./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f0cbba-56f0-433d-96c4-e5c38fb52084/bin/uautomizer-verify-84ZbGMXZE1/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f0cbba-56f0-433d-96c4-e5c38fb52084/bin/uautomizer-verify-84ZbGMXZE1/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f0cbba-56f0-433d-96c4-e5c38fb52084/bin/uautomizer-verify-84ZbGMXZE1/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f0cbba-56f0-433d-96c4-e5c38fb52084/bin/uautomizer-verify-84ZbGMXZE1/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f0cbba-56f0-433d-96c4-e5c38fb52084/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f0cbba-56f0-433d-96c4-e5c38fb52084/bin/uautomizer-verify-84ZbGMXZE1 --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fe7fc3189e39cd6587b4d7d83621bd29f6e1c085e1b3af197b9abc1746b629ea --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-12-02 12:01:31,660 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-12-02 12:01:31,714 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f0cbba-56f0-433d-96c4-e5c38fb52084/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-Overflow-32bit-Automizer_Default.epf [2024-12-02 12:01:31,718 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-12-02 12:01:31,718 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-12-02 12:01:31,739 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-12-02 12:01:31,739 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-12-02 12:01:31,739 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-12-02 12:01:31,740 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-12-02 12:01:31,740 INFO L153 SettingsManager]: * Use memory slicer=true [2024-12-02 12:01:31,740 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-12-02 12:01:31,740 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-12-02 12:01:31,741 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-12-02 12:01:31,741 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-12-02 12:01:31,741 INFO L153 SettingsManager]: * Use SBE=true [2024-12-02 12:01:31,741 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-12-02 12:01:31,741 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-12-02 12:01:31,741 INFO L153 SettingsManager]: * sizeof long=4 [2024-12-02 12:01:31,741 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-12-02 12:01:31,741 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-12-02 12:01:31,741 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-12-02 12:01:31,741 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-12-02 12:01:31,742 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-12-02 12:01:31,742 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-12-02 12:01:31,742 INFO L153 SettingsManager]: * Check absence of signed integer overflows=ASSERTandASSUME [2024-12-02 12:01:31,742 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-12-02 12:01:31,742 INFO L153 SettingsManager]: * sizeof long double=12 [2024-12-02 12:01:31,742 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-12-02 12:01:31,742 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-12-02 12:01:31,742 INFO L153 SettingsManager]: * Use constant arrays=true [2024-12-02 12:01:31,742 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-12-02 12:01:31,743 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 12:01:31,743 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 12:01:31,743 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 12:01:31,743 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 12:01:31,743 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-12-02 12:01:31,743 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 12:01:31,743 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 12:01:31,743 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 12:01:31,743 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 12:01:31,743 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-12-02 12:01:31,744 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-12-02 12:01:31,744 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-12-02 12:01:31,744 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-12-02 12:01:31,744 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-12-02 12:01:31,744 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-12-02 12:01:31,744 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-12-02 12:01:31,744 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-12-02 12:01:31,744 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-12-02 12:01:31,744 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-12-02 12:01:31,745 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f0cbba-56f0-433d-96c4-e5c38fb52084/bin/uautomizer-verify-84ZbGMXZE1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) 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 -> fe7fc3189e39cd6587b4d7d83621bd29f6e1c085e1b3af197b9abc1746b629ea [2024-12-02 12:01:31,948 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-12-02 12:01:31,955 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-12-02 12:01:31,957 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-12-02 12:01:31,958 INFO L270 PluginConnector]: Initializing CDTParser... [2024-12-02 12:01:31,959 INFO L274 PluginConnector]: CDTParser initialized [2024-12-02 12:01:31,960 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f0cbba-56f0-433d-96c4-e5c38fb52084/bin/uautomizer-verify-84ZbGMXZE1/../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c [2024-12-02 12:01:34,600 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f0cbba-56f0-433d-96c4-e5c38fb52084/bin/uautomizer-verify-84ZbGMXZE1/data/8145c3873/caf159b030cb48468674ccd7e207b913/FLAGbcccd2c59 [2024-12-02 12:01:34,787 INFO L384 CDTParser]: Found 1 translation units. [2024-12-02 12:01:34,788 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f0cbba-56f0-433d-96c4-e5c38fb52084/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c [2024-12-02 12:01:34,796 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f0cbba-56f0-433d-96c4-e5c38fb52084/bin/uautomizer-verify-84ZbGMXZE1/data/8145c3873/caf159b030cb48468674ccd7e207b913/FLAGbcccd2c59 [2024-12-02 12:01:35,146 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f0cbba-56f0-433d-96c4-e5c38fb52084/bin/uautomizer-verify-84ZbGMXZE1/data/8145c3873/caf159b030cb48468674ccd7e207b913 [2024-12-02 12:01:35,148 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-12-02 12:01:35,148 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-12-02 12:01:35,149 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-12-02 12:01:35,149 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-12-02 12:01:35,152 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-12-02 12:01:35,153 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:01:35" (1/1) ... [2024-12-02 12:01:35,153 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a28ac7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:01:35, skipping insertion in model container [2024-12-02 12:01:35,153 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:01:35" (1/1) ... [2024-12-02 12:01:35,163 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-12-02 12:01:35,281 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 12:01:35,287 INFO L200 MainTranslator]: Completed pre-run [2024-12-02 12:01:35,302 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 12:01:35,312 INFO L204 MainTranslator]: Completed translation [2024-12-02 12:01:35,312 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:01:35 WrapperNode [2024-12-02 12:01:35,312 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-12-02 12:01:35,313 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-12-02 12:01:35,313 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-12-02 12:01:35,313 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-12-02 12:01:35,317 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:01:35" (1/1) ... [2024-12-02 12:01:35,321 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:01:35" (1/1) ... [2024-12-02 12:01:35,334 INFO L138 Inliner]: procedures = 20, calls = 15, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 43 [2024-12-02 12:01:35,334 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-12-02 12:01:35,335 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-12-02 12:01:35,335 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-12-02 12:01:35,335 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-12-02 12:01:35,340 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:01:35" (1/1) ... [2024-12-02 12:01:35,341 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:01:35" (1/1) ... [2024-12-02 12:01:35,342 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:01:35" (1/1) ... [2024-12-02 12:01:35,350 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-12-02 12:01:35,350 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:01:35" (1/1) ... [2024-12-02 12:01:35,350 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:01:35" (1/1) ... [2024-12-02 12:01:35,353 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:01:35" (1/1) ... [2024-12-02 12:01:35,354 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:01:35" (1/1) ... [2024-12-02 12:01:35,356 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:01:35" (1/1) ... [2024-12-02 12:01:35,357 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:01:35" (1/1) ... [2024-12-02 12:01:35,358 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:01:35" (1/1) ... [2024-12-02 12:01:35,359 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-12-02 12:01:35,359 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-12-02 12:01:35,359 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-12-02 12:01:35,360 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-12-02 12:01:35,360 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:01:35" (1/1) ... [2024-12-02 12:01:35,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 12:01:35,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f0cbba-56f0-433d-96c4-e5c38fb52084/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:01:35,383 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f0cbba-56f0-433d-96c4-e5c38fb52084/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-12-02 12:01:35,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f0cbba-56f0-433d-96c4-e5c38fb52084/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-12-02 12:01:35,407 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-12-02 12:01:35,407 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-12-02 12:01:35,407 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-12-02 12:01:35,407 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-12-02 12:01:35,407 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-12-02 12:01:35,407 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-12-02 12:01:35,407 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-12-02 12:01:35,407 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-12-02 12:01:35,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-12-02 12:01:35,407 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-12-02 12:01:35,408 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-12-02 12:01:35,476 INFO L234 CfgBuilder]: Building ICFG [2024-12-02 12:01:35,478 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-12-02 12:01:35,612 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-12-02 12:01:35,612 INFO L283 CfgBuilder]: Performing block encoding [2024-12-02 12:01:35,738 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-12-02 12:01:35,738 INFO L312 CfgBuilder]: Removed 2 assume(true) statements. [2024-12-02 12:01:35,738 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:01:35 BoogieIcfgContainer [2024-12-02 12:01:35,738 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-12-02 12:01:35,740 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-12-02 12:01:35,740 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-12-02 12:01:35,743 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-12-02 12:01:35,744 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 12:01:35" (1/3) ... [2024-12-02 12:01:35,744 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76cb7ec5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:01:35, skipping insertion in model container [2024-12-02 12:01:35,744 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:01:35" (2/3) ... [2024-12-02 12:01:35,744 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76cb7ec5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:01:35, skipping insertion in model container [2024-12-02 12:01:35,744 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:01:35" (3/3) ... [2024-12-02 12:01:35,745 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr.wvr.c [2024-12-02 12:01:35,756 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-12-02 12:01:35,757 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-nonblocking-cntr.wvr.c that has 3 procedures, 28 locations, 1 initial locations, 2 loop locations, and 8 error locations. [2024-12-02 12:01:35,757 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-12-02 12:01:35,800 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-12-02 12:01:35,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 34 places, 29 transitions, 72 flow [2024-12-02 12:01:35,848 INFO L124 PetriNetUnfolderBase]: 2/27 cut-off events. [2024-12-02 12:01:35,850 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-12-02 12:01:35,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 27 events. 2/27 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 64 event pairs, 0 based on Foata normal form. 0/17 useless extension candidates. Maximal degree in co-relation 24. Up to 2 conditions per place. [2024-12-02 12:01:35,853 INFO L82 GeneralOperation]: Start removeDead. Operand has 34 places, 29 transitions, 72 flow [2024-12-02 12:01:35,856 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 25 transitions, 59 flow [2024-12-02 12:01:35,863 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-12-02 12:01:35,872 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=LoopHeads, 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;@28fc3803, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-12-02 12:01:35,872 INFO L334 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2024-12-02 12:01:35,877 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-12-02 12:01:35,877 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2024-12-02 12:01:35,877 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-12-02 12:01:35,877 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:01:35,878 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-12-02 12:01:35,878 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2024-12-02 12:01:35,882 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:01:35,882 INFO L85 PathProgramCache]: Analyzing trace with hash 263122082, now seen corresponding path program 1 times [2024-12-02 12:01:35,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:01:35,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907735013] [2024-12-02 12:01:35,889 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:01:35,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:01:35,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:01:36,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:01:36,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:01:36,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907735013] [2024-12-02 12:01:36,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907735013] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:01:36,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:01:36,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-12-02 12:01:36,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924769765] [2024-12-02 12:01:36,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:01:36,054 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 12:01:36,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:01:36,073 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 12:01:36,074 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 12:01:36,075 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 29 [2024-12-02 12:01:36,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 25 transitions, 59 flow. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:01:36,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:01:36,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 29 [2024-12-02 12:01:36,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:01:36,217 INFO L124 PetriNetUnfolderBase]: 143/291 cut-off events. [2024-12-02 12:01:36,217 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2024-12-02 12:01:36,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 569 conditions, 291 events. 143/291 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1212 event pairs, 49 based on Foata normal form. 0/218 useless extension candidates. Maximal degree in co-relation 514. Up to 191 conditions per place. [2024-12-02 12:01:36,221 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 23 selfloop transitions, 2 changer transitions 2/33 dead transitions. [2024-12-02 12:01:36,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 33 transitions, 135 flow [2024-12-02 12:01:36,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 12:01:36,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 12:01:36,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 58 transitions. [2024-12-02 12:01:36,233 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-12-02 12:01:36,235 INFO L175 Difference]: Start difference. First operand has 30 places, 25 transitions, 59 flow. Second operand 3 states and 58 transitions. [2024-12-02 12:01:36,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 33 transitions, 135 flow [2024-12-02 12:01:36,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 33 transitions, 127 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-12-02 12:01:36,242 INFO L231 Difference]: Finished difference. Result has 29 places, 25 transitions, 72 flow [2024-12-02 12:01:36,244 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=29, PETRI_TRANSITIONS=25} [2024-12-02 12:01:36,248 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, -1 predicate places. [2024-12-02 12:01:36,248 INFO L471 AbstractCegarLoop]: Abstraction has has 29 places, 25 transitions, 72 flow [2024-12-02 12:01:36,248 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:01:36,248 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:01:36,248 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:01:36,248 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-12-02 12:01:36,249 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2024-12-02 12:01:36,249 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:01:36,249 INFO L85 PathProgramCache]: Analyzing trace with hash -542739611, now seen corresponding path program 1 times [2024-12-02 12:01:36,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:01:36,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617559813] [2024-12-02 12:01:36,249 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:01:36,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:01:36,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:01:36,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:01:36,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:01:36,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617559813] [2024-12-02 12:01:36,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617559813] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:01:36,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:01:36,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 12:01:36,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138210345] [2024-12-02 12:01:36,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:01:36,325 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 12:01:36,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:01:36,325 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 12:01:36,326 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 12:01:36,337 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-12-02 12:01:36,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 25 transitions, 72 flow. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:01:36,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:01:36,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-12-02 12:01:36,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:01:36,514 INFO L124 PetriNetUnfolderBase]: 243/463 cut-off events. [2024-12-02 12:01:36,514 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2024-12-02 12:01:36,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1033 conditions, 463 events. 243/463 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2152 event pairs, 111 based on Foata normal form. 14/382 useless extension candidates. Maximal degree in co-relation 531. Up to 337 conditions per place. [2024-12-02 12:01:36,518 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 39 selfloop transitions, 3 changer transitions 1/46 dead transitions. [2024-12-02 12:01:36,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 46 transitions, 216 flow [2024-12-02 12:01:36,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 12:01:36,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 12:01:36,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 65 transitions. [2024-12-02 12:01:36,520 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5603448275862069 [2024-12-02 12:01:36,520 INFO L175 Difference]: Start difference. First operand has 29 places, 25 transitions, 72 flow. Second operand 4 states and 65 transitions. [2024-12-02 12:01:36,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 46 transitions, 216 flow [2024-12-02 12:01:36,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 46 transitions, 214 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-12-02 12:01:36,522 INFO L231 Difference]: Finished difference. Result has 33 places, 27 transitions, 94 flow [2024-12-02 12:01:36,522 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=94, PETRI_PLACES=33, PETRI_TRANSITIONS=27} [2024-12-02 12:01:36,523 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 3 predicate places. [2024-12-02 12:01:36,523 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 27 transitions, 94 flow [2024-12-02 12:01:36,523 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:01:36,523 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:01:36,523 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:01:36,523 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-12-02 12:01:36,523 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2024-12-02 12:01:36,524 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:01:36,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1316019562, now seen corresponding path program 1 times [2024-12-02 12:01:36,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:01:36,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852473379] [2024-12-02 12:01:36,524 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:01:36,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:01:36,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:01:36,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:01:36,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:01:36,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852473379] [2024-12-02 12:01:36,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852473379] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:01:36,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:01:36,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 12:01:36,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969721345] [2024-12-02 12:01:36,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:01:36,577 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 12:01:36,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:01:36,578 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 12:01:36,578 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 12:01:36,578 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 29 [2024-12-02 12:01:36,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 27 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:01:36,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:01:36,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 29 [2024-12-02 12:01:36,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:01:36,634 INFO L124 PetriNetUnfolderBase]: 130/247 cut-off events. [2024-12-02 12:01:36,634 INFO L125 PetriNetUnfolderBase]: For 89/108 co-relation queries the response was YES. [2024-12-02 12:01:36,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 631 conditions, 247 events. 130/247 cut-off events. For 89/108 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1037 event pairs, 101 based on Foata normal form. 7/197 useless extension candidates. Maximal degree in co-relation 389. Up to 224 conditions per place. [2024-12-02 12:01:36,637 INFO L140 encePairwiseOnDemand]: 27/29 looper letters, 18 selfloop transitions, 1 changer transitions 0/26 dead transitions. [2024-12-02 12:01:36,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 26 transitions, 128 flow [2024-12-02 12:01:36,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 12:01:36,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 12:01:36,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 42 transitions. [2024-12-02 12:01:36,638 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4827586206896552 [2024-12-02 12:01:36,638 INFO L175 Difference]: Start difference. First operand has 33 places, 27 transitions, 94 flow. Second operand 3 states and 42 transitions. [2024-12-02 12:01:36,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 26 transitions, 128 flow [2024-12-02 12:01:36,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 26 transitions, 126 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-12-02 12:01:36,639 INFO L231 Difference]: Finished difference. Result has 33 places, 26 transitions, 90 flow [2024-12-02 12:01:36,639 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=33, PETRI_TRANSITIONS=26} [2024-12-02 12:01:36,640 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 3 predicate places. [2024-12-02 12:01:36,640 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 26 transitions, 90 flow [2024-12-02 12:01:36,640 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:01:36,640 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:01:36,640 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:01:36,640 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-12-02 12:01:36,641 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2024-12-02 12:01:36,641 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:01:36,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1321283163, now seen corresponding path program 1 times [2024-12-02 12:01:36,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:01:36,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704773372] [2024-12-02 12:01:36,641 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:01:36,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:01:36,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:01:36,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:01:36,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:01:36,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704773372] [2024-12-02 12:01:36,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704773372] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:01:36,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:01:36,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 12:01:36,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543459839] [2024-12-02 12:01:36,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:01:36,691 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 12:01:36,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:01:36,691 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 12:01:36,691 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 12:01:36,693 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 29 [2024-12-02 12:01:36,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 26 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:01:36,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:01:36,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 29 [2024-12-02 12:01:36,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:01:36,786 INFO L124 PetriNetUnfolderBase]: 180/340 cut-off events. [2024-12-02 12:01:36,786 INFO L125 PetriNetUnfolderBase]: For 113/150 co-relation queries the response was YES. [2024-12-02 12:01:36,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 824 conditions, 340 events. 180/340 cut-off events. For 113/150 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1580 event pairs, 101 based on Foata normal form. 26/303 useless extension candidates. Maximal degree in co-relation 814. Up to 225 conditions per place. [2024-12-02 12:01:36,789 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 29 selfloop transitions, 2 changer transitions 0/38 dead transitions. [2024-12-02 12:01:36,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 38 transitions, 193 flow [2024-12-02 12:01:36,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 12:01:36,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 12:01:36,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 53 transitions. [2024-12-02 12:01:36,790 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6091954022988506 [2024-12-02 12:01:36,790 INFO L175 Difference]: Start difference. First operand has 33 places, 26 transitions, 90 flow. Second operand 3 states and 53 transitions. [2024-12-02 12:01:36,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 38 transitions, 193 flow [2024-12-02 12:01:36,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 38 transitions, 192 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-12-02 12:01:36,792 INFO L231 Difference]: Finished difference. Result has 35 places, 27 transitions, 103 flow [2024-12-02 12:01:36,792 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=103, PETRI_PLACES=35, PETRI_TRANSITIONS=27} [2024-12-02 12:01:36,792 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 5 predicate places. [2024-12-02 12:01:36,792 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 27 transitions, 103 flow [2024-12-02 12:01:36,793 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:01:36,793 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:01:36,793 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:01:36,793 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-12-02 12:01:36,793 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2024-12-02 12:01:36,793 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:01:36,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1796403838, now seen corresponding path program 1 times [2024-12-02 12:01:36,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:01:36,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383594649] [2024-12-02 12:01:36,794 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:01:36,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:01:36,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:01:36,829 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:01:36,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:01:36,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383594649] [2024-12-02 12:01:36,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383594649] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:01:36,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:01:36,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 12:01:36,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193101001] [2024-12-02 12:01:36,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:01:36,830 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 12:01:36,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:01:36,831 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 12:01:36,831 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 12:01:36,831 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 29 [2024-12-02 12:01:36,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 27 transitions, 103 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:01:36,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:01:36,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 29 [2024-12-02 12:01:36,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:01:36,888 INFO L124 PetriNetUnfolderBase]: 157/289 cut-off events. [2024-12-02 12:01:36,888 INFO L125 PetriNetUnfolderBase]: For 181/218 co-relation queries the response was YES. [2024-12-02 12:01:36,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 795 conditions, 289 events. 157/289 cut-off events. For 181/218 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1220 event pairs, 126 based on Foata normal form. 13/253 useless extension candidates. Maximal degree in co-relation 784. Up to 269 conditions per place. [2024-12-02 12:01:36,890 INFO L140 encePairwiseOnDemand]: 27/29 looper letters, 18 selfloop transitions, 1 changer transitions 0/26 dead transitions. [2024-12-02 12:01:36,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 26 transitions, 137 flow [2024-12-02 12:01:36,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 12:01:36,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 12:01:36,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 41 transitions. [2024-12-02 12:01:36,891 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47126436781609193 [2024-12-02 12:01:36,891 INFO L175 Difference]: Start difference. First operand has 35 places, 27 transitions, 103 flow. Second operand 3 states and 41 transitions. [2024-12-02 12:01:36,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 26 transitions, 137 flow [2024-12-02 12:01:36,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 26 transitions, 135 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-12-02 12:01:36,893 INFO L231 Difference]: Finished difference. Result has 35 places, 26 transitions, 99 flow [2024-12-02 12:01:36,893 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=99, PETRI_PLACES=35, PETRI_TRANSITIONS=26} [2024-12-02 12:01:36,893 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 5 predicate places. [2024-12-02 12:01:36,893 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 26 transitions, 99 flow [2024-12-02 12:01:36,894 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:01:36,894 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:01:36,894 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:01:36,894 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-12-02 12:01:36,894 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2024-12-02 12:01:36,894 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:01:36,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1796403839, now seen corresponding path program 1 times [2024-12-02 12:01:36,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:01:36,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565471201] [2024-12-02 12:01:36,895 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:01:36,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:01:36,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:01:36,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:01:36,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:01:36,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565471201] [2024-12-02 12:01:36,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565471201] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:01:36,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311228061] [2024-12-02 12:01:36,940 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:01:36,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:01:36,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f0cbba-56f0-433d-96c4-e5c38fb52084/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:01:36,942 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f0cbba-56f0-433d-96c4-e5c38fb52084/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:01:36,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f0cbba-56f0-433d-96c4-e5c38fb52084/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-12-02 12:01:36,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:01:36,984 INFO L256 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-12-02 12:01:36,987 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:01:37,035 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:01:37,036 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:01:37,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:01:37,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311228061] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:01:37,066 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:01:37,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2024-12-02 12:01:37,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997083466] [2024-12-02 12:01:37,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:01:37,067 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-12-02 12:01:37,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:01:37,068 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-12-02 12:01:37,068 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-12-02 12:01:37,068 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 29 [2024-12-02 12:01:37,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 26 transitions, 99 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:01:37,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:01:37,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 29 [2024-12-02 12:01:37,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:01:37,301 INFO L124 PetriNetUnfolderBase]: 406/1005 cut-off events. [2024-12-02 12:01:37,301 INFO L125 PetriNetUnfolderBase]: For 411/423 co-relation queries the response was YES. [2024-12-02 12:01:37,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2436 conditions, 1005 events. 406/1005 cut-off events. For 411/423 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 5747 event pairs, 37 based on Foata normal form. 17/962 useless extension candidates. Maximal degree in co-relation 2424. Up to 187 conditions per place. [2024-12-02 12:01:37,307 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 61 selfloop transitions, 15 changer transitions 2/85 dead transitions. [2024-12-02 12:01:37,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 85 transitions, 470 flow [2024-12-02 12:01:37,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-12-02 12:01:37,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-12-02 12:01:37,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-12-02 12:01:37,309 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6502463054187192 [2024-12-02 12:01:37,309 INFO L175 Difference]: Start difference. First operand has 35 places, 26 transitions, 99 flow. Second operand 7 states and 132 transitions. [2024-12-02 12:01:37,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 85 transitions, 470 flow [2024-12-02 12:01:37,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 85 transitions, 469 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-12-02 12:01:37,312 INFO L231 Difference]: Finished difference. Result has 45 places, 39 transitions, 248 flow [2024-12-02 12:01:37,312 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=248, PETRI_PLACES=45, PETRI_TRANSITIONS=39} [2024-12-02 12:01:37,312 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 15 predicate places. [2024-12-02 12:01:37,313 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 39 transitions, 248 flow [2024-12-02 12:01:37,313 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:01:37,313 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:01:37,313 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:01:37,322 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f0cbba-56f0-433d-96c4-e5c38fb52084/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-12-02 12:01:37,513 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f0cbba-56f0-433d-96c4-e5c38fb52084/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-12-02 12:01:37,513 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2024-12-02 12:01:37,514 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:01:37,514 INFO L85 PathProgramCache]: Analyzing trace with hash 256660875, now seen corresponding path program 1 times [2024-12-02 12:01:37,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:01:37,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653571779] [2024-12-02 12:01:37,514 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:01:37,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:01:37,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:01:37,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:01:37,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:01:37,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653571779] [2024-12-02 12:01:37,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653571779] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:01:37,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860185687] [2024-12-02 12:01:37,614 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:01:37,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:01:37,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f0cbba-56f0-433d-96c4-e5c38fb52084/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:01:37,616 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f0cbba-56f0-433d-96c4-e5c38fb52084/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:01:37,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f0cbba-56f0-433d-96c4-e5c38fb52084/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-12-02 12:01:37,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:01:37,662 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-12-02 12:01:37,663 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:01:37,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:01:37,710 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:01:37,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:01:37,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860185687] provided 1 perfect and 1 imperfect interpolant sequences [2024-12-02 12:01:37,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-12-02 12:01:37,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 9 [2024-12-02 12:01:37,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983577209] [2024-12-02 12:01:37,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:01:37,757 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 12:01:37,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:01:37,757 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 12:01:37,757 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-12-02 12:01:37,760 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 29 [2024-12-02 12:01:37,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 39 transitions, 248 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:01:37,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:01:37,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 29 [2024-12-02 12:01:37,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:01:37,882 INFO L124 PetriNetUnfolderBase]: 358/768 cut-off events. [2024-12-02 12:01:37,883 INFO L125 PetriNetUnfolderBase]: For 1473/1534 co-relation queries the response was YES. [2024-12-02 12:01:37,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2347 conditions, 768 events. 358/768 cut-off events. For 1473/1534 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 3935 event pairs, 68 based on Foata normal form. 11/761 useless extension candidates. Maximal degree in co-relation 2329. Up to 510 conditions per place. [2024-12-02 12:01:37,888 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 41 selfloop transitions, 4 changer transitions 0/52 dead transitions. [2024-12-02 12:01:37,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 52 transitions, 390 flow [2024-12-02 12:01:37,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 12:01:37,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 12:01:37,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 59 transitions. [2024-12-02 12:01:37,889 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5086206896551724 [2024-12-02 12:01:37,889 INFO L175 Difference]: Start difference. First operand has 45 places, 39 transitions, 248 flow. Second operand 4 states and 59 transitions. [2024-12-02 12:01:37,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 52 transitions, 390 flow [2024-12-02 12:01:37,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 52 transitions, 376 flow, removed 7 selfloop flow, removed 0 redundant places. [2024-12-02 12:01:37,895 INFO L231 Difference]: Finished difference. Result has 49 places, 39 transitions, 246 flow [2024-12-02 12:01:37,895 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=246, PETRI_PLACES=49, PETRI_TRANSITIONS=39} [2024-12-02 12:01:37,895 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 19 predicate places. [2024-12-02 12:01:37,895 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 39 transitions, 246 flow [2024-12-02 12:01:37,896 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:01:37,896 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:01:37,896 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:01:37,904 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f0cbba-56f0-433d-96c4-e5c38fb52084/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-12-02 12:01:38,096 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f0cbba-56f0-433d-96c4-e5c38fb52084/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:01:38,096 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2024-12-02 12:01:38,097 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:01:38,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1068635144, now seen corresponding path program 1 times [2024-12-02 12:01:38,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:01:38,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758726820] [2024-12-02 12:01:38,097 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:01:38,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:01:38,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:01:38,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:01:38,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:01:38,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758726820] [2024-12-02 12:01:38,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758726820] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:01:38,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587065260] [2024-12-02 12:01:38,172 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:01:38,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:01:38,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f0cbba-56f0-433d-96c4-e5c38fb52084/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:01:38,174 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f0cbba-56f0-433d-96c4-e5c38fb52084/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:01:38,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f0cbba-56f0-433d-96c4-e5c38fb52084/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-12-02 12:01:38,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:01:38,224 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-12-02 12:01:38,225 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:01:38,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 12:01:38,261 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 12:01:38,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587065260] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:01:38,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 12:01:38,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2024-12-02 12:01:38,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854379008] [2024-12-02 12:01:38,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:01:38,262 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 12:01:38,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:01:38,262 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 12:01:38,262 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-12-02 12:01:38,264 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-12-02 12:01:38,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 39 transitions, 246 flow. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:01:38,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:01:38,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-12-02 12:01:38,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:01:38,406 INFO L124 PetriNetUnfolderBase]: 423/785 cut-off events. [2024-12-02 12:01:38,406 INFO L125 PetriNetUnfolderBase]: For 1419/1500 co-relation queries the response was YES. [2024-12-02 12:01:38,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2447 conditions, 785 events. 423/785 cut-off events. For 1419/1500 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 3760 event pairs, 145 based on Foata normal form. 38/726 useless extension candidates. Maximal degree in co-relation 2427. Up to 366 conditions per place. [2024-12-02 12:01:38,412 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 30 selfloop transitions, 10 changer transitions 4/50 dead transitions. [2024-12-02 12:01:38,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 50 transitions, 378 flow [2024-12-02 12:01:38,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 12:01:38,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 12:01:38,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 53 transitions. [2024-12-02 12:01:38,413 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45689655172413796 [2024-12-02 12:01:38,413 INFO L175 Difference]: Start difference. First operand has 49 places, 39 transitions, 246 flow. Second operand 4 states and 53 transitions. [2024-12-02 12:01:38,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 50 transitions, 378 flow [2024-12-02 12:01:38,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 50 transitions, 360 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-12-02 12:01:38,418 INFO L231 Difference]: Finished difference. Result has 50 places, 34 transitions, 225 flow [2024-12-02 12:01:38,419 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=225, PETRI_PLACES=50, PETRI_TRANSITIONS=34} [2024-12-02 12:01:38,419 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 20 predicate places. [2024-12-02 12:01:38,419 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 34 transitions, 225 flow [2024-12-02 12:01:38,419 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:01:38,420 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:01:38,420 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-12-02 12:01:38,428 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f0cbba-56f0-433d-96c4-e5c38fb52084/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-12-02 12:01:38,620 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f0cbba-56f0-433d-96c4-e5c38fb52084/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:01:38,620 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2024-12-02 12:01:38,621 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:01:38,621 INFO L85 PathProgramCache]: Analyzing trace with hash -232754623, now seen corresponding path program 1 times [2024-12-02 12:01:38,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:01:38,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860407128] [2024-12-02 12:01:38,621 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:01:38,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:01:38,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:01:38,680 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:01:38,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:01:38,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860407128] [2024-12-02 12:01:38,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860407128] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:01:38,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659745711] [2024-12-02 12:01:38,681 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:01:38,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:01:38,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f0cbba-56f0-433d-96c4-e5c38fb52084/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:01:38,683 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f0cbba-56f0-433d-96c4-e5c38fb52084/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:01:38,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f0cbba-56f0-433d-96c4-e5c38fb52084/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-12-02 12:01:38,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:01:38,725 INFO L256 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-12-02 12:01:38,726 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:01:38,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:01:38,759 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 12:01:38,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659745711] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:01:38,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 12:01:38,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2024-12-02 12:01:38,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607836863] [2024-12-02 12:01:38,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:01:38,760 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 12:01:38,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:01:38,761 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 12:01:38,761 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-12-02 12:01:38,773 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-12-02 12:01:38,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 34 transitions, 225 flow. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:01:38,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:01:38,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-12-02 12:01:38,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:01:38,979 INFO L124 PetriNetUnfolderBase]: 362/747 cut-off events. [2024-12-02 12:01:38,979 INFO L125 PetriNetUnfolderBase]: For 2089/2122 co-relation queries the response was YES. [2024-12-02 12:01:38,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2392 conditions, 747 events. 362/747 cut-off events. For 2089/2122 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 3249 event pairs, 4 based on Foata normal form. 44/745 useless extension candidates. Maximal degree in co-relation 2371. Up to 281 conditions per place. [2024-12-02 12:01:38,985 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 58 selfloop transitions, 5 changer transitions 0/67 dead transitions. [2024-12-02 12:01:38,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 67 transitions, 589 flow [2024-12-02 12:01:38,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 12:01:38,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-12-02 12:01:38,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 72 transitions. [2024-12-02 12:01:38,987 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41379310344827586 [2024-12-02 12:01:38,987 INFO L175 Difference]: Start difference. First operand has 50 places, 34 transitions, 225 flow. Second operand 6 states and 72 transitions. [2024-12-02 12:01:38,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 67 transitions, 589 flow [2024-12-02 12:01:38,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 67 transitions, 561 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-12-02 12:01:38,992 INFO L231 Difference]: Finished difference. Result has 50 places, 33 transitions, 221 flow [2024-12-02 12:01:38,992 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=221, PETRI_PLACES=50, PETRI_TRANSITIONS=33} [2024-12-02 12:01:38,992 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 20 predicate places. [2024-12-02 12:01:38,993 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 33 transitions, 221 flow [2024-12-02 12:01:38,993 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:01:38,993 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:01:38,993 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-12-02 12:01:39,001 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f0cbba-56f0-433d-96c4-e5c38fb52084/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-12-02 12:01:39,193 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f0cbba-56f0-433d-96c4-e5c38fb52084/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:01:39,193 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2024-12-02 12:01:39,194 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:01:39,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1374541567, now seen corresponding path program 1 times [2024-12-02 12:01:39,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:01:39,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358202629] [2024-12-02 12:01:39,194 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:01:39,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:01:39,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:01:39,251 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:01:39,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:01:39,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358202629] [2024-12-02 12:01:39,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358202629] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:01:39,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420302340] [2024-12-02 12:01:39,251 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:01:39,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:01:39,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f0cbba-56f0-433d-96c4-e5c38fb52084/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:01:39,253 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f0cbba-56f0-433d-96c4-e5c38fb52084/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:01:39,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f0cbba-56f0-433d-96c4-e5c38fb52084/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-12-02 12:01:39,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:01:39,291 INFO L256 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-12-02 12:01:39,292 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:01:39,323 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:01:39,323 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:01:39,368 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:01:39,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420302340] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:01:39,369 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:01:39,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-12-02 12:01:39,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401363485] [2024-12-02 12:01:39,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:01:39,369 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-12-02 12:01:39,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:01:39,370 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-12-02 12:01:39,370 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-12-02 12:01:39,392 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-12-02 12:01:39,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 33 transitions, 221 flow. Second operand has 12 states, 12 states have (on average 6.666666666666667) internal successors, (80), 12 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:01:39,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:01:39,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-12-02 12:01:39,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:01:39,706 INFO L124 PetriNetUnfolderBase]: 560/1156 cut-off events. [2024-12-02 12:01:39,707 INFO L125 PetriNetUnfolderBase]: For 2826/2855 co-relation queries the response was YES. [2024-12-02 12:01:39,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3778 conditions, 1156 events. 560/1156 cut-off events. For 2826/2855 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 5413 event pairs, 134 based on Foata normal form. 72/1220 useless extension candidates. Maximal degree in co-relation 3757. Up to 356 conditions per place. [2024-12-02 12:01:39,716 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 105 selfloop transitions, 9 changer transitions 0/118 dead transitions. [2024-12-02 12:01:39,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 118 transitions, 1006 flow [2024-12-02 12:01:39,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-12-02 12:01:39,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-12-02 12:01:39,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 127 transitions. [2024-12-02 12:01:39,717 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4379310344827586 [2024-12-02 12:01:39,717 INFO L175 Difference]: Start difference. First operand has 50 places, 33 transitions, 221 flow. Second operand 10 states and 127 transitions. [2024-12-02 12:01:39,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 118 transitions, 1006 flow [2024-12-02 12:01:39,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 118 transitions, 991 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-12-02 12:01:39,723 INFO L231 Difference]: Finished difference. Result has 58 places, 39 transitions, 276 flow [2024-12-02 12:01:39,724 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=276, PETRI_PLACES=58, PETRI_TRANSITIONS=39} [2024-12-02 12:01:39,724 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 28 predicate places. [2024-12-02 12:01:39,724 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 39 transitions, 276 flow [2024-12-02 12:01:39,724 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.666666666666667) internal successors, (80), 12 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:01:39,724 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:01:39,724 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1] [2024-12-02 12:01:39,733 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f0cbba-56f0-433d-96c4-e5c38fb52084/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-12-02 12:01:39,925 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f0cbba-56f0-433d-96c4-e5c38fb52084/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-12-02 12:01:39,925 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2024-12-02 12:01:39,925 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:01:39,926 INFO L85 PathProgramCache]: Analyzing trace with hash 185311139, now seen corresponding path program 2 times [2024-12-02 12:01:39,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:01:39,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193589175] [2024-12-02 12:01:39,926 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 12:01:39,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:01:39,939 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 12:01:39,939 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:01:40,049 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:01:40,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:01:40,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193589175] [2024-12-02 12:01:40,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193589175] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:01:40,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120480957] [2024-12-02 12:01:40,049 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 12:01:40,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:01:40,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f0cbba-56f0-433d-96c4-e5c38fb52084/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:01:40,051 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f0cbba-56f0-433d-96c4-e5c38fb52084/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:01:40,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f0cbba-56f0-433d-96c4-e5c38fb52084/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-12-02 12:01:40,093 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 12:01:40,094 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:01:40,094 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-12-02 12:01:40,096 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:01:40,139 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:01:40,139 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:01:40,231 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:01:40,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120480957] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:01:40,231 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:01:40,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-12-02 12:01:40,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362147289] [2024-12-02 12:01:40,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:01:40,232 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-12-02 12:01:40,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:01:40,232 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-12-02 12:01:40,232 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-12-02 12:01:40,233 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 29 [2024-12-02 12:01:40,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 39 transitions, 276 flow. Second operand has 13 states, 13 states have (on average 10.153846153846153) internal successors, (132), 13 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:01:40,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:01:40,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 29 [2024-12-02 12:01:40,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:01:40,581 INFO L124 PetriNetUnfolderBase]: 759/1968 cut-off events. [2024-12-02 12:01:40,581 INFO L125 PetriNetUnfolderBase]: For 7261/7363 co-relation queries the response was YES. [2024-12-02 12:01:40,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6688 conditions, 1968 events. 759/1968 cut-off events. For 7261/7363 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 11642 event pairs, 29 based on Foata normal form. 88/2037 useless extension candidates. Maximal degree in co-relation 6665. Up to 365 conditions per place. [2024-12-02 12:01:40,596 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 96 selfloop transitions, 40 changer transitions 0/146 dead transitions. [2024-12-02 12:01:40,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 146 transitions, 1222 flow [2024-12-02 12:01:40,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-12-02 12:01:40,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-12-02 12:01:40,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 210 transitions. [2024-12-02 12:01:40,597 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5570291777188329 [2024-12-02 12:01:40,597 INFO L175 Difference]: Start difference. First operand has 58 places, 39 transitions, 276 flow. Second operand 13 states and 210 transitions. [2024-12-02 12:01:40,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 146 transitions, 1222 flow [2024-12-02 12:01:40,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 146 transitions, 1193 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-12-02 12:01:40,609 INFO L231 Difference]: Finished difference. Result has 78 places, 74 transitions, 762 flow [2024-12-02 12:01:40,609 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=762, PETRI_PLACES=78, PETRI_TRANSITIONS=74} [2024-12-02 12:01:40,609 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 48 predicate places. [2024-12-02 12:01:40,609 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 74 transitions, 762 flow [2024-12-02 12:01:40,610 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.153846153846153) internal successors, (132), 13 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:01:40,610 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:01:40,610 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1] [2024-12-02 12:01:40,618 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f0cbba-56f0-433d-96c4-e5c38fb52084/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-12-02 12:01:40,810 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f0cbba-56f0-433d-96c4-e5c38fb52084/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-12-02 12:01:40,810 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2024-12-02 12:01:40,810 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:01:40,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1571448667, now seen corresponding path program 2 times [2024-12-02 12:01:40,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:01:40,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126488072] [2024-12-02 12:01:40,811 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 12:01:40,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:01:40,817 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-12-02 12:01:40,817 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:01:40,842 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-12-02 12:01:40,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:01:40,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126488072] [2024-12-02 12:01:40,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126488072] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:01:40,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609735214] [2024-12-02 12:01:40,842 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 12:01:40,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:01:40,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f0cbba-56f0-433d-96c4-e5c38fb52084/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:01:40,844 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f0cbba-56f0-433d-96c4-e5c38fb52084/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:01:40,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f0cbba-56f0-433d-96c4-e5c38fb52084/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-12-02 12:01:40,883 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-12-02 12:01:40,883 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:01:40,884 INFO L256 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-12-02 12:01:40,885 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:01:40,925 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-12-02 12:01:40,925 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:01:40,963 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-12-02 12:01:40,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609735214] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:01:40,963 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:01:40,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2024-12-02 12:01:40,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110683905] [2024-12-02 12:01:40,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:01:40,964 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 12:01:40,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:01:40,964 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 12:01:40,964 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-12-02 12:01:40,978 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-12-02 12:01:40,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 74 transitions, 762 flow. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:01:40,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:01:40,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-12-02 12:01:40,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:01:41,355 INFO L124 PetriNetUnfolderBase]: 1482/2820 cut-off events. [2024-12-02 12:01:41,356 INFO L125 PetriNetUnfolderBase]: For 13491/13582 co-relation queries the response was YES. [2024-12-02 12:01:41,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10695 conditions, 2820 events. 1482/2820 cut-off events. For 13491/13582 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 13960 event pairs, 230 based on Foata normal form. 126/2943 useless extension candidates. Maximal degree in co-relation 10660. Up to 1240 conditions per place. [2024-12-02 12:01:41,377 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 120 selfloop transitions, 13 changer transitions 0/136 dead transitions. [2024-12-02 12:01:41,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 136 transitions, 1766 flow [2024-12-02 12:01:41,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 12:01:41,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-02 12:01:41,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 48 transitions. [2024-12-02 12:01:41,379 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3310344827586207 [2024-12-02 12:01:41,379 INFO L175 Difference]: Start difference. First operand has 78 places, 74 transitions, 762 flow. Second operand 5 states and 48 transitions. [2024-12-02 12:01:41,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 136 transitions, 1766 flow [2024-12-02 12:01:41,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 136 transitions, 1515 flow, removed 117 selfloop flow, removed 6 redundant places. [2024-12-02 12:01:41,406 INFO L231 Difference]: Finished difference. Result has 76 places, 74 transitions, 671 flow [2024-12-02 12:01:41,406 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=633, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=671, PETRI_PLACES=76, PETRI_TRANSITIONS=74} [2024-12-02 12:01:41,406 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 46 predicate places. [2024-12-02 12:01:41,406 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 74 transitions, 671 flow [2024-12-02 12:01:41,407 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:01:41,407 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:01:41,407 INFO L206 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 10, 10, 1, 1, 1, 1] [2024-12-02 12:01:41,415 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f0cbba-56f0-433d-96c4-e5c38fb52084/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-12-02 12:01:41,607 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f0cbba-56f0-433d-96c4-e5c38fb52084/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-12-02 12:01:41,607 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2024-12-02 12:01:41,608 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:01:41,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1703844899, now seen corresponding path program 3 times [2024-12-02 12:01:41,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:01:41,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30835003] [2024-12-02 12:01:41,608 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 12:01:41,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:01:41,630 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-12-02 12:01:41,630 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:01:41,833 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:01:41,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:01:41,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30835003] [2024-12-02 12:01:41,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30835003] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:01:41,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073386655] [2024-12-02 12:01:41,834 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 12:01:41,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:01:41,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f0cbba-56f0-433d-96c4-e5c38fb52084/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:01:41,836 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f0cbba-56f0-433d-96c4-e5c38fb52084/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:01:41,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f0cbba-56f0-433d-96c4-e5c38fb52084/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-12-02 12:01:41,894 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-12-02 12:01:41,894 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:01:41,895 INFO L256 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-12-02 12:01:41,896 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:01:41,972 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:01:41,972 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:01:42,207 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:01:42,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073386655] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:01:42,207 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:01:42,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2024-12-02 12:01:42,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032909658] [2024-12-02 12:01:42,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:01:42,208 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-12-02 12:01:42,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:01:42,209 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-12-02 12:01:42,209 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-12-02 12:01:42,209 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 29 [2024-12-02 12:01:42,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 74 transitions, 671 flow. Second operand has 25 states, 25 states have (on average 10.08) internal successors, (252), 25 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:01:42,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:01:42,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 29 [2024-12-02 12:01:42,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:01:42,915 INFO L124 PetriNetUnfolderBase]: 1587/4029 cut-off events. [2024-12-02 12:01:42,915 INFO L125 PetriNetUnfolderBase]: For 34758/34914 co-relation queries the response was YES. [2024-12-02 12:01:42,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14569 conditions, 4029 events. 1587/4029 cut-off events. For 34758/34914 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 22943 event pairs, 31 based on Foata normal form. 184/4180 useless extension candidates. Maximal degree in co-relation 14537. Up to 803 conditions per place. [2024-12-02 12:01:42,933 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 170 selfloop transitions, 144 changer transitions 0/324 dead transitions. [2024-12-02 12:01:42,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 324 transitions, 2977 flow [2024-12-02 12:01:42,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-12-02 12:01:42,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-12-02 12:01:42,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 414 transitions. [2024-12-02 12:01:42,935 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5710344827586207 [2024-12-02 12:01:42,936 INFO L175 Difference]: Start difference. First operand has 76 places, 74 transitions, 671 flow. Second operand 25 states and 414 transitions. [2024-12-02 12:01:42,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 324 transitions, 2977 flow [2024-12-02 12:01:42,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 324 transitions, 2927 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-12-02 12:01:42,962 INFO L231 Difference]: Finished difference. Result has 119 places, 180 transitions, 2232 flow [2024-12-02 12:01:42,962 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=653, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=2232, PETRI_PLACES=119, PETRI_TRANSITIONS=180} [2024-12-02 12:01:42,963 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 89 predicate places. [2024-12-02 12:01:42,963 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 180 transitions, 2232 flow [2024-12-02 12:01:42,963 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 10.08) internal successors, (252), 25 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:01:42,963 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:01:42,963 INFO L206 CegarLoopForPetriNet]: trace histogram [23, 22, 22, 22, 22, 1, 1, 1, 1] [2024-12-02 12:01:42,971 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f0cbba-56f0-433d-96c4-e5c38fb52084/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-12-02 12:01:43,163 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f0cbba-56f0-433d-96c4-e5c38fb52084/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-12-02 12:01:43,164 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2024-12-02 12:01:43,164 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:01:43,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1785066787, now seen corresponding path program 4 times [2024-12-02 12:01:43,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:01:43,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096663427] [2024-12-02 12:01:43,164 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 12:01:43,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:01:43,198 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 12:01:43,198 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:01:43,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 1199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:01:43,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:01:43,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096663427] [2024-12-02 12:01:43,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096663427] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:01:43,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491731067] [2024-12-02 12:01:43,836 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 12:01:43,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:01:43,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f0cbba-56f0-433d-96c4-e5c38fb52084/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:01:43,838 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f0cbba-56f0-433d-96c4-e5c38fb52084/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:01:43,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f0cbba-56f0-433d-96c4-e5c38fb52084/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-12-02 12:01:43,912 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 12:01:43,912 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:01:43,914 INFO L256 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-12-02 12:01:43,917 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:01:44,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 1199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:01:44,065 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:01:44,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 1199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:01:44,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491731067] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:01:44,814 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:01:44,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 47 [2024-12-02 12:01:44,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521677285] [2024-12-02 12:01:44,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:01:44,815 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-12-02 12:01:44,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:01:44,816 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-12-02 12:01:44,818 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2024-12-02 12:01:44,818 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 29 [2024-12-02 12:01:44,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 180 transitions, 2232 flow. Second operand has 49 states, 49 states have (on average 10.040816326530612) internal successors, (492), 49 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:01:44,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:01:44,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 29 [2024-12-02 12:01:44,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:01:47,230 INFO L124 PetriNetUnfolderBase]: 4119/10679 cut-off events. [2024-12-02 12:01:47,230 INFO L125 PetriNetUnfolderBase]: For 276350/276688 co-relation queries the response was YES. [2024-12-02 12:01:47,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40260 conditions, 10679 events. 4119/10679 cut-off events. For 276350/276688 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 66813 event pairs, 57 based on Foata normal form. 376/11018 useless extension candidates. Maximal degree in co-relation 40205. Up to 2433 conditions per place. [2024-12-02 12:01:47,299 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 316 selfloop transitions, 500 changer transitions 0/826 dead transitions. [2024-12-02 12:01:47,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 826 transitions, 9742 flow [2024-12-02 12:01:47,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-12-02 12:01:47,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2024-12-02 12:01:47,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 822 transitions. [2024-12-02 12:01:47,302 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5784658691062632 [2024-12-02 12:01:47,302 INFO L175 Difference]: Start difference. First operand has 119 places, 180 transitions, 2232 flow. Second operand 49 states and 822 transitions. [2024-12-02 12:01:47,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 826 transitions, 9742 flow [2024-12-02 12:01:47,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 826 transitions, 7991 flow, removed 852 selfloop flow, removed 5 redundant places. [2024-12-02 12:01:47,457 INFO L231 Difference]: Finished difference. Result has 208 places, 538 transitions, 7092 flow [2024-12-02 12:01:47,457 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1923, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=7092, PETRI_PLACES=208, PETRI_TRANSITIONS=538} [2024-12-02 12:01:47,457 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 178 predicate places. [2024-12-02 12:01:47,457 INFO L471 AbstractCegarLoop]: Abstraction has has 208 places, 538 transitions, 7092 flow [2024-12-02 12:01:47,458 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 10.040816326530612) internal successors, (492), 49 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:01:47,458 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:01:47,458 INFO L206 CegarLoopForPetriNet]: trace histogram [47, 46, 46, 46, 46, 1, 1, 1, 1] [2024-12-02 12:01:47,464 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f0cbba-56f0-433d-96c4-e5c38fb52084/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-12-02 12:01:47,658 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f0cbba-56f0-433d-96c4-e5c38fb52084/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:01:47,658 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2024-12-02 12:01:47,659 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:01:47,659 INFO L85 PathProgramCache]: Analyzing trace with hash -80074973, now seen corresponding path program 5 times [2024-12-02 12:01:47,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:01:47,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994889637] [2024-12-02 12:01:47,660 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 12:01:47,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:01:47,749 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2024-12-02 12:01:47,749 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:01:49,905 INFO L134 CoverageAnalysis]: Checked inductivity of 5267 backedges. 0 proven. 5267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:01:49,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:01:49,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994889637] [2024-12-02 12:01:49,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994889637] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:01:49,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143255665] [2024-12-02 12:01:49,906 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 12:01:49,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:01:49,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f0cbba-56f0-433d-96c4-e5c38fb52084/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:01:49,908 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f0cbba-56f0-433d-96c4-e5c38fb52084/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:01:49,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f0cbba-56f0-433d-96c4-e5c38fb52084/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-12-02 12:01:50,095 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2024-12-02 12:01:50,095 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:01:50,099 INFO L256 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-12-02 12:01:50,105 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:01:50,411 INFO L134 CoverageAnalysis]: Checked inductivity of 5267 backedges. 0 proven. 5267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:01:50,411 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:01:52,820 INFO L134 CoverageAnalysis]: Checked inductivity of 5267 backedges. 0 proven. 5267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:01:52,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143255665] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:01:52,820 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:01:52,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 94 [2024-12-02 12:01:52,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804807521] [2024-12-02 12:01:52,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:01:52,821 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2024-12-02 12:01:52,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:01:52,823 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2024-12-02 12:01:52,824 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2024-12-02 12:01:52,824 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 29 [2024-12-02 12:01:52,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 538 transitions, 7092 flow. Second operand has 96 states, 96 states have (on average 10.0) internal successors, (960), 96 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:01:52,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:01:52,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 29 [2024-12-02 12:01:52,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:02:05,744 INFO L124 PetriNetUnfolderBase]: 12651/33265 cut-off events. [2024-12-02 12:02:05,744 INFO L125 PetriNetUnfolderBase]: For 2193584/2194294 co-relation queries the response was YES. [2024-12-02 12:02:06,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125449 conditions, 33265 events. 12651/33265 cut-off events. For 2193584/2194294 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 241089 event pairs, 177 based on Foata normal form. 760/34008 useless extension candidates. Maximal degree in co-relation 125351. Up to 8011 conditions per place. [2024-12-02 12:02:06,293 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 604 selfloop transitions, 1792 changer transitions 0/2406 dead transitions. [2024-12-02 12:02:06,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 2406 transitions, 31114 flow [2024-12-02 12:02:06,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2024-12-02 12:02:06,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2024-12-02 12:02:06,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 1626 transitions. [2024-12-02 12:02:06,299 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.584051724137931 [2024-12-02 12:02:06,299 INFO L175 Difference]: Start difference. First operand has 208 places, 538 transitions, 7092 flow. Second operand 96 states and 1626 transitions. [2024-12-02 12:02:06,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 2406 transitions, 31114 flow [2024-12-02 12:02:07,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 2406 transitions, 24595 flow, removed 3150 selfloop flow, removed 11 redundant places. [2024-12-02 12:02:07,240 INFO L231 Difference]: Finished difference. Result has 386 places, 1832 transitions, 24462 flow [2024-12-02 12:02:07,240 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=6335, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=505, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=96, PETRI_FLOW=24462, PETRI_PLACES=386, PETRI_TRANSITIONS=1832} [2024-12-02 12:02:07,241 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 356 predicate places. [2024-12-02 12:02:07,241 INFO L471 AbstractCegarLoop]: Abstraction has has 386 places, 1832 transitions, 24462 flow [2024-12-02 12:02:07,242 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 10.0) internal successors, (960), 96 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:02:07,242 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:02:07,242 INFO L206 CegarLoopForPetriNet]: trace histogram [95, 94, 94, 94, 94, 1, 1, 1, 1] [2024-12-02 12:02:07,252 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f0cbba-56f0-433d-96c4-e5c38fb52084/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-12-02 12:02:07,443 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f0cbba-56f0-433d-96c4-e5c38fb52084/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:02:07,443 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2024-12-02 12:02:07,445 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:02:07,446 INFO L85 PathProgramCache]: Analyzing trace with hash -2005365981, now seen corresponding path program 6 times [2024-12-02 12:02:07,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:02:07,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895396890] [2024-12-02 12:02:07,446 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 12:02:07,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:02:07,954 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 95 check-sat command(s) [2024-12-02 12:02:07,954 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:02:14,096 INFO L134 CoverageAnalysis]: Checked inductivity of 22043 backedges. 0 proven. 22043 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:02:14,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:02:14,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895396890] [2024-12-02 12:02:14,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895396890] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:02:14,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147104616] [2024-12-02 12:02:14,096 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 12:02:14,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:02:14,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f0cbba-56f0-433d-96c4-e5c38fb52084/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:02:14,098 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f0cbba-56f0-433d-96c4-e5c38fb52084/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:02:14,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f0cbba-56f0-433d-96c4-e5c38fb52084/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-12-02 12:02:14,402 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 95 check-sat command(s) [2024-12-02 12:02:14,402 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:02:14,407 INFO L256 TraceCheckSpWp]: Trace formula consists of 1081 conjuncts, 97 conjuncts are in the unsatisfiable core [2024-12-02 12:02:14,412 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:02:14,866 INFO L134 CoverageAnalysis]: Checked inductivity of 22043 backedges. 0 proven. 22043 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:02:14,866 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:02:23,512 INFO L134 CoverageAnalysis]: Checked inductivity of 22043 backedges. 0 proven. 22043 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:02:23,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147104616] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:02:23,512 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:02:23,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95, 95] total 191 [2024-12-02 12:02:23,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108078400] [2024-12-02 12:02:23,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:02:23,513 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2024-12-02 12:02:23,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:02:23,518 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2024-12-02 12:02:23,523 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2024-12-02 12:02:23,524 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 29 [2024-12-02 12:02:23,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 1832 transitions, 24462 flow. Second operand has 193 states, 193 states have (on average 10.010362694300518) internal successors, (1932), 193 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:02:23,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:02:23,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 29 [2024-12-02 12:02:23,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:03:50,177 INFO L124 PetriNetUnfolderBase]: 43551/115179 cut-off events. [2024-12-02 12:03:50,177 INFO L125 PetriNetUnfolderBase]: For 17709398/17710868 co-relation queries the response was YES. [2024-12-02 12:03:52,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 434042 conditions, 115179 events. 43551/115179 cut-off events. For 17709398/17710868 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 972748 event pairs, 301 based on Foata normal form. 1528/116662 useless extension candidates. Maximal degree in co-relation 433859. Up to 28349 conditions per place. [2024-12-02 12:03:52,789 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 1184 selfloop transitions, 6684 changer transitions 0/7878 dead transitions. [2024-12-02 12:03:52,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 578 places, 7878 transitions, 108608 flow [2024-12-02 12:03:52,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2024-12-02 12:03:52,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2024-12-02 12:03:52,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 3270 transitions. [2024-12-02 12:03:52,797 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5842415579774879 [2024-12-02 12:03:52,797 INFO L175 Difference]: Start difference. First operand has 386 places, 1832 transitions, 24462 flow. Second operand 193 states and 3270 transitions. [2024-12-02 12:03:52,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 578 places, 7878 transitions, 108608 flow [2024-12-02 12:04:00,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 556 places, 7878 transitions, 83625 flow, removed 12063 selfloop flow, removed 22 redundant places. [2024-12-02 12:04:00,531 INFO L231 Difference]: Finished difference. Result has 746 places, 6726 transitions, 89614 flow [2024-12-02 12:04:00,532 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=22521, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1832, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1797, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=193, PETRI_FLOW=89614, PETRI_PLACES=746, PETRI_TRANSITIONS=6726} [2024-12-02 12:04:00,533 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 716 predicate places. [2024-12-02 12:04:00,533 INFO L471 AbstractCegarLoop]: Abstraction has has 746 places, 6726 transitions, 89614 flow [2024-12-02 12:04:00,534 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 10.010362694300518) internal successors, (1932), 193 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:04:00,534 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:04:00,534 INFO L206 CegarLoopForPetriNet]: trace histogram [191, 190, 190, 190, 190, 1, 1, 1, 1] [2024-12-02 12:04:00,545 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f0cbba-56f0-433d-96c4-e5c38fb52084/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-12-02 12:04:00,735 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f0cbba-56f0-433d-96c4-e5c38fb52084/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-12-02 12:04:00,735 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2024-12-02 12:04:00,746 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:04:00,746 INFO L85 PathProgramCache]: Analyzing trace with hash -917679325, now seen corresponding path program 7 times [2024-12-02 12:04:00,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:04:00,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595128382] [2024-12-02 12:04:00,746 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 12:04:00,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:04:01,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:04:25,656 INFO L134 CoverageAnalysis]: Checked inductivity of 90155 backedges. 0 proven. 90155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:04:25,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:04:25,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595128382] [2024-12-02 12:04:25,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595128382] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:04:25,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066620334] [2024-12-02 12:04:25,656 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 12:04:25,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:04:25,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f0cbba-56f0-433d-96c4-e5c38fb52084/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:04:25,658 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f0cbba-56f0-433d-96c4-e5c38fb52084/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:04:25,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95f0cbba-56f0-433d-96c4-e5c38fb52084/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-12-02 12:04:25,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:04:25,996 INFO L256 TraceCheckSpWp]: Trace formula consists of 2137 conjuncts, 193 conjuncts are in the unsatisfiable core [2024-12-02 12:04:26,006 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:04:26,781 INFO L134 CoverageAnalysis]: Checked inductivity of 90155 backedges. 0 proven. 90155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:04:26,781 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:05:01,292 INFO L134 CoverageAnalysis]: Checked inductivity of 90155 backedges. 0 proven. 90155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:05:01,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066620334] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:05:01,292 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:05:01,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [191, 191, 191] total 383 [2024-12-02 12:05:01,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546338004] [2024-12-02 12:05:01,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:05:01,295 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 385 states [2024-12-02 12:05:01,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:05:01,311 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 385 interpolants. [2024-12-02 12:05:01,327 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73920, Invalid=73920, Unknown=0, NotChecked=0, Total=147840 [2024-12-02 12:05:01,329 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 29 [2024-12-02 12:05:01,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 746 places, 6726 transitions, 89614 flow. Second operand has 385 states, 385 states have (on average 10.005194805194805) internal successors, (3852), 385 states have internal predecessors, (3852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:05:01,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:05:01,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 29 [2024-12-02 12:05:01,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand