./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-chromosome-trans.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_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/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_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/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_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/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 f36f5593156fc25b34b4c706b0d898a2d66ee8bab5f6d91cd69ff9cf3c129193 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-12-01 13:19:03,292 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-12-01 13:19:03,346 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-12-01 13:19:03,351 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-12-01 13:19:03,351 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-12-01 13:19:03,370 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-12-01 13:19:03,371 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-12-01 13:19:03,371 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-12-01 13:19:03,371 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-12-01 13:19:03,371 INFO L153 SettingsManager]: * Use memory slicer=true [2024-12-01 13:19:03,372 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-12-01 13:19:03,372 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-12-01 13:19:03,372 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-12-01 13:19:03,372 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-12-01 13:19:03,372 INFO L153 SettingsManager]: * Use SBE=true [2024-12-01 13:19:03,372 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-12-01 13:19:03,373 INFO L153 SettingsManager]: * sizeof long=4 [2024-12-01 13:19:03,373 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-12-01 13:19:03,373 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-12-01 13:19:03,373 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-12-01 13:19:03,373 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-12-01 13:19:03,373 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-12-01 13:19:03,373 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-12-01 13:19:03,373 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-12-01 13:19:03,373 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-12-01 13:19:03,373 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-12-01 13:19:03,374 INFO L153 SettingsManager]: * sizeof long double=12 [2024-12-01 13:19:03,374 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-12-01 13:19:03,374 INFO L153 SettingsManager]: * Use constant arrays=true [2024-12-01 13:19:03,374 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-12-01 13:19:03,374 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-01 13:19:03,374 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-01 13:19:03,374 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-01 13:19:03,374 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-01 13:19:03,374 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-12-01 13:19:03,374 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-01 13:19:03,374 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-01 13:19:03,374 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-01 13:19:03,375 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-01 13:19:03,375 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-12-01 13:19:03,375 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-12-01 13:19:03,375 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-12-01 13:19:03,375 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-12-01 13:19:03,375 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-12-01 13:19:03,376 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-12-01 13:19:03,376 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-12-01 13:19:03,376 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-12-01 13:19:03,376 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_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/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 -> f36f5593156fc25b34b4c706b0d898a2d66ee8bab5f6d91cd69ff9cf3c129193 [2024-12-01 13:19:03,588 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-12-01 13:19:03,596 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-12-01 13:19:03,598 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-12-01 13:19:03,600 INFO L270 PluginConnector]: Initializing CDTParser... [2024-12-01 13:19:03,600 INFO L274 PluginConnector]: CDTParser initialized [2024-12-01 13:19:03,601 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/../../sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c [2024-12-01 13:19:06,423 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/data/5457baaa3/d2e3127bb0a44072afdeb9d2c0adb19d/FLAGb519c5fea [2024-12-01 13:19:06,614 INFO L384 CDTParser]: Found 1 translation units. [2024-12-01 13:19:06,615 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c [2024-12-01 13:19:06,621 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/data/5457baaa3/d2e3127bb0a44072afdeb9d2c0adb19d/FLAGb519c5fea [2024-12-01 13:19:06,634 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/data/5457baaa3/d2e3127bb0a44072afdeb9d2c0adb19d [2024-12-01 13:19:06,636 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-12-01 13:19:06,637 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-12-01 13:19:06,638 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-12-01 13:19:06,638 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-12-01 13:19:06,641 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-12-01 13:19:06,641 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 01:19:06" (1/1) ... [2024-12-01 13:19:06,642 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@988a126 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 01:19:06, skipping insertion in model container [2024-12-01 13:19:06,642 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 01:19:06" (1/1) ... [2024-12-01 13:19:06,655 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-12-01 13:19:06,803 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-12-01 13:19:06,807 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-01 13:19:06,816 INFO L200 MainTranslator]: Completed pre-run [2024-12-01 13:19:06,845 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-01 13:19:06,861 INFO L204 MainTranslator]: Completed translation [2024-12-01 13:19:06,862 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 01:19:06 WrapperNode [2024-12-01 13:19:06,862 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-12-01 13:19:06,862 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-12-01 13:19:06,863 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-12-01 13:19:06,863 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-12-01 13:19:06,868 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 01:19:06" (1/1) ... [2024-12-01 13:19:06,876 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 01:19:06" (1/1) ... [2024-12-01 13:19:06,906 INFO L138 Inliner]: procedures = 25, calls = 32, calls flagged for inlining = 17, calls inlined = 25, statements flattened = 263 [2024-12-01 13:19:06,907 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-12-01 13:19:06,907 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-12-01 13:19:06,907 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-12-01 13:19:06,907 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-12-01 13:19:06,914 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 01:19:06" (1/1) ... [2024-12-01 13:19:06,915 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 01:19:06" (1/1) ... [2024-12-01 13:19:06,919 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 01:19:06" (1/1) ... [2024-12-01 13:19:06,938 INFO L175 MemorySlicer]: Split 11 memory accesses to 2 slices as follows [2, 9]. 82 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-12-01 13:19:06,938 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 01:19:06" (1/1) ... [2024-12-01 13:19:06,938 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 01:19:06" (1/1) ... [2024-12-01 13:19:06,949 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 01:19:06" (1/1) ... [2024-12-01 13:19:06,950 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 01:19:06" (1/1) ... [2024-12-01 13:19:06,955 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 01:19:06" (1/1) ... [2024-12-01 13:19:06,957 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 01:19:06" (1/1) ... [2024-12-01 13:19:06,959 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 01:19:06" (1/1) ... [2024-12-01 13:19:06,962 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-12-01 13:19:06,963 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-12-01 13:19:06,963 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-12-01 13:19:06,963 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-12-01 13:19:06,964 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 01:19:06" (1/1) ... [2024-12-01 13:19:06,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-01 13:19:06,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-01 13:19:06,991 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-12-01 13:19:06,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-12-01 13:19:07,016 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-12-01 13:19:07,016 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-12-01 13:19:07,017 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-12-01 13:19:07,017 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-12-01 13:19:07,017 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-12-01 13:19:07,017 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-12-01 13:19:07,017 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-12-01 13:19:07,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-12-01 13:19:07,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-12-01 13:19:07,018 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-12-01 13:19:07,018 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-12-01 13:19:07,018 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-12-01 13:19:07,018 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-12-01 13:19:07,018 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-12-01 13:19:07,018 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-12-01 13:19:07,018 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-12-01 13:19:07,020 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-12-01 13:19:07,125 INFO L234 CfgBuilder]: Building ICFG [2024-12-01 13:19:07,127 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-12-01 13:19:07,613 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-12-01 13:19:07,613 INFO L283 CfgBuilder]: Performing block encoding [2024-12-01 13:19:07,981 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-12-01 13:19:07,981 INFO L312 CfgBuilder]: Removed 6 assume(true) statements. [2024-12-01 13:19:07,981 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 01:19:07 BoogieIcfgContainer [2024-12-01 13:19:07,981 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-12-01 13:19:07,984 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-12-01 13:19:07,984 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-12-01 13:19:07,989 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-12-01 13:19:07,989 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.12 01:19:06" (1/3) ... [2024-12-01 13:19:07,989 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b0fa3a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 01:19:07, skipping insertion in model container [2024-12-01 13:19:07,989 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 01:19:06" (2/3) ... [2024-12-01 13:19:07,990 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b0fa3a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 01:19:07, skipping insertion in model container [2024-12-01 13:19:07,990 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 01:19:07" (3/3) ... [2024-12-01 13:19:07,991 INFO L128 eAbstractionObserver]: Analyzing ICFG chl-chromosome-trans.wvr.c [2024-12-01 13:19:08,007 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-12-01 13:19:08,009 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG chl-chromosome-trans.wvr.c that has 4 procedures, 55 locations, 1 initial locations, 6 loop locations, and 20 error locations. [2024-12-01 13:19:08,009 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-12-01 13:19:08,121 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-12-01 13:19:08,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 64 places, 60 transitions, 141 flow [2024-12-01 13:19:08,198 INFO L124 PetriNetUnfolderBase]: 6/57 cut-off events. [2024-12-01 13:19:08,200 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-12-01 13:19:08,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70 conditions, 57 events. 6/57 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 152 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 42. Up to 2 conditions per place. [2024-12-01 13:19:08,204 INFO L82 GeneralOperation]: Start removeDead. Operand has 64 places, 60 transitions, 141 flow [2024-12-01 13:19:08,208 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 60 places, 56 transitions, 130 flow [2024-12-01 13:19:08,217 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-12-01 13:19:08,231 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;@e4108dd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-12-01 13:19:08,231 INFO L334 AbstractCegarLoop]: Starting to check reachability of 35 error locations. [2024-12-01 13:19:08,235 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-12-01 13:19:08,236 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-12-01 13:19:08,236 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-12-01 13:19:08,236 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-01 13:19:08,237 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-12-01 13:19:08,237 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-12-01 13:19:08,242 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-01 13:19:08,243 INFO L85 PathProgramCache]: Analyzing trace with hash 861723, now seen corresponding path program 1 times [2024-12-01 13:19:08,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-01 13:19:08,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52941885] [2024-12-01 13:19:08,252 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-01 13:19:08,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-01 13:19:08,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-01 13:19:08,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-01 13:19:08,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-01 13:19:08,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52941885] [2024-12-01 13:19:08,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52941885] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-01 13:19:08,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-01 13:19:08,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-12-01 13:19:08,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363179019] [2024-12-01 13:19:08,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-01 13:19:08,475 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-01 13:19:08,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-01 13:19:08,502 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-01 13:19:08,503 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-01 13:19:08,544 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-12-01 13:19:08,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 56 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-01 13:19:08,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-01 13:19:08,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-12-01 13:19:08,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-01 13:19:08,731 INFO L124 PetriNetUnfolderBase]: 202/443 cut-off events. [2024-12-01 13:19:08,731 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2024-12-01 13:19:08,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 788 conditions, 443 events. 202/443 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2077 event pairs, 124 based on Foata normal form. 1/360 useless extension candidates. Maximal degree in co-relation 672. Up to 293 conditions per place. [2024-12-01 13:19:08,737 INFO L140 encePairwiseOnDemand]: 54/60 looper letters, 27 selfloop transitions, 2 changer transitions 0/51 dead transitions. [2024-12-01 13:19:08,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 51 transitions, 178 flow [2024-12-01 13:19:08,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-01 13:19:08,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-01 13:19:08,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 111 transitions. [2024-12-01 13:19:08,751 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-12-01 13:19:08,753 INFO L175 Difference]: Start difference. First operand has 60 places, 56 transitions, 130 flow. Second operand 3 states and 111 transitions. [2024-12-01 13:19:08,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 51 transitions, 178 flow [2024-12-01 13:19:08,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 51 transitions, 166 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-12-01 13:19:08,774 INFO L231 Difference]: Finished difference. Result has 51 places, 51 transitions, 112 flow [2024-12-01 13:19:08,777 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=51, PETRI_TRANSITIONS=51} [2024-12-01 13:19:08,781 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, -9 predicate places. [2024-12-01 13:19:08,781 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 51 transitions, 112 flow [2024-12-01 13:19:08,781 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-01 13:19:08,781 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-01 13:19:08,781 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-12-01 13:19:08,782 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-12-01 13:19:08,782 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-12-01 13:19:08,782 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-01 13:19:08,782 INFO L85 PathProgramCache]: Analyzing trace with hash 861724, now seen corresponding path program 1 times [2024-12-01 13:19:08,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-01 13:19:08,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815142833] [2024-12-01 13:19:08,783 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-01 13:19:08,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-01 13:19:08,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-01 13:19:08,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-01 13:19:08,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-01 13:19:09,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815142833] [2024-12-01 13:19:09,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815142833] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-01 13:19:09,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-01 13:19:09,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-01 13:19:09,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107738533] [2024-12-01 13:19:09,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-01 13:19:09,001 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-01 13:19:09,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-01 13:19:09,002 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-01 13:19:09,002 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-12-01 13:19:09,065 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-12-01 13:19:09,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 51 transitions, 112 flow. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 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) [2024-12-01 13:19:09,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-01 13:19:09,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-12-01 13:19:09,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-01 13:19:09,278 INFO L124 PetriNetUnfolderBase]: 202/449 cut-off events. [2024-12-01 13:19:09,278 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-12-01 13:19:09,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 777 conditions, 449 events. 202/449 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2081 event pairs, 124 based on Foata normal form. 1/364 useless extension candidates. Maximal degree in co-relation 734. Up to 305 conditions per place. [2024-12-01 13:19:09,283 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 32 selfloop transitions, 6 changer transitions 0/57 dead transitions. [2024-12-01 13:19:09,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 57 transitions, 200 flow [2024-12-01 13:19:09,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-01 13:19:09,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-01 13:19:09,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 122 transitions. [2024-12-01 13:19:09,285 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6777777777777778 [2024-12-01 13:19:09,285 INFO L175 Difference]: Start difference. First operand has 51 places, 51 transitions, 112 flow. Second operand 3 states and 122 transitions. [2024-12-01 13:19:09,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 57 transitions, 200 flow [2024-12-01 13:19:09,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 57 transitions, 196 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-12-01 13:19:09,288 INFO L231 Difference]: Finished difference. Result has 52 places, 54 transitions, 146 flow [2024-12-01 13:19:09,288 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=52, PETRI_TRANSITIONS=54} [2024-12-01 13:19:09,289 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, -8 predicate places. [2024-12-01 13:19:09,289 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 54 transitions, 146 flow [2024-12-01 13:19:09,289 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 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) [2024-12-01 13:19:09,289 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-01 13:19:09,290 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-12-01 13:19:09,290 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-12-01 13:19:09,290 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-12-01 13:19:09,290 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-01 13:19:09,290 INFO L85 PathProgramCache]: Analyzing trace with hash 828145301, now seen corresponding path program 1 times [2024-12-01 13:19:09,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-01 13:19:09,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491941723] [2024-12-01 13:19:09,291 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-01 13:19:09,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-01 13:19:09,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-01 13:19:09,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-01 13:19:09,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-01 13:19:09,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491941723] [2024-12-01 13:19:09,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491941723] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-01 13:19:09,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538572355] [2024-12-01 13:19:09,563 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-01 13:19:09,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 13:19:09,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-01 13:19:09,565 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-01 13:19:09,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-12-01 13:19:09,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-01 13:19:09,654 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-12-01 13:19:09,658 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-01 13:19:09,706 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 [2024-12-01 13:19:09,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-01 13:19:09,769 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-01 13:19:09,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-01 13:19:09,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538572355] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-01 13:19:09,857 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-01 13:19:09,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2024-12-01 13:19:09,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404875809] [2024-12-01 13:19:09,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-01 13:19:09,858 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-12-01 13:19:09,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-01 13:19:09,858 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-12-01 13:19:09,859 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-12-01 13:19:10,117 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-12-01 13:19:10,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 54 transitions, 146 flow. Second operand has 9 states, 9 states have (on average 27.666666666666668) internal successors, (249), 9 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-01 13:19:10,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-01 13:19:10,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-12-01 13:19:10,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-01 13:19:10,500 INFO L124 PetriNetUnfolderBase]: 208/473 cut-off events. [2024-12-01 13:19:10,500 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-12-01 13:19:10,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 855 conditions, 473 events. 208/473 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2130 event pairs, 124 based on Foata normal form. 3/392 useless extension candidates. Maximal degree in co-relation 766. Up to 307 conditions per place. [2024-12-01 13:19:10,504 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 41 selfloop transitions, 21 changer transitions 0/81 dead transitions. [2024-12-01 13:19:10,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 81 transitions, 358 flow [2024-12-01 13:19:10,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-01 13:19:10,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-12-01 13:19:10,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 230 transitions. [2024-12-01 13:19:10,507 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6388888888888888 [2024-12-01 13:19:10,507 INFO L175 Difference]: Start difference. First operand has 52 places, 54 transitions, 146 flow. Second operand 6 states and 230 transitions. [2024-12-01 13:19:10,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 81 transitions, 358 flow [2024-12-01 13:19:10,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 81 transitions, 348 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-12-01 13:19:10,510 INFO L231 Difference]: Finished difference. Result has 59 places, 69 transitions, 292 flow [2024-12-01 13:19:10,510 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=292, PETRI_PLACES=59, PETRI_TRANSITIONS=69} [2024-12-01 13:19:10,511 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, -1 predicate places. [2024-12-01 13:19:10,511 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 69 transitions, 292 flow [2024-12-01 13:19:10,511 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 27.666666666666668) internal successors, (249), 9 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-01 13:19:10,511 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-01 13:19:10,512 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-12-01 13:19:10,521 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-12-01 13:19:10,712 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 13:19:10,712 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-12-01 13:19:10,713 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-01 13:19:10,713 INFO L85 PathProgramCache]: Analyzing trace with hash -66884992, now seen corresponding path program 2 times [2024-12-01 13:19:10,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-01 13:19:10,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303127630] [2024-12-01 13:19:10,713 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-01 13:19:10,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-01 13:19:10,740 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-01 13:19:10,740 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-01 13:19:11,049 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-01 13:19:11,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-01 13:19:11,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303127630] [2024-12-01 13:19:11,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303127630] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-01 13:19:11,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846438030] [2024-12-01 13:19:11,050 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-01 13:19:11,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 13:19:11,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-01 13:19:11,052 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-01 13:19:11,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-12-01 13:19:11,135 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-01 13:19:11,135 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-01 13:19:11,136 INFO L256 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-12-01 13:19:11,138 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-01 13:19:11,145 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 [2024-12-01 13:19:11,300 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-01 13:19:11,300 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-01 13:19:11,446 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-01 13:19:11,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846438030] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-01 13:19:11,447 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-01 13:19:11,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2024-12-01 13:19:11,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515680277] [2024-12-01 13:19:11,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-01 13:19:11,447 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-12-01 13:19:11,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-01 13:19:11,448 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-12-01 13:19:11,448 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2024-12-01 13:19:12,128 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-12-01 13:19:12,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 69 transitions, 292 flow. Second operand has 18 states, 18 states have (on average 27.833333333333332) internal successors, (501), 18 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-01 13:19:12,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-01 13:19:12,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-12-01 13:19:12,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-01 13:19:12,694 INFO L124 PetriNetUnfolderBase]: 211/479 cut-off events. [2024-12-01 13:19:12,694 INFO L125 PetriNetUnfolderBase]: For 78/78 co-relation queries the response was YES. [2024-12-01 13:19:12,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 916 conditions, 479 events. 211/479 cut-off events. For 78/78 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2160 event pairs, 124 based on Foata normal form. 6/404 useless extension candidates. Maximal degree in co-relation 798. Up to 296 conditions per place. [2024-12-01 13:19:12,698 INFO L140 encePairwiseOnDemand]: 47/60 looper letters, 34 selfloop transitions, 34 changer transitions 0/87 dead transitions. [2024-12-01 13:19:12,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 87 transitions, 464 flow [2024-12-01 13:19:12,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-12-01 13:19:12,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-12-01 13:19:12,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 308 transitions. [2024-12-01 13:19:12,700 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5703703703703704 [2024-12-01 13:19:12,700 INFO L175 Difference]: Start difference. First operand has 59 places, 69 transitions, 292 flow. Second operand 9 states and 308 transitions. [2024-12-01 13:19:12,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 87 transitions, 464 flow [2024-12-01 13:19:12,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 87 transitions, 378 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-12-01 13:19:12,703 INFO L231 Difference]: Finished difference. Result has 60 places, 75 transitions, 304 flow [2024-12-01 13:19:12,704 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=304, PETRI_PLACES=60, PETRI_TRANSITIONS=75} [2024-12-01 13:19:12,704 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 0 predicate places. [2024-12-01 13:19:12,704 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 75 transitions, 304 flow [2024-12-01 13:19:12,705 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 27.833333333333332) internal successors, (501), 18 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-01 13:19:12,705 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-01 13:19:12,705 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-01 13:19:12,714 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-12-01 13:19:12,905 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 13:19:12,906 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-12-01 13:19:12,906 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-01 13:19:12,906 INFO L85 PathProgramCache]: Analyzing trace with hash 528296451, now seen corresponding path program 1 times [2024-12-01 13:19:12,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-01 13:19:12,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152315946] [2024-12-01 13:19:12,907 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-01 13:19:12,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-01 13:19:12,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-01 13:19:13,050 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-12-01 13:19:13,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-01 13:19:13,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152315946] [2024-12-01 13:19:13,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152315946] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-01 13:19:13,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84584825] [2024-12-01 13:19:13,051 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-01 13:19:13,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 13:19:13,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-01 13:19:13,053 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-01 13:19:13,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-12-01 13:19:13,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-01 13:19:13,156 INFO L256 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-12-01 13:19:13,157 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-01 13:19:13,206 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-12-01 13:19:13,206 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-01 13:19:13,236 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-12-01 13:19:13,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84584825] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-01 13:19:13,236 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-01 13:19:13,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2024-12-01 13:19:13,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688248243] [2024-12-01 13:19:13,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-01 13:19:13,237 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-12-01 13:19:13,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-01 13:19:13,237 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-12-01 13:19:13,237 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=46, Unknown=0, NotChecked=0, Total=90 [2024-12-01 13:19:13,264 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 60 [2024-12-01 13:19:13,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 75 transitions, 304 flow. Second operand has 10 states, 10 states have (on average 31.6) internal successors, (316), 10 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-01 13:19:13,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-01 13:19:13,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 60 [2024-12-01 13:19:13,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-01 13:19:13,450 INFO L124 PetriNetUnfolderBase]: 202/470 cut-off events. [2024-12-01 13:19:13,450 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2024-12-01 13:19:13,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 887 conditions, 470 events. 202/470 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2074 event pairs, 124 based on Foata normal form. 9/398 useless extension candidates. Maximal degree in co-relation 734. Up to 299 conditions per place. [2024-12-01 13:19:13,453 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 35 selfloop transitions, 24 changer transitions 0/78 dead transitions. [2024-12-01 13:19:13,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 78 transitions, 416 flow [2024-12-01 13:19:13,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-12-01 13:19:13,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-12-01 13:19:13,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 268 transitions. [2024-12-01 13:19:13,455 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.638095238095238 [2024-12-01 13:19:13,455 INFO L175 Difference]: Start difference. First operand has 60 places, 75 transitions, 304 flow. Second operand 7 states and 268 transitions. [2024-12-01 13:19:13,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 78 transitions, 416 flow [2024-12-01 13:19:13,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 78 transitions, 370 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-12-01 13:19:13,458 INFO L231 Difference]: Finished difference. Result has 60 places, 66 transitions, 252 flow [2024-12-01 13:19:13,458 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=252, PETRI_PLACES=60, PETRI_TRANSITIONS=66} [2024-12-01 13:19:13,458 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 0 predicate places. [2024-12-01 13:19:13,459 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 66 transitions, 252 flow [2024-12-01 13:19:13,459 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 31.6) internal successors, (316), 10 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-01 13:19:13,459 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-01 13:19:13,459 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-01 13:19:13,468 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-12-01 13:19:13,659 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 13:19:13,660 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-12-01 13:19:13,660 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-01 13:19:13,660 INFO L85 PathProgramCache]: Analyzing trace with hash -10419398, now seen corresponding path program 2 times [2024-12-01 13:19:13,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-01 13:19:13,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070296362] [2024-12-01 13:19:13,660 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-01 13:19:13,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-01 13:19:13,696 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-12-01 13:19:13,697 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-01 13:19:13,837 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-12-01 13:19:13,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-01 13:19:13,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070296362] [2024-12-01 13:19:13,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070296362] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-01 13:19:13,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-01 13:19:13,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-01 13:19:13,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449726123] [2024-12-01 13:19:13,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-01 13:19:13,838 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-01 13:19:13,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-01 13:19:13,839 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-01 13:19:13,839 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-01 13:19:13,869 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 60 [2024-12-01 13:19:13,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 66 transitions, 252 flow. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-01 13:19:13,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-01 13:19:13,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 60 [2024-12-01 13:19:13,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-01 13:19:14,020 INFO L124 PetriNetUnfolderBase]: 328/640 cut-off events. [2024-12-01 13:19:14,020 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2024-12-01 13:19:14,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1241 conditions, 640 events. 328/640 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2770 event pairs, 221 based on Foata normal form. 0/591 useless extension candidates. Maximal degree in co-relation 1091. Up to 472 conditions per place. [2024-12-01 13:19:14,024 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 46 selfloop transitions, 3 changer transitions 0/64 dead transitions. [2024-12-01 13:19:14,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 64 transitions, 346 flow [2024-12-01 13:19:14,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-01 13:19:14,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-01 13:19:14,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2024-12-01 13:19:14,025 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4766666666666667 [2024-12-01 13:19:14,025 INFO L175 Difference]: Start difference. First operand has 60 places, 66 transitions, 252 flow. Second operand 5 states and 143 transitions. [2024-12-01 13:19:14,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 64 transitions, 346 flow [2024-12-01 13:19:14,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 64 transitions, 298 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-12-01 13:19:14,028 INFO L231 Difference]: Finished difference. Result has 56 places, 64 transitions, 206 flow [2024-12-01 13:19:14,028 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=206, PETRI_PLACES=56, PETRI_TRANSITIONS=64} [2024-12-01 13:19:14,028 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, -4 predicate places. [2024-12-01 13:19:14,028 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 64 transitions, 206 flow [2024-12-01 13:19:14,029 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-01 13:19:14,029 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-01 13:19:14,029 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-01 13:19:14,029 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-12-01 13:19:14,029 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-12-01 13:19:14,029 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-01 13:19:14,029 INFO L85 PathProgramCache]: Analyzing trace with hash -10419397, now seen corresponding path program 1 times [2024-12-01 13:19:14,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-01 13:19:14,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458758462] [2024-12-01 13:19:14,030 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-01 13:19:14,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-01 13:19:14,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-01 13:19:14,864 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-12-01 13:19:14,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-01 13:19:14,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458758462] [2024-12-01 13:19:14,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458758462] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-01 13:19:14,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197411223] [2024-12-01 13:19:14,864 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-01 13:19:14,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 13:19:14,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-01 13:19:14,866 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-01 13:19:14,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-12-01 13:19:15,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-01 13:19:15,009 INFO L256 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-12-01 13:19:15,012 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-01 13:19:15,021 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 [2024-12-01 13:19:15,024 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 [2024-12-01 13:19:15,137 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-12-01 13:19:15,137 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-12-01 13:19:15,145 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-12-01 13:19:15,237 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-12-01 13:19:15,237 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 [2024-12-01 13:19:15,247 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-12-01 13:19:15,601 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-01 13:19:15,601 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-01 13:19:16,460 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-01 13:19:16,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197411223] provided 1 perfect and 1 imperfect interpolant sequences [2024-12-01 13:19:16,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-12-01 13:19:16,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8, 9] total 26 [2024-12-01 13:19:16,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307616723] [2024-12-01 13:19:16,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-01 13:19:16,461 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-12-01 13:19:16,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-01 13:19:16,462 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-12-01 13:19:16,462 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=555, Unknown=0, NotChecked=0, Total=756 [2024-12-01 13:19:16,938 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-12-01 13:19:16,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 64 transitions, 206 flow. Second operand has 11 states, 11 states have (on average 27.90909090909091) internal successors, (307), 11 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-01 13:19:16,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-01 13:19:16,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-12-01 13:19:16,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-01 13:19:17,372 INFO L124 PetriNetUnfolderBase]: 578/1065 cut-off events. [2024-12-01 13:19:17,373 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-12-01 13:19:17,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2021 conditions, 1065 events. 578/1065 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 5291 event pairs, 215 based on Foata normal form. 0/956 useless extension candidates. Maximal degree in co-relation 1889. Up to 440 conditions per place. [2024-12-01 13:19:17,377 INFO L140 encePairwiseOnDemand]: 53/60 looper letters, 62 selfloop transitions, 6 changer transitions 0/82 dead transitions. [2024-12-01 13:19:17,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 82 transitions, 383 flow [2024-12-01 13:19:17,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-01 13:19:17,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-12-01 13:19:17,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 207 transitions. [2024-12-01 13:19:17,379 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-12-01 13:19:17,379 INFO L175 Difference]: Start difference. First operand has 56 places, 64 transitions, 206 flow. Second operand 6 states and 207 transitions. [2024-12-01 13:19:17,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 82 transitions, 383 flow [2024-12-01 13:19:17,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 82 transitions, 378 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-12-01 13:19:17,381 INFO L231 Difference]: Finished difference. Result has 60 places, 65 transitions, 226 flow [2024-12-01 13:19:17,382 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=226, PETRI_PLACES=60, PETRI_TRANSITIONS=65} [2024-12-01 13:19:17,382 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 0 predicate places. [2024-12-01 13:19:17,382 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 65 transitions, 226 flow [2024-12-01 13:19:17,383 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 27.90909090909091) internal successors, (307), 11 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-01 13:19:17,383 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-01 13:19:17,383 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-01 13:19:17,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-12-01 13:19:17,583 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 13:19:17,584 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-12-01 13:19:17,584 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-01 13:19:17,584 INFO L85 PathProgramCache]: Analyzing trace with hash -323000482, now seen corresponding path program 1 times [2024-12-01 13:19:17,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-01 13:19:17,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964683528] [2024-12-01 13:19:17,584 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-01 13:19:17,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-01 13:19:17,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-01 13:19:17,751 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-12-01 13:19:17,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-01 13:19:17,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964683528] [2024-12-01 13:19:17,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964683528] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-01 13:19:17,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-01 13:19:17,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-01 13:19:17,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402605833] [2024-12-01 13:19:17,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-01 13:19:17,752 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-01 13:19:17,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-01 13:19:17,752 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-01 13:19:17,752 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-12-01 13:19:17,800 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 60 [2024-12-01 13:19:17,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 65 transitions, 226 flow. Second operand has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-01 13:19:17,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-01 13:19:17,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 60 [2024-12-01 13:19:17,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-01 13:19:17,955 INFO L124 PetriNetUnfolderBase]: 416/889 cut-off events. [2024-12-01 13:19:17,955 INFO L125 PetriNetUnfolderBase]: For 211/240 co-relation queries the response was YES. [2024-12-01 13:19:17,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1769 conditions, 889 events. 416/889 cut-off events. For 211/240 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 4877 event pairs, 315 based on Foata normal form. 31/818 useless extension candidates. Maximal degree in co-relation 1634. Up to 616 conditions per place. [2024-12-01 13:19:17,959 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 45 selfloop transitions, 3 changer transitions 0/63 dead transitions. [2024-12-01 13:19:17,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 63 transitions, 318 flow [2024-12-01 13:19:17,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-01 13:19:17,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-01 13:19:17,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 147 transitions. [2024-12-01 13:19:17,961 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49 [2024-12-01 13:19:17,961 INFO L175 Difference]: Start difference. First operand has 60 places, 65 transitions, 226 flow. Second operand 5 states and 147 transitions. [2024-12-01 13:19:17,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 63 transitions, 318 flow [2024-12-01 13:19:17,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 63 transitions, 310 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-12-01 13:19:17,962 INFO L231 Difference]: Finished difference. Result has 58 places, 63 transitions, 220 flow [2024-12-01 13:19:17,963 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=220, PETRI_PLACES=58, PETRI_TRANSITIONS=63} [2024-12-01 13:19:17,963 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, -2 predicate places. [2024-12-01 13:19:17,963 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 63 transitions, 220 flow [2024-12-01 13:19:17,963 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-01 13:19:17,963 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-01 13:19:17,963 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-01 13:19:17,964 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-12-01 13:19:17,964 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-12-01 13:19:17,964 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-01 13:19:17,964 INFO L85 PathProgramCache]: Analyzing trace with hash -323000481, now seen corresponding path program 1 times [2024-12-01 13:19:17,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-01 13:19:17,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261532243] [2024-12-01 13:19:17,965 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-01 13:19:17,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-01 13:19:18,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-01 13:19:18,522 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2024-12-01 13:19:18,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-01 13:19:18,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261532243] [2024-12-01 13:19:18,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261532243] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-01 13:19:18,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595962953] [2024-12-01 13:19:18,523 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-01 13:19:18,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 13:19:18,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-01 13:19:18,525 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-01 13:19:18,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-12-01 13:19:18,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-01 13:19:18,667 INFO L256 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-12-01 13:19:18,670 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-01 13:19:18,680 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 [2024-12-01 13:19:18,683 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 [2024-12-01 13:19:18,785 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-12-01 13:19:18,785 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-12-01 13:19:18,800 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-12-01 13:19:18,800 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 [2024-12-01 13:19:19,126 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-01 13:19:19,127 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-01 13:19:19,529 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-01 13:19:19,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595962953] provided 1 perfect and 1 imperfect interpolant sequences [2024-12-01 13:19:19,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-12-01 13:19:19,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 23 [2024-12-01 13:19:19,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61650457] [2024-12-01 13:19:19,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-01 13:19:19,530 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-12-01 13:19:19,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-01 13:19:19,530 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-12-01 13:19:19,530 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2024-12-01 13:19:19,834 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 60 [2024-12-01 13:19:19,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 63 transitions, 220 flow. Second operand has 10 states, 10 states have (on average 30.1) internal successors, (301), 10 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-01 13:19:19,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-01 13:19:19,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 60 [2024-12-01 13:19:19,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-01 13:19:20,101 INFO L124 PetriNetUnfolderBase]: 400/786 cut-off events. [2024-12-01 13:19:20,101 INFO L125 PetriNetUnfolderBase]: For 103/103 co-relation queries the response was YES. [2024-12-01 13:19:20,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1648 conditions, 786 events. 400/786 cut-off events. For 103/103 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3620 event pairs, 169 based on Foata normal form. 26/738 useless extension candidates. Maximal degree in co-relation 1512. Up to 377 conditions per place. [2024-12-01 13:19:20,104 INFO L140 encePairwiseOnDemand]: 54/60 looper letters, 60 selfloop transitions, 5 changer transitions 0/80 dead transitions. [2024-12-01 13:19:20,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 80 transitions, 392 flow [2024-12-01 13:19:20,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-01 13:19:20,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-12-01 13:19:20,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 216 transitions. [2024-12-01 13:19:20,105 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-12-01 13:19:20,105 INFO L175 Difference]: Start difference. First operand has 58 places, 63 transitions, 220 flow. Second operand 6 states and 216 transitions. [2024-12-01 13:19:20,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 80 transitions, 392 flow [2024-12-01 13:19:20,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 80 transitions, 387 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-12-01 13:19:20,107 INFO L231 Difference]: Finished difference. Result has 61 places, 64 transitions, 236 flow [2024-12-01 13:19:20,107 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=236, PETRI_PLACES=61, PETRI_TRANSITIONS=64} [2024-12-01 13:19:20,107 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 1 predicate places. [2024-12-01 13:19:20,108 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 64 transitions, 236 flow [2024-12-01 13:19:20,108 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 30.1) internal successors, (301), 10 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-01 13:19:20,108 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-01 13:19:20,108 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-01 13:19:20,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-12-01 13:19:20,308 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-12-01 13:19:20,309 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-12-01 13:19:20,309 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-01 13:19:20,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1474909905, now seen corresponding path program 1 times [2024-12-01 13:19:20,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-01 13:19:20,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231060929] [2024-12-01 13:19:20,309 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-01 13:19:20,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-01 13:19:20,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-01 13:19:20,624 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2024-12-01 13:19:20,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-01 13:19:20,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231060929] [2024-12-01 13:19:20,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231060929] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-01 13:19:20,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528205874] [2024-12-01 13:19:20,624 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-01 13:19:20,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 13:19:20,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-01 13:19:20,626 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-01 13:19:20,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-12-01 13:19:20,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-01 13:19:20,764 INFO L256 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-12-01 13:19:20,767 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-01 13:19:20,774 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 [2024-12-01 13:19:20,778 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 [2024-12-01 13:19:20,861 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-12-01 13:19:20,862 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 [2024-12-01 13:19:20,869 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-12-01 13:19:21,188 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-01 13:19:21,188 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-01 13:19:21,538 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-01 13:19:21,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528205874] provided 1 perfect and 1 imperfect interpolant sequences [2024-12-01 13:19:21,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-12-01 13:19:21,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 9] total 22 [2024-12-01 13:19:21,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140472797] [2024-12-01 13:19:21,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-01 13:19:21,539 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-12-01 13:19:21,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-01 13:19:21,539 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-12-01 13:19:21,540 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2024-12-01 13:19:21,832 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 60 [2024-12-01 13:19:21,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 64 transitions, 236 flow. Second operand has 10 states, 10 states have (on average 29.3) internal successors, (293), 10 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-01 13:19:21,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-01 13:19:21,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 60 [2024-12-01 13:19:21,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-01 13:19:22,144 INFO L124 PetriNetUnfolderBase]: 775/1473 cut-off events. [2024-12-01 13:19:22,144 INFO L125 PetriNetUnfolderBase]: For 996/1099 co-relation queries the response was YES. [2024-12-01 13:19:22,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3266 conditions, 1473 events. 775/1473 cut-off events. For 996/1099 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 8252 event pairs, 315 based on Foata normal form. 0/1283 useless extension candidates. Maximal degree in co-relation 3128. Up to 604 conditions per place. [2024-12-01 13:19:22,150 INFO L140 encePairwiseOnDemand]: 53/60 looper letters, 60 selfloop transitions, 6 changer transitions 0/80 dead transitions. [2024-12-01 13:19:22,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 80 transitions, 421 flow [2024-12-01 13:19:22,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-01 13:19:22,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-12-01 13:19:22,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 209 transitions. [2024-12-01 13:19:22,152 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5805555555555556 [2024-12-01 13:19:22,152 INFO L175 Difference]: Start difference. First operand has 61 places, 64 transitions, 236 flow. Second operand 6 states and 209 transitions. [2024-12-01 13:19:22,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 80 transitions, 421 flow [2024-12-01 13:19:22,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 80 transitions, 411 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-12-01 13:19:22,154 INFO L231 Difference]: Finished difference. Result has 64 places, 65 transitions, 253 flow [2024-12-01 13:19:22,154 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=253, PETRI_PLACES=64, PETRI_TRANSITIONS=65} [2024-12-01 13:19:22,154 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 4 predicate places. [2024-12-01 13:19:22,154 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 65 transitions, 253 flow [2024-12-01 13:19:22,155 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 29.3) internal successors, (293), 10 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-01 13:19:22,155 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-01 13:19:22,155 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-01 13:19:22,165 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-12-01 13:19:22,355 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-12-01 13:19:22,355 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-12-01 13:19:22,356 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-01 13:19:22,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1522434035, now seen corresponding path program 1 times [2024-12-01 13:19:22,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-01 13:19:22,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927802997] [2024-12-01 13:19:22,356 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-01 13:19:22,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-01 13:19:22,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-01 13:19:22,461 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-12-01 13:19:22,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-01 13:19:22,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927802997] [2024-12-01 13:19:22,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927802997] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-01 13:19:22,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-01 13:19:22,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-01 13:19:22,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115910237] [2024-12-01 13:19:22,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-01 13:19:22,461 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-01 13:19:22,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-01 13:19:22,462 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-01 13:19:22,462 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-01 13:19:22,503 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 60 [2024-12-01 13:19:22,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 65 transitions, 253 flow. Second operand has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-01 13:19:22,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-01 13:19:22,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 60 [2024-12-01 13:19:22,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-01 13:19:22,702 INFO L124 PetriNetUnfolderBase]: 520/1058 cut-off events. [2024-12-01 13:19:22,702 INFO L125 PetriNetUnfolderBase]: For 850/952 co-relation queries the response was YES. [2024-12-01 13:19:22,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2509 conditions, 1058 events. 520/1058 cut-off events. For 850/952 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 5708 event pairs, 406 based on Foata normal form. 36/1017 useless extension candidates. Maximal degree in co-relation 2369. Up to 773 conditions per place. [2024-12-01 13:19:22,709 INFO L140 encePairwiseOnDemand]: 56/60 looper letters, 46 selfloop transitions, 2 changer transitions 0/63 dead transitions. [2024-12-01 13:19:22,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 63 transitions, 345 flow [2024-12-01 13:19:22,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-01 13:19:22,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-01 13:19:22,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 127 transitions. [2024-12-01 13:19:22,711 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5291666666666667 [2024-12-01 13:19:22,711 INFO L175 Difference]: Start difference. First operand has 64 places, 65 transitions, 253 flow. Second operand 4 states and 127 transitions. [2024-12-01 13:19:22,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 63 transitions, 345 flow [2024-12-01 13:19:22,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 63 transitions, 337 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-12-01 13:19:22,713 INFO L231 Difference]: Finished difference. Result has 61 places, 63 transitions, 245 flow [2024-12-01 13:19:22,713 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=245, PETRI_PLACES=61, PETRI_TRANSITIONS=63} [2024-12-01 13:19:22,713 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 1 predicate places. [2024-12-01 13:19:22,713 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 63 transitions, 245 flow [2024-12-01 13:19:22,714 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-01 13:19:22,714 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-01 13:19:22,714 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-01 13:19:22,714 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-12-01 13:19:22,714 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-12-01 13:19:22,714 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-01 13:19:22,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1522434036, now seen corresponding path program 1 times [2024-12-01 13:19:22,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-01 13:19:22,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126368277] [2024-12-01 13:19:22,715 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-01 13:19:22,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-01 13:19:22,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-01 13:19:23,028 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-12-01 13:19:23,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-01 13:19:23,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126368277] [2024-12-01 13:19:23,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126368277] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-01 13:19:23,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440222792] [2024-12-01 13:19:23,028 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-01 13:19:23,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 13:19:23,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-01 13:19:23,031 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-01 13:19:23,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-12-01 13:19:23,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-01 13:19:23,190 INFO L256 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-12-01 13:19:23,192 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-01 13:19:23,345 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-01 13:19:23,345 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-01 13:19:23,420 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 [2024-12-01 13:19:23,510 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-01 13:19:23,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440222792] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-01 13:19:23,510 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-01 13:19:23,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 20 [2024-12-01 13:19:23,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582032411] [2024-12-01 13:19:23,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-01 13:19:23,511 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-12-01 13:19:23,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-01 13:19:23,511 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-12-01 13:19:23,512 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2024-12-01 13:19:24,045 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 60 [2024-12-01 13:19:24,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 63 transitions, 245 flow. Second operand has 21 states, 21 states have (on average 30.333333333333332) internal successors, (637), 21 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-01 13:19:24,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-01 13:19:24,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 60 [2024-12-01 13:19:24,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-01 13:19:24,572 INFO L124 PetriNetUnfolderBase]: 888/1716 cut-off events. [2024-12-01 13:19:24,572 INFO L125 PetriNetUnfolderBase]: For 1091/1210 co-relation queries the response was YES. [2024-12-01 13:19:24,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4161 conditions, 1716 events. 888/1716 cut-off events. For 1091/1210 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 9816 event pairs, 315 based on Foata normal form. 92/1724 useless extension candidates. Maximal degree in co-relation 4021. Up to 650 conditions per place. [2024-12-01 13:19:24,580 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 74 selfloop transitions, 19 changer transitions 0/107 dead transitions. [2024-12-01 13:19:24,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 107 transitions, 587 flow [2024-12-01 13:19:24,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-12-01 13:19:24,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-12-01 13:19:24,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 366 transitions. [2024-12-01 13:19:24,582 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.61 [2024-12-01 13:19:24,582 INFO L175 Difference]: Start difference. First operand has 61 places, 63 transitions, 245 flow. Second operand 10 states and 366 transitions. [2024-12-01 13:19:24,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 107 transitions, 587 flow [2024-12-01 13:19:24,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 107 transitions, 584 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-12-01 13:19:24,585 INFO L231 Difference]: Finished difference. Result has 70 places, 65 transitions, 300 flow [2024-12-01 13:19:24,585 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=300, PETRI_PLACES=70, PETRI_TRANSITIONS=65} [2024-12-01 13:19:24,585 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 10 predicate places. [2024-12-01 13:19:24,585 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 65 transitions, 300 flow [2024-12-01 13:19:24,586 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 30.333333333333332) internal successors, (637), 21 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-01 13:19:24,586 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-01 13:19:24,586 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-01 13:19:24,593 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-12-01 13:19:24,786 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-12-01 13:19:24,787 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-12-01 13:19:24,787 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-01 13:19:24,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1165787740, now seen corresponding path program 1 times [2024-12-01 13:19:24,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-01 13:19:24,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54410134] [2024-12-01 13:19:24,787 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-01 13:19:24,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-01 13:19:24,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-01 13:19:25,530 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-12-01 13:19:25,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-01 13:19:25,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54410134] [2024-12-01 13:19:25,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54410134] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-01 13:19:25,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802471184] [2024-12-01 13:19:25,531 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-01 13:19:25,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 13:19:25,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-01 13:19:25,533 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-01 13:19:25,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-12-01 13:19:25,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-01 13:19:25,705 INFO L256 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-12-01 13:19:25,708 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-01 13:19:25,712 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 [2024-12-01 13:19:25,769 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-12-01 13:19:25,770 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-12-01 13:19:25,777 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 [2024-12-01 13:19:25,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-12-01 13:19:25,888 INFO L349 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2024-12-01 13:19:25,889 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 22 [2024-12-01 13:19:25,900 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-12-01 13:19:25,900 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 [2024-12-01 13:19:26,352 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-01 13:19:26,352 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-01 13:19:26,794 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-12-01 13:19:26,913 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-01 13:19:26,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802471184] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-01 13:19:26,913 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-01 13:19:26,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 28 [2024-12-01 13:19:26,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395251921] [2024-12-01 13:19:26,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-01 13:19:26,914 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-12-01 13:19:26,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-01 13:19:26,915 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-12-01 13:19:26,915 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=650, Unknown=0, NotChecked=0, Total=870 [2024-12-01 13:19:28,121 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 60 [2024-12-01 13:19:28,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 65 transitions, 300 flow. Second operand has 30 states, 30 states have (on average 20.166666666666668) internal successors, (605), 30 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-01 13:19:28,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-01 13:19:28,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 60 [2024-12-01 13:19:28,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-01 13:19:29,856 INFO L124 PetriNetUnfolderBase]: 3065/5364 cut-off events. [2024-12-01 13:19:29,856 INFO L125 PetriNetUnfolderBase]: For 6241/6407 co-relation queries the response was YES. [2024-12-01 13:19:29,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14285 conditions, 5364 events. 3065/5364 cut-off events. For 6241/6407 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 34848 event pairs, 541 based on Foata normal form. 216/5546 useless extension candidates. Maximal degree in co-relation 14116. Up to 1012 conditions per place. [2024-12-01 13:19:29,892 INFO L140 encePairwiseOnDemand]: 49/60 looper letters, 123 selfloop transitions, 27 changer transitions 0/161 dead transitions. [2024-12-01 13:19:29,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 161 transitions, 962 flow [2024-12-01 13:19:29,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-12-01 13:19:29,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-12-01 13:19:29,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 503 transitions. [2024-12-01 13:19:29,895 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4191666666666667 [2024-12-01 13:19:29,895 INFO L175 Difference]: Start difference. First operand has 70 places, 65 transitions, 300 flow. Second operand 20 states and 503 transitions. [2024-12-01 13:19:29,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 161 transitions, 962 flow [2024-12-01 13:19:29,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 161 transitions, 929 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-12-01 13:19:29,901 INFO L231 Difference]: Finished difference. Result has 88 places, 70 transitions, 376 flow [2024-12-01 13:19:29,902 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=376, PETRI_PLACES=88, PETRI_TRANSITIONS=70} [2024-12-01 13:19:29,902 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 28 predicate places. [2024-12-01 13:19:29,902 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 70 transitions, 376 flow [2024-12-01 13:19:29,903 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 20.166666666666668) internal successors, (605), 30 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-01 13:19:29,903 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-01 13:19:29,903 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-01 13:19:29,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-12-01 13:19:30,103 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 13:19:30,103 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-12-01 13:19:30,104 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-01 13:19:30,104 INFO L85 PathProgramCache]: Analyzing trace with hash -89217481, now seen corresponding path program 1 times [2024-12-01 13:19:30,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-01 13:19:30,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454997045] [2024-12-01 13:19:30,104 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-01 13:19:30,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-01 13:19:30,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-01 13:19:30,740 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-12-01 13:19:30,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-01 13:19:30,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454997045] [2024-12-01 13:19:30,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454997045] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-01 13:19:30,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551300908] [2024-12-01 13:19:30,741 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-01 13:19:30,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 13:19:30,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-01 13:19:30,742 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-01 13:19:30,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-12-01 13:19:30,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-01 13:19:30,864 INFO L256 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-12-01 13:19:30,866 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-01 13:19:30,873 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 [2024-12-01 13:19:30,876 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 [2024-12-01 13:19:30,958 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-12-01 13:19:30,958 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-12-01 13:19:30,963 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-12-01 13:19:31,046 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-12-01 13:19:31,047 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-12-01 13:19:31,059 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-12-01 13:19:31,059 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 [2024-12-01 13:19:31,406 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-01 13:19:31,406 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-01 13:19:32,120 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-01 13:19:32,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551300908] provided 1 perfect and 1 imperfect interpolant sequences [2024-12-01 13:19:32,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-12-01 13:19:32,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 25 [2024-12-01 13:19:32,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029698842] [2024-12-01 13:19:32,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-01 13:19:32,120 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-12-01 13:19:32,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-01 13:19:32,121 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-12-01 13:19:32,121 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=541, Unknown=0, NotChecked=0, Total=702 [2024-12-01 13:19:32,572 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-12-01 13:19:32,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 70 transitions, 376 flow. Second operand has 11 states, 11 states have (on average 28.272727272727273) internal successors, (311), 11 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-01 13:19:32,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-01 13:19:32,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-12-01 13:19:32,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-01 13:19:33,603 INFO L124 PetriNetUnfolderBase]: 4725/8020 cut-off events. [2024-12-01 13:19:33,603 INFO L125 PetriNetUnfolderBase]: For 15740/16203 co-relation queries the response was YES. [2024-12-01 13:19:33,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22927 conditions, 8020 events. 4725/8020 cut-off events. For 15740/16203 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 54757 event pairs, 2389 based on Foata normal form. 0/7726 useless extension candidates. Maximal degree in co-relation 22844. Up to 3942 conditions per place. [2024-12-01 13:19:33,641 INFO L140 encePairwiseOnDemand]: 53/60 looper letters, 73 selfloop transitions, 7 changer transitions 0/91 dead transitions. [2024-12-01 13:19:33,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 91 transitions, 662 flow [2024-12-01 13:19:33,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-01 13:19:33,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-12-01 13:19:33,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 203 transitions. [2024-12-01 13:19:33,643 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5638888888888889 [2024-12-01 13:19:33,643 INFO L175 Difference]: Start difference. First operand has 88 places, 70 transitions, 376 flow. Second operand 6 states and 203 transitions. [2024-12-01 13:19:33,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 91 transitions, 662 flow [2024-12-01 13:19:33,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 91 transitions, 626 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-12-01 13:19:33,652 INFO L231 Difference]: Finished difference. Result has 88 places, 71 transitions, 369 flow [2024-12-01 13:19:33,652 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=369, PETRI_PLACES=88, PETRI_TRANSITIONS=71} [2024-12-01 13:19:33,652 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 28 predicate places. [2024-12-01 13:19:33,652 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 71 transitions, 369 flow [2024-12-01 13:19:33,652 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 28.272727272727273) internal successors, (311), 11 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-01 13:19:33,652 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-01 13:19:33,652 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-01 13:19:33,659 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-12-01 13:19:33,853 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-12-01 13:19:33,853 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-12-01 13:19:33,853 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-01 13:19:33,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1779680746, now seen corresponding path program 1 times [2024-12-01 13:19:33,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-01 13:19:33,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357103157] [2024-12-01 13:19:33,854 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-01 13:19:33,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-01 13:19:33,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-01 13:19:34,250 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2024-12-01 13:19:34,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-01 13:19:34,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357103157] [2024-12-01 13:19:34,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357103157] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-01 13:19:34,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814300249] [2024-12-01 13:19:34,251 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-01 13:19:34,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 13:19:34,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-01 13:19:34,253 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-01 13:19:34,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-12-01 13:19:34,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-01 13:19:34,390 INFO L256 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-12-01 13:19:34,392 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-01 13:19:34,397 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 [2024-12-01 13:19:34,400 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 [2024-12-01 13:19:34,479 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-12-01 13:19:34,479 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 [2024-12-01 13:19:34,484 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-12-01 13:19:34,787 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-01 13:19:34,787 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-01 13:19:35,142 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 25 proven. 3 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-01 13:19:35,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814300249] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-01 13:19:35,143 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-01 13:19:35,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 25 [2024-12-01 13:19:35,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653917730] [2024-12-01 13:19:35,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-01 13:19:35,143 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-12-01 13:19:35,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-01 13:19:35,144 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-12-01 13:19:35,144 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=486, Unknown=0, NotChecked=0, Total=650 [2024-12-01 13:19:36,349 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 60 [2024-12-01 13:19:36,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 71 transitions, 369 flow. Second operand has 26 states, 26 states have (on average 27.115384615384617) internal successors, (705), 26 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-01 13:19:36,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-01 13:19:36,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 60 [2024-12-01 13:19:36,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-01 13:19:37,444 INFO L124 PetriNetUnfolderBase]: 2890/5394 cut-off events. [2024-12-01 13:19:37,444 INFO L125 PetriNetUnfolderBase]: For 10382/10725 co-relation queries the response was YES. [2024-12-01 13:19:37,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16713 conditions, 5394 events. 2890/5394 cut-off events. For 10382/10725 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 37304 event pairs, 626 based on Foata normal form. 258/5549 useless extension candidates. Maximal degree in co-relation 16632. Up to 1299 conditions per place. [2024-12-01 13:19:37,474 INFO L140 encePairwiseOnDemand]: 53/60 looper letters, 120 selfloop transitions, 12 changer transitions 0/148 dead transitions. [2024-12-01 13:19:37,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 148 transitions, 952 flow [2024-12-01 13:19:37,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-12-01 13:19:37,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-12-01 13:19:37,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 434 transitions. [2024-12-01 13:19:37,475 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5564102564102564 [2024-12-01 13:19:37,476 INFO L175 Difference]: Start difference. First operand has 88 places, 71 transitions, 369 flow. Second operand 13 states and 434 transitions. [2024-12-01 13:19:37,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 148 transitions, 952 flow [2024-12-01 13:19:37,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 148 transitions, 930 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-12-01 13:19:37,489 INFO L231 Difference]: Finished difference. Result has 99 places, 72 transitions, 404 flow [2024-12-01 13:19:37,489 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=355, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=404, PETRI_PLACES=99, PETRI_TRANSITIONS=72} [2024-12-01 13:19:37,489 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 39 predicate places. [2024-12-01 13:19:37,489 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 72 transitions, 404 flow [2024-12-01 13:19:37,489 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 27.115384615384617) internal successors, (705), 26 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-01 13:19:37,490 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-01 13:19:37,490 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-01 13:19:37,501 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-12-01 13:19:37,690 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-12-01 13:19:37,690 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-12-01 13:19:37,691 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-01 13:19:37,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1524709863, now seen corresponding path program 1 times [2024-12-01 13:19:37,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-01 13:19:37,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101906504] [2024-12-01 13:19:37,691 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-01 13:19:37,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-01 13:19:37,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-01 13:19:38,168 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2024-12-01 13:19:38,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-01 13:19:38,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101906504] [2024-12-01 13:19:38,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101906504] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-01 13:19:38,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003959366] [2024-12-01 13:19:38,168 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-01 13:19:38,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 13:19:38,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-01 13:19:38,170 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-01 13:19:38,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-12-01 13:19:38,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-01 13:19:38,300 INFO L256 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-12-01 13:19:38,302 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-01 13:19:38,306 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 [2024-12-01 13:19:38,310 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 [2024-12-01 13:19:38,374 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-12-01 13:19:38,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-12-01 13:19:38,386 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-12-01 13:19:38,387 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 [2024-12-01 13:19:38,744 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-01 13:19:38,744 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-01 13:19:39,101 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-01 13:19:39,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003959366] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-01 13:19:39,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-01 13:19:39,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 25 [2024-12-01 13:19:39,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812842610] [2024-12-01 13:19:39,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-01 13:19:39,102 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-12-01 13:19:39,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-01 13:19:39,102 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-12-01 13:19:39,103 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=486, Unknown=0, NotChecked=0, Total=650 [2024-12-01 13:19:40,130 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 60 [2024-12-01 13:19:40,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 72 transitions, 404 flow. Second operand has 26 states, 26 states have (on average 26.46153846153846) internal successors, (688), 26 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-01 13:19:40,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-01 13:19:40,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 60 [2024-12-01 13:19:40,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-01 13:19:41,727 INFO L124 PetriNetUnfolderBase]: 5665/9820 cut-off events. [2024-12-01 13:19:41,727 INFO L125 PetriNetUnfolderBase]: For 25405/26460 co-relation queries the response was YES. [2024-12-01 13:19:41,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30781 conditions, 9820 events. 5665/9820 cut-off events. For 25405/26460 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 69948 event pairs, 1204 based on Foata normal form. 471/10195 useless extension candidates. Maximal degree in co-relation 30699. Up to 1950 conditions per place. [2024-12-01 13:19:41,787 INFO L140 encePairwiseOnDemand]: 52/60 looper letters, 125 selfloop transitions, 13 changer transitions 0/152 dead transitions. [2024-12-01 13:19:41,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 152 transitions, 1158 flow [2024-12-01 13:19:41,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-12-01 13:19:41,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-12-01 13:19:41,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 417 transitions. [2024-12-01 13:19:41,789 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5346153846153846 [2024-12-01 13:19:41,789 INFO L175 Difference]: Start difference. First operand has 99 places, 72 transitions, 404 flow. Second operand 13 states and 417 transitions. [2024-12-01 13:19:41,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 152 transitions, 1158 flow [2024-12-01 13:19:41,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 152 transitions, 1104 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-12-01 13:19:41,809 INFO L231 Difference]: Finished difference. Result has 109 places, 74 transitions, 447 flow [2024-12-01 13:19:41,809 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=390, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=447, PETRI_PLACES=109, PETRI_TRANSITIONS=74} [2024-12-01 13:19:41,810 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 49 predicate places. [2024-12-01 13:19:41,810 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 74 transitions, 447 flow [2024-12-01 13:19:41,810 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 26.46153846153846) internal successors, (688), 26 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-01 13:19:41,810 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-01 13:19:41,810 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-01 13:19:41,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-12-01 13:19:42,010 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-12-01 13:19:42,011 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-12-01 13:19:42,011 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-01 13:19:42,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1529226229, now seen corresponding path program 1 times [2024-12-01 13:19:42,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-01 13:19:42,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822762467] [2024-12-01 13:19:42,012 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-01 13:19:42,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-01 13:19:42,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-01 13:19:42,207 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-12-01 13:19:42,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-01 13:19:42,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822762467] [2024-12-01 13:19:42,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822762467] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-01 13:19:42,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161863919] [2024-12-01 13:19:42,207 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-01 13:19:42,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 13:19:42,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-01 13:19:42,209 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-01 13:19:42,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-12-01 13:19:42,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-01 13:19:42,378 INFO L256 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-12-01 13:19:42,380 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-01 13:19:42,517 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-01 13:19:42,517 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-01 13:19:42,577 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 [2024-12-01 13:19:42,646 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-01 13:19:42,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161863919] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-01 13:19:42,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-01 13:19:42,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 20 [2024-12-01 13:19:42,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674933493] [2024-12-01 13:19:42,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-01 13:19:42,646 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-12-01 13:19:42,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-01 13:19:42,647 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-12-01 13:19:42,647 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2024-12-01 13:19:43,121 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 60 [2024-12-01 13:19:43,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 74 transitions, 447 flow. Second operand has 21 states, 21 states have (on average 30.61904761904762) internal successors, (643), 21 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-01 13:19:43,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-01 13:19:43,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 60 [2024-12-01 13:19:43,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-01 13:19:44,912 INFO L124 PetriNetUnfolderBase]: 6204/11800 cut-off events. [2024-12-01 13:19:44,913 INFO L125 PetriNetUnfolderBase]: For 32626/33810 co-relation queries the response was YES. [2024-12-01 13:19:44,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36945 conditions, 11800 events. 6204/11800 cut-off events. For 32626/33810 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 96188 event pairs, 2903 based on Foata normal form. 644/12231 useless extension candidates. Maximal degree in co-relation 36859. Up to 4940 conditions per place. [2024-12-01 13:19:44,981 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 89 selfloop transitions, 20 changer transitions 0/126 dead transitions. [2024-12-01 13:19:44,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 126 transitions, 1007 flow [2024-12-01 13:19:44,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-12-01 13:19:44,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-12-01 13:19:44,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 362 transitions. [2024-12-01 13:19:44,983 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6033333333333334 [2024-12-01 13:19:44,983 INFO L175 Difference]: Start difference. First operand has 109 places, 74 transitions, 447 flow. Second operand 10 states and 362 transitions. [2024-12-01 13:19:44,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 126 transitions, 1007 flow [2024-12-01 13:19:45,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 126 transitions, 963 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-12-01 13:19:45,018 INFO L231 Difference]: Finished difference. Result has 110 places, 76 transitions, 483 flow [2024-12-01 13:19:45,018 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=423, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=483, PETRI_PLACES=110, PETRI_TRANSITIONS=76} [2024-12-01 13:19:45,018 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 50 predicate places. [2024-12-01 13:19:45,018 INFO L471 AbstractCegarLoop]: Abstraction has has 110 places, 76 transitions, 483 flow [2024-12-01 13:19:45,019 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 30.61904761904762) internal successors, (643), 21 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-01 13:19:45,019 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-01 13:19:45,019 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-01 13:19:45,025 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-12-01 13:19:45,219 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-12-01 13:19:45,219 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-12-01 13:19:45,220 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-01 13:19:45,220 INFO L85 PathProgramCache]: Analyzing trace with hash 707620602, now seen corresponding path program 1 times [2024-12-01 13:19:45,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-01 13:19:45,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716240780] [2024-12-01 13:19:45,220 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-01 13:19:45,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-01 13:19:45,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-01 13:19:45,797 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-12-01 13:19:45,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-01 13:19:45,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716240780] [2024-12-01 13:19:45,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716240780] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-01 13:19:45,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410719054] [2024-12-01 13:19:45,798 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-01 13:19:45,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 13:19:45,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-01 13:19:45,799 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-01 13:19:45,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-12-01 13:19:45,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-01 13:19:45,947 INFO L256 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-12-01 13:19:45,949 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-01 13:19:45,954 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 [2024-12-01 13:19:45,956 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 [2024-12-01 13:19:46,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-12-01 13:19:46,031 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-12-01 13:19:46,044 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-12-01 13:19:46,044 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-12-01 13:19:46,108 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-12-01 13:19:46,108 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 [2024-12-01 13:19:46,116 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-12-01 13:19:46,498 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-01 13:19:46,498 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-01 13:19:47,100 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-01 13:19:47,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410719054] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-01 13:19:47,100 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-01 13:19:47,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 28 [2024-12-01 13:19:47,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575052752] [2024-12-01 13:19:47,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-01 13:19:47,101 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-12-01 13:19:47,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-01 13:19:47,102 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-12-01 13:19:47,102 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=679, Unknown=0, NotChecked=0, Total=870 [2024-12-01 13:19:48,690 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 60 [2024-12-01 13:19:48,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 76 transitions, 483 flow. Second operand has 30 states, 30 states have (on average 23.566666666666666) internal successors, (707), 30 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-01 13:19:48,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-01 13:19:48,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 60 [2024-12-01 13:19:48,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-01 13:19:53,044 INFO L124 PetriNetUnfolderBase]: 16365/27404 cut-off events. [2024-12-01 13:19:53,044 INFO L125 PetriNetUnfolderBase]: For 76187/78397 co-relation queries the response was YES. [2024-12-01 13:19:53,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90893 conditions, 27404 events. 16365/27404 cut-off events. For 76187/78397 co-relation queries the response was YES. Maximal size of possible extension queue 814. Compared 216552 event pairs, 4073 based on Foata normal form. 1296/28647 useless extension candidates. Maximal degree in co-relation 90799. Up to 6348 conditions per place. [2024-12-01 13:19:53,210 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 145 selfloop transitions, 19 changer transitions 0/176 dead transitions. [2024-12-01 13:19:53,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 176 transitions, 1473 flow [2024-12-01 13:19:53,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-12-01 13:19:53,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-12-01 13:19:53,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 383 transitions. [2024-12-01 13:19:53,212 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.491025641025641 [2024-12-01 13:19:53,212 INFO L175 Difference]: Start difference. First operand has 110 places, 76 transitions, 483 flow. Second operand 13 states and 383 transitions. [2024-12-01 13:19:53,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 176 transitions, 1473 flow [2024-12-01 13:19:53,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 176 transitions, 1440 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-12-01 13:19:53,301 INFO L231 Difference]: Finished difference. Result has 120 places, 78 transitions, 519 flow [2024-12-01 13:19:53,301 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=450, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=519, PETRI_PLACES=120, PETRI_TRANSITIONS=78} [2024-12-01 13:19:53,301 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 60 predicate places. [2024-12-01 13:19:53,302 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 78 transitions, 519 flow [2024-12-01 13:19:53,302 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 23.566666666666666) internal successors, (707), 30 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-01 13:19:53,302 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-01 13:19:53,302 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-01 13:19:53,309 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-12-01 13:19:53,502 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-12-01 13:19:53,502 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-12-01 13:19:53,503 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-01 13:19:53,503 INFO L85 PathProgramCache]: Analyzing trace with hash -818571212, now seen corresponding path program 1 times [2024-12-01 13:19:53,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-01 13:19:53,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744777632] [2024-12-01 13:19:53,503 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-01 13:19:53,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-01 13:19:53,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-01 13:19:53,793 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-12-01 13:19:53,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-01 13:19:53,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744777632] [2024-12-01 13:19:53,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744777632] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-01 13:19:53,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858208154] [2024-12-01 13:19:53,794 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-01 13:19:53,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 13:19:53,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-01 13:19:53,796 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-01 13:19:53,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-12-01 13:19:53,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-01 13:19:53,963 INFO L256 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-12-01 13:19:53,964 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-01 13:19:54,285 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-01 13:19:54,285 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-01 13:19:54,408 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 [2024-12-01 13:19:54,508 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-01 13:19:54,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858208154] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-01 13:19:54,508 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-01 13:19:54,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 11] total 27 [2024-12-01 13:19:54,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874405402] [2024-12-01 13:19:54,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-01 13:19:54,509 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-12-01 13:19:54,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-01 13:19:54,509 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-12-01 13:19:54,509 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2024-12-01 13:19:55,529 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 60 [2024-12-01 13:19:55,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 78 transitions, 519 flow. Second operand has 28 states, 28 states have (on average 30.0) internal successors, (840), 28 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-01 13:19:55,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-01 13:19:55,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 60 [2024-12-01 13:19:55,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-01 13:19:59,045 INFO L124 PetriNetUnfolderBase]: 10683/20444 cut-off events. [2024-12-01 13:19:59,045 INFO L125 PetriNetUnfolderBase]: For 70739/72686 co-relation queries the response was YES. [2024-12-01 13:19:59,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72415 conditions, 20444 events. 10683/20444 cut-off events. For 70739/72686 co-relation queries the response was YES. Maximal size of possible extension queue 636. Compared 176958 event pairs, 2437 based on Foata normal form. 957/21039 useless extension candidates. Maximal degree in co-relation 72321. Up to 4405 conditions per place. [2024-12-01 13:19:59,215 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 156 selfloop transitions, 23 changer transitions 0/197 dead transitions. [2024-12-01 13:19:59,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 197 transitions, 1678 flow [2024-12-01 13:19:59,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-12-01 13:19:59,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-12-01 13:19:59,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 496 transitions. [2024-12-01 13:19:59,217 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6358974358974359 [2024-12-01 13:19:59,217 INFO L175 Difference]: Start difference. First operand has 120 places, 78 transitions, 519 flow. Second operand 13 states and 496 transitions. [2024-12-01 13:19:59,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 197 transitions, 1678 flow [2024-12-01 13:19:59,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 197 transitions, 1592 flow, removed 12 selfloop flow, removed 10 redundant places. [2024-12-01 13:19:59,355 INFO L231 Difference]: Finished difference. Result has 125 places, 80 transitions, 561 flow [2024-12-01 13:19:59,355 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=483, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=561, PETRI_PLACES=125, PETRI_TRANSITIONS=80} [2024-12-01 13:19:59,355 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 65 predicate places. [2024-12-01 13:19:59,355 INFO L471 AbstractCegarLoop]: Abstraction has has 125 places, 80 transitions, 561 flow [2024-12-01 13:19:59,356 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 30.0) internal successors, (840), 28 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-01 13:19:59,356 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-01 13:19:59,356 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-01 13:19:59,363 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-12-01 13:19:59,556 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 13:19:59,556 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-12-01 13:19:59,557 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-01 13:19:59,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1763123925, now seen corresponding path program 1 times [2024-12-01 13:19:59,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-01 13:19:59,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243033408] [2024-12-01 13:19:59,557 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-01 13:19:59,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-01 13:19:59,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-01 13:19:59,996 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-12-01 13:19:59,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-01 13:19:59,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243033408] [2024-12-01 13:19:59,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243033408] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-01 13:19:59,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492730782] [2024-12-01 13:19:59,997 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-01 13:19:59,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 13:19:59,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-01 13:19:59,999 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-01 13:20:00,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-12-01 13:20:00,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-01 13:20:00,182 INFO L256 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-12-01 13:20:00,185 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-01 13:20:00,196 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 [2024-12-01 13:20:00,332 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-12-01 13:20:00,332 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-12-01 13:20:00,469 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-01 13:20:00,469 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-01 13:20:00,629 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-12-01 13:20:00,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492730782] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-01 13:20:00,629 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-01 13:20:00,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12, 6] total 21 [2024-12-01 13:20:00,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813767312] [2024-12-01 13:20:00,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-01 13:20:00,629 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-12-01 13:20:00,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-01 13:20:00,630 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-12-01 13:20:00,630 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2024-12-01 13:20:01,606 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 60 [2024-12-01 13:20:01,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 80 transitions, 561 flow. Second operand has 22 states, 22 states have (on average 30.318181818181817) internal successors, (667), 22 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-01 13:20:01,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-01 13:20:01,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 60 [2024-12-01 13:20:01,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-01 13:20:05,480 INFO L124 PetriNetUnfolderBase]: 12849/24473 cut-off events. [2024-12-01 13:20:05,480 INFO L125 PetriNetUnfolderBase]: For 94643/96875 co-relation queries the response was YES. [2024-12-01 13:20:05,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89582 conditions, 24473 events. 12849/24473 cut-off events. For 94643/96875 co-relation queries the response was YES. Maximal size of possible extension queue 724. Compared 215363 event pairs, 3452 based on Foata normal form. 1143/25339 useless extension candidates. Maximal degree in co-relation 89481. Up to 5988 conditions per place. [2024-12-01 13:20:05,663 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 158 selfloop transitions, 23 changer transitions 0/199 dead transitions. [2024-12-01 13:20:05,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 199 transitions, 1839 flow [2024-12-01 13:20:05,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-12-01 13:20:05,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-12-01 13:20:05,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 486 transitions. [2024-12-01 13:20:05,664 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6230769230769231 [2024-12-01 13:20:05,665 INFO L175 Difference]: Start difference. First operand has 125 places, 80 transitions, 561 flow. Second operand 13 states and 486 transitions. [2024-12-01 13:20:05,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 199 transitions, 1839 flow [2024-12-01 13:20:05,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 199 transitions, 1770 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-12-01 13:20:05,848 INFO L231 Difference]: Finished difference. Result has 131 places, 82 transitions, 600 flow [2024-12-01 13:20:05,848 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=522, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=600, PETRI_PLACES=131, PETRI_TRANSITIONS=82} [2024-12-01 13:20:05,849 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 71 predicate places. [2024-12-01 13:20:05,849 INFO L471 AbstractCegarLoop]: Abstraction has has 131 places, 82 transitions, 600 flow [2024-12-01 13:20:05,849 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 30.318181818181817) internal successors, (667), 22 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-01 13:20:05,849 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-01 13:20:05,849 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2024-12-01 13:20:05,857 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-12-01 13:20:06,050 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 13:20:06,050 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-12-01 13:20:06,050 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-01 13:20:06,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1832514043, now seen corresponding path program 2 times [2024-12-01 13:20:06,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-01 13:20:06,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502147389] [2024-12-01 13:20:06,051 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-01 13:20:06,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-01 13:20:06,091 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-01 13:20:06,091 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-01 13:20:06,897 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2024-12-01 13:20:06,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-01 13:20:06,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502147389] [2024-12-01 13:20:06,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502147389] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-01 13:20:06,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121881808] [2024-12-01 13:20:06,899 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-01 13:20:06,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 13:20:06,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-01 13:20:06,902 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-01 13:20:06,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-12-01 13:20:07,110 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-01 13:20:07,110 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-01 13:20:07,112 INFO L256 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-12-01 13:20:07,114 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-01 13:20:07,119 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 [2024-12-01 13:20:07,122 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 [2024-12-01 13:20:07,191 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-12-01 13:20:07,191 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2024-12-01 13:20:07,196 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-12-01 13:20:07,320 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2024-12-01 13:20:07,320 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2024-12-01 13:20:07,325 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-12-01 13:20:07,832 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-01 13:20:07,832 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-01 13:20:08,512 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-01 13:20:08,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121881808] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-01 13:20:08,512 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-01 13:20:08,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 13] total 35 [2024-12-01 13:20:08,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242223493] [2024-12-01 13:20:08,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-01 13:20:08,513 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-12-01 13:20:08,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-01 13:20:08,513 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-12-01 13:20:08,514 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=1028, Unknown=0, NotChecked=0, Total=1332 [2024-12-01 13:20:10,067 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 60 [2024-12-01 13:20:10,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 82 transitions, 600 flow. Second operand has 37 states, 37 states have (on average 22.513513513513512) internal successors, (833), 37 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-01 13:20:10,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-01 13:20:10,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 60 [2024-12-01 13:20:10,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-01 13:20:19,038 INFO L124 PetriNetUnfolderBase]: 35878/53076 cut-off events. [2024-12-01 13:20:19,038 INFO L125 PetriNetUnfolderBase]: For 242214/247058 co-relation queries the response was YES. [2024-12-01 13:20:19,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212694 conditions, 53076 events. 35878/53076 cut-off events. For 242214/247058 co-relation queries the response was YES. Maximal size of possible extension queue 1254. Compared 383571 event pairs, 702 based on Foata normal form. 1044/50927 useless extension candidates. Maximal degree in co-relation 212590. Up to 8285 conditions per place. [2024-12-01 13:20:19,460 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 259 selfloop transitions, 21 changer transitions 0/291 dead transitions. [2024-12-01 13:20:19,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 291 transitions, 2693 flow [2024-12-01 13:20:19,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-12-01 13:20:19,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-12-01 13:20:19,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 494 transitions. [2024-12-01 13:20:19,461 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5145833333333333 [2024-12-01 13:20:19,461 INFO L175 Difference]: Start difference. First operand has 131 places, 82 transitions, 600 flow. Second operand 16 states and 494 transitions. [2024-12-01 13:20:19,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 291 transitions, 2693 flow [2024-12-01 13:20:19,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 291 transitions, 2590 flow, removed 0 selfloop flow, removed 13 redundant places. [2024-12-01 13:20:19,906 INFO L231 Difference]: Finished difference. Result has 133 places, 83 transitions, 595 flow [2024-12-01 13:20:19,907 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=535, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=595, PETRI_PLACES=133, PETRI_TRANSITIONS=83} [2024-12-01 13:20:19,907 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 73 predicate places. [2024-12-01 13:20:19,907 INFO L471 AbstractCegarLoop]: Abstraction has has 133 places, 83 transitions, 595 flow [2024-12-01 13:20:19,907 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 22.513513513513512) internal successors, (833), 37 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-01 13:20:19,907 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-01 13:20:19,907 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-01 13:20:19,915 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-12-01 13:20:20,108 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-12-01 13:20:20,108 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-12-01 13:20:20,108 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-01 13:20:20,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1624894457, now seen corresponding path program 1 times [2024-12-01 13:20:20,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-01 13:20:20,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133106710] [2024-12-01 13:20:20,109 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-01 13:20:20,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-01 13:20:20,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-01 13:20:20,206 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-12-01 13:20:20,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-01 13:20:20,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133106710] [2024-12-01 13:20:20,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133106710] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-01 13:20:20,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-01 13:20:20,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-01 13:20:20,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108842702] [2024-12-01 13:20:20,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-01 13:20:20,207 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-01 13:20:20,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-01 13:20:20,207 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-01 13:20:20,207 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-12-01 13:20:20,216 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 60 [2024-12-01 13:20:20,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 83 transitions, 595 flow. Second operand has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-01 13:20:20,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-01 13:20:20,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 60 [2024-12-01 13:20:20,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-01 13:20:23,742 INFO L124 PetriNetUnfolderBase]: 14188/24562 cut-off events. [2024-12-01 13:20:23,742 INFO L125 PetriNetUnfolderBase]: For 112719/116024 co-relation queries the response was YES. [2024-12-01 13:20:23,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93773 conditions, 24562 events. 14188/24562 cut-off events. For 112719/116024 co-relation queries the response was YES. Maximal size of possible extension queue 733. Compared 199763 event pairs, 10966 based on Foata normal form. 36/23189 useless extension candidates. Maximal degree in co-relation 93676. Up to 17850 conditions per place. [2024-12-01 13:20:23,925 INFO L140 encePairwiseOnDemand]: 57/60 looper letters, 82 selfloop transitions, 2 changer transitions 1/104 dead transitions. [2024-12-01 13:20:23,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 104 transitions, 941 flow [2024-12-01 13:20:23,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-01 13:20:23,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-01 13:20:23,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 129 transitions. [2024-12-01 13:20:23,927 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7166666666666667 [2024-12-01 13:20:23,927 INFO L175 Difference]: Start difference. First operand has 133 places, 83 transitions, 595 flow. Second operand 3 states and 129 transitions. [2024-12-01 13:20:23,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 104 transitions, 941 flow [2024-12-01 13:20:24,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 104 transitions, 897 flow, removed 0 selfloop flow, removed 12 redundant places. [2024-12-01 13:20:24,192 INFO L231 Difference]: Finished difference. Result has 124 places, 83 transitions, 568 flow [2024-12-01 13:20:24,192 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=560, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=568, PETRI_PLACES=124, PETRI_TRANSITIONS=83} [2024-12-01 13:20:24,193 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 64 predicate places. [2024-12-01 13:20:24,193 INFO L471 AbstractCegarLoop]: Abstraction has has 124 places, 83 transitions, 568 flow [2024-12-01 13:20:24,193 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-01 13:20:24,193 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-01 13:20:24,193 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2024-12-01 13:20:24,193 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-12-01 13:20:24,193 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-12-01 13:20:24,194 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-01 13:20:24,194 INFO L85 PathProgramCache]: Analyzing trace with hash 973361311, now seen corresponding path program 2 times [2024-12-01 13:20:24,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-01 13:20:24,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134442797] [2024-12-01 13:20:24,194 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-01 13:20:24,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-01 13:20:24,217 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-12-01 13:20:24,217 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-01 13:20:24,582 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2024-12-01 13:20:24,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-01 13:20:24,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134442797] [2024-12-01 13:20:24,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134442797] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-01 13:20:24,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148825316] [2024-12-01 13:20:24,582 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-01 13:20:24,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 13:20:24,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-01 13:20:24,584 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-01 13:20:24,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-12-01 13:20:24,724 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-12-01 13:20:24,724 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-01 13:20:24,725 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-12-01 13:20:24,728 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-01 13:20:24,732 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 [2024-12-01 13:20:24,737 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 [2024-12-01 13:20:24,817 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-12-01 13:20:24,817 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-12-01 13:20:24,833 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-12-01 13:20:24,833 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2024-12-01 13:20:25,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-12-01 13:20:25,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-12-01 13:20:25,029 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2024-12-01 13:20:25,044 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2024-12-01 13:20:25,044 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2024-12-01 13:20:25,344 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2024-12-01 13:20:25,344 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-01 13:20:26,983 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2024-12-01 13:20:26,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148825316] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-01 13:20:26,983 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-01 13:20:26,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 12 [2024-12-01 13:20:26,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681894943] [2024-12-01 13:20:26,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-01 13:20:26,983 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-12-01 13:20:26,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-01 13:20:26,984 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-12-01 13:20:26,984 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2024-12-01 13:20:28,019 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 60 [2024-12-01 13:20:28,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 83 transitions, 568 flow. Second operand has 14 states, 14 states have (on average 24.642857142857142) internal successors, (345), 14 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-01 13:20:28,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-01 13:20:28,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 60 [2024-12-01 13:20:28,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-01 13:20:34,543 INFO L124 PetriNetUnfolderBase]: 24976/40202 cut-off events. [2024-12-01 13:20:34,543 INFO L125 PetriNetUnfolderBase]: For 159187/161498 co-relation queries the response was YES. [2024-12-01 13:20:34,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158043 conditions, 40202 events. 24976/40202 cut-off events. For 159187/161498 co-relation queries the response was YES. Maximal size of possible extension queue 1064. Compared 316362 event pairs, 11116 based on Foata normal form. 732/40094 useless extension candidates. Maximal degree in co-relation 157948. Up to 17562 conditions per place. [2024-12-01 13:20:34,864 INFO L140 encePairwiseOnDemand]: 51/60 looper letters, 101 selfloop transitions, 16 changer transitions 0/130 dead transitions. [2024-12-01 13:20:34,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 130 transitions, 1171 flow [2024-12-01 13:20:34,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-12-01 13:20:34,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-12-01 13:20:34,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 229 transitions. [2024-12-01 13:20:34,865 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47708333333333336 [2024-12-01 13:20:34,865 INFO L175 Difference]: Start difference. First operand has 124 places, 83 transitions, 568 flow. Second operand 8 states and 229 transitions. [2024-12-01 13:20:34,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 130 transitions, 1171 flow [2024-12-01 13:20:35,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 130 transitions, 1143 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-12-01 13:20:35,186 INFO L231 Difference]: Finished difference. Result has 125 places, 83 transitions, 586 flow [2024-12-01 13:20:35,186 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=538, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=586, PETRI_PLACES=125, PETRI_TRANSITIONS=83} [2024-12-01 13:20:35,187 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 65 predicate places. [2024-12-01 13:20:35,187 INFO L471 AbstractCegarLoop]: Abstraction has has 125 places, 83 transitions, 586 flow [2024-12-01 13:20:35,187 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 24.642857142857142) internal successors, (345), 14 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-01 13:20:35,187 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-01 13:20:35,187 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-01 13:20:35,194 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-12-01 13:20:35,388 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 13:20:35,388 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-12-01 13:20:35,388 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-01 13:20:35,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1470732463, now seen corresponding path program 2 times [2024-12-01 13:20:35,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-01 13:20:35,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622415562] [2024-12-01 13:20:35,388 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-01 13:20:35,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-01 13:20:35,420 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-01 13:20:35,420 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-01 13:20:35,794 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 29 proven. 4 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2024-12-01 13:20:35,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-01 13:20:35,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622415562] [2024-12-01 13:20:35,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622415562] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-01 13:20:35,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279039120] [2024-12-01 13:20:35,794 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-01 13:20:35,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 13:20:35,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-01 13:20:35,796 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-01 13:20:35,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-12-01 13:20:35,953 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-01 13:20:35,953 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-01 13:20:35,955 INFO L256 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-12-01 13:20:35,957 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-01 13:20:35,961 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 [2024-12-01 13:20:36,082 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-12-01 13:20:36,082 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 [2024-12-01 13:20:36,086 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 [2024-12-01 13:20:36,319 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-01 13:20:36,319 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-01 13:20:36,548 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 [2024-12-01 13:20:36,804 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-01 13:20:36,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279039120] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-01 13:20:36,805 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-01 13:20:36,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 13] total 35 [2024-12-01 13:20:36,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022578448] [2024-12-01 13:20:36,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-01 13:20:36,805 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-12-01 13:20:36,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-01 13:20:36,806 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-12-01 13:20:36,806 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1078, Unknown=0, NotChecked=0, Total=1260 [2024-12-01 13:20:41,567 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-01 13:20:45,848 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-01 13:20:50,743 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-01 13:20:54,982 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-12-01 13:20:54,997 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 60 [2024-12-01 13:20:54,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 83 transitions, 586 flow. Second operand has 36 states, 36 states have (on average 21.63888888888889) internal successors, (779), 36 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-01 13:20:54,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-01 13:20:54,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 60 [2024-12-01 13:20:54,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-01 13:21:01,671 INFO L124 PetriNetUnfolderBase]: 26824/39644 cut-off events. [2024-12-01 13:21:01,671 INFO L125 PetriNetUnfolderBase]: For 186809/191101 co-relation queries the response was YES. [2024-12-01 13:21:01,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151962 conditions, 39644 events. 26824/39644 cut-off events. For 186809/191101 co-relation queries the response was YES. Maximal size of possible extension queue 1040. Compared 274066 event pairs, 576 based on Foata normal form. 884/37516 useless extension candidates. Maximal degree in co-relation 151867. Up to 6202 conditions per place. [2024-12-01 13:21:01,931 INFO L140 encePairwiseOnDemand]: 49/60 looper letters, 223 selfloop transitions, 25 changer transitions 0/262 dead transitions. [2024-12-01 13:21:01,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 262 transitions, 2410 flow [2024-12-01 13:21:01,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-12-01 13:21:01,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-12-01 13:21:01,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 542 transitions. [2024-12-01 13:21:01,932 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45166666666666666 [2024-12-01 13:21:01,932 INFO L175 Difference]: Start difference. First operand has 125 places, 83 transitions, 586 flow. Second operand 20 states and 542 transitions. [2024-12-01 13:21:01,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 262 transitions, 2410 flow [2024-12-01 13:21:02,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 262 transitions, 2260 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-12-01 13:21:02,285 INFO L231 Difference]: Finished difference. Result has 134 places, 83 transitions, 585 flow [2024-12-01 13:21:02,286 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=528, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=585, PETRI_PLACES=134, PETRI_TRANSITIONS=83} [2024-12-01 13:21:02,286 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 74 predicate places. [2024-12-01 13:21:02,286 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 83 transitions, 585 flow [2024-12-01 13:21:02,286 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 21.63888888888889) internal successors, (779), 36 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-01 13:21:02,286 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-01 13:21:02,286 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-01 13:21:02,293 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-12-01 13:21:02,487 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 13:21:02,487 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-12-01 13:21:02,487 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-01 13:21:02,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1134296666, now seen corresponding path program 1 times [2024-12-01 13:21:02,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-01 13:21:02,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016484237] [2024-12-01 13:21:02,488 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-01 13:21:02,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-01 13:21:02,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-01 13:21:02,666 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-12-01 13:21:02,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-01 13:21:02,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016484237] [2024-12-01 13:21:02,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016484237] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-01 13:21:02,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711413746] [2024-12-01 13:21:02,666 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-01 13:21:02,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 13:21:02,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-01 13:21:02,668 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-01 13:21:02,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-12-01 13:21:02,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-01 13:21:02,841 INFO L256 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-12-01 13:21:02,843 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-01 13:21:03,008 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-12-01 13:21:03,008 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-01 13:21:03,131 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-12-01 13:21:03,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711413746] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-01 13:21:03,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-01 13:21:03,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 6] total 15 [2024-12-01 13:21:03,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70234745] [2024-12-01 13:21:03,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-01 13:21:03,131 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-12-01 13:21:03,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-01 13:21:03,132 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-12-01 13:21:03,132 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2024-12-01 13:21:03,216 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 60 [2024-12-01 13:21:03,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 83 transitions, 585 flow. Second operand has 15 states, 15 states have (on average 30.466666666666665) internal successors, (457), 15 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-01 13:21:03,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-01 13:21:03,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 60 [2024-12-01 13:21:03,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-01 13:21:10,907 INFO L124 PetriNetUnfolderBase]: 31964/53993 cut-off events. [2024-12-01 13:21:10,908 INFO L125 PetriNetUnfolderBase]: For 215409/220421 co-relation queries the response was YES. [2024-12-01 13:21:11,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192456 conditions, 53993 events. 31964/53993 cut-off events. For 215409/220421 co-relation queries the response was YES. Maximal size of possible extension queue 1306. Compared 454397 event pairs, 1176 based on Foata normal form. 512/50303 useless extension candidates. Maximal degree in co-relation 192360. Up to 18650 conditions per place. [2024-12-01 13:21:11,256 INFO L140 encePairwiseOnDemand]: 51/60 looper letters, 240 selfloop transitions, 71 changer transitions 1/328 dead transitions. [2024-12-01 13:21:11,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 328 transitions, 2964 flow [2024-12-01 13:21:11,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-12-01 13:21:11,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-12-01 13:21:11,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 657 transitions. [2024-12-01 13:21:11,259 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6083333333333333 [2024-12-01 13:21:11,259 INFO L175 Difference]: Start difference. First operand has 134 places, 83 transitions, 585 flow. Second operand 18 states and 657 transitions. [2024-12-01 13:21:11,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 328 transitions, 2964 flow [2024-12-01 13:21:11,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 328 transitions, 2853 flow, removed 6 selfloop flow, removed 13 redundant places. [2024-12-01 13:21:11,947 INFO L231 Difference]: Finished difference. Result has 142 places, 148 transitions, 1226 flow [2024-12-01 13:21:11,947 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=557, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1226, PETRI_PLACES=142, PETRI_TRANSITIONS=148} [2024-12-01 13:21:11,947 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 82 predicate places. [2024-12-01 13:21:11,947 INFO L471 AbstractCegarLoop]: Abstraction has has 142 places, 148 transitions, 1226 flow [2024-12-01 13:21:11,948 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 30.466666666666665) internal successors, (457), 15 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-01 13:21:11,948 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-01 13:21:11,948 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-01 13:21:11,955 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-12-01 13:21:12,148 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 13:21:12,148 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-12-01 13:21:12,149 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-01 13:21:12,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1757197350, now seen corresponding path program 2 times [2024-12-01 13:21:12,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-01 13:21:12,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237411375] [2024-12-01 13:21:12,149 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-01 13:21:12,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-01 13:21:12,180 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-12-01 13:21:12,180 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-01 13:21:12,282 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2024-12-01 13:21:12,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-01 13:21:12,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237411375] [2024-12-01 13:21:12,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237411375] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-01 13:21:12,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-01 13:21:12,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-01 13:21:12,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396458133] [2024-12-01 13:21:12,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-01 13:21:12,283 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-01 13:21:12,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-01 13:21:12,283 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-01 13:21:12,283 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-12-01 13:21:12,291 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 60 [2024-12-01 13:21:12,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 148 transitions, 1226 flow. Second operand has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-01 13:21:12,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-01 13:21:12,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 60 [2024-12-01 13:21:12,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-01 13:21:19,547 INFO L124 PetriNetUnfolderBase]: 22855/42039 cut-off events. [2024-12-01 13:21:19,547 INFO L125 PetriNetUnfolderBase]: For 233832/237758 co-relation queries the response was YES. [2024-12-01 13:21:19,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176373 conditions, 42039 events. 22855/42039 cut-off events. For 233832/237758 co-relation queries the response was YES. Maximal size of possible extension queue 1190. Compared 387132 event pairs, 11476 based on Foata normal form. 65/40513 useless extension candidates. Maximal degree in co-relation 176272. Up to 26574 conditions per place. [2024-12-01 13:21:20,057 INFO L140 encePairwiseOnDemand]: 56/60 looper letters, 234 selfloop transitions, 3 changer transitions 0/277 dead transitions. [2024-12-01 13:21:20,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 277 transitions, 3055 flow [2024-12-01 13:21:20,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-01 13:21:20,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-01 13:21:20,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 173 transitions. [2024-12-01 13:21:20,059 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7208333333333333 [2024-12-01 13:21:20,059 INFO L175 Difference]: Start difference. First operand has 142 places, 148 transitions, 1226 flow. Second operand 4 states and 173 transitions. [2024-12-01 13:21:20,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 277 transitions, 3055 flow [2024-12-01 13:21:21,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 277 transitions, 3013 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-12-01 13:21:21,241 INFO L231 Difference]: Finished difference. Result has 144 places, 149 transitions, 1232 flow [2024-12-01 13:21:21,241 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1206, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1232, PETRI_PLACES=144, PETRI_TRANSITIONS=149} [2024-12-01 13:21:21,242 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 84 predicate places. [2024-12-01 13:21:21,242 INFO L471 AbstractCegarLoop]: Abstraction has has 144 places, 149 transitions, 1232 flow [2024-12-01 13:21:21,242 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-01 13:21:21,242 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-01 13:21:21,242 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-01 13:21:21,242 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-12-01 13:21:21,242 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-12-01 13:21:21,243 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-01 13:21:21,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1410942848, now seen corresponding path program 3 times [2024-12-01 13:21:21,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-01 13:21:21,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988306662] [2024-12-01 13:21:21,243 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-01 13:21:21,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-01 13:21:21,263 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-12-01 13:21:21,263 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-01 13:21:21,327 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2024-12-01 13:21:21,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-01 13:21:21,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988306662] [2024-12-01 13:21:21,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988306662] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-01 13:21:21,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-01 13:21:21,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-01 13:21:21,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386954276] [2024-12-01 13:21:21,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-01 13:21:21,328 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-01 13:21:21,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-01 13:21:21,328 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-01 13:21:21,328 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-01 13:21:21,336 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 60 [2024-12-01 13:21:21,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 149 transitions, 1232 flow. Second operand has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-01 13:21:21,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-01 13:21:21,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 60 [2024-12-01 13:21:21,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-01 13:21:28,571 INFO L124 PetriNetUnfolderBase]: 24083/46572 cut-off events. [2024-12-01 13:21:28,571 INFO L125 PetriNetUnfolderBase]: For 247302/251778 co-relation queries the response was YES. [2024-12-01 13:21:28,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 194195 conditions, 46572 events. 24083/46572 cut-off events. For 247302/251778 co-relation queries the response was YES. Maximal size of possible extension queue 1260. Compared 452563 event pairs, 4112 based on Foata normal form. 650/46304 useless extension candidates. Maximal degree in co-relation 194092. Up to 29196 conditions per place. [2024-12-01 13:21:28,970 INFO L140 encePairwiseOnDemand]: 54/60 looper letters, 178 selfloop transitions, 10 changer transitions 0/228 dead transitions. [2024-12-01 13:21:28,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 228 transitions, 2413 flow [2024-12-01 13:21:28,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-01 13:21:28,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-01 13:21:28,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 165 transitions. [2024-12-01 13:21:28,971 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6875 [2024-12-01 13:21:28,971 INFO L175 Difference]: Start difference. First operand has 144 places, 149 transitions, 1232 flow. Second operand 4 states and 165 transitions. [2024-12-01 13:21:28,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 228 transitions, 2413 flow [2024-12-01 13:21:30,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 228 transitions, 2403 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-12-01 13:21:30,771 INFO L231 Difference]: Finished difference. Result has 147 places, 151 transitions, 1283 flow [2024-12-01 13:21:30,771 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1228, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1283, PETRI_PLACES=147, PETRI_TRANSITIONS=151} [2024-12-01 13:21:30,772 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 87 predicate places. [2024-12-01 13:21:30,772 INFO L471 AbstractCegarLoop]: Abstraction has has 147 places, 151 transitions, 1283 flow [2024-12-01 13:21:30,772 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-01 13:21:30,772 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-01 13:21:30,772 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-01 13:21:30,772 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-12-01 13:21:30,772 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-12-01 13:21:30,773 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-01 13:21:30,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1208996302, now seen corresponding path program 4 times [2024-12-01 13:21:30,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-01 13:21:30,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288590063] [2024-12-01 13:21:30,773 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-01 13:21:30,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-01 13:21:30,808 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-01 13:21:30,808 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-01 13:21:31,031 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-12-01 13:21:31,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-01 13:21:31,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288590063] [2024-12-01 13:21:31,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288590063] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-01 13:21:31,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-01 13:21:31,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-01 13:21:31,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988618186] [2024-12-01 13:21:31,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-01 13:21:31,032 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-01 13:21:31,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-01 13:21:31,032 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-01 13:21:31,032 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-12-01 13:21:31,049 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 60 [2024-12-01 13:21:31,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 151 transitions, 1283 flow. Second operand has 5 states, 5 states have (on average 33.6) internal successors, (168), 5 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-01 13:21:31,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-01 13:21:31,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 60 [2024-12-01 13:21:31,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-01 13:21:39,742 INFO L124 PetriNetUnfolderBase]: 30146/51672 cut-off events. [2024-12-01 13:21:39,742 INFO L125 PetriNetUnfolderBase]: For 290096/296613 co-relation queries the response was YES. [2024-12-01 13:21:40,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219371 conditions, 51672 events. 30146/51672 cut-off events. For 290096/296613 co-relation queries the response was YES. Maximal size of possible extension queue 1310. Compared 445022 event pairs, 16298 based on Foata normal form. 40/51199 useless extension candidates. Maximal degree in co-relation 219265. Up to 33671 conditions per place. [2024-12-01 13:21:40,187 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 159 selfloop transitions, 17 changer transitions 18/226 dead transitions. [2024-12-01 13:21:40,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 226 transitions, 2247 flow [2024-12-01 13:21:40,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-01 13:21:40,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-01 13:21:40,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 206 transitions. [2024-12-01 13:21:40,188 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6866666666666666 [2024-12-01 13:21:40,188 INFO L175 Difference]: Start difference. First operand has 147 places, 151 transitions, 1283 flow. Second operand 5 states and 206 transitions. [2024-12-01 13:21:40,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 226 transitions, 2247 flow [2024-12-01 13:21:41,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 226 transitions, 2239 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-12-01 13:21:41,521 INFO L231 Difference]: Finished difference. Result has 153 places, 152 transitions, 1343 flow [2024-12-01 13:21:41,521 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1275, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1343, PETRI_PLACES=153, PETRI_TRANSITIONS=152} [2024-12-01 13:21:41,521 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 93 predicate places. [2024-12-01 13:21:41,521 INFO L471 AbstractCegarLoop]: Abstraction has has 153 places, 152 transitions, 1343 flow [2024-12-01 13:21:41,521 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 5 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-01 13:21:41,521 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-01 13:21:41,521 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-01 13:21:41,521 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-12-01 13:21:41,522 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-12-01 13:21:41,522 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-01 13:21:41,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1236015668, now seen corresponding path program 5 times [2024-12-01 13:21:41,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-01 13:21:41,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757668607] [2024-12-01 13:21:41,522 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-01 13:21:41,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-01 13:21:41,553 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-12-01 13:21:41,553 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-01 13:21:41,783 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-12-01 13:21:41,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-01 13:21:41,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757668607] [2024-12-01 13:21:41,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757668607] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-01 13:21:41,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-01 13:21:41,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-01 13:21:41,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215181788] [2024-12-01 13:21:41,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-01 13:21:41,784 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-01 13:21:41,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-01 13:21:41,784 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-01 13:21:41,784 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-12-01 13:21:41,804 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 60 [2024-12-01 13:21:41,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 152 transitions, 1343 flow. Second operand has 5 states, 5 states have (on average 32.6) internal successors, (163), 5 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-01 13:21:41,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-01 13:21:41,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 60 [2024-12-01 13:21:41,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-01 13:21:51,999 INFO L124 PetriNetUnfolderBase]: 36323/62624 cut-off events. [2024-12-01 13:21:51,999 INFO L125 PetriNetUnfolderBase]: For 347554/354342 co-relation queries the response was YES. [2024-12-01 13:21:52,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 271749 conditions, 62624 events. 36323/62624 cut-off events. For 347554/354342 co-relation queries the response was YES. Maximal size of possible extension queue 1501. Compared 547710 event pairs, 19588 based on Foata normal form. 544/62790 useless extension candidates. Maximal degree in co-relation 271640. Up to 38620 conditions per place. [2024-12-01 13:21:52,657 INFO L140 encePairwiseOnDemand]: 54/60 looper letters, 198 selfloop transitions, 29 changer transitions 1/244 dead transitions. [2024-12-01 13:21:52,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 244 transitions, 2486 flow [2024-12-01 13:21:52,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-01 13:21:52,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-01 13:21:52,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 210 transitions. [2024-12-01 13:21:52,658 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7 [2024-12-01 13:21:52,658 INFO L175 Difference]: Start difference. First operand has 153 places, 152 transitions, 1343 flow. Second operand 5 states and 210 transitions. [2024-12-01 13:21:52,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 244 transitions, 2486 flow [2024-12-01 13:21:55,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 244 transitions, 2440 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-12-01 13:21:55,012 INFO L231 Difference]: Finished difference. Result has 156 places, 161 transitions, 1479 flow [2024-12-01 13:21:55,012 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1301, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1479, PETRI_PLACES=156, PETRI_TRANSITIONS=161} [2024-12-01 13:21:55,013 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 96 predicate places. [2024-12-01 13:21:55,013 INFO L471 AbstractCegarLoop]: Abstraction has has 156 places, 161 transitions, 1479 flow [2024-12-01 13:21:55,013 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.6) internal successors, (163), 5 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-01 13:21:55,013 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-01 13:21:55,013 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-01 13:21:55,013 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-12-01 13:21:55,013 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-12-01 13:21:55,014 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-01 13:21:55,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1489330286, now seen corresponding path program 6 times [2024-12-01 13:21:55,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-01 13:21:55,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259582082] [2024-12-01 13:21:55,014 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-01 13:21:55,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-01 13:21:55,034 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-12-01 13:21:55,035 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-01 13:21:55,112 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2024-12-01 13:21:55,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-01 13:21:55,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259582082] [2024-12-01 13:21:55,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259582082] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-01 13:21:55,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-01 13:21:55,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-01 13:21:55,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937618309] [2024-12-01 13:21:55,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-01 13:21:55,113 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-01 13:21:55,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-01 13:21:55,113 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-01 13:21:55,113 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-01 13:21:55,123 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 60 [2024-12-01 13:21:55,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 161 transitions, 1479 flow. Second operand has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-01 13:21:55,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-01 13:21:55,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 60 [2024-12-01 13:21:55,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-01 13:22:05,982 INFO L124 PetriNetUnfolderBase]: 38574/64508 cut-off events. [2024-12-01 13:22:05,982 INFO L125 PetriNetUnfolderBase]: For 423276/432779 co-relation queries the response was YES. [2024-12-01 13:22:06,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 293895 conditions, 64508 events. 38574/64508 cut-off events. For 423276/432779 co-relation queries the response was YES. Maximal size of possible extension queue 1719. Compared 558529 event pairs, 20742 based on Foata normal form. 585/61805 useless extension candidates. Maximal degree in co-relation 293784. Up to 46174 conditions per place. [2024-12-01 13:22:06,608 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 241 selfloop transitions, 11 changer transitions 0/297 dead transitions. [2024-12-01 13:22:06,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 297 transitions, 3612 flow [2024-12-01 13:22:06,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-01 13:22:06,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-01 13:22:06,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 170 transitions. [2024-12-01 13:22:06,609 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7083333333333334 [2024-12-01 13:22:06,609 INFO L175 Difference]: Start difference. First operand has 156 places, 161 transitions, 1479 flow. Second operand 4 states and 170 transitions. [2024-12-01 13:22:06,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 297 transitions, 3612 flow [2024-12-01 13:22:08,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 297 transitions, 3598 flow, removed 7 selfloop flow, removed 0 redundant places. [2024-12-01 13:22:08,637 INFO L231 Difference]: Finished difference. Result has 161 places, 168 transitions, 1637 flow [2024-12-01 13:22:08,637 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1465, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1637, PETRI_PLACES=161, PETRI_TRANSITIONS=168} [2024-12-01 13:22:08,637 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 101 predicate places. [2024-12-01 13:22:08,637 INFO L471 AbstractCegarLoop]: Abstraction has has 161 places, 168 transitions, 1637 flow [2024-12-01 13:22:08,637 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-01 13:22:08,637 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-01 13:22:08,637 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-01 13:22:08,638 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-12-01 13:22:08,638 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-12-01 13:22:08,638 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-01 13:22:08,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1382914167, now seen corresponding path program 2 times [2024-12-01 13:22:08,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-01 13:22:08,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217349478] [2024-12-01 13:22:08,639 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-01 13:22:08,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-01 13:22:08,672 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-01 13:22:08,672 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-01 13:22:09,036 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-12-01 13:22:09,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-01 13:22:09,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217349478] [2024-12-01 13:22:09,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217349478] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-01 13:22:09,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922289009] [2024-12-01 13:22:09,036 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-01 13:22:09,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 13:22:09,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-01 13:22:09,038 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-01 13:22:09,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-12-01 13:22:09,242 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-01 13:22:09,242 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-01 13:22:09,244 INFO L256 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-12-01 13:22:09,246 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-01 13:22:09,251 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 [2024-12-01 13:22:09,254 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 [2024-12-01 13:22:09,329 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-12-01 13:22:09,330 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-12-01 13:22:09,354 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-12-01 13:22:09,354 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2024-12-01 13:22:09,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-12-01 13:22:09,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-12-01 13:22:09,669 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2024-12-01 13:22:09,681 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2024-12-01 13:22:09,682 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2024-12-01 13:22:10,170 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-01 13:22:10,170 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-01 13:22:11,093 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-01 13:22:11,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922289009] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-01 13:22:11,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-01 13:22:11,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14, 13] total 36 [2024-12-01 13:22:11,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751648545] [2024-12-01 13:22:11,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-01 13:22:11,093 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-12-01 13:22:11,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-01 13:22:11,094 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-12-01 13:22:11,094 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=1162, Unknown=0, NotChecked=0, Total=1406 [2024-12-01 13:22:13,138 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 60 [2024-12-01 13:22:13,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 168 transitions, 1637 flow. Second operand has 38 states, 38 states have (on average 22.789473684210527) internal successors, (866), 38 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-01 13:22:13,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-01 13:22:13,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 60 [2024-12-01 13:22:13,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-01 13:22:27,983 INFO L124 PetriNetUnfolderBase]: 56020/85985 cut-off events. [2024-12-01 13:22:27,983 INFO L125 PetriNetUnfolderBase]: For 520398/524987 co-relation queries the response was YES. [2024-12-01 13:22:28,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 374351 conditions, 85985 events. 56020/85985 cut-off events. For 520398/524987 co-relation queries the response was YES. Maximal size of possible extension queue 1668. Compared 662084 event pairs, 2098 based on Foata normal form. 2219/87312 useless extension candidates. Maximal degree in co-relation 374237. Up to 12980 conditions per place. [2024-12-01 13:22:28,817 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 307 selfloop transitions, 29 changer transitions 1/370 dead transitions. [2024-12-01 13:22:28,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 370 transitions, 4109 flow [2024-12-01 13:22:28,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-12-01 13:22:28,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-12-01 13:22:28,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 569 transitions. [2024-12-01 13:22:28,819 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4515873015873016 [2024-12-01 13:22:28,819 INFO L175 Difference]: Start difference. First operand has 161 places, 168 transitions, 1637 flow. Second operand 21 states and 569 transitions. [2024-12-01 13:22:28,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 370 transitions, 4109 flow [2024-12-01 13:22:31,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 370 transitions, 4021 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-12-01 13:22:31,056 INFO L231 Difference]: Finished difference. Result has 176 places, 170 transitions, 1660 flow [2024-12-01 13:22:31,056 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1579, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1660, PETRI_PLACES=176, PETRI_TRANSITIONS=170} [2024-12-01 13:22:31,056 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 116 predicate places. [2024-12-01 13:22:31,057 INFO L471 AbstractCegarLoop]: Abstraction has has 176 places, 170 transitions, 1660 flow [2024-12-01 13:22:31,057 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 22.789473684210527) internal successors, (866), 38 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-01 13:22:31,057 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-01 13:22:31,057 INFO L206 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-01 13:22:31,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-12-01 13:22:31,257 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 13:22:31,257 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-12-01 13:22:31,258 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-01 13:22:31,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1001836598, now seen corresponding path program 2 times [2024-12-01 13:22:31,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-01 13:22:31,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497746688] [2024-12-01 13:22:31,258 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-01 13:22:31,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-01 13:22:31,277 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-12-01 13:22:31,277 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-01 13:22:31,393 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2024-12-01 13:22:31,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-01 13:22:31,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497746688] [2024-12-01 13:22:31,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497746688] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-01 13:22:31,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217858393] [2024-12-01 13:22:31,393 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-01 13:22:31,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 13:22:31,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-01 13:22:31,395 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-01 13:22:31,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-12-01 13:22:31,660 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-12-01 13:22:31,660 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-01 13:22:31,661 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-12-01 13:22:31,663 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-01 13:22:31,667 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 [2024-12-01 13:22:31,672 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 [2024-12-01 13:22:31,751 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-12-01 13:22:31,751 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-12-01 13:22:31,765 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-12-01 13:22:31,765 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 [2024-12-01 13:22:32,081 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2024-12-01 13:22:32,081 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-01 13:22:33,097 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2024-12-01 13:22:33,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217858393] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-01 13:22:33,097 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-01 13:22:33,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2024-12-01 13:22:33,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290982596] [2024-12-01 13:22:33,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-01 13:22:33,097 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-12-01 13:22:33,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-01 13:22:33,098 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-12-01 13:22:33,098 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2024-12-01 13:22:34,101 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 60 [2024-12-01 13:22:34,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 170 transitions, 1660 flow. Second operand has 15 states, 15 states have (on average 26.466666666666665) internal successors, (397), 15 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-01 13:22:34,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-01 13:22:34,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 60 [2024-12-01 13:22:34,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-01 13:22:43,398 INFO L124 PetriNetUnfolderBase]: 37731/59089 cut-off events. [2024-12-01 13:22:43,399 INFO L125 PetriNetUnfolderBase]: For 336757/343834 co-relation queries the response was YES. [2024-12-01 13:22:43,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 255674 conditions, 59089 events. 37731/59089 cut-off events. For 336757/343834 co-relation queries the response was YES. Maximal size of possible extension queue 1351. Compared 459042 event pairs, 9150 based on Foata normal form. 1118/58371 useless extension candidates. Maximal degree in co-relation 255560. Up to 20505 conditions per place. [2024-12-01 13:22:43,959 INFO L140 encePairwiseOnDemand]: 51/60 looper letters, 144 selfloop transitions, 72 changer transitions 0/240 dead transitions. [2024-12-01 13:22:43,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 240 transitions, 2699 flow [2024-12-01 13:22:43,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-12-01 13:22:43,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-12-01 13:22:43,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 275 transitions. [2024-12-01 13:22:43,961 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5092592592592593 [2024-12-01 13:22:43,961 INFO L175 Difference]: Start difference. First operand has 176 places, 170 transitions, 1660 flow. Second operand 9 states and 275 transitions. [2024-12-01 13:22:43,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 240 transitions, 2699 flow [2024-12-01 13:22:45,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 240 transitions, 2495 flow, removed 4 selfloop flow, removed 28 redundant places. [2024-12-01 13:22:45,693 INFO L231 Difference]: Finished difference. Result has 156 places, 173 transitions, 1739 flow [2024-12-01 13:22:45,693 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1490, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1739, PETRI_PLACES=156, PETRI_TRANSITIONS=173} [2024-12-01 13:22:45,693 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 96 predicate places. [2024-12-01 13:22:45,693 INFO L471 AbstractCegarLoop]: Abstraction has has 156 places, 173 transitions, 1739 flow [2024-12-01 13:22:45,694 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 26.466666666666665) internal successors, (397), 15 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-01 13:22:45,694 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-01 13:22:45,694 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-01 13:22:45,700 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-12-01 13:22:45,894 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6efcae6c-e61b-4acd-9c87-ced7a7559a7e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 13:22:45,894 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-12-01 13:22:45,895 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-01 13:22:45,895 INFO L85 PathProgramCache]: Analyzing trace with hash -760292325, now seen corresponding path program 1 times [2024-12-01 13:22:45,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-01 13:22:45,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738193395] [2024-12-01 13:22:45,895 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-01 13:22:45,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-01 13:22:45,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-01 13:22:46,330 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2024-12-01 13:22:46,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-01 13:22:46,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738193395] [2024-12-01 13:22:46,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738193395] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-01 13:22:46,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-01 13:22:46,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-01 13:22:46,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769953518] [2024-12-01 13:22:46,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-01 13:22:46,331 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-01 13:22:46,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-01 13:22:46,332 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-01 13:22:46,332 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-12-01 13:22:46,353 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 60 [2024-12-01 13:22:46,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 173 transitions, 1739 flow. Second operand has 5 states, 5 states have (on average 33.8) internal successors, (169), 5 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-01 13:22:46,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-01 13:22:46,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 60 [2024-12-01 13:22:46,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-01 13:22:53,636 INFO L124 PetriNetUnfolderBase]: 26982/46362 cut-off events. [2024-12-01 13:22:53,636 INFO L125 PetriNetUnfolderBase]: For 268080/273117 co-relation queries the response was YES. [2024-12-01 13:22:53,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 202829 conditions, 46362 events. 26982/46362 cut-off events. For 268080/273117 co-relation queries the response was YES. Maximal size of possible extension queue 1193. Compared 396431 event pairs, 13026 based on Foata normal form. 140/45430 useless extension candidates. Maximal degree in co-relation 202726. Up to 28074 conditions per place. [2024-12-01 13:22:54,243 INFO L140 encePairwiseOnDemand]: 54/60 looper letters, 156 selfloop transitions, 29 changer transitions 12/239 dead transitions. [2024-12-01 13:22:54,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 239 transitions, 2650 flow [2024-12-01 13:22:54,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-01 13:22:54,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-01 13:22:54,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 205 transitions. [2024-12-01 13:22:54,244 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6833333333333333 [2024-12-01 13:22:54,244 INFO L175 Difference]: Start difference. First operand has 156 places, 173 transitions, 1739 flow. Second operand 5 states and 205 transitions. [2024-12-01 13:22:54,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 239 transitions, 2650 flow [2024-12-01 13:22:55,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 239 transitions, 2446 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-12-01 13:22:55,168 INFO L231 Difference]: Finished difference. Result has 155 places, 179 transitions, 1711 flow [2024-12-01 13:22:55,168 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1543, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1711, PETRI_PLACES=155, PETRI_TRANSITIONS=179} [2024-12-01 13:22:55,168 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 95 predicate places. [2024-12-01 13:22:55,168 INFO L471 AbstractCegarLoop]: Abstraction has has 155 places, 179 transitions, 1711 flow [2024-12-01 13:22:55,168 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.8) internal successors, (169), 5 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-01 13:22:55,168 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-01 13:22:55,168 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-01 13:22:55,168 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-12-01 13:22:55,169 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-12-01 13:22:55,169 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-01 13:22:55,169 INFO L85 PathProgramCache]: Analyzing trace with hash 725091755, now seen corresponding path program 2 times [2024-12-01 13:22:55,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-01 13:22:55,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101391093] [2024-12-01 13:22:55,170 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-01 13:22:55,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-01 13:22:55,196 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-01 13:22:55,196 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-01 13:22:55,361 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2024-12-01 13:22:55,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-01 13:22:55,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101391093] [2024-12-01 13:22:55,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101391093] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-01 13:22:55,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-01 13:22:55,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-01 13:22:55,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577578718] [2024-12-01 13:22:55,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-01 13:22:55,362 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-01 13:22:55,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-01 13:22:55,362 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-01 13:22:55,362 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-12-01 13:22:55,377 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 60 [2024-12-01 13:22:55,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 179 transitions, 1711 flow. Second operand has 5 states, 5 states have (on average 33.8) internal successors, (169), 5 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-01 13:22:55,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-01 13:22:55,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 60 [2024-12-01 13:22:55,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand