./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28085dbd-050e-4320-8740-6a7f66c9e72e/bin/uautomizer-verify-84ZbGMXZE1/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28085dbd-050e-4320-8740-6a7f66c9e72e/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_28085dbd-050e-4320-8740-6a7f66c9e72e/bin/uautomizer-verify-84ZbGMXZE1/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28085dbd-050e-4320-8740-6a7f66c9e72e/bin/uautomizer-verify-84ZbGMXZE1/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28085dbd-050e-4320-8740-6a7f66c9e72e/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28085dbd-050e-4320-8740-6a7f66c9e72e/bin/uautomizer-verify-84ZbGMXZE1 --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a79fe9fcfc95192d454ac05616e4d9a71dbf2bcc8b4fd9d21dcef47910a50542 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-12-02 08:46:05,347 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-12-02 08:46:05,411 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28085dbd-050e-4320-8740-6a7f66c9e72e/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-12-02 08:46:05,417 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-12-02 08:46:05,417 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-12-02 08:46:05,442 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-12-02 08:46:05,442 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-12-02 08:46:05,442 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-12-02 08:46:05,443 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-12-02 08:46:05,443 INFO L153 SettingsManager]: * Use memory slicer=true [2024-12-02 08:46:05,443 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-12-02 08:46:05,443 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-12-02 08:46:05,443 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-12-02 08:46:05,444 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-12-02 08:46:05,444 INFO L153 SettingsManager]: * Use SBE=true [2024-12-02 08:46:05,444 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-12-02 08:46:05,444 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-12-02 08:46:05,444 INFO L153 SettingsManager]: * sizeof long=4 [2024-12-02 08:46:05,444 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-12-02 08:46:05,444 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-12-02 08:46:05,444 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-12-02 08:46:05,444 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-12-02 08:46:05,445 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-12-02 08:46:05,445 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-12-02 08:46:05,445 INFO L153 SettingsManager]: * sizeof long double=12 [2024-12-02 08:46:05,445 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-12-02 08:46:05,445 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-12-02 08:46:05,445 INFO L153 SettingsManager]: * Use constant arrays=true [2024-12-02 08:46:05,445 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-12-02 08:46:05,445 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 08:46:05,445 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 08:46:05,445 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 08:46:05,446 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 08:46:05,446 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-12-02 08:46:05,446 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 08:46:05,446 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 08:46:05,446 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 08:46:05,446 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 08:46:05,446 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-12-02 08:46:05,446 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-12-02 08:46:05,446 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-12-02 08:46:05,446 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-12-02 08:46:05,447 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-12-02 08:46:05,447 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-12-02 08:46:05,447 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-12-02 08:46:05,447 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-12-02 08:46:05,447 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-12-02 08:46:05,447 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-12-02 08:46:05,447 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_28085dbd-050e-4320-8740-6a7f66c9e72e/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 ! call(reach_error())) ) 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 -> a79fe9fcfc95192d454ac05616e4d9a71dbf2bcc8b4fd9d21dcef47910a50542 [2024-12-02 08:46:05,696 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-12-02 08:46:05,704 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-12-02 08:46:05,706 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-12-02 08:46:05,707 INFO L270 PluginConnector]: Initializing CDTParser... [2024-12-02 08:46:05,707 INFO L274 PluginConnector]: CDTParser initialized [2024-12-02 08:46:05,708 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28085dbd-050e-4320-8740-6a7f66c9e72e/bin/uautomizer-verify-84ZbGMXZE1/../../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c [2024-12-02 08:46:08,452 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28085dbd-050e-4320-8740-6a7f66c9e72e/bin/uautomizer-verify-84ZbGMXZE1/data/4d8a63fdc/22fc6564100c45068d3c8744bd2091cf/FLAGd06b7dbaa [2024-12-02 08:46:08,659 INFO L384 CDTParser]: Found 1 translation units. [2024-12-02 08:46:08,660 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28085dbd-050e-4320-8740-6a7f66c9e72e/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c [2024-12-02 08:46:08,667 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28085dbd-050e-4320-8740-6a7f66c9e72e/bin/uautomizer-verify-84ZbGMXZE1/data/4d8a63fdc/22fc6564100c45068d3c8744bd2091cf/FLAGd06b7dbaa [2024-12-02 08:46:08,681 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28085dbd-050e-4320-8740-6a7f66c9e72e/bin/uautomizer-verify-84ZbGMXZE1/data/4d8a63fdc/22fc6564100c45068d3c8744bd2091cf [2024-12-02 08:46:08,684 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-12-02 08:46:08,685 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-12-02 08:46:08,686 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-12-02 08:46:08,686 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-12-02 08:46:08,690 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-12-02 08:46:08,691 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 08:46:08" (1/1) ... [2024-12-02 08:46:08,692 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f6e7b77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:46:08, skipping insertion in model container [2024-12-02 08:46:08,692 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 08:46:08" (1/1) ... [2024-12-02 08:46:08,708 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-12-02 08:46:08,880 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28085dbd-050e-4320-8740-6a7f66c9e72e/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c[4226,4239] [2024-12-02 08:46:08,889 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 08:46:08,897 INFO L200 MainTranslator]: Completed pre-run [2024-12-02 08:46:08,921 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28085dbd-050e-4320-8740-6a7f66c9e72e/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c[4226,4239] [2024-12-02 08:46:08,925 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 08:46:08,940 INFO L204 MainTranslator]: Completed translation [2024-12-02 08:46:08,941 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:46:08 WrapperNode [2024-12-02 08:46:08,941 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-12-02 08:46:08,942 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-12-02 08:46:08,942 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-12-02 08:46:08,942 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-12-02 08:46:08,948 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:46:08" (1/1) ... [2024-12-02 08:46:08,957 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:46:08" (1/1) ... [2024-12-02 08:46:08,982 INFO L138 Inliner]: procedures = 25, calls = 55, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 301 [2024-12-02 08:46:08,982 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-12-02 08:46:08,983 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-12-02 08:46:08,983 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-12-02 08:46:08,983 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-12-02 08:46:08,992 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:46:08" (1/1) ... [2024-12-02 08:46:08,992 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:46:08" (1/1) ... [2024-12-02 08:46:08,995 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:46:08" (1/1) ... [2024-12-02 08:46:09,011 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-12-02 08:46:09,011 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:46:08" (1/1) ... [2024-12-02 08:46:09,012 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:46:08" (1/1) ... [2024-12-02 08:46:09,019 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:46:08" (1/1) ... [2024-12-02 08:46:09,020 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:46:08" (1/1) ... [2024-12-02 08:46:09,024 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:46:08" (1/1) ... [2024-12-02 08:46:09,026 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:46:08" (1/1) ... [2024-12-02 08:46:09,027 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:46:08" (1/1) ... [2024-12-02 08:46:09,030 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-12-02 08:46:09,031 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-12-02 08:46:09,031 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-12-02 08:46:09,031 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-12-02 08:46:09,032 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:46:08" (1/1) ... [2024-12-02 08:46:09,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 08:46:09,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28085dbd-050e-4320-8740-6a7f66c9e72e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 08:46:09,060 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28085dbd-050e-4320-8740-6a7f66c9e72e/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-12-02 08:46:09,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28085dbd-050e-4320-8740-6a7f66c9e72e/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-12-02 08:46:09,087 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-12-02 08:46:09,087 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-12-02 08:46:09,087 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-12-02 08:46:09,087 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-12-02 08:46:09,087 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-12-02 08:46:09,087 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-12-02 08:46:09,088 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-12-02 08:46:09,088 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-12-02 08:46:09,088 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-12-02 08:46:09,088 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-12-02 08:46:09,088 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-12-02 08:46:09,088 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-12-02 08:46:09,088 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-12-02 08:46:09,088 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-12-02 08:46:09,088 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-12-02 08:46:09,088 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-12-02 08:46:09,088 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-12-02 08:46:09,089 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-12-02 08:46:09,089 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-12-02 08:46:09,089 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-12-02 08:46:09,090 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 08:46:09,186 INFO L234 CfgBuilder]: Building ICFG [2024-12-02 08:46:09,187 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-12-02 08:46:09,548 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-12-02 08:46:09,548 INFO L283 CfgBuilder]: Performing block encoding [2024-12-02 08:46:09,842 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-12-02 08:46:09,843 INFO L312 CfgBuilder]: Removed 6 assume(true) statements. [2024-12-02 08:46:09,843 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 08:46:09 BoogieIcfgContainer [2024-12-02 08:46:09,843 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-12-02 08:46:09,861 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-12-02 08:46:09,861 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-12-02 08:46:09,865 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-12-02 08:46:09,866 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 08:46:08" (1/3) ... [2024-12-02 08:46:09,866 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67fbfe0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 08:46:09, skipping insertion in model container [2024-12-02 08:46:09,866 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:46:08" (2/3) ... [2024-12-02 08:46:09,867 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67fbfe0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 08:46:09, skipping insertion in model container [2024-12-02 08:46:09,867 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 08:46:09" (3/3) ... [2024-12-02 08:46:09,868 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-bad-buffer-mult-alt2.wvr.c [2024-12-02 08:46:09,883 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-12-02 08:46:09,885 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-bad-buffer-mult-alt2.wvr.c that has 5 procedures, 43 locations, 1 initial locations, 6 loop locations, and 1 error locations. [2024-12-02 08:46:09,885 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-12-02 08:46:09,950 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-12-02 08:46:09,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 48 transitions, 124 flow [2024-12-02 08:46:10,016 INFO L124 PetriNetUnfolderBase]: 6/44 cut-off events. [2024-12-02 08:46:10,019 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-12-02 08:46:10,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 44 events. 