,835 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-12-02 07:21:31,835 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2024-12-02 07:21:33,683 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 55 [2024-12-02 07:21:33,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 185 transitions, 2156 flow. Second operand has 28 states, 28 states have (on average 14.464285714285714) internal successors, (405), 28 states have internal predecessors, (405), 0 states have call successors, (0), 0 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 07:21:33,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:21:33,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 55 [2024-12-02 07:21:33,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:21:38,524 INFO L124 PetriNetUnfolderBase]: 8675/13458 cut-off events. [2024-12-02 07:21:38,524 INFO L125 PetriNetUnfolderBase]: For 105304/107030 co-relation queries the response was YES. [2024-12-02 07:21:38,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70593 conditions, 13458 events. 8675/13458 cut-off events. For 105304/107030 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 83554 event pairs, 3953 based on Foata normal form. 199/13497 useless extension candidates. Maximal degree in co-relation 69288. Up to 11302 conditions per place. [2024-12-02 07:21:38,604 INFO L140 encePairwiseOnDemand]: 38/55 looper letters, 172 selfloop transitions, 104 changer transitions 27/316 dead transitions. [2024-12-02 07:21:38,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 316 transitions, 3902 flow [2024-12-02 07:21:38,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-12-02 07:21:38,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-12-02 07:21:38,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 444 transitions. [2024-12-02 07:21:38,606 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.33636363636363636 [2024-12-02 07:21:38,606 INFO L175 Difference]: Start difference. First operand has 201 places, 185 transitions, 2156 flow. Second operand 24 states and 444 transitions. [2024-12-02 07:21:38,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 316 transitions, 3902 flow [2024-12-02 07:21:38,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 316 transitions, 3673 flow, removed 43 selfloop flow, removed 11 redundant places. [2024-12-02 07:21:38,843 INFO L231 Difference]: Finished difference. Result has 224 places, 220 transitions, 2712 flow [2024-12-02 07:21:38,843 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1971, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2712, PETRI_PLACES=224, PETRI_TRANSITIONS=220} [2024-12-02 07:21:38,844 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 168 predicate places. [2024-12-02 07:21:38,844 INFO L471 AbstractCegarLoop]: Abstraction has has 224 places, 220 transitions, 2712 flow [2024-12-02 07:21:38,844 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 14.464285714285714) internal successors, (405), 28 states have internal predecessors, (405), 0 states have call successors, (0), 0 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 07:21:38,844 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:21:38,844 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:21:38,853 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-12-02 07:21:39,045 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:21:39,045 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-12-02 07:21:39,045 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:21:39,046 INFO L85 PathProgramCache]: Analyzing trace with hash 407655071, now seen corresponding path program 4 times [2024-12-02 07:21:39,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:21:39,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406777312] [2024-12-02 07:21:39,046 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 07:21:39,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:21:39,071 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 07:21:39,071 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:21:40,201 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 07:21:40,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:21:40,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406777312] [2024-12-02 07:21:40,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406777312] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:21:40,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068528167] [2024-12-02 07:21:40,202 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 07:21:40,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:21:40,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:21:40,204 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:21:40,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-12-02 07:21:40,293 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 07:21:40,293 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:21:40,294 INFO L256 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-12-02 07:21:40,296 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:21:40,305 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 07:21:40,384 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-12-02 07:21:40,473 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-12-02 07:21:40,473 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 07:21:40,576 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-12-02 07:21:41,247 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-12-02 07:21:41,271 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 07:21:41,271 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:21:42,172 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 07:21:42,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068528167] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:21:42,172 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:21:42,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 27 [2024-12-02 07:21:42,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382502732] [2024-12-02 07:21:42,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:21:42,173 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-12-02 07:21:42,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:21:42,173 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-12-02 07:21:42,174 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2024-12-02 07:21:43,884 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 55 [2024-12-02 07:21:43,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 220 transitions, 2712 flow. Second operand has 28 states, 28 states have (on average 12.392857142857142) internal successors, (347), 28 states have internal predecessors, (347), 0 states have call successors, (0), 0 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 07:21:43,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:21:43,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 55 [2024-12-02 07:21:43,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:21:48,421 INFO L124 PetriNetUnfolderBase]: 8661/13400 cut-off events. [2024-12-02 07:21:48,421 INFO L125 PetriNetUnfolderBase]: For 117749/119531 co-relation queries the response was YES. [2024-12-02 07:21:48,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72973 conditions, 13400 events. 8661/13400 cut-off events. For 117749/119531 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 82101 event pairs, 4165 based on Foata normal form. 199/13436 useless extension candidates. Maximal degree in co-relation 72790. Up to 11546 conditions per place. [2024-12-02 07:21:48,503 INFO L140 encePairwiseOnDemand]: 40/55 looper letters, 142 selfloop transitions, 71 changer transitions 42/268 dead transitions. [2024-12-02 07:21:48,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 268 transitions, 3578 flow [2024-12-02 07:21:48,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-12-02 07:21:48,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-12-02 07:21:48,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 280 transitions. [2024-12-02 07:21:48,504 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.2994652406417112 [2024-12-02 07:21:48,504 INFO L175 Difference]: Start difference. First operand has 224 places, 220 transitions, 2712 flow. Second operand 17 states and 280 transitions. [2024-12-02 07:21:48,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 268 transitions, 3578 flow [2024-12-02 07:21:48,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 268 transitions, 3390 flow, removed 34 selfloop flow, removed 11 redundant places. [2024-12-02 07:21:48,720 INFO L231 Difference]: Finished difference. Result has 228 places, 209 transitions, 2565 flow [2024-12-02 07:21:48,720 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2538, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2565, PETRI_PLACES=228, PETRI_TRANSITIONS=209} [2024-12-02 07:21:48,721 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 172 predicate places. [2024-12-02 07:21:48,721 INFO L471 AbstractCegarLoop]: Abstraction has has 228 places, 209 transitions, 2565 flow [2024-12-02 07:21:48,721 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 12.392857142857142) internal successors, (347), 28 states have internal predecessors, (347), 0 states have call successors, (0), 0 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 07:21:48,721 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:21:48,721 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:21:48,730 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-12-02 07:21:48,921 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:21:48,922 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-12-02 07:21:48,922 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:21:48,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1747052227, now seen corresponding path program 5 times [2024-12-02 07:21:48,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:21:48,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255730527] [2024-12-02 07:21:48,922 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 07:21:48,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:21:48,937 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-12-02 07:21:48,937 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:21:50,386 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 07:21:50,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:21:50,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255730527] [2024-12-02 07:21:50,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255730527] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:21:50,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487912821] [2024-12-02 07:21:50,386 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 07:21:50,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:21:50,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:21:50,388 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:21:50,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-12-02 07:21:50,474 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-12-02 07:21:50,474 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:21:50,476 INFO L256 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-12-02 07:21:50,478 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:21:50,484 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 07:21:50,603 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-12-02 07:21:50,730 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-12-02 07:21:50,730 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 07:21:50,848 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-12-02 07:21:51,508 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-12-02 07:21:51,530 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 07:21:51,530 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:22:00,705 INFO L349 Elim1Store]: treesize reduction 28, result has 64.6 percent of original size [2024-12-02 07:22:00,706 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 1530 treesize of output 1100 [2024-12-02 07:22:00,761 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:22:00,761 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 694 treesize of output 642 [2024-12-02 07:22:07,754 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 07:22:07,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487912821] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:22:07,754 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:22:07,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 28 [2024-12-02 07:22:07,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463487400] [2024-12-02 07:22:07,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:22:07,755 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-12-02 07:22:07,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:22:07,755 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-12-02 07:22:07,755 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=717, Unknown=3, NotChecked=0, Total=812 [2024-12-02 07:22:12,051 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 07:22:16,708 WARN L539 Checker$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 07:22:20,888 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 07:22:25,527 WARN L539 Checker$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 07:22:30,047 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 07:22:34,591 WARN L539 Checker$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 07:22:34,592 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 55 [2024-12-02 07:22:34,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 209 transitions, 2565 flow. Second operand has 29 states, 29 states have (on average 6.586206896551724) internal successors, (191), 29 states have internal predecessors, (191), 0 states have call successors, (0), 0 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 07:22:34,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:22:34,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 55 [2024-12-02 07:22:34,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:22:52,999 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-02 07:22:57,021 WARN L539 Checker$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 07:23:02,384 INFO L124 PetriNetUnfolderBase]: 18444/26150 cut-off events. [2024-12-02 07:23:02,385 INFO L125 PetriNetUnfolderBase]: For 191211/191211 co-relation queries the response was YES. [2024-12-02 07:23:02,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138689 conditions, 26150 events. 18444/26150 cut-off events. For 191211/191211 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 140924 event pairs, 9027 based on Foata normal form. 1/25149 useless extension candidates. Maximal degree in co-relation 138590. Up to 24049 conditions per place. [2024-12-02 07:23:02,573 INFO L140 encePairwiseOnDemand]: 40/55 looper letters, 173 selfloop transitions, 65 changer transitions 46/285 dead transitions. [2024-12-02 07:23:02,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 285 transitions, 3736 flow [2024-12-02 07:23:02,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-12-02 07:23:02,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-12-02 07:23:02,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 193 transitions. [2024-12-02 07:23:02,574 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.20641711229946524 [2024-12-02 07:23:02,574 INFO L175 Difference]: Start difference. First operand has 228 places, 209 transitions, 2565 flow. Second operand 17 states and 193 transitions. [2024-12-02 07:23:02,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 285 transitions, 3736 flow [2024-12-02 07:23:03,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 285 transitions, 3454 flow, removed 20 selfloop flow, removed 23 redundant places. [2024-12-02 07:23:03,060 INFO L231 Difference]: Finished difference. Result has 221 places, 201 transitions, 2399 flow [2024-12-02 07:23:03,061 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2297, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2399, PETRI_PLACES=221, PETRI_TRANSITIONS=201} [2024-12-02 07:23:03,061 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 165 predicate places. [2024-12-02 07:23:03,061 INFO L471 AbstractCegarLoop]: Abstraction has has 221 places, 201 transitions, 2399 flow [2024-12-02 07:23:03,061 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 6.586206896551724) internal successors, (191), 29 states have internal predecessors, (191), 0 states have call successors, (0), 0 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 07:23:03,062 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:23:03,062 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:23:03,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-12-02 07:23:03,262 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-12-02 07:23:03,262 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-12-02 07:23:03,263 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:23:03,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1666904393, now seen corresponding path program 6 times [2024-12-02 07:23:03,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:23:03,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967807312] [2024-12-02 07:23:03,263 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 07:23:03,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:23:03,279 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-12-02 07:23:03,279 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:23:03,976 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-12-02 07:23:03,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:23:03,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967807312] [2024-12-02 07:23:03,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967807312] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:23:03,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:23:03,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-12-02 07:23:03,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714922315] [2024-12-02 07:23:03,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:23:03,976 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-12-02 07:23:03,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:23:03,977 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-12-02 07:23:03,977 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-12-02 07:23:04,173 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 55 [2024-12-02 07:23:04,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 201 transitions, 2399 flow. Second operand has 12 states, 12 states have (on average 14.25) internal successors, (171), 12 states have internal predecessors, (171), 0 states have call successors, (0), 0 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 07:23:04,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:23:04,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 55 [2024-12-02 07:23:04,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:23:07,665 INFO L124 PetriNetUnfolderBase]: 9363/14650 cut-off events. [2024-12-02 07:23:07,666 INFO L125 PetriNetUnfolderBase]: For 122325/124245 co-relation queries the response was YES. [2024-12-02 07:23:07,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79427 conditions, 14650 events. 9363/14650 cut-off events. For 122325/124245 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 93621 event pairs, 3303 based on Foata normal form. 235/14734 useless extension candidates. Maximal degree in co-relation 79372. Up to 11768 conditions per place. [2024-12-02 07:23:07,761 INFO L140 encePairwiseOnDemand]: 43/55 looper letters, 221 selfloop transitions, 105 changer transitions 14/353 dead transitions. [2024-12-02 07:23:07,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 353 transitions, 4380 flow [2024-12-02 07:23:07,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-12-02 07:23:07,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-12-02 07:23:07,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 349 transitions. [2024-12-02 07:23:07,763 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3525252525252525 [2024-12-02 07:23:07,763 INFO L175 Difference]: Start difference. First operand has 221 places, 201 transitions, 2399 flow. Second operand 18 states and 349 transitions. [2024-12-02 07:23:07,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 353 transitions, 4380 flow [2024-12-02 07:23:08,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 353 transitions, 4109 flow, removed 31 selfloop flow, removed 17 redundant places. [2024-12-02 07:23:08,164 INFO L231 Difference]: Finished difference. Result has 220 places, 246 transitions, 3030 flow [2024-12-02 07:23:08,164 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2194, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=3030, PETRI_PLACES=220, PETRI_TRANSITIONS=246} [2024-12-02 07:23:08,164 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 164 predicate places. [2024-12-02 07:23:08,164 INFO L471 AbstractCegarLoop]: Abstraction has has 220 places, 246 transitions, 3030 flow [2024-12-02 07:23:08,164 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 14.25) internal successors, (171), 12 states have internal predecessors, (171), 0 states have call successors, (0), 0 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 07:23:08,164 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:23:08,164 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:23:08,164 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-12-02 07:23:08,164 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-12-02 07:23:08,165 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:23:08,165 INFO L85 PathProgramCache]: Analyzing trace with hash 2032262389, now seen corresponding path program 7 times [2024-12-02 07:23:08,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:23:08,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628721877] [2024-12-02 07:23:08,165 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 07:23:08,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:23:08,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:23:09,393 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 07:23:09,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:23:09,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628721877] [2024-12-02 07:23:09,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628721877] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:23:09,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142391667] [2024-12-02 07:23:09,393 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 07:23:09,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:23:09,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:23:09,395 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:23:09,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-12-02 07:23:09,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:23:09,489 INFO L256 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-12-02 07:23:09,491 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:23:09,790 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-12-02 07:23:10,328 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:23:10,328 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 07:23:10,365 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 07:23:10,365 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:23:10,980 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:23:10,980 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 248 treesize of output 232 [2024-12-02 07:23:11,799 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:23:11,799 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 214 treesize of output 182 [2024-12-02 07:23:12,612 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 07:23:12,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142391667] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:23:12,612 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:23:12,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 28 [2024-12-02 07:23:12,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361478255] [2024-12-02 07:23:12,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:23:12,613 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-12-02 07:23:12,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:23:12,614 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-12-02 07:23:12,614 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=721, Unknown=0, NotChecked=0, Total=812 [2024-12-02 07:23:14,496 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 55 [2024-12-02 07:23:14,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 246 transitions, 3030 flow. Second operand has 29 states, 29 states have (on average 13.517241379310345) internal successors, (392), 29 states have internal predecessors, (392), 0 states have call successors, (0), 0 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 07:23:14,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:23:14,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 55 [2024-12-02 07:23:14,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:23:21,940 INFO L124 PetriNetUnfolderBase]: 13411/20007 cut-off events. [2024-12-02 07:23:21,941 INFO L125 PetriNetUnfolderBase]: For 202690/205812 co-relation queries the response was YES. [2024-12-02 07:23:22,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113553 conditions, 20007 events. 13411/20007 cut-off events. For 202690/205812 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 122614 event pairs, 5220 based on Foata normal form. 251/19423 useless extension candidates. Maximal degree in co-relation 113496. Up to 16255 conditions per place. [2024-12-02 07:23:22,117 INFO L140 encePairwiseOnDemand]: 39/55 looper letters, 248 selfloop transitions, 147 changer transitions 62/462 dead transitions. [2024-12-02 07:23:22,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 462 transitions, 6198 flow [2024-12-02 07:23:22,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-12-02 07:23:22,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-12-02 07:23:22,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 490 transitions. [2024-12-02 07:23:22,119 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3181818181818182 [2024-12-02 07:23:22,119 INFO L175 Difference]: Start difference. First operand has 220 places, 246 transitions, 3030 flow. Second operand 28 states and 490 transitions. [2024-12-02 07:23:22,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 462 transitions, 6198 flow [2024-12-02 07:23:22,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 462 transitions, 5837 flow, removed 124 selfloop flow, removed 6 redundant places. [2024-12-02 07:23:22,812 INFO L231 Difference]: Finished difference. Result has 247 places, 274 transitions, 3507 flow [2024-12-02 07:23:22,812 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2785, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=3507, PETRI_PLACES=247, PETRI_TRANSITIONS=274} [2024-12-02 07:23:22,812 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 191 predicate places. [2024-12-02 07:23:22,812 INFO L471 AbstractCegarLoop]: Abstraction has has 247 places, 274 transitions, 3507 flow [2024-12-02 07:23:22,812 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 13.517241379310345) internal successors, (392), 29 states have internal predecessors, (392), 0 states have call successors, (0), 0 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 07:23:22,812 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:23:22,812 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:23:22,818 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-12-02 07:23:23,013 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:23:23,013 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-12-02 07:23:23,013 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:23:23,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1061120397, now seen corresponding path program 3 times [2024-12-02 07:23:23,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:23:23,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667582319] [2024-12-02 07:23:23,013 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 07:23:23,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:23:23,024 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-12-02 07:23:23,024 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:23:23,293 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-12-02 07:23:23,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:23:23,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667582319] [2024-12-02 07:23:23,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667582319] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:23:23,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238490828] [2024-12-02 07:23:23,293 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 07:23:23,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:23:23,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:23:23,295 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:23:23,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-12-02 07:23:23,379 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-12-02 07:23:23,379 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:23:23,380 INFO L256 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-12-02 07:23:23,382 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:23:23,391 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 07:23:23,608 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-12-02 07:23:23,608 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 07:23:23,622 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-12-02 07:23:24,278 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 17 proven. 5 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-12-02 07:23:24,278 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:23:25,595 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 72 treesize of output 68 [2024-12-02 07:23:26,054 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-12-02 07:23:26,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238490828] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:23:26,054 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:23:26,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2024-12-02 07:23:26,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765876965] [2024-12-02 07:23:26,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:23:26,054 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-12-02 07:23:26,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:23:26,055 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-12-02 07:23:26,055 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2024-12-02 07:23:27,761 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 55 [2024-12-02 07:23:27,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 274 transitions, 3507 flow. Second operand has 23 states, 23 states have (on average 11.478260869565217) internal successors, (264), 23 states have internal predecessors, (264), 0 states have call successors, (0), 0 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 07:23:27,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:23:27,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 55 [2024-12-02 07:23:27,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:23:31,742 INFO L124 PetriNetUnfolderBase]: 12193/18292 cut-off events. [2024-12-02 07:23:31,743 INFO L125 PetriNetUnfolderBase]: For 188783/190951 co-relation queries the response was YES. [2024-12-02 07:23:31,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107485 conditions, 18292 events. 12193/18292 cut-off events. For 188783/190951 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 114625 event pairs, 2333 based on Foata normal form. 416/18571 useless extension candidates. Maximal degree in co-relation 107426. Up to 5936 conditions per place. [2024-12-02 07:23:31,952 INFO L140 encePairwiseOnDemand]: 47/55 looper letters, 372 selfloop transitions, 44 changer transitions 0/426 dead transitions. [2024-12-02 07:23:31,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 426 transitions, 6031 flow [2024-12-02 07:23:31,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-12-02 07:23:31,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-12-02 07:23:31,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-12-02 07:23:31,953 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3373737373737374 [2024-12-02 07:23:31,953 INFO L175 Difference]: Start difference. First operand has 247 places, 274 transitions, 3507 flow. Second operand 9 states and 167 transitions. [2024-12-02 07:23:31,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 426 transitions, 6031 flow [2024-12-02 07:23:33,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 426 transitions, 5259 flow, removed 169 selfloop flow, removed 24 redundant places. [2024-12-02 07:23:33,235 INFO L231 Difference]: Finished difference. Result has 202 places, 275 transitions, 3065 flow [2024-12-02 07:23:33,235 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2963, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3065, PETRI_PLACES=202, PETRI_TRANSITIONS=275} [2024-12-02 07:23:33,236 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 146 predicate places. [2024-12-02 07:23:33,236 INFO L471 AbstractCegarLoop]: Abstraction has has 202 places, 275 transitions, 3065 flow [2024-12-02 07:23:33,236 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 11.478260869565217) internal successors, (264), 23 states have internal predecessors, (264), 0 states have call successors, (0), 0 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 07:23:33,236 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:23:33,236 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:23:33,241 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-12-02 07:23:33,436 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:23:33,437 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-12-02 07:23:33,437 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:23:33,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1061120395, now seen corresponding path program 1 times [2024-12-02 07:23:33,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:23:33,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797494938] [2024-12-02 07:23:33,437 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:23:33,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:23:33,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:23:33,922 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-02 07:23:33,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:23:33,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797494938] [2024-12-02 07:23:33,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797494938] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:23:33,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811772928] [2024-12-02 07:23:33,922 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:23:33,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:23:33,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:23:33,924 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:23:33,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-12-02 07:23:34,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:23:34,030 INFO L256 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-12-02 07:23:34,031 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:23:34,585 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-12-02 07:23:34,586 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:23:34,996 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 07:23:35,311 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-12-02 07:23:35,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811772928] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:23:35,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:23:35,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 26 [2024-12-02 07:23:35,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345718747] [2024-12-02 07:23:35,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:23:35,312 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-12-02 07:23:35,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:23:35,312 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-12-02 07:23:35,312 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2024-12-02 07:23:36,298 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 55 [2024-12-02 07:23:36,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 275 transitions, 3065 flow. Second operand has 27 states, 27 states have (on average 13.444444444444445) internal successors, (363), 27 states have internal predecessors, (363), 0 states have call successors, (0), 0 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 07:23:36,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:23:36,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 55 [2024-12-02 07:23:36,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:23:45,919 INFO L124 PetriNetUnfolderBase]: 23285/34988 cut-off events. [2024-12-02 07:23:45,919 INFO L125 PetriNetUnfolderBase]: For 291422/293387 co-relation queries the response was YES. [2024-12-02 07:23:46,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 194038 conditions, 34988 events. 23285/34988 cut-off events. For 291422/293387 co-relation queries the response was YES. Maximal size of possible extension queue 1222. Compared 241948 event pairs, 4451 based on Foata normal form. 485/35451 useless extension candidates. Maximal degree in co-relation 193991. Up to 9226 conditions per place. [2024-12-02 07:23:46,214 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 925 selfloop transitions, 93 changer transitions 0/1028 dead transitions. [2024-12-02 07:23:46,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 1028 transitions, 12882 flow [2024-12-02 07:23:46,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-12-02 07:23:46,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-12-02 07:23:46,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 559 transitions. [2024-12-02 07:23:46,216 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.37643097643097645 [2024-12-02 07:23:46,216 INFO L175 Difference]: Start difference. First operand has 202 places, 275 transitions, 3065 flow. Second operand 27 states and 559 transitions. [2024-12-02 07:23:46,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 1028 transitions, 12882 flow [2024-12-02 07:23:48,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 1028 transitions, 12732 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-12-02 07:23:48,125 INFO L231 Difference]: Finished difference. Result has 225 places, 312 transitions, 3751 flow [2024-12-02 07:23:48,126 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2979, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=3751, PETRI_PLACES=225, PETRI_TRANSITIONS=312} [2024-12-02 07:23:48,126 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 169 predicate places. [2024-12-02 07:23:48,126 INFO L471 AbstractCegarLoop]: Abstraction has has 225 places, 312 transitions, 3751 flow [2024-12-02 07:23:48,126 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 13.444444444444445) internal successors, (363), 27 states have internal predecessors, (363), 0 states have call successors, (0), 0 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 07:23:48,126 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:23:48,127 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:23:48,135 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-12-02 07:23:48,327 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:23:48,327 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-12-02 07:23:48,327 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:23:48,328 INFO L85 PathProgramCache]: Analyzing trace with hash 848897785, now seen corresponding path program 8 times [2024-12-02 07:23:48,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:23:48,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266612344] [2024-12-02 07:23:48,328 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 07:23:48,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:23:48,340 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 07:23:48,340 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:23:48,455 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 07:23:48,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:23:48,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266612344] [2024-12-02 07:23:48,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266612344] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:23:48,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909654764] [2024-12-02 07:23:48,456 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 07:23:48,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:23:48,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:23:48,457 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:23:48,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-12-02 07:23:48,560 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 07:23:48,560 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:23:48,561 INFO L256 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 07:23:48,562 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:23:48,790 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 07:23:48,791 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:23:49,000 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 07:23:49,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909654764] provided 1 perfect and 1 imperfect interpolant sequences [2024-12-02 07:23:49,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-12-02 07:23:49,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13 [2024-12-02 07:23:49,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140757188] [2024-12-02 07:23:49,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:23:49,001 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-12-02 07:23:49,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:23:49,001 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-12-02 07:23:49,001 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-12-02 07:23:49,060 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 55 [2024-12-02 07:23:49,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 312 transitions, 3751 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:23:49,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:23:49,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 55 [2024-12-02 07:23:49,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:23:53,980 INFO L124 PetriNetUnfolderBase]: 23041/34602 cut-off events. [2024-12-02 07:23:53,980 INFO L125 PetriNetUnfolderBase]: For 314198/316420 co-relation queries the response was YES. [2024-12-02 07:23:54,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189536 conditions, 34602 events. 23041/34602 cut-off events. For 314198/316420 co-relation queries the response was YES. Maximal size of possible extension queue 1093. Compared 238701 event pairs, 4309 based on Foata normal form. 1240/35839 useless extension candidates. Maximal degree in co-relation 189486. Up to 13082 conditions per place. [2024-12-02 07:23:54,289 INFO L140 encePairwiseOnDemand]: 48/55 looper letters, 358 selfloop transitions, 45 changer transitions 0/415 dead transitions. [2024-12-02 07:23:54,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 415 transitions, 5665 flow [2024-12-02 07:23:54,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-12-02 07:23:54,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-12-02 07:23:54,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-12-02 07:23:54,290 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36623376623376624 [2024-12-02 07:23:54,290 INFO L175 Difference]: Start difference. First operand has 225 places, 312 transitions, 3751 flow. Second operand 7 states and 141 transitions. [2024-12-02 07:23:54,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 415 transitions, 5665 flow [2024-12-02 07:23:56,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 415 transitions, 5572 flow, removed 15 selfloop flow, removed 14 redundant places. [2024-12-02 07:23:56,226 INFO L231 Difference]: Finished difference. Result has 216 places, 305 transitions, 3672 flow [2024-12-02 07:23:56,226 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=3582, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3672, PETRI_PLACES=216, PETRI_TRANSITIONS=305} [2024-12-02 07:23:56,227 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 160 predicate places. [2024-12-02 07:23:56,227 INFO L471 AbstractCegarLoop]: Abstraction has has 216 places, 305 transitions, 3672 flow [2024-12-02 07:23:56,227 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:23:56,227 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:23:56,227 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:23:56,232 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-12-02 07:23:56,427 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-12-02 07:23:56,428 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-12-02 07:23:56,428 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:23:56,428 INFO L85 PathProgramCache]: Analyzing trace with hash 172001111, now seen corresponding path program 9 times [2024-12-02 07:23:56,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:23:56,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314579034] [2024-12-02 07:23:56,428 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 07:23:56,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:23:56,444 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-12-02 07:23:56,444 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:23:56,641 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-12-02 07:23:56,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:23:56,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314579034] [2024-12-02 07:23:56,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314579034] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:23:56,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424721090] [2024-12-02 07:23:56,641 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 07:23:56,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:23:56,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:23:56,643 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:23:56,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-12-02 07:23:56,745 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-12-02 07:23:56,746 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:23:56,747 INFO L256 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 07:23:56,748 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:23:57,037 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-12-02 07:23:57,037 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:23:57,249 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-12-02 07:23:57,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424721090] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:23:57,249 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:23:57,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 19 [2024-12-02 07:23:57,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177876367] [2024-12-02 07:23:57,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:23:57,250 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-12-02 07:23:57,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:23:57,250 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-12-02 07:23:57,250 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2024-12-02 07:23:57,344 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 55 [2024-12-02 07:23:57,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 305 transitions, 3672 flow. Second operand has 19 states, 19 states have (on average 11.894736842105264) internal successors, (226), 19 states have internal predecessors, (226), 0 states have call successors, (0), 0 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 07:23:57,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:23:57,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 55 [2024-12-02 07:23:57,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:24:11,102 INFO L124 PetriNetUnfolderBase]: 53922/77344 cut-off events. [2024-12-02 07:24:11,102 INFO L125 PetriNetUnfolderBase]: For 633019/633019 co-relation queries the response was YES. [2024-12-02 07:24:11,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 413764 conditions, 77344 events. 53922/77344 cut-off events. For 633019/633019 co-relation queries the response was YES. Maximal size of possible extension queue 1947. Compared 514568 event pairs, 2941 based on Foata normal form. 0/74264 useless extension candidates. Maximal degree in co-relation 413716. Up to 18731 conditions per place. [2024-12-02 07:24:11,724 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 713 selfloop transitions, 474 changer transitions 0/1188 dead transitions. [2024-12-02 07:24:11,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 1188 transitions, 15119 flow [2024-12-02 07:24:11,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-12-02 07:24:11,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-12-02 07:24:11,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 605 transitions. [2024-12-02 07:24:11,727 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3235294117647059 [2024-12-02 07:24:11,727 INFO L175 Difference]: Start difference. First operand has 216 places, 305 transitions, 3672 flow. Second operand 34 states and 605 transitions. [2024-12-02 07:24:11,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 1188 transitions, 15119 flow [2024-12-02 07:24:19,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 1188 transitions, 14791 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-12-02 07:24:19,585 INFO L231 Difference]: Finished difference. Result has 266 places, 720 transitions, 9793 flow [2024-12-02 07:24:19,586 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=3582, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=9793, PETRI_PLACES=266, PETRI_TRANSITIONS=720} [2024-12-02 07:24:19,586 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 210 predicate places. [2024-12-02 07:24:19,586 INFO L471 AbstractCegarLoop]: Abstraction has has 266 places, 720 transitions, 9793 flow [2024-12-02 07:24:19,586 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 11.894736842105264) internal successors, (226), 19 states have internal predecessors, (226), 0 states have call successors, (0), 0 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 07:24:19,586 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:24:19,586 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:24:19,592 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-12-02 07:24:19,787 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-12-02 07:24:19,787 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-12-02 07:24:19,788 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:24:19,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1021011937, now seen corresponding path program 10 times [2024-12-02 07:24:19,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:24:19,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251386941] [2024-12-02 07:24:19,788 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 07:24:19,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:24:19,796 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 07:24:19,796 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:24:19,955 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-12-02 07:24:19,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:24:19,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251386941] [2024-12-02 07:24:19,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251386941] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:24:19,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541551904] [2024-12-02 07:24:19,955 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 07:24:19,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:24:19,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:24:19,957 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:24:19,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-12-02 07:24:20,056 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 07:24:20,057 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:24:20,057 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 07:24:20,059 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:24:20,405 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-12-02 07:24:20,405 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:24:20,720 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-12-02 07:24:20,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541551904] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:24:20,720 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:24:20,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2024-12-02 07:24:20,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787105256] [2024-12-02 07:24:20,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:24:20,720 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-12-02 07:24:20,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:24:20,721 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-12-02 07:24:20,721 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2024-12-02 07:24:20,818 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 55 [2024-12-02 07:24:20,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 720 transitions, 9793 flow. Second operand has 19 states, 19 states have (on average 11.736842105263158) internal successors, (223), 19 states have internal predecessors, (223), 0 states have call successors, (0), 0 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 07:24:20,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:24:20,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 55 [2024-12-02 07:24:20,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:25:11,297 INFO L124 PetriNetUnfolderBase]: 153351/215687 cut-off events. [2024-12-02 07:25:11,298 INFO L125 PetriNetUnfolderBase]: For 3267311/3267311 co-relation queries the response was YES. [2024-12-02 07:25:12,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1458535 conditions, 215687 events. 153351/215687 cut-off events. For 3267311/3267311 co-relation queries the response was YES. Maximal size of possible extension queue 4871. Compared 1532411 event pairs, 5850 based on Foata normal form. 250/215545 useless extension candidates. Maximal degree in co-relation 1458464. Up to 62232 conditions per place. [2024-12-02 07:25:14,110 INFO L140 encePairwiseOnDemand]: 42/55 looper letters, 1982 selfloop transitions, 1884 changer transitions 0/3867 dead transitions. [2024-12-02 07:25:14,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 3867 transitions, 60641 flow [2024-12-02 07:25:14,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2024-12-02 07:25:14,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2024-12-02 07:25:14,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 1353 transitions. [2024-12-02 07:25:14,114 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.328 [2024-12-02 07:25:14,114 INFO L175 Difference]: Start difference. First operand has 266 places, 720 transitions, 9793 flow. Second operand 75 states and 1353 transitions. [2024-12-02 07:25:14,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 3867 transitions, 60641 flow [2024-12-02 07:31:31,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 3867 transitions, 59443 flow, removed 599 selfloop flow, removed 0 redundant places. [2024-12-02 07:31:31,664 INFO L231 Difference]: Finished difference. Result has 387 places, 2608 transitions, 43717 flow [2024-12-02 07:31:31,664 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=9519, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=720, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=365, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=43717, PETRI_PLACES=387, PETRI_TRANSITIONS=2608} [2024-12-02 07:31:31,666 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 331 predicate places. [2024-12-02 07:31:31,666 INFO L471 AbstractCegarLoop]: Abstraction has has 387 places, 2608 transitions, 43717 flow [2024-12-02 07:31:31,667 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 11.736842105263158) internal successors, (223), 19 states have internal predecessors, (223), 0 states have call successors, (0), 0 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 07:31:31,667 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:31:31,667 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:31:31,677 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-12-02 07:31:31,868 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-12-02 07:31:31,868 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-12-02 07:31:31,869 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:31:31,870 INFO L85 PathProgramCache]: Analyzing trace with hash 361177369, now seen corresponding path program 11 times [2024-12-02 07:31:31,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:31:31,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779788554] [2024-12-02 07:31:31,870 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 07:31:31,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:31:32,001 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-12-02 07:31:32,001 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:31:32,592 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-12-02 07:31:32,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:31:32,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779788554] [2024-12-02 07:31:32,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779788554] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:31:32,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435055179] [2024-12-02 07:31:32,593 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 07:31:32,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:31:32,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:31:32,596 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:31:32,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e3fe71e-f93e-4d3c-9648-e4af650b0d3e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-12-02 07:31:32,761 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-12-02 07:31:32,761 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:31:32,762 INFO L256 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-12-02 07:31:32,765 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:31:33,262 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-12-02 07:31:33,262 INFO L312 TraceCheckSpWp]: Computing backward predicates...