./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-complex/safestack_relacy.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c96e85d-c79f-4ecb-a103-8f9144355b90/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c96e85d-c79f-4ecb-a103-8f9144355b90/bin/uautomizer-verify-4GaUIPS5ZU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c96e85d-c79f-4ecb-a103-8f9144355b90/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c96e85d-c79f-4ecb-a103-8f9144355b90/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-complex/safestack_relacy.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c96e85d-c79f-4ecb-a103-8f9144355b90/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c96e85d-c79f-4ecb-a103-8f9144355b90/bin/uautomizer-verify-4GaUIPS5ZU --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 516fee84c55ddb7fa4275a43ad5a2da6ea994abf63bbbbd8ed5c82108d65f7b0 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 22:02:32,547 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 22:02:32,646 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c96e85d-c79f-4ecb-a103-8f9144355b90/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-31 22:02:32,651 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 22:02:32,652 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 22:02:32,688 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 22:02:32,688 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 22:02:32,690 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 22:02:32,691 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 22:02:32,691 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 22:02:32,692 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 22:02:32,692 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 22:02:32,693 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 22:02:32,693 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 22:02:32,693 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 22:02:32,694 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 22:02:32,695 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 22:02:32,695 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 22:02:32,696 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 22:02:32,696 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 22:02:32,696 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-31 22:02:32,697 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-31 22:02:32,698 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-31 22:02:32,698 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 22:02:32,698 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-31 22:02:32,699 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 22:02:32,699 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-31 22:02:32,700 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 22:02:32,700 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 22:02:32,701 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 22:02:32,701 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 22:02:32,701 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 22:02:32,702 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 22:02:32,702 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:02:32,702 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 22:02:32,703 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 22:02:32,703 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 22:02:32,703 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 22:02:32,704 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 22:02:32,704 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 22:02:32,705 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 22:02:32,705 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 22:02:32,705 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c96e85d-c79f-4ecb-a103-8f9144355b90/bin/uautomizer-verify-4GaUIPS5ZU/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c96e85d-c79f-4ecb-a103-8f9144355b90/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 516fee84c55ddb7fa4275a43ad5a2da6ea994abf63bbbbd8ed5c82108d65f7b0 [2024-10-31 22:02:33,079 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 22:02:33,113 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 22:02:33,117 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 22:02:33,119 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 22:02:33,119 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 22:02:33,121 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c96e85d-c79f-4ecb-a103-8f9144355b90/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/pthread-complex/safestack_relacy.i Unable to find full path for "g++" [2024-10-31 22:02:35,229 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 22:02:35,583 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 22:02:35,584 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c96e85d-c79f-4ecb-a103-8f9144355b90/sv-benchmarks/c/pthread-complex/safestack_relacy.i [2024-10-31 22:02:35,616 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c96e85d-c79f-4ecb-a103-8f9144355b90/bin/uautomizer-verify-4GaUIPS5ZU/data/aeb795158/7b7a13f963b04276ac13025e4c15d59a/FLAG285c75b5e [2024-10-31 22:02:35,640 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c96e85d-c79f-4ecb-a103-8f9144355b90/bin/uautomizer-verify-4GaUIPS5ZU/data/aeb795158/7b7a13f963b04276ac13025e4c15d59a [2024-10-31 22:02:35,643 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 22:02:35,644 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 22:02:35,646 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 22:02:35,647 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 22:02:35,654 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 22:02:35,655 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:02:35" (1/1) ... [2024-10-31 22:02:35,656 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57ece6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:02:35, skipping insertion in model container [2024-10-31 22:02:35,656 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:02:35" (1/1) ... [2024-10-31 22:02:35,733 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 22:02:36,573 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:02:36,585 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 22:02:36,719 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:02:36,874 INFO L204 MainTranslator]: Completed translation [2024-10-31 22:02:36,875 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:02:36 WrapperNode [2024-10-31 22:02:36,875 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 22:02:36,877 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 22:02:36,877 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 22:02:36,878 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 22:02:36,886 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:02:36" (1/1) ... [2024-10-31 22:02:36,928 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:02:36" (1/1) ... [2024-10-31 22:02:36,975 INFO L138 Inliner]: procedures = 458, calls = 48, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 177 [2024-10-31 22:02:36,976 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 22:02:36,977 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 22:02:36,977 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 22:02:36,977 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 22:02:36,991 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:02:36" (1/1) ... [2024-10-31 22:02:36,992 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:02:36" (1/1) ... [2024-10-31 22:02:37,000 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:02:36" (1/1) ... [2024-10-31 22:02:37,026 INFO L175 MemorySlicer]: Split 37 memory accesses to 3 slices as follows [2, 5, 30]. 81 percent of accesses are in the largest equivalence class. The 13 initializations are split as follows [2, 3, 8]. The 13 writes are split as follows [0, 1, 12]. [2024-10-31 22:02:37,026 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:02:36" (1/1) ... [2024-10-31 22:02:37,026 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:02:36" (1/1) ... [2024-10-31 22:02:37,047 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:02:36" (1/1) ... [2024-10-31 22:02:37,054 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:02:36" (1/1) ... [2024-10-31 22:02:37,063 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:02:36" (1/1) ... [2024-10-31 22:02:37,069 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:02:36" (1/1) ... [2024-10-31 22:02:37,081 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 22:02:37,082 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 22:02:37,082 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 22:02:37,082 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 22:02:37,083 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:02:36" (1/1) ... [2024-10-31 22:02:37,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:02:37,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c96e85d-c79f-4ecb-a103-8f9144355b90/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:02:37,128 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c96e85d-c79f-4ecb-a103-8f9144355b90/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 22:02:37,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c96e85d-c79f-4ecb-a103-8f9144355b90/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 22:02:37,165 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-31 22:02:37,165 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-31 22:02:37,165 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-31 22:02:37,165 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 22:02:37,165 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2024-10-31 22:02:37,166 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2024-10-31 22:02:37,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 22:02:37,166 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 22:02:37,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-31 22:02:37,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-31 22:02:37,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-31 22:02:37,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 22:02:37,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-31 22:02:37,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-31 22:02:37,171 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-31 22:02:37,542 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 22:02:37,545 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 22:02:37,993 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-31 22:02:37,993 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 22:02:38,225 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 22:02:38,225 INFO L316 CfgBuilder]: Removed 7 assume(true) statements. [2024-10-31 22:02:38,226 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:02:38 BoogieIcfgContainer [2024-10-31 22:02:38,226 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 22:02:38,228 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 22:02:38,228 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 22:02:38,231 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 22:02:38,232 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 10:02:35" (1/3) ... [2024-10-31 22:02:38,233 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f957d93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:02:38, skipping insertion in model container [2024-10-31 22:02:38,233 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:02:36" (2/3) ... [2024-10-31 22:02:38,234 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f957d93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:02:38, skipping insertion in model container [2024-10-31 22:02:38,235 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:02:38" (3/3) ... [2024-10-31 22:02:38,236 INFO L112 eAbstractionObserver]: Analyzing ICFG safestack_relacy.i [2024-10-31 22:02:38,253 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 22:02:38,253 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 50 error locations. [2024-10-31 22:02:38,254 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-31 22:02:38,336 INFO L143 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-10-31 22:02:38,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 117 transitions, 241 flow [2024-10-31 22:02:38,452 INFO L124 PetriNetUnfolderBase]: 13/129 cut-off events. [2024-10-31 22:02:38,452 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-31 22:02:38,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134 conditions, 129 events. 13/129 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 476 event pairs, 0 based on Foata normal form. 0/58 useless extension candidates. Maximal degree in co-relation 95. Up to 3 conditions per place. [2024-10-31 22:02:38,458 INFO L82 GeneralOperation]: Start removeDead. Operand has 107 places, 117 transitions, 241 flow [2024-10-31 22:02:38,464 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 107 places, 117 transitions, 241 flow [2024-10-31 22:02:38,478 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:02:38,484 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;@7d900230, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:02:38,484 INFO L334 AbstractCegarLoop]: Starting to check reachability of 88 error locations. [2024-10-31 22:02:38,487 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-31 22:02:38,487 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-10-31 22:02:38,487 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-31 22:02:38,487 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:02:38,488 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-10-31 22:02:38,488 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 85 more)] === [2024-10-31 22:02:38,493 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:02:38,494 INFO L85 PathProgramCache]: Analyzing trace with hash 18708, now seen corresponding path program 1 times [2024-10-31 22:02:38,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:02:38,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308567806] [2024-10-31 22:02:38,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:02:38,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:02:38,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:39,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:02:39,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:02:39,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308567806] [2024-10-31 22:02:39,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308567806] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:02:39,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:02:39,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-31 22:02:39,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389497445] [2024-10-31 22:02:39,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:02:39,025 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:02:39,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:02:39,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:02:39,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:02:39,117 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 117 [2024-10-31 22:02:39,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 117 transitions, 241 flow. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:39,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:02:39,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 117 [2024-10-31 22:02:39,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:02:39,485 INFO L124 PetriNetUnfolderBase]: 223/549 cut-off events. [2024-10-31 22:02:39,489 INFO L125 PetriNetUnfolderBase]: For 4/6 co-relation queries the response was YES. [2024-10-31 22:02:39,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1010 conditions, 549 events. 223/549 cut-off events. For 4/6 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2381 event pairs, 185 based on Foata normal form. 24/410 useless extension candidates. Maximal degree in co-relation 954. Up to 455 conditions per place. [2024-10-31 22:02:39,499 INFO L140 encePairwiseOnDemand]: 83/117 looper letters, 60 selfloop transitions, 1 changer transitions 0/83 dead transitions. [2024-10-31 22:02:39,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 83 transitions, 295 flow [2024-10-31 22:02:39,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:02:39,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:02:39,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 163 transitions. [2024-10-31 22:02:39,521 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46438746438746437 [2024-10-31 22:02:39,526 INFO L175 Difference]: Start difference. First operand has 107 places, 117 transitions, 241 flow. Second operand 3 states and 163 transitions. [2024-10-31 22:02:39,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 83 transitions, 295 flow [2024-10-31 22:02:39,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 83 transitions, 295 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-31 22:02:39,538 INFO L231 Difference]: Finished difference. Result has 80 places, 83 transitions, 175 flow [2024-10-31 22:02:39,543 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=175, PETRI_PLACES=80, PETRI_TRANSITIONS=83} [2024-10-31 22:02:39,547 INFO L277 CegarLoopForPetriNet]: 107 programPoint places, -27 predicate places. [2024-10-31 22:02:39,550 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 83 transitions, 175 flow [2024-10-31 22:02:39,550 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:39,550 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:02:39,550 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-10-31 22:02:39,551 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 22:02:39,552 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 85 more)] === [2024-10-31 22:02:39,552 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:02:39,554 INFO L85 PathProgramCache]: Analyzing trace with hash 18709, now seen corresponding path program 1 times [2024-10-31 22:02:39,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:02:39,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501190658] [2024-10-31 22:02:39,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:02:39,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:02:39,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:39,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:02:39,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:02:39,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501190658] [2024-10-31 22:02:39,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501190658] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:02:39,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:02:39,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-31 22:02:39,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47769412] [2024-10-31 22:02:39,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:02:39,770 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:02:39,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:02:39,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:02:39,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:02:39,811 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 117 [2024-10-31 22:02:39,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 83 transitions, 175 flow. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:39,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:02:39,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 117 [2024-10-31 22:02:39,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:02:40,041 INFO L124 PetriNetUnfolderBase]: 188/470 cut-off events. [2024-10-31 22:02:40,041 INFO L125 PetriNetUnfolderBase]: For 6/8 co-relation queries the response was YES. [2024-10-31 22:02:40,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 854 conditions, 470 events. 188/470 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1971 event pairs, 150 based on Foata normal form. 0/358 useless extension candidates. Maximal degree in co-relation 847. Up to 376 conditions per place. [2024-10-31 22:02:40,049 INFO L140 encePairwiseOnDemand]: 107/117 looper letters, 51 selfloop transitions, 1 changer transitions 0/74 dead transitions. [2024-10-31 22:02:40,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 74 transitions, 261 flow [2024-10-31 22:02:40,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:02:40,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:02:40,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 136 transitions. [2024-10-31 22:02:40,052 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38746438746438744 [2024-10-31 22:02:40,052 INFO L175 Difference]: Start difference. First operand has 80 places, 83 transitions, 175 flow. Second operand 3 states and 136 transitions. [2024-10-31 22:02:40,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 74 transitions, 261 flow [2024-10-31 22:02:40,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 74 transitions, 260 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 22:02:40,055 INFO L231 Difference]: Finished difference. Result has 72 places, 74 transitions, 158 flow [2024-10-31 22:02:40,056 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=158, PETRI_PLACES=72, PETRI_TRANSITIONS=74} [2024-10-31 22:02:40,057 INFO L277 CegarLoopForPetriNet]: 107 programPoint places, -35 predicate places. [2024-10-31 22:02:40,057 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 74 transitions, 158 flow [2024-10-31 22:02:40,057 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:40,058 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:02:40,058 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-31 22:02:40,058 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 22:02:40,058 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 85 more)] === [2024-10-31 22:02:40,059 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:02:40,059 INFO L85 PathProgramCache]: Analyzing trace with hash 118810337, now seen corresponding path program 1 times [2024-10-31 22:02:40,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:02:40,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791564199] [2024-10-31 22:02:40,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:02:40,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:02:40,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:40,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:02:40,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:02:40,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791564199] [2024-10-31 22:02:40,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791564199] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:02:40,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:02:40,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:02:40,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674820960] [2024-10-31 22:02:40,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:02:40,327 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:02:40,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:02:40,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:02:40,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:02:40,400 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 117 [2024-10-31 22:02:40,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 74 transitions, 158 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) [2024-10-31 22:02:40,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:02:40,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 117 [2024-10-31 22:02:40,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:02:40,667 INFO L124 PetriNetUnfolderBase]: 189/477 cut-off events. [2024-10-31 22:02:40,667 INFO L125 PetriNetUnfolderBase]: For 6/8 co-relation queries the response was YES. [2024-10-31 22:02:40,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 869 conditions, 477 events. 189/477 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2003 event pairs, 150 based on Foata normal form. 0/364 useless extension candidates. Maximal degree in co-relation 861. Up to 378 conditions per place. [2024-10-31 22:02:40,673 INFO L140 encePairwiseOnDemand]: 112/117 looper letters, 55 selfloop transitions, 4 changer transitions 0/80 dead transitions. [2024-10-31 22:02:40,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 80 transitions, 288 flow [2024-10-31 22:02:40,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:02:40,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:02:40,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 156 transitions. [2024-10-31 22:02:40,676 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2024-10-31 22:02:40,676 INFO L175 Difference]: Start difference. First operand has 72 places, 74 transitions, 158 flow. Second operand 4 states and 156 transitions. [2024-10-31 22:02:40,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 80 transitions, 288 flow [2024-10-31 22:02:40,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 80 transitions, 287 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 22:02:40,683 INFO L231 Difference]: Finished difference. Result has 75 places, 76 transitions, 178 flow [2024-10-31 22:02:40,683 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=178, PETRI_PLACES=75, PETRI_TRANSITIONS=76} [2024-10-31 22:02:40,685 INFO L277 CegarLoopForPetriNet]: 107 programPoint places, -32 predicate places. [2024-10-31 22:02:40,685 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 76 transitions, 178 flow [2024-10-31 22:02:40,686 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) [2024-10-31 22:02:40,686 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:02:40,687 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-31 22:02:40,687 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-31 22:02:40,687 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 85 more)] === [2024-10-31 22:02:40,688 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:02:40,688 INFO L85 PathProgramCache]: Analyzing trace with hash 118810309, now seen corresponding path program 1 times [2024-10-31 22:02:40,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:02:40,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396249718] [2024-10-31 22:02:40,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:02:40,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:02:40,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:40,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:02:40,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:02:40,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396249718] [2024-10-31 22:02:40,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396249718] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:02:40,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:02:40,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:02:40,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070785137] [2024-10-31 22:02:40,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:02:40,837 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:02:40,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:02:40,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:02:40,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:02:40,844 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 117 [2024-10-31 22:02:40,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 76 transitions, 178 flow. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:40,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:02:40,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 117 [2024-10-31 22:02:40,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:02:41,086 INFO L124 PetriNetUnfolderBase]: 188/473 cut-off events. [2024-10-31 22:02:41,087 INFO L125 PetriNetUnfolderBase]: For 8/10 co-relation queries the response was YES. [2024-10-31 22:02:41,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 869 conditions, 473 events. 188/473 cut-off events. For 8/10 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1970 event pairs, 150 based on Foata normal form. 1/363 useless extension candidates. Maximal degree in co-relation 859. Up to 368 conditions per place. [2024-10-31 22:02:41,090 INFO L140 encePairwiseOnDemand]: 112/117 looper letters, 51 selfloop transitions, 4 changer transitions 0/76 dead transitions. [2024-10-31 22:02:41,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 76 transitions, 285 flow [2024-10-31 22:02:41,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:02:41,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:02:41,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 152 transitions. [2024-10-31 22:02:41,092 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3247863247863248 [2024-10-31 22:02:41,093 INFO L175 Difference]: Start difference. First operand has 75 places, 76 transitions, 178 flow. Second operand 4 states and 152 transitions. [2024-10-31 22:02:41,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 76 transitions, 285 flow [2024-10-31 22:02:41,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 76 transitions, 279 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-10-31 22:02:41,096 INFO L231 Difference]: Finished difference. Result has 77 places, 75 transitions, 179 flow [2024-10-31 22:02:41,096 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=179, PETRI_PLACES=77, PETRI_TRANSITIONS=75} [2024-10-31 22:02:41,097 INFO L277 CegarLoopForPetriNet]: 107 programPoint places, -30 predicate places. [2024-10-31 22:02:41,097 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 75 transitions, 179 flow [2024-10-31 22:02:41,097 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:41,097 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:02:41,098 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:02:41,098 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-31 22:02:41,098 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 85 more)] === [2024-10-31 22:02:41,098 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:02:41,099 INFO L85 PathProgramCache]: Analyzing trace with hash 426277240, now seen corresponding path program 1 times [2024-10-31 22:02:41,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:02:41,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954122306] [2024-10-31 22:02:41,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:02:41,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:02:41,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:41,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:02:41,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:02:41,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954122306] [2024-10-31 22:02:41,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954122306] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:02:41,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124259499] [2024-10-31 22:02:41,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:02:41,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:02:41,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c96e85d-c79f-4ecb-a103-8f9144355b90/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:02:41,488 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c96e85d-c79f-4ecb-a103-8f9144355b90/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:02:41,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c96e85d-c79f-4ecb-a103-8f9144355b90/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 22:02:41,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:41,616 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-31 22:02:41,621 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:02:41,767 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:02:41,768 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:02:41,920 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 7 treesize of output 5 [2024-10-31 22:02:41,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:02:41,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124259499] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:02:41,942 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:02:41,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2024-10-31 22:02:41,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921968520] [2024-10-31 22:02:41,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:02:41,943 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-31 22:02:41,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:02:41,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-31 22:02:41,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2024-10-31 22:02:42,369 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 117 [2024-10-31 22:02:42,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 75 transitions, 179 flow. Second operand has 14 states, 14 states have (on average 24.928571428571427) internal successors, (349), 14 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:42,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:02:42,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 117 [2024-10-31 22:02:42,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:02:42,865 INFO L124 PetriNetUnfolderBase]: 189/477 cut-off events. [2024-10-31 22:02:42,865 INFO L125 PetriNetUnfolderBase]: For 10/12 co-relation queries the response was YES. [2024-10-31 22:02:42,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 884 conditions, 477 events. 189/477 cut-off events. For 10/12 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1996 event pairs, 150 based on Foata normal form. 1/366 useless extension candidates. Maximal degree in co-relation 873. Up to 368 conditions per place. [2024-10-31 22:02:42,869 INFO L140 encePairwiseOnDemand]: 111/117 looper letters, 54 selfloop transitions, 7 changer transitions 0/81 dead transitions. [2024-10-31 22:02:42,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 81 transitions, 315 flow [2024-10-31 22:02:42,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 22:02:42,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-31 22:02:42,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 223 transitions. [2024-10-31 22:02:42,872 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.27228327228327226 [2024-10-31 22:02:42,875 INFO L175 Difference]: Start difference. First operand has 77 places, 75 transitions, 179 flow. Second operand 7 states and 223 transitions. [2024-10-31 22:02:42,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 81 transitions, 315 flow [2024-10-31 22:02:42,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 81 transitions, 305 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-31 22:02:42,880 INFO L231 Difference]: Finished difference. Result has 80 places, 76 transitions, 190 flow [2024-10-31 22:02:42,880 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=190, PETRI_PLACES=80, PETRI_TRANSITIONS=76} [2024-10-31 22:02:42,881 INFO L277 CegarLoopForPetriNet]: 107 programPoint places, -27 predicate places. [2024-10-31 22:02:42,881 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 76 transitions, 190 flow [2024-10-31 22:02:42,884 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 24.928571428571427) internal successors, (349), 14 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:42,884 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:02:42,884 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:02:42,906 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c96e85d-c79f-4ecb-a103-8f9144355b90/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-31 22:02:43,085 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c96e85d-c79f-4ecb-a103-8f9144355b90/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:02:43,086 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 85 more)] === [2024-10-31 22:02:43,086 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:02:43,087 INFO L85 PathProgramCache]: Analyzing trace with hash 426277212, now seen corresponding path program 1 times [2024-10-31 22:02:43,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:02:43,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358476922] [2024-10-31 22:02:43,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:02:43,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:02:43,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:43,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:02:43,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:02:43,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358476922] [2024-10-31 22:02:43,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358476922] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:02:43,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944691842] [2024-10-31 22:02:43,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:02:43,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:02:43,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c96e85d-c79f-4ecb-a103-8f9144355b90/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:02:43,259 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c96e85d-c79f-4ecb-a103-8f9144355b90/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:02:43,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c96e85d-c79f-4ecb-a103-8f9144355b90/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 22:02:43,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:43,372 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-31 22:02:43,373 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:02:43,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:02:43,443 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:02:43,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:02:43,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944691842] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:02:43,511 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:02:43,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-10-31 22:02:43,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327969773] [2024-10-31 22:02:43,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:02:43,512 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-31 22:02:43,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:02:43,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-31 22:02:43,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-10-31 22:02:43,525 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 117 [2024-10-31 22:02:43,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 76 transitions, 190 flow. Second operand has 8 states, 8 states have (on average 25.25) internal successors, (202), 8 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:43,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:02:43,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 117 [2024-10-31 22:02:43,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:02:43,809 INFO L124 PetriNetUnfolderBase]: 188/475 cut-off events. [2024-10-31 22:02:43,809 INFO L125 PetriNetUnfolderBase]: For 16/18 co-relation queries the response was YES. [2024-10-31 22:02:43,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 887 conditions, 475 events. 188/475 cut-off events. For 16/18 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1968 event pairs, 150 based on Foata normal form. 1/365 useless extension candidates. Maximal degree in co-relation 875. Up to 368 conditions per place. [2024-10-31 22:02:43,813 INFO L140 encePairwiseOnDemand]: 111/117 looper letters, 52 selfloop transitions, 7 changer transitions 0/79 dead transitions. [2024-10-31 22:02:43,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 79 transitions, 319 flow [2024-10-31 22:02:43,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 22:02:43,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-31 22:02:43,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 198 transitions. [2024-10-31 22:02:43,815 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.28205128205128205 [2024-10-31 22:02:43,815 INFO L175 Difference]: Start difference. First operand has 80 places, 76 transitions, 190 flow. Second operand 6 states and 198 transitions. [2024-10-31 22:02:43,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 79 transitions, 319 flow [2024-10-31 22:02:43,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 79 transitions, 308 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-10-31 22:02:43,820 INFO L231 Difference]: Finished difference. Result has 82 places, 76 transitions, 200 flow [2024-10-31 22:02:43,820 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=200, PETRI_PLACES=82, PETRI_TRANSITIONS=76} [2024-10-31 22:02:43,821 INFO L277 CegarLoopForPetriNet]: 107 programPoint places, -25 predicate places. [2024-10-31 22:02:43,821 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 76 transitions, 200 flow [2024-10-31 22:02:43,821 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 25.25) internal successors, (202), 8 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:43,821 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:02:43,825 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-10-31 22:02:43,847 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c96e85d-c79f-4ecb-a103-8f9144355b90/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-31 22:02:44,025 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c96e85d-c79f-4ecb-a103-8f9144355b90/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-31 22:02:44,026 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 85 more)] === [2024-10-31 22:02:44,027 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:02:44,027 INFO L85 PathProgramCache]: Analyzing trace with hash -992457883, now seen corresponding path program 2 times [2024-10-31 22:02:44,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:02:44,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261548365] [2024-10-31 22:02:44,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:02:44,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:02:44,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:44,267 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-31 22:02:44,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:02:44,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261548365] [2024-10-31 22:02:44,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261548365] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:02:44,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:02:44,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-31 22:02:44,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600545556] [2024-10-31 22:02:44,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:02:44,269 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:02:44,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:02:44,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:02:44,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:02:44,300 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 117 [2024-10-31 22:02:44,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 76 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:44,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:02:44,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 117 [2024-10-31 22:02:44,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:02:44,465 INFO L124 PetriNetUnfolderBase]: 188/474 cut-off events. [2024-10-31 22:02:44,465 INFO L125 PetriNetUnfolderBase]: For 17/19 co-relation queries the response was YES. [2024-10-31 22:02:44,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 885 conditions, 474 events. 188/474 cut-off events. For 17/19 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1966 event pairs, 150 based on Foata normal form. 0/364 useless extension candidates. Maximal degree in co-relation 873. Up to 368 conditions per place. [2024-10-31 22:02:44,469 INFO L140 encePairwiseOnDemand]: 114/117 looper letters, 50 selfloop transitions, 2 changer transitions 0/75 dead transitions. [2024-10-31 22:02:44,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 75 transitions, 302 flow [2024-10-31 22:02:44,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:02:44,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:02:44,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 126 transitions. [2024-10-31 22:02:44,471 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.358974358974359 [2024-10-31 22:02:44,471 INFO L175 Difference]: Start difference. First operand has 82 places, 76 transitions, 200 flow. Second operand 3 states and 126 transitions. [2024-10-31 22:02:44,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 75 transitions, 302 flow [2024-10-31 22:02:44,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 75 transitions, 288 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-31 22:02:44,474 INFO L231 Difference]: Finished difference. Result has 79 places, 75 transitions, 188 flow [2024-10-31 22:02:44,474 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=188, PETRI_PLACES=79, PETRI_TRANSITIONS=75} [2024-10-31 22:02:44,475 INFO L277 CegarLoopForPetriNet]: 107 programPoint places, -28 predicate places. [2024-10-31 22:02:44,475 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 75 transitions, 188 flow [2024-10-31 22:02:44,475 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:44,476 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:02:44,476 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:02:44,476 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-31 22:02:44,476 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 85 more)] === [2024-10-31 22:02:44,476 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:02:44,477 INFO L85 PathProgramCache]: Analyzing trace with hash 242692767, now seen corresponding path program 1 times [2024-10-31 22:02:44,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:02:44,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479956806] [2024-10-31 22:02:44,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:02:44,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:02:44,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:44,644 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-31 22:02:44,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:02:44,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479956806] [2024-10-31 22:02:44,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479956806] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:02:44,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:02:44,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-31 22:02:44,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664247336] [2024-10-31 22:02:44,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:02:44,646 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:02:44,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:02:44,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:02:44,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:02:44,674 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 117 [2024-10-31 22:02:44,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 75 transitions, 188 flow. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:44,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:02:44,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 117 [2024-10-31 22:02:44,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:02:44,817 INFO L124 PetriNetUnfolderBase]: 188/468 cut-off events. [2024-10-31 22:02:44,817 INFO L125 PetriNetUnfolderBase]: For 10/12 co-relation queries the response was YES. [2024-10-31 22:02:44,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 874 conditions, 468 events. 188/468 cut-off events. For 10/12 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1917 event pairs, 150 based on Foata normal form. 64/428 useless extension candidates. Maximal degree in co-relation 862. Up to 378 conditions per place. [2024-10-31 22:02:44,821 INFO L140 encePairwiseOnDemand]: 114/117 looper letters, 51 selfloop transitions, 1 changer transitions 0/73 dead transitions. [2024-10-31 22:02:44,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 73 transitions, 288 flow [2024-10-31 22:02:44,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:02:44,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:02:44,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 121 transitions. [2024-10-31 22:02:44,822 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.34472934472934474 [2024-10-31 22:02:44,822 INFO L175 Difference]: Start difference. First operand has 79 places, 75 transitions, 188 flow. Second operand 3 states and 121 transitions. [2024-10-31 22:02:44,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 73 transitions, 288 flow [2024-10-31 22:02:44,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 73 transitions, 284 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:02:44,825 INFO L231 Difference]: Finished difference. Result has 77 places, 73 transitions, 182 flow [2024-10-31 22:02:44,825 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=182, PETRI_PLACES=77, PETRI_TRANSITIONS=73} [2024-10-31 22:02:44,826 INFO L277 CegarLoopForPetriNet]: 107 programPoint places, -30 predicate places. [2024-10-31 22:02:44,826 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 73 transitions, 182 flow [2024-10-31 22:02:44,826 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:44,826 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:02:44,827 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:02:44,827 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-31 22:02:44,827 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 85 more)] === [2024-10-31 22:02:44,827 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:02:44,828 INFO L85 PathProgramCache]: Analyzing trace with hash 242692768, now seen corresponding path program 1 times [2024-10-31 22:02:44,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:02:44,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192445020] [2024-10-31 22:02:44,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:02:44,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:02:44,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:45,057 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-31 22:02:45,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:02:45,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192445020] [2024-10-31 22:02:45,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192445020] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:02:45,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:02:45,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:02:45,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717641532] [2024-10-31 22:02:45,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:02:45,059 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:02:45,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:02:45,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:02:45,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:02:45,102 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 117 [2024-10-31 22:02:45,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 73 transitions, 182 flow. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:45,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:02:45,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 117 [2024-10-31 22:02:45,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:02:45,315 INFO L124 PetriNetUnfolderBase]: 151/421 cut-off events. [2024-10-31 22:02:45,316 INFO L125 PetriNetUnfolderBase]: For 10/13 co-relation queries the response was YES. [2024-10-31 22:02:45,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 770 conditions, 421 events. 151/421 cut-off events. For 10/13 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1999 event pairs, 34 based on Foata normal form. 61/401 useless extension candidates. Maximal degree in co-relation 758. Up to 217 conditions per place. [2024-10-31 22:02:45,319 INFO L140 encePairwiseOnDemand]: 109/117 looper letters, 83 selfloop transitions, 5 changer transitions 1/108 dead transitions. [2024-10-31 22:02:45,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 108 transitions, 430 flow [2024-10-31 22:02:45,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:02:45,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:02:45,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 183 transitions. [2024-10-31 22:02:45,320 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.391025641025641 [2024-10-31 22:02:45,320 INFO L175 Difference]: Start difference. First operand has 77 places, 73 transitions, 182 flow. Second operand 4 states and 183 transitions. [2024-10-31 22:02:45,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 108 transitions, 430 flow [2024-10-31 22:02:45,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 108 transitions, 429 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 22:02:45,324 INFO L231 Difference]: Finished difference. Result has 80 places, 72 transitions, 199 flow [2024-10-31 22:02:45,325 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=199, PETRI_PLACES=80, PETRI_TRANSITIONS=72} [2024-10-31 22:02:45,325 INFO L277 CegarLoopForPetriNet]: 107 programPoint places, -27 predicate places. [2024-10-31 22:02:45,325 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 72 transitions, 199 flow [2024-10-31 22:02:45,326 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:45,326 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:02:45,326 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:02:45,326 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-31 22:02:45,326 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 85 more)] === [2024-10-31 22:02:45,327 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:02:45,327 INFO L85 PathProgramCache]: Analyzing trace with hash -979843097, now seen corresponding path program 1 times [2024-10-31 22:02:45,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:02:45,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241058828] [2024-10-31 22:02:45,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:02:45,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:02:45,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:45,723 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-31 22:02:45,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:02:45,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241058828] [2024-10-31 22:02:45,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241058828] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:02:45,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78553633] [2024-10-31 22:02:45,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:02:45,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:02:45,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c96e85d-c79f-4ecb-a103-8f9144355b90/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:02:45,728 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c96e85d-c79f-4ecb-a103-8f9144355b90/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:02:45,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c96e85d-c79f-4ecb-a103-8f9144355b90/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-31 22:02:45,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:45,869 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-31 22:02:45,871 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:02:46,141 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-31 22:02:46,141 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:02:46,333 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-31 22:02:46,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78553633] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:02:46,333 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:02:46,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-10-31 22:02:46,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960075968] [2024-10-31 22:02:46,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:02:46,334 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-31 22:02:46,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:02:46,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-31 22:02:46,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-10-31 22:02:46,526 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 117 [2024-10-31 22:02:46,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 72 transitions, 199 flow. Second operand has 11 states, 11 states have (on average 24.818181818181817) internal successors, (273), 11 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:46,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:02:46,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 117 [2024-10-31 22:02:46,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:02:46,912 INFO L124 PetriNetUnfolderBase]: 116/313 cut-off events. [2024-10-31 22:02:46,912 INFO L125 PetriNetUnfolderBase]: For 88/88 co-relation queries the response was YES. [2024-10-31 22:02:46,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 655 conditions, 313 events. 116/313 cut-off events. For 88/88 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1266 event pairs, 26 based on Foata normal form. 66/335 useless extension candidates. Maximal degree in co-relation 641. Up to 202 conditions per place. [2024-10-31 22:02:46,915 INFO L140 encePairwiseOnDemand]: 112/117 looper letters, 81 selfloop transitions, 3 changer transitions 0/99 dead transitions. [2024-10-31 22:02:46,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 99 transitions, 406 flow [2024-10-31 22:02:46,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:02:46,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:02:46,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 189 transitions. [2024-10-31 22:02:46,917 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3230769230769231 [2024-10-31 22:02:46,917 INFO L175 Difference]: Start difference. First operand has 80 places, 72 transitions, 199 flow. Second operand 5 states and 189 transitions. [2024-10-31 22:02:46,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 99 transitions, 406 flow [2024-10-31 22:02:46,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 99 transitions, 398 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-31 22:02:46,921 INFO L231 Difference]: Finished difference. Result has 71 places, 63 transitions, 164 flow [2024-10-31 22:02:46,921 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=67, 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=164, PETRI_PLACES=71, PETRI_TRANSITIONS=63} [2024-10-31 22:02:46,922 INFO L277 CegarLoopForPetriNet]: 107 programPoint places, -36 predicate places. [2024-10-31 22:02:46,922 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 63 transitions, 164 flow [2024-10-31 22:02:46,922 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 24.818181818181817) internal successors, (273), 11 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:46,923 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:02:46,923 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:02:46,944 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c96e85d-c79f-4ecb-a103-8f9144355b90/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-31 22:02:47,127 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c96e85d-c79f-4ecb-a103-8f9144355b90/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-31 22:02:47,127 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 85 more)] === [2024-10-31 22:02:47,128 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:02:47,128 INFO L85 PathProgramCache]: Analyzing trace with hash -310364262, now seen corresponding path program 1 times [2024-10-31 22:02:47,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:02:47,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402688116] [2024-10-31 22:02:47,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:02:47,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:02:47,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-31 22:02:47,178 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-31 22:02:47,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-31 22:02:47,243 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-31 22:02:47,243 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-31 22:02:47,245 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (87 of 88 remaining) [2024-10-31 22:02:47,247 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (86 of 88 remaining) [2024-10-31 22:02:47,249 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (85 of 88 remaining) [2024-10-31 22:02:47,249 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (84 of 88 remaining) [2024-10-31 22:02:47,250 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (83 of 88 remaining) [2024-10-31 22:02:47,250 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (82 of 88 remaining) [2024-10-31 22:02:47,250 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (81 of 88 remaining) [2024-10-31 22:02:47,251 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (80 of 88 remaining) [2024-10-31 22:02:47,251 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (79 of 88 remaining) [2024-10-31 22:02:47,251 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (78 of 88 remaining) [2024-10-31 22:02:47,251 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (77 of 88 remaining) [2024-10-31 22:02:47,252 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (76 of 88 remaining) [2024-10-31 22:02:47,252 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (75 of 88 remaining) [2024-10-31 22:02:47,252 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (74 of 88 remaining) [2024-10-31 22:02:47,252 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (73 of 88 remaining) [2024-10-31 22:02:47,253 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (72 of 88 remaining) [2024-10-31 22:02:47,253 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (71 of 88 remaining) [2024-10-31 22:02:47,253 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (70 of 88 remaining) [2024-10-31 22:02:47,253 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (69 of 88 remaining) [2024-10-31 22:02:47,254 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (68 of 88 remaining) [2024-10-31 22:02:47,254 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (67 of 88 remaining) [2024-10-31 22:02:47,254 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (66 of 88 remaining) [2024-10-31 22:02:47,254 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr24ASSERT_VIOLATIONMEMORY_LEAK (65 of 88 remaining) [2024-10-31 22:02:47,254 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (64 of 88 remaining) [2024-10-31 22:02:47,255 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (63 of 88 remaining) [2024-10-31 22:02:47,255 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 88 remaining) [2024-10-31 22:02:47,256 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 88 remaining) [2024-10-31 22:02:47,256 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 88 remaining) [2024-10-31 22:02:47,256 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 88 remaining) [2024-10-31 22:02:47,257 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 88 remaining) [2024-10-31 22:02:47,257 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 88 remaining) [2024-10-31 22:02:47,257 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 88 remaining) [2024-10-31 22:02:47,257 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 88 remaining) [2024-10-31 22:02:47,258 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 88 remaining) [2024-10-31 22:02:47,258 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 88 remaining) [2024-10-31 22:02:47,258 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 88 remaining) [2024-10-31 22:02:47,258 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 88 remaining) [2024-10-31 22:02:47,259 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 88 remaining) [2024-10-31 22:02:47,259 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 88 remaining) [2024-10-31 22:02:47,259 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 88 remaining) [2024-10-31 22:02:47,259 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 88 remaining) [2024-10-31 22:02:47,259 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 88 remaining) [2024-10-31 22:02:47,260 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 88 remaining) [2024-10-31 22:02:47,260 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 88 remaining) [2024-10-31 22:02:47,260 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 88 remaining) [2024-10-31 22:02:47,260 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 88 remaining) [2024-10-31 22:02:47,261 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 88 remaining) [2024-10-31 22:02:47,261 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 88 remaining) [2024-10-31 22:02:47,261 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 88 remaining) [2024-10-31 22:02:47,261 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 88 remaining) [2024-10-31 22:02:47,261 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 88 remaining) [2024-10-31 22:02:47,261 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 88 remaining) [2024-10-31 22:02:47,262 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 88 remaining) [2024-10-31 22:02:47,262 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 88 remaining) [2024-10-31 22:02:47,262 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 88 remaining) [2024-10-31 22:02:47,262 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 88 remaining) [2024-10-31 22:02:47,262 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 88 remaining) [2024-10-31 22:02:47,262 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 88 remaining) [2024-10-31 22:02:47,263 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 88 remaining) [2024-10-31 22:02:47,263 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr24ASSERT_VIOLATIONMEMORY_LEAK (28 of 88 remaining) [2024-10-31 22:02:47,264 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 88 remaining) [2024-10-31 22:02:47,264 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 88 remaining) [2024-10-31 22:02:47,264 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 88 remaining) [2024-10-31 22:02:47,278 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 88 remaining) [2024-10-31 22:02:47,279 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 88 remaining) [2024-10-31 22:02:47,279 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 88 remaining) [2024-10-31 22:02:47,279 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 88 remaining) [2024-10-31 22:02:47,279 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 88 remaining) [2024-10-31 22:02:47,280 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 88 remaining) [2024-10-31 22:02:47,280 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 88 remaining) [2024-10-31 22:02:47,280 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 88 remaining) [2024-10-31 22:02:47,280 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 88 remaining) [2024-10-31 22:02:47,281 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 88 remaining) [2024-10-31 22:02:47,281 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 88 remaining) [2024-10-31 22:02:47,281 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 88 remaining) [2024-10-31 22:02:47,281 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 88 remaining) [2024-10-31 22:02:47,282 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 88 remaining) [2024-10-31 22:02:47,282 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 88 remaining) [2024-10-31 22:02:47,282 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 88 remaining) [2024-10-31 22:02:47,283 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 88 remaining) [2024-10-31 22:02:47,283 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 88 remaining) [2024-10-31 22:02:47,283 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 88 remaining) [2024-10-31 22:02:47,283 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 88 remaining) [2024-10-31 22:02:47,284 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 88 remaining) [2024-10-31 22:02:47,284 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 88 remaining) [2024-10-31 22:02:47,284 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 88 remaining) [2024-10-31 22:02:47,284 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 88 remaining) [2024-10-31 22:02:47,285 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 88 remaining) [2024-10-31 22:02:47,285 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-10-31 22:02:47,285 INFO L407 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:02:47,289 WARN L244 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-31 22:02:47,289 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-10-31 22:02:47,375 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-31 22:02:47,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 181 places, 201 transitions, 418 flow [2024-10-31 22:02:47,426 INFO L124 PetriNetUnfolderBase]: 26/237 cut-off events. [2024-10-31 22:02:47,427 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-10-31 22:02:47,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 249 conditions, 237 events. 26/237 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1180 event pairs, 0 based on Foata normal form. 0/107 useless extension candidates. Maximal degree in co-relation 187. Up to 6 conditions per place. [2024-10-31 22:02:47,430 INFO L82 GeneralOperation]: Start removeDead. Operand has 181 places, 201 transitions, 418 flow [2024-10-31 22:02:47,436 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 181 places, 201 transitions, 418 flow [2024-10-31 22:02:47,437 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:02:47,438 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;@7d900230, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:02:47,438 INFO L334 AbstractCegarLoop]: Starting to check reachability of 125 error locations. [2024-10-31 22:02:47,440 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-31 22:02:47,440 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-10-31 22:02:47,440 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-31 22:02:47,440 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:02:47,440 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-10-31 22:02:47,440 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 122 more)] === [2024-10-31 22:02:47,441 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:02:47,441 INFO L85 PathProgramCache]: Analyzing trace with hash 25140, now seen corresponding path program 1 times [2024-10-31 22:02:47,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:02:47,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614223936] [2024-10-31 22:02:47,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:02:47,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:02:47,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:47,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:02:47,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:02:47,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614223936] [2024-10-31 22:02:47,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614223936] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:02:47,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:02:47,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-31 22:02:47,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272631562] [2024-10-31 22:02:47,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:02:47,516 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:02:47,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:02:47,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:02:47,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:02:47,561 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 201 [2024-10-31 22:02:47,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 201 transitions, 418 flow. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 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) [2024-10-31 22:02:47,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:02:47,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 201 [2024-10-31 22:02:47,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:02:51,717 INFO L124 PetriNetUnfolderBase]: 19095/30098 cut-off events. [2024-10-31 22:02:51,718 INFO L125 PetriNetUnfolderBase]: For 330/335 co-relation queries the response was YES. [2024-10-31 22:02:51,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58614 conditions, 30098 events. 19095/30098 cut-off events. For 330/335 co-relation queries the response was YES. Maximal size of possible extension queue 764. Compared 204963 event pairs, 16870 based on Foata normal form. 1814/22601 useless extension candidates. Maximal degree in co-relation 55727. Up to 28317 conditions per place. [2024-10-31 22:02:51,963 INFO L140 encePairwiseOnDemand]: 138/201 looper letters, 103 selfloop transitions, 1 changer transitions 0/137 dead transitions. [2024-10-31 22:02:51,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 137 transitions, 498 flow [2024-10-31 22:02:51,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:02:51,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:02:51,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 271 transitions. [2024-10-31 22:02:51,966 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4494195688225539 [2024-10-31 22:02:51,966 INFO L175 Difference]: Start difference. First operand has 181 places, 201 transitions, 418 flow. Second operand 3 states and 271 transitions. [2024-10-31 22:02:51,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 137 transitions, 498 flow [2024-10-31 22:02:51,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 137 transitions, 498 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-31 22:02:51,971 INFO L231 Difference]: Finished difference. Result has 129 places, 137 transitions, 292 flow [2024-10-31 22:02:51,972 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=292, PETRI_PLACES=129, PETRI_TRANSITIONS=137} [2024-10-31 22:02:51,972 INFO L277 CegarLoopForPetriNet]: 181 programPoint places, -52 predicate places. [2024-10-31 22:02:51,973 INFO L471 AbstractCegarLoop]: Abstraction has has 129 places, 137 transitions, 292 flow [2024-10-31 22:02:51,973 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 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) [2024-10-31 22:02:51,973 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:02:51,973 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-10-31 22:02:51,974 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-31 22:02:51,974 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 122 more)] === [2024-10-31 22:02:51,974 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:02:51,975 INFO L85 PathProgramCache]: Analyzing trace with hash 25141, now seen corresponding path program 1 times [2024-10-31 22:02:51,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:02:51,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889831221] [2024-10-31 22:02:51,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:02:51,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:02:51,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:52,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:02:52,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:02:52,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889831221] [2024-10-31 22:02:52,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889831221] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:02:52,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:02:52,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-31 22:02:52,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743156420] [2024-10-31 22:02:52,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:02:52,065 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:02:52,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:02:52,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:02:52,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:02:52,108 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 201 [2024-10-31 22:02:52,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 137 transitions, 292 flow. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:52,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:02:52,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 201 [2024-10-31 22:02:52,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:02:54,452 INFO L124 PetriNetUnfolderBase]: 13222/20991 cut-off events. [2024-10-31 22:02:54,452 INFO L125 PetriNetUnfolderBase]: For 274/279 co-relation queries the response was YES. [2024-10-31 22:02:54,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40552 conditions, 20991 events. 13222/20991 cut-off events. For 274/279 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 137190 event pairs, 11340 based on Foata normal form. 0/16305 useless extension candidates. Maximal degree in co-relation 40544. Up to 19395 conditions per place. [2024-10-31 22:02:54,594 INFO L140 encePairwiseOnDemand]: 184/201 looper letters, 87 selfloop transitions, 1 changer transitions 0/121 dead transitions. [2024-10-31 22:02:54,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 121 transitions, 436 flow [2024-10-31 22:02:54,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:02:54,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:02:54,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 221 transitions. [2024-10-31 22:02:54,596 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.36650082918739635 [2024-10-31 22:02:54,596 INFO L175 Difference]: Start difference. First operand has 129 places, 137 transitions, 292 flow. Second operand 3 states and 221 transitions. [2024-10-31 22:02:54,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 121 transitions, 436 flow [2024-10-31 22:02:54,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 121 transitions, 435 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 22:02:54,600 INFO L231 Difference]: Finished difference. Result has 114 places, 121 transitions, 261 flow [2024-10-31 22:02:54,600 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=261, PETRI_PLACES=114, PETRI_TRANSITIONS=121} [2024-10-31 22:02:54,602 INFO L277 CegarLoopForPetriNet]: 181 programPoint places, -67 predicate places. [2024-10-31 22:02:54,603 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 121 transitions, 261 flow [2024-10-31 22:02:54,603 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:54,603 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:02:54,603 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-31 22:02:54,603 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-10-31 22:02:54,604 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 122 more)] === [2024-10-31 22:02:54,604 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:02:54,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1770117697, now seen corresponding path program 1 times [2024-10-31 22:02:54,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:02:54,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932967278] [2024-10-31 22:02:54,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:02:54,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:02:54,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:54,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:02:54,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:02:54,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932967278] [2024-10-31 22:02:54,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932967278] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:02:54,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:02:54,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:02:54,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307126896] [2024-10-31 22:02:54,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:02:54,760 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:02:54,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:02:54,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:02:54,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:02:54,831 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 201 [2024-10-31 22:02:54,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 121 transitions, 261 flow. Second operand has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:54,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:02:54,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 201 [2024-10-31 22:02:54,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:02:56,821 INFO L124 PetriNetUnfolderBase]: 13223/20998 cut-off events. [2024-10-31 22:02:56,821 INFO L125 PetriNetUnfolderBase]: For 274/279 co-relation queries the response was YES. [2024-10-31 22:02:56,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40567 conditions, 20998 events. 13223/20998 cut-off events. For 274/279 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 137255 event pairs, 11340 based on Foata normal form. 0/16311 useless extension candidates. Maximal degree in co-relation 40558. Up to 19397 conditions per place. [2024-10-31 22:02:56,948 INFO L140 encePairwiseOnDemand]: 196/201 looper letters, 91 selfloop transitions, 4 changer transitions 0/127 dead transitions. [2024-10-31 22:02:56,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 127 transitions, 463 flow [2024-10-31 22:02:56,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:02:56,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:02:56,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 248 transitions. [2024-10-31 22:02:56,950 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.30845771144278605 [2024-10-31 22:02:56,950 INFO L175 Difference]: Start difference. First operand has 114 places, 121 transitions, 261 flow. Second operand 4 states and 248 transitions. [2024-10-31 22:02:56,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 127 transitions, 463 flow [2024-10-31 22:02:56,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 127 transitions, 462 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 22:02:56,954 INFO L231 Difference]: Finished difference. Result has 117 places, 123 transitions, 281 flow [2024-10-31 22:02:56,954 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=281, PETRI_PLACES=117, PETRI_TRANSITIONS=123} [2024-10-31 22:02:56,956 INFO L277 CegarLoopForPetriNet]: 181 programPoint places, -64 predicate places. [2024-10-31 22:02:56,956 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 123 transitions, 281 flow [2024-10-31 22:02:56,956 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:56,957 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:02:56,957 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-31 22:02:56,957 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-10-31 22:02:56,957 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 122 more)] === [2024-10-31 22:02:56,957 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:02:56,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1770117669, now seen corresponding path program 1 times [2024-10-31 22:02:56,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:02:56,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730473239] [2024-10-31 22:02:56,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:02:56,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:02:56,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:57,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:02:57,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:02:57,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730473239] [2024-10-31 22:02:57,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730473239] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:02:57,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:02:57,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:02:57,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714961061] [2024-10-31 22:02:57,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:02:57,045 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:02:57,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:02:57,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:02:57,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:02:57,051 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 201 [2024-10-31 22:02:57,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 123 transitions, 281 flow. Second operand has 4 states, 4 states have (on average 39.5) internal successors, (158), 4 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:57,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:02:57,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 201 [2024-10-31 22:02:57,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:02:59,364 INFO L124 PetriNetUnfolderBase]: 13222/20994 cut-off events. [2024-10-31 22:02:59,365 INFO L125 PetriNetUnfolderBase]: For 276/281 co-relation queries the response was YES. [2024-10-31 22:02:59,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40567 conditions, 20994 events. 13222/20994 cut-off events. For 276/281 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 137169 event pairs, 11340 based on Foata normal form. 1/16310 useless extension candidates. Maximal degree in co-relation 40556. Up to 19387 conditions per place. [2024-10-31 22:02:59,484 INFO L140 encePairwiseOnDemand]: 196/201 looper letters, 87 selfloop transitions, 4 changer transitions 0/123 dead transitions. [2024-10-31 22:02:59,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 123 transitions, 460 flow [2024-10-31 22:02:59,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:02:59,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:02:59,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 244 transitions. [2024-10-31 22:02:59,486 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3034825870646766 [2024-10-31 22:02:59,486 INFO L175 Difference]: Start difference. First operand has 117 places, 123 transitions, 281 flow. Second operand 4 states and 244 transitions. [2024-10-31 22:02:59,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 123 transitions, 460 flow [2024-10-31 22:02:59,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 123 transitions, 454 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-10-31 22:02:59,489 INFO L231 Difference]: Finished difference. Result has 119 places, 122 transitions, 282 flow [2024-10-31 22:02:59,490 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=282, PETRI_PLACES=119, PETRI_TRANSITIONS=122} [2024-10-31 22:02:59,490 INFO L277 CegarLoopForPetriNet]: 181 programPoint places, -62 predicate places. [2024-10-31 22:02:59,490 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 122 transitions, 282 flow [2024-10-31 22:02:59,491 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.5) internal successors, (158), 4 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:59,491 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:02:59,491 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:02:59,491 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-10-31 22:02:59,491 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 122 more)] === [2024-10-31 22:02:59,491 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:02:59,492 INFO L85 PathProgramCache]: Analyzing trace with hash -31369791, now seen corresponding path program 1 times [2024-10-31 22:02:59,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:02:59,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837997825] [2024-10-31 22:02:59,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:02:59,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:02:59,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:59,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:02:59,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:02:59,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837997825] [2024-10-31 22:02:59,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837997825] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:02:59,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648848380] [2024-10-31 22:02:59,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:02:59,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:02:59,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c96e85d-c79f-4ecb-a103-8f9144355b90/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:02:59,802 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c96e85d-c79f-4ecb-a103-8f9144355b90/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:02:59,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c96e85d-c79f-4ecb-a103-8f9144355b90/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-31 22:02:59,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:59,938 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-31 22:02:59,941 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:03:00,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:03:00,061 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:03:00,180 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 7 treesize of output 5 [2024-10-31 22:03:00,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:03:00,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648848380] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:03:00,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:03:00,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2024-10-31 22:03:00,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921104402] [2024-10-31 22:03:00,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:03:00,198 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-31 22:03:00,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:03:00,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-31 22:03:00,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2024-10-31 22:03:00,729 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 201 [2024-10-31 22:03:00,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 122 transitions, 282 flow. Second operand has 14 states, 14 states have (on average 38.92857142857143) internal successors, (545), 14 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:03:00,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:03:00,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 201 [2024-10-31 22:03:00,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:03:03,164 INFO L124 PetriNetUnfolderBase]: 13223/20998 cut-off events. [2024-10-31 22:03:03,165 INFO L125 PetriNetUnfolderBase]: For 278/283 co-relation queries the response was YES.