6/44 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 66 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 37. Up to 2 conditions per place. [2024-12-02 08:46:10,022 INFO L82 GeneralOperation]: Start removeDead. Operand has 55 places, 48 transitions, 124 flow [2024-12-02 08:46:10,025 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 43 transitions, 110 flow [2024-12-02 08:46:10,032 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-12-02 08:46:10,042 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;@52557496, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-12-02 08:46:10,042 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-12-02 08:46:10,058 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-12-02 08:46:10,059 INFO L124 PetriNetUnfolderBase]: 6/42 cut-off events. [2024-12-02 08:46:10,059 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-12-02 08:46:10,059 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 08:46:10,059 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 08:46:10,060 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-12-02 08:46:10,064 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 08:46:10,065 INFO L85 PathProgramCache]: Analyzing trace with hash -354730807, now seen corresponding path program 1 times [2024-12-02 08:46:10,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 08:46:10,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136392733] [2024-12-02 08:46:10,072 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 08:46:10,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 08:46:10,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 08:46:10,670 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 08:46:10,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 08:46:10,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136392733] [2024-12-02 08:46:10,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136392733] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 08:46:10,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 08:46:10,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 08:46:10,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048536946] [2024-12-02 08:46:10,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 08:46:10,680 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 08:46:10,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 08:46:10,703 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 08:46:10,704 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-12-02 08:46:10,724 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 48 [2024-12-02 08:46:10,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 110 flow. Second operand has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 08:46:10,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 08:46:10,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 48 [2024-12-02 08:46:10,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 08:46:11,151 INFO L124 PetriNetUnfolderBase]: 1029/1674 cut-off events. [2024-12-02 08:46:11,151 INFO L125 PetriNetUnfolderBase]: For 92/92 co-relation queries the response was YES. [2024-12-02 08:46:11,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3312 conditions, 1674 events. 1029/1674 cut-off events. For 92/92 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 10228 event pairs, 110 based on Foata normal form. 80/1708 useless extension candidates. Maximal degree in co-relation 3168. Up to 997 conditions per place. [2024-12-02 08:46:11,170 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 51 selfloop transitions, 4 changer transitions 0/70 dead transitions. [2024-12-02 08:46:11,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 70 transitions, 292 flow [2024-12-02 08:46:11,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 08:46:11,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-02 08:46:11,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 151 transitions. [2024-12-02 08:46:11,183 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6291666666666667 [2024-12-02 08:46:11,184 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 110 flow. Second operand 5 states and 151 transitions. [2024-12-02 08:46:11,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 70 transitions, 292 flow [2024-12-02 08:46:11,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 70 transitions, 264 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-12-02 08:46:11,195 INFO L231 Difference]: Finished difference. Result has 47 places, 44 transitions, 110 flow [2024-12-02 08:46:11,197 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=110, PETRI_PLACES=47, PETRI_TRANSITIONS=44} [2024-12-02 08:46:11,200 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, -3 predicate places. [2024-12-02 08:46:11,201 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 44 transitions, 110 flow [2024-12-02 08:46:11,201 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 08:46:11,201 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 08:46:11,201 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 08:46:11,201 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-12-02 08:46:11,202 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-12-02 08:46:11,202 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 08:46:11,202 INFO L85 PathProgramCache]: Analyzing trace with hash 582379520, now seen corresponding path program 1 times [2024-12-02 08:46:11,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 08:46:11,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957541341] [2024-12-02 08:46:11,203 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 08:46:11,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 08:46:11,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 08:46:11,522 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 08:46:11,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 08:46:11,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957541341] [2024-12-02 08:46:11,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957541341] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 08:46:11,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 08:46:11,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 08:46:11,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752944303] [2024-12-02 08:46:11,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 08:46:11,524 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 08:46:11,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 08:46:11,525 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 08:46:11,525 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-12-02 08:46:11,545 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 48 [2024-12-02 08:46:11,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 44 transitions, 110 flow. Second operand has 5 states, 5 states have (on average 23.4) internal successors, (117), 5 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 08:46:11,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 08:46:11,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 48 [2024-12-02 08:46:11,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 08:46:12,029 INFO L124 PetriNetUnfolderBase]: 1531/2294 cut-off events. [2024-12-02 08:46:12,030 INFO L125 PetriNetUnfolderBase]: For 493/790 co-relation queries the response was YES. [2024-12-02 08:46:12,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5039 conditions, 2294 events. 1531/2294 cut-off events. For 493/790 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 12736 event pairs, 168 based on Foata normal form. 381/2659 useless extension candidates. Maximal degree in co-relation 1398. Up to 1353 conditions per place. [2024-12-02 08:46:12,049 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 58 selfloop transitions, 7 changer transitions 0/80 dead transitions. [2024-12-02 08:46:12,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 80 transitions, 332 flow [2024-12-02 08:46:12,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 08:46:12,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-12-02 08:46:12,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-12-02 08:46:12,052 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6215277777777778 [2024-12-02 08:46:12,052 INFO L175 Difference]: Start difference. First operand has 47 places, 44 transitions, 110 flow. Second operand 6 states and 179 transitions. [2024-12-02 08:46:12,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 80 transitions, 332 flow [2024-12-02 08:46:12,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 80 transitions, 323 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-12-02 08:46:12,054 INFO L231 Difference]: Finished difference. Result has 52 places, 49 transitions, 155 flow [2024-12-02 08:46:12,054 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=155, PETRI_PLACES=52, PETRI_TRANSITIONS=49} [2024-12-02 08:46:12,055 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 2 predicate places. [2024-12-02 08:46:12,055 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 49 transitions, 155 flow [2024-12-02 08:46:12,055 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.4) internal successors, (117), 5 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 08:46:12,055 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 08:46:12,055 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 08:46:12,056 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-12-02 08:46:12,056 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-12-02 08:46:12,056 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 08:46:12,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1801328640, now seen corresponding path program 2 times [2024-12-02 08:46:12,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 08:46:12,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108118724] [2024-12-02 08:46:12,057 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 08:46:12,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 08:46:12,090 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 08:46:12,090 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 08:46:12,273 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 08:46:12,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 08:46:12,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108118724] [2024-12-02 08:46:12,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108118724] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 08:46:12,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 08:46:12,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 08:46:12,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997779580] [2024-12-02 08:46:12,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 08:46:12,274 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 08:46:12,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 08:46:12,275 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 08:46:12,275 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 08:46:12,275 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 48 [2024-12-02 08:46:12,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 49 transitions, 155 flow. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states 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 08:46:12,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 08:46:12,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 48 [2024-12-02 08:46:12,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 08:46:12,635 INFO L124 PetriNetUnfolderBase]: 1181/1915 cut-off events. [2024-12-02 08:46:12,635 INFO L125 PetriNetUnfolderBase]: For 2068/2430 co-relation queries the response was YES. [2024-12-02 08:46:12,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4869 conditions, 1915 events. 1181/1915 cut-off events. For 2068/2430 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 11485 event pairs, 811 based on Foata normal form. 430/2170 useless extension candidates. Maximal degree in co-relation 1779. Up to 1526 conditions per place. [2024-12-02 08:46:12,652 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 29 selfloop transitions, 2 changer transitions 17/67 dead transitions. [2024-12-02 08:46:12,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 67 transitions, 297 flow [2024-12-02 08:46:12,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 08:46:12,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-02 08:46:12,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 151 transitions. [2024-12-02 08:46:12,654 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6291666666666667 [2024-12-02 08:46:12,654 INFO L175 Difference]: Start difference. First operand has 52 places, 49 transitions, 155 flow. Second operand 5 states and 151 transitions. [2024-12-02 08:46:12,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 67 transitions, 297 flow [2024-12-02 08:46:12,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 67 transitions, 290 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-12-02 08:46:12,658 INFO L231 Difference]: Finished difference. Result has 57 places, 50 transitions, 172 flow [2024-12-02 08:46:12,658 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=172, PETRI_PLACES=57, PETRI_TRANSITIONS=50} [2024-12-02 08:46:12,658 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 7 predicate places. [2024-12-02 08:46:12,659 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 50 transitions, 172 flow [2024-12-02 08:46:12,659 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states 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 08:46:12,659 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 08:46:12,659 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 08:46:12,659 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-12-02 08:46:12,659 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-12-02 08:46:12,660 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 08:46:12,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1130135220, now seen corresponding path program 1 times [2024-12-02 08:46:12,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 08:46:12,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474425212] [2024-12-02 08:46:12,660 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 08:46:12,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 08:46:12,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 08:46:12,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 08:46:12,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 08:46:12,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474425212] [2024-12-02 08:46:12,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474425212] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 08:46:12,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397934549] [2024-12-02 08:46:12,906 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 08:46:12,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 08:46:12,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28085dbd-050e-4320-8740-6a7f66c9e72e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 08:46:12,909 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28085dbd-050e-4320-8740-6a7f66c9e72e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 08:46:12,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28085dbd-050e-4320-8740-6a7f66c9e72e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-12-02 08:46:13,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 08:46:13,027 INFO L256 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-12-02 08:46:13,032 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 08:46:13,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 08:46:13,243 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 08:46:13,393 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 08:46:13,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397934549] provided 1 perfect and 1 imperfect interpolant sequences [2024-12-02 08:46:13,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-12-02 08:46:13,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5, 7] total 15 [2024-12-02 08:46:13,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094029870] [2024-12-02 08:46:13,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 08:46:13,394 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-12-02 08:46:13,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 08:46:13,395 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-12-02 08:46:13,395 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2024-12-02 08:46:13,423 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 48 [2024-12-02 08:46:13,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 50 transitions, 172 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states 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 08:46:13,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 08:46:13,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 48 [2024-12-02 08:46:13,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 08:46:14,492 INFO L124 PetriNetUnfolderBase]: 5847/8113 cut-off events. [2024-12-02 08:46:14,493 INFO L125 PetriNetUnfolderBase]: For 3273/3279 co-relation queries the response was YES. [2024-12-02 08:46:14,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19925 conditions, 8113 events. 5847/8113 cut-off events. For 3273/3279 co-relation queries the response was YES. Maximal size of possible extension queue 654. Compared 50065 event pairs, 1063 based on Foata normal form. 114/7991 useless extension candidates. Maximal degree in co-relation 19908. Up to 2286 conditions per place. [2024-12-02 08:46:14,554 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 80 selfloop transitions, 14 changer transitions 0/105 dead transitions. [2024-12-02 08:46:14,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 105 transitions, 521 flow [2024-12-02 08:46:14,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 08:46:14,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-12-02 08:46:14,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-12-02 08:46:14,555 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-12-02 08:46:14,555 INFO L175 Difference]: Start difference. First operand has 57 places, 50 transitions, 172 flow. Second operand 6 states and 176 transitions. [2024-12-02 08:46:14,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 105 transitions, 521 flow [2024-12-02 08:46:14,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 105 transitions, 505 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-12-02 08:46:14,565 INFO L231 Difference]: Finished difference. Result has 60 places, 59 transitions, 261 flow [2024-12-02 08:46:14,565 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=261, PETRI_PLACES=60, PETRI_TRANSITIONS=59} [2024-12-02 08:46:14,565 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 10 predicate places. [2024-12-02 08:46:14,566 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 59 transitions, 261 flow [2024-12-02 08:46:14,566 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states 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 08:46:14,566 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 08:46:14,566 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 08:46:14,575 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28085dbd-050e-4320-8740-6a7f66c9e72e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-12-02 08:46:14,766 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28085dbd-050e-4320-8740-6a7f66c9e72e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 08:46:14,767 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-12-02 08:46:14,767 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 08:46:14,767 INFO L85 PathProgramCache]: Analyzing trace with hash 822918339, now seen corresponding path program 1 times [2024-12-02 08:46:14,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 08:46:14,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584846691] [2024-12-02 08:46:14,767 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 08:46:14,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 08:46:14,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 08:46:15,821 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 08:46:15,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 08:46:15,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584846691] [2024-12-02 08:46:15,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584846691] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 08:46:15,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575560489] [2024-12-02 08:46:15,821 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 08:46:15,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 08:46:15,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28085dbd-050e-4320-8740-6a7f66c9e72e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 08:46:15,823 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28085dbd-050e-4320-8740-6a7f66c9e72e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 08:46:15,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28085dbd-050e-4320-8740-6a7f66c9e72e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-12-02 08:46:15,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 08:46:15,952 INFO L256 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-12-02 08:46:15,957 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 08:46:16,007 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-12-02 08:46:16,378 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-12-02 08:46:16,386 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 08:46:16,386 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 08:46:16,998 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 35 [2024-12-02 08:46:17,004 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 35 [2024-12-02 08:46:17,048 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 08:46:17,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575560489] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 08:46:17,048 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 08:46:17,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-12-02 08:46:17,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346574992] [2024-12-02 08:46:17,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 08:46:17,049 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-12-02 08:46:17,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 08:46:17,050 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-12-02 08:46:17,050 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2024-12-02 08:46:17,147 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 48 [2024-12-02 08:46:17,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 59 transitions, 261 flow. Second operand has 18 states, 18 states have (on average 24.38888888888889) internal successors, (439), 18 states have internal predecessors, (439), 0 states have call successors, (0), 0 states 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 08:46:17,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 08:46:17,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 48 [2024-12-02 08:46:17,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 08:46:19,822 INFO L124 PetriNetUnfolderBase]: 10325/16967 cut-off events. [2024-12-02 08:46:19,822 INFO L125 PetriNetUnfolderBase]: For 28726/30690 co-relation queries the response was YES. [2024-12-02 08:46:19,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48135 conditions, 16967 events. 10325/16967 cut-off events. For 28726/30690 co-relation queries the response was YES. Maximal size of possible extension queue 1067. Compared 135049 event pairs, 345 based on Foata normal form. 1592/18078 useless extension candidates. Maximal degree in co-relation 25135. Up to 4235 conditions per place. [2024-12-02 08:46:19,923 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 272 selfloop transitions, 75 changer transitions 4/374 dead transitions. [2024-12-02 08:46:19,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 374 transitions, 2153 flow [2024-12-02 08:46:19,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-12-02 08:46:19,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-12-02 08:46:19,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 874 transitions. [2024-12-02 08:46:19,926 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7003205128205128 [2024-12-02 08:46:19,926 INFO L175 Difference]: Start difference. First operand has 60 places, 59 transitions, 261 flow. Second operand 26 states and 874 transitions. [2024-12-02 08:46:19,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 374 transitions, 2153 flow [2024-12-02 08:46:19,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 374 transitions, 2119 flow, removed 14 selfloop flow, removed 1 redundant places. [2024-12-02 08:46:19,962 INFO L231 Difference]: Finished difference. Result has 95 places, 133 transitions, 938 flow [2024-12-02 08:46:19,962 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=938, PETRI_PLACES=95, PETRI_TRANSITIONS=133} [2024-12-02 08:46:19,963 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 45 predicate places. [2024-12-02 08:46:19,963 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 133 transitions, 938 flow [2024-12-02 08:46:19,963 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 24.38888888888889) internal successors, (439), 18 states have internal predecessors, (439), 0 states have call successors, (0), 0 states 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 08:46:19,963 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 08:46:19,964 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 08:46:19,972 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28085dbd-050e-4320-8740-6a7f66c9e72e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-12-02 08:46:20,164 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28085dbd-050e-4320-8740-6a7f66c9e72e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 08:46:20,164 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-12-02 08:46:20,165 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 08:46:20,165 INFO L85 PathProgramCache]: Analyzing trace with hash 948057717, now seen corresponding path program 1 times [2024-12-02 08:46:20,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 08:46:20,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582344741] [2024-12-02 08:46:20,165 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 08:46:20,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 08:46:20,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 08:46:21,110 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 08:46:21,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 08:46:21,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582344741] [2024-12-02 08:46:21,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582344741] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 08:46:21,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167817538] [2024-12-02 08:46:21,111 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 08:46:21,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 08:46:21,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28085dbd-050e-4320-8740-6a7f66c9e72e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 08:46:21,113 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28085dbd-050e-4320-8740-6a7f66c9e72e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 08:46:21,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28085dbd-050e-4320-8740-6a7f66c9e72e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-12-02 08:46:21,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 08:46:21,227 INFO L256 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-12-02 08:46:21,230 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 08:46:21,407 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2024-12-02 08:46:21,423 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-12-02 08:46:21,423 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 08:46:21,503 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 08:46:21,503 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2024-12-02 08:46:21,694 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-12-02 08:46:21,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167817538] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 08:46:21,695 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 08:46:21,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 14 [2024-12-02 08:46:21,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226694562] [2024-12-02 08:46:21,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 08:46:21,695 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-12-02 08:46:21,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 08:46:21,696 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-12-02 08:46:21,696 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2024-12-02 08:46:21,752 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 48 [2024-12-02 08:46:21,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 133 transitions, 938 flow. Second operand has 15 states, 15 states have (on average 24.666666666666668) internal successors, (370), 15 states have internal predecessors, (370), 0 states have call successors, (0), 0 states 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 08:46:21,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 08:46:21,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 48 [2024-12-02 08:46:21,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 08:46:25,158 INFO L124 PetriNetUnfolderBase]: 17554/29087 cut-off events. [2024-12-02 08:46:25,158 INFO L125 PetriNetUnfolderBase]: For 108107/111535 co-relation queries the response was YES. [2024-12-02 08:46:25,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96862 conditions, 29087 events. 17554/29087 cut-off events. For 108107/111535 co-relation queries the response was YES. Maximal size of possible extension queue 1767. Compared 252303 event pairs, 815 based on Foata normal form. 2587/31160 useless extension candidates. Maximal degree in co-relation 86062. Up to 9546 conditions per place. [2024-12-02 08:46:25,344 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 178 selfloop transitions, 102 changer transitions 2/305 dead transitions. [2024-12-02 08:46:25,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 305 transitions, 2340 flow [2024-12-02 08:46:25,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-12-02 08:46:25,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-12-02 08:46:25,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 534 transitions. [2024-12-02 08:46:25,346 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6544117647058824 [2024-12-02 08:46:25,346 INFO L175 Difference]: Start difference. First operand has 95 places, 133 transitions, 938 flow. Second operand 17 states and 534 transitions. [2024-12-02 08:46:25,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 305 transitions, 2340 flow [2024-12-02 08:46:25,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 305 transitions, 2314 flow, removed 12 selfloop flow, removed 1 redundant places. [2024-12-02 08:46:25,657 INFO L231 Difference]: Finished difference. Result has 117 places, 185 transitions, 1699 flow [2024-12-02 08:46:25,657 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=894, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1699, PETRI_PLACES=117, PETRI_TRANSITIONS=185} [2024-12-02 08:46:25,657 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 67 predicate places. [2024-12-02 08:46:25,657 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 185 transitions, 1699 flow [2024-12-02 08:46:25,658 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 24.666666666666668) internal successors, (370), 15 states have internal predecessors, (370), 0 states have call successors, (0), 0 states 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 08:46:25,658 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 08:46:25,658 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 08:46:25,664 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28085dbd-050e-4320-8740-6a7f66c9e72e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-12-02 08:46:25,858 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28085dbd-050e-4320-8740-6a7f66c9e72e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-12-02 08:46:25,859 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-12-02 08:46:25,859 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 08:46:25,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1938566766, now seen corresponding path program 1 times [2024-12-02 08:46:25,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 08:46:25,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765487767] [2024-12-02 08:46:25,859 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 08:46:25,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 08:46:25,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 08:46:25,942 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 08:46:25,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 08:46:25,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765487767] [2024-12-02 08:46:25,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765487767] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 08:46:25,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 08:46:25,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 08:46:25,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059079401] [2024-12-02 08:46:25,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 08:46:25,943 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 08:46:25,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 08:46:25,944 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 08:46:25,944 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 08:46:25,947 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 48 [2024-12-02 08:46:25,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 185 transitions, 1699 flow. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 08:46:25,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 08:46:25,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 48 [2024-12-02 08:46:25,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 08:46:30,264 INFO L124 PetriNetUnfolderBase]: 22951/37236 cut-off events. [2024-12-02 08:46:30,264 INFO L125 PetriNetUnfolderBase]: For 248247/252824 co-relation queries the response was YES. [2024-12-02 08:46:30,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138424 conditions, 37236 events. 22951/37236 cut-off events. For 248247/252824 co-relation queries the response was YES. Maximal size of possible extension queue 1974. Compared 318551 event pairs, 6353 based on Foata normal form. 3048/38722 useless extension candidates. Maximal degree in co-relation 132467. Up to 19623 conditions per place. [2024-12-02 08:46:30,619 INFO L140 encePairwiseOnDemand]: 45/48 looper letters, 224 selfloop transitions, 8 changer transitions 0/255 dead transitions. [2024-12-02 08:46:30,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 255 transitions, 3004 flow [2024-12-02 08:46:30,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 08:46:30,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 08:46:30,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 107 transitions. [2024-12-02 08:46:30,620 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7430555555555556 [2024-12-02 08:46:30,621 INFO L175 Difference]: Start difference. First operand has 117 places, 185 transitions, 1699 flow. Second operand 3 states and 107 transitions. [2024-12-02 08:46:30,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 255 transitions, 3004 flow [2024-12-02 08:46:31,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 255 transitions, 2911 flow, removed 44 selfloop flow, removed 2 redundant places. [2024-12-02 08:46:31,205 INFO L231 Difference]: Finished difference. Result has 118 places, 186 transitions, 1738 flow [2024-12-02 08:46:31,205 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1644, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1738, PETRI_PLACES=118, PETRI_TRANSITIONS=186} [2024-12-02 08:46:31,205 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 68 predicate places. [2024-12-02 08:46:31,205 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 186 transitions, 1738 flow [2024-12-02 08:46:31,205 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 08:46:31,205 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 08:46:31,206 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 08:46:31,206 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-12-02 08:46:31,206 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-12-02 08:46:31,206 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 08:46:31,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1233011039, now seen corresponding path program 1 times [2024-12-02 08:46:31,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 08:46:31,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272855054] [2024-12-02 08:46:31,207 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 08:46:31,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 08:46:31,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 08:46:31,367 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-12-02 08:46:31,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 08:46:31,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272855054] [2024-12-02 08:46:31,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272855054] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 08:46:31,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 08:46:31,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 08:46:31,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378982424] [2024-12-02 08:46:31,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 08:46:31,368 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 08:46:31,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 08:46:31,368 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 08:46:31,368 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 08:46:31,368 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 48 [2024-12-02 08:46:31,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 186 transitions, 1738 flow. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states 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 08:46:31,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 08:46:31,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 48 [2024-12-02 08:46:31,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 08:46:35,013 INFO L124 PetriNetUnfolderBase]: 17482/28734 cut-off events. [2024-12-02 08:46:35,013 INFO L125 PetriNetUnfolderBase]: For 181769/184883 co-relation queries the response was YES. [2024-12-02 08:46:35,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111321 conditions, 28734 events. 17482/28734 cut-off events. For 181769/184883 co-relation queries the response was YES. Maximal size of possible extension queue 1601. Compared 251026 event pairs, 10884 based on Foata normal form. 2797/29497 useless extension candidates. Maximal degree in co-relation 106193. Up to 15871 conditions per place. [2024-12-02 08:46:35,238 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 148 selfloop transitions, 11 changer transitions 11/193 dead transitions. [2024-12-02 08:46:35,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 193 transitions, 2126 flow [2024-12-02 08:46:35,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 08:46:35,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 08:46:35,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 132 transitions. [2024-12-02 08:46:35,239 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6875 [2024-12-02 08:46:35,239 INFO L175 Difference]: Start difference. First operand has 118 places, 186 transitions, 1738 flow. Second operand 4 states and 132 transitions. [2024-12-02 08:46:35,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 193 transitions, 2126 flow [2024-12-02 08:46:35,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 193 transitions, 2085 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-12-02 08:46:35,858 INFO L231 Difference]: Finished difference. Result has 116 places, 146 transitions, 1340 flow [2024-12-02 08:46:35,858 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1424, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1340, PETRI_PLACES=116, PETRI_TRANSITIONS=146} [2024-12-02 08:46:35,859 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 66 predicate places. [2024-12-02 08:46:35,859 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 146 transitions, 1340 flow [2024-12-02 08:46:35,859 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states 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 08:46:35,859 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 08:46:35,859 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 08:46:35,859 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-12-02 08:46:35,859 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-12-02 08:46:35,860 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 08:46:35,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1864355695, now seen corresponding path program 1 times [2024-12-02 08:46:35,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 08:46:35,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805321194] [2024-12-02 08:46:35,860 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 08:46:35,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 08:46:35,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 08:46:36,355 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-12-02 08:46:36,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 08:46:36,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805321194] [2024-12-02 08:46:36,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805321194] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 08:46:36,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735555795] [2024-12-02 08:46:36,356 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 08:46:36,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 08:46:36,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28085dbd-050e-4320-8740-6a7f66c9e72e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 08:46:36,358 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28085dbd-050e-4320-8740-6a7f66c9e72e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 08:46:36,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28085dbd-050e-4320-8740-6a7f66c9e72e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-12-02 08:46:36,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 08:46:36,476 INFO L256 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-12-02 08:46:36,478 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 08:46:36,771 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 08:46:36,771 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 08:46:37,119 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 08:46:37,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735555795] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 08:46:37,119 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 08:46:37,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 11] total 25 [2024-12-02 08:46:37,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801301326] [2024-12-02 08:46:37,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 08:46:37,120 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-12-02 08:46:37,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 08:46:37,121 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-12-02 08:46:37,121 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2024-12-02 08:46:37,240 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 48 [2024-12-02 08:46:37,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 146 transitions, 1340 flow. Second operand has 26 states, 26 states have (on average 12.461538461538462) internal successors, (324), 26 states have internal predecessors, (324), 0 states have call successors, (0), 0 states 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 08:46:37,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 08:46:37,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 48 [2024-12-02 08:46:37,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand