./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/parallel-misc-4.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ca6e31-91c7-49c1-bca2-c0d57d4be92b/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ca6e31-91c7-49c1-bca2-c0d57d4be92b/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ca6e31-91c7-49c1-bca2-c0d57d4be92b/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ca6e31-91c7-49c1-bca2-c0d57d4be92b/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/parallel-misc-4.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ca6e31-91c7-49c1-bca2-c0d57d4be92b/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ca6e31-91c7-49c1-bca2-c0d57d4be92b/bin/uautomizer-verify-BQ2R08f2Ya --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1b3f2e76aa91b47c1b0ab3ebb03a5219efabc6e79eff8c780f49eaa0a2d155ad --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-28 20:44:10,432 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-28 20:44:10,516 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ca6e31-91c7-49c1-bca2-c0d57d4be92b/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-11-28 20:44:10,520 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-28 20:44:10,521 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-28 20:44:10,545 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-28 20:44:10,546 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-28 20:44:10,547 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-28 20:44:10,547 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-28 20:44:10,548 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-28 20:44:10,548 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-28 20:44:10,549 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-28 20:44:10,550 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-28 20:44:10,550 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-28 20:44:10,551 INFO L153 SettingsManager]: * Use SBE=true [2023-11-28 20:44:10,551 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-28 20:44:10,552 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-28 20:44:10,552 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-28 20:44:10,553 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-28 20:44:10,553 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-28 20:44:10,553 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-28 20:44:10,554 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-28 20:44:10,554 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-28 20:44:10,555 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-28 20:44:10,555 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-28 20:44:10,556 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-28 20:44:10,556 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-28 20:44:10,556 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-28 20:44:10,557 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-28 20:44:10,557 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-28 20:44:10,557 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-28 20:44:10,558 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-28 20:44:10,558 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-28 20:44:10,558 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 20:44:10,559 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-28 20:44:10,559 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-28 20:44:10,559 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-28 20:44:10,559 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-28 20:44:10,559 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-28 20:44:10,560 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-28 20:44:10,560 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-28 20:44:10,560 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-28 20:44:10,560 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-28 20:44:10,560 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-28 20:44:10,561 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ca6e31-91c7-49c1-bca2-c0d57d4be92b/bin/uautomizer-verify-BQ2R08f2Ya/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ca6e31-91c7-49c1-bca2-c0d57d4be92b/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1b3f2e76aa91b47c1b0ab3ebb03a5219efabc6e79eff8c780f49eaa0a2d155ad [2023-11-28 20:44:10,802 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-28 20:44:10,822 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-28 20:44:10,825 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-28 20:44:10,826 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-28 20:44:10,827 INFO L274 PluginConnector]: CDTParser initialized [2023-11-28 20:44:10,828 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ca6e31-91c7-49c1-bca2-c0d57d4be92b/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/parallel-misc-4.wvr.c [2023-11-28 20:44:13,552 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-28 20:44:13,739 INFO L384 CDTParser]: Found 1 translation units. [2023-11-28 20:44:13,740 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ca6e31-91c7-49c1-bca2-c0d57d4be92b/sv-benchmarks/c/weaver/parallel-misc-4.wvr.c [2023-11-28 20:44:13,749 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ca6e31-91c7-49c1-bca2-c0d57d4be92b/bin/uautomizer-verify-BQ2R08f2Ya/data/0e8e1ab1f/a87a0e2c528b46dea5b0b0983480db0f/FLAG998d7648e [2023-11-28 20:44:13,764 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ca6e31-91c7-49c1-bca2-c0d57d4be92b/bin/uautomizer-verify-BQ2R08f2Ya/data/0e8e1ab1f/a87a0e2c528b46dea5b0b0983480db0f [2023-11-28 20:44:13,767 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-28 20:44:13,768 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-28 20:44:13,770 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-28 20:44:13,770 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-28 20:44:13,775 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-28 20:44:13,776 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:44:13" (1/1) ... [2023-11-28 20:44:13,777 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37a99614 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:44:13, skipping insertion in model container [2023-11-28 20:44:13,777 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:44:13" (1/1) ... [2023-11-28 20:44:13,803 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-28 20:44:13,970 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 20:44:13,994 INFO L202 MainTranslator]: Completed pre-run [2023-11-28 20:44:14,021 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 20:44:14,029 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-28 20:44:14,029 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-28 20:44:14,038 INFO L206 MainTranslator]: Completed translation [2023-11-28 20:44:14,038 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:44:14 WrapperNode [2023-11-28 20:44:14,038 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-28 20:44:14,039 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-28 20:44:14,039 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-28 20:44:14,040 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-28 20:44:14,045 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:44:14" (1/1) ... [2023-11-28 20:44:14,053 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:44:14" (1/1) ... [2023-11-28 20:44:14,071 INFO L138 Inliner]: procedures = 22, calls = 44, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 76 [2023-11-28 20:44:14,071 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-28 20:44:14,072 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-28 20:44:14,072 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-28 20:44:14,072 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-28 20:44:14,081 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:44:14" (1/1) ... [2023-11-28 20:44:14,081 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:44:14" (1/1) ... [2023-11-28 20:44:14,084 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:44:14" (1/1) ... [2023-11-28 20:44:14,096 INFO L175 MemorySlicer]: Split 8 memory accesses to 4 slices as follows [2, 2, 2, 2]. 25 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2023-11-28 20:44:14,097 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:44:14" (1/1) ... [2023-11-28 20:44:14,097 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:44:14" (1/1) ... [2023-11-28 20:44:14,102 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:44:14" (1/1) ... [2023-11-28 20:44:14,105 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:44:14" (1/1) ... [2023-11-28 20:44:14,107 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:44:14" (1/1) ... [2023-11-28 20:44:14,109 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:44:14" (1/1) ... [2023-11-28 20:44:14,112 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-28 20:44:14,113 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-28 20:44:14,113 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-28 20:44:14,113 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-28 20:44:14,114 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:44:14" (1/1) ... [2023-11-28 20:44:14,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 20:44:14,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ca6e31-91c7-49c1-bca2-c0d57d4be92b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:44:14,145 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ca6e31-91c7-49c1-bca2-c0d57d4be92b/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-28 20:44:14,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ca6e31-91c7-49c1-bca2-c0d57d4be92b/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-28 20:44:14,174 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-28 20:44:14,174 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-28 20:44:14,174 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-28 20:44:14,174 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-28 20:44:14,174 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-28 20:44:14,174 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-28 20:44:14,174 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-28 20:44:14,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-28 20:44:14,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-28 20:44:14,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-28 20:44:14,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-28 20:44:14,175 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-28 20:44:14,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-28 20:44:14,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-28 20:44:14,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-28 20:44:14,176 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-28 20:44:14,176 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-28 20:44:14,176 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-28 20:44:14,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-28 20:44:14,176 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-28 20:44:14,176 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-28 20:44:14,176 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-28 20:44:14,177 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-28 20:44:14,177 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-28 20:44:14,177 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-28 20:44:14,178 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-28 20:44:14,286 INFO L241 CfgBuilder]: Building ICFG [2023-11-28 20:44:14,288 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-28 20:44:14,496 INFO L282 CfgBuilder]: Performing block encoding [2023-11-28 20:44:14,659 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-28 20:44:14,660 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-28 20:44:14,660 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:44:14 BoogieIcfgContainer [2023-11-28 20:44:14,660 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-28 20:44:14,663 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-28 20:44:14,663 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-28 20:44:14,666 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-28 20:44:14,666 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 08:44:13" (1/3) ... [2023-11-28 20:44:14,667 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e881ab8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:44:14, skipping insertion in model container [2023-11-28 20:44:14,667 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:44:14" (2/3) ... [2023-11-28 20:44:14,667 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e881ab8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:44:14, skipping insertion in model container [2023-11-28 20:44:14,667 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:44:14" (3/3) ... [2023-11-28 20:44:14,668 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-4.wvr.c [2023-11-28 20:44:14,675 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-28 20:44:14,683 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-28 20:44:14,684 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2023-11-28 20:44:14,684 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-28 20:44:14,736 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-28 20:44:14,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 47 transitions, 115 flow [2023-11-28 20:44:14,795 INFO L124 PetriNetUnfolderBase]: 4/44 cut-off events. [2023-11-28 20:44:14,796 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-28 20:44:14,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57 conditions, 44 events. 4/44 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 124 event pairs, 0 based on Foata normal form. 0/32 useless extension candidates. Maximal degree in co-relation 40. Up to 2 conditions per place. [2023-11-28 20:44:14,799 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 47 transitions, 115 flow [2023-11-28 20:44:14,803 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 46 places, 40 transitions, 92 flow [2023-11-28 20:44:14,815 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-28 20:44:14,822 INFO L357 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, mHoare=true, 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;@ea4ef59, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-28 20:44:14,823 INFO L358 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2023-11-28 20:44:14,832 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-28 20:44:14,832 INFO L124 PetriNetUnfolderBase]: 1/19 cut-off events. [2023-11-28 20:44:14,832 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-28 20:44:14,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:44:14,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:44:14,834 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-11-28 20:44:14,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:44:14,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1184491158, now seen corresponding path program 1 times [2023-11-28 20:44:14,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:44:14,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569634025] [2023-11-28 20:44:14,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:44:14,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:44:14,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:44:15,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:44:15,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:44:15,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569634025] [2023-11-28 20:44:15,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569634025] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:44:15,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:44:15,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-28 20:44:15,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744215791] [2023-11-28 20:44:15,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:44:15,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:44:15,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:44:15,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:44:15,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:44:15,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2023-11-28 20:44:15,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 40 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:44:15,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:44:15,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2023-11-28 20:44:15,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:44:15,486 INFO L124 PetriNetUnfolderBase]: 1271/1839 cut-off events. [2023-11-28 20:44:15,486 INFO L125 PetriNetUnfolderBase]: For 92/92 co-relation queries the response was YES. [2023-11-28 20:44:15,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3620 conditions, 1839 events. 1271/1839 cut-off events. For 92/92 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 8715 event pairs, 187 based on Foata normal form. 0/1102 useless extension candidates. Maximal degree in co-relation 3327. Up to 1565 conditions per place. [2023-11-28 20:44:15,531 INFO L140 encePairwiseOnDemand]: 34/47 looper letters, 33 selfloop transitions, 5 changer transitions 0/54 dead transitions. [2023-11-28 20:44:15,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 54 transitions, 205 flow [2023-11-28 20:44:15,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:44:15,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-28 20:44:15,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 103 transitions. [2023-11-28 20:44:15,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7304964539007093 [2023-11-28 20:44:15,545 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 103 transitions. [2023-11-28 20:44:15,545 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 103 transitions. [2023-11-28 20:44:15,546 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:44:15,549 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 103 transitions. [2023-11-28 20:44:15,551 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 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) [2023-11-28 20:44:15,555 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 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) [2023-11-28 20:44:15,556 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 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) [2023-11-28 20:44:15,558 INFO L175 Difference]: Start difference. First operand has 46 places, 40 transitions, 92 flow. Second operand 3 states and 103 transitions. [2023-11-28 20:44:15,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 54 transitions, 205 flow [2023-11-28 20:44:15,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 54 transitions, 195 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-28 20:44:15,566 INFO L231 Difference]: Finished difference. Result has 45 places, 44 transitions, 133 flow [2023-11-28 20:44:15,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=45, PETRI_TRANSITIONS=44} [2023-11-28 20:44:15,572 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -1 predicate places. [2023-11-28 20:44:15,572 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 44 transitions, 133 flow [2023-11-28 20:44:15,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:44:15,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:44:15,573 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:44:15,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-28 20:44:15,574 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-11-28 20:44:15,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:44:15,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1447552410, now seen corresponding path program 1 times [2023-11-28 20:44:15,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:44:15,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333479429] [2023-11-28 20:44:15,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:44:15,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:44:15,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:44:15,658 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:44:15,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:44:15,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333479429] [2023-11-28 20:44:15,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333479429] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:44:15,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:44:15,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-28 20:44:15,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754343368] [2023-11-28 20:44:15,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:44:15,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:44:15,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:44:15,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:44:15,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:44:15,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2023-11-28 20:44:15,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 44 transitions, 133 flow. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 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) [2023-11-28 20:44:15,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:44:15,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2023-11-28 20:44:15,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:44:15,839 INFO L124 PetriNetUnfolderBase]: 865/1270 cut-off events. [2023-11-28 20:44:15,840 INFO L125 PetriNetUnfolderBase]: For 260/260 co-relation queries the response was YES. [2023-11-28 20:44:15,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3262 conditions, 1270 events. 865/1270 cut-off events. For 260/260 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 6738 event pairs, 395 based on Foata normal form. 0/750 useless extension candidates. Maximal degree in co-relation 1762. Up to 1144 conditions per place. [2023-11-28 20:44:15,853 INFO L140 encePairwiseOnDemand]: 44/47 looper letters, 25 selfloop transitions, 1 changer transitions 0/42 dead transitions. [2023-11-28 20:44:15,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 42 transitions, 177 flow [2023-11-28 20:44:15,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:44:15,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-28 20:44:15,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 81 transitions. [2023-11-28 20:44:15,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.574468085106383 [2023-11-28 20:44:15,856 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 81 transitions. [2023-11-28 20:44:15,856 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 81 transitions. [2023-11-28 20:44:15,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:44:15,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 81 transitions. [2023-11-28 20:44:15,857 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:44:15,858 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 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) [2023-11-28 20:44:15,858 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 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) [2023-11-28 20:44:15,859 INFO L175 Difference]: Start difference. First operand has 45 places, 44 transitions, 133 flow. Second operand 3 states and 81 transitions. [2023-11-28 20:44:15,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 42 transitions, 177 flow [2023-11-28 20:44:15,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 42 transitions, 172 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-28 20:44:15,861 INFO L231 Difference]: Finished difference. Result has 44 places, 42 transitions, 122 flow [2023-11-28 20:44:15,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=44, PETRI_TRANSITIONS=42} [2023-11-28 20:44:15,863 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -2 predicate places. [2023-11-28 20:44:15,863 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 42 transitions, 122 flow [2023-11-28 20:44:15,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 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) [2023-11-28 20:44:15,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:44:15,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:44:15,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-28 20:44:15,864 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-11-28 20:44:15,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:44:15,864 INFO L85 PathProgramCache]: Analyzing trace with hash 988250050, now seen corresponding path program 1 times [2023-11-28 20:44:15,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:44:15,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673055614] [2023-11-28 20:44:15,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:44:15,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:44:15,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:44:15,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 20:44:15,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:44:15,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673055614] [2023-11-28 20:44:15,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673055614] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:44:15,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:44:15,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-28 20:44:15,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122143665] [2023-11-28 20:44:15,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:44:15,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:44:15,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:44:15,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:44:15,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:44:15,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 47 [2023-11-28 20:44:15,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 42 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:44:15,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:44:15,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 47 [2023-11-28 20:44:15,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:44:16,269 INFO L124 PetriNetUnfolderBase]: 1367/2164 cut-off events. [2023-11-28 20:44:16,269 INFO L125 PetriNetUnfolderBase]: For 278/430 co-relation queries the response was YES. [2023-11-28 20:44:16,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5107 conditions, 2164 events. 1367/2164 cut-off events. For 278/430 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 12230 event pairs, 450 based on Foata normal form. 2/1449 useless extension candidates. Maximal degree in co-relation 5099. Up to 1011 conditions per place. [2023-11-28 20:44:16,289 INFO L140 encePairwiseOnDemand]: 43/47 looper letters, 42 selfloop transitions, 3 changer transitions 0/58 dead transitions. [2023-11-28 20:44:16,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 58 transitions, 257 flow [2023-11-28 20:44:16,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:44:16,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-28 20:44:16,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 91 transitions. [2023-11-28 20:44:16,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6453900709219859 [2023-11-28 20:44:16,291 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 91 transitions. [2023-11-28 20:44:16,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 91 transitions. [2023-11-28 20:44:16,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:44:16,292 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 91 transitions. [2023-11-28 20:44:16,292 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 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) [2023-11-28 20:44:16,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 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) [2023-11-28 20:44:16,294 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 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) [2023-11-28 20:44:16,294 INFO L175 Difference]: Start difference. First operand has 44 places, 42 transitions, 122 flow. Second operand 3 states and 91 transitions. [2023-11-28 20:44:16,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 58 transitions, 257 flow [2023-11-28 20:44:16,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 58 transitions, 256 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-28 20:44:16,297 INFO L231 Difference]: Finished difference. Result has 47 places, 43 transitions, 139 flow [2023-11-28 20:44:16,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=139, PETRI_PLACES=47, PETRI_TRANSITIONS=43} [2023-11-28 20:44:16,298 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 1 predicate places. [2023-11-28 20:44:16,298 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 43 transitions, 139 flow [2023-11-28 20:44:16,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:44:16,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:44:16,298 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:44:16,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-28 20:44:16,299 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-11-28 20:44:16,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:44:16,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1447552409, now seen corresponding path program 1 times [2023-11-28 20:44:16,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:44:16,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537278830] [2023-11-28 20:44:16,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:44:16,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:44:16,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:44:16,374 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:44:16,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:44:16,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537278830] [2023-11-28 20:44:16,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537278830] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:44:16,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461044093] [2023-11-28 20:44:16,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:44:16,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:44:16,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ca6e31-91c7-49c1-bca2-c0d57d4be92b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:44:16,380 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ca6e31-91c7-49c1-bca2-c0d57d4be92b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:44:16,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ca6e31-91c7-49c1-bca2-c0d57d4be92b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-28 20:44:16,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:44:16,468 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-28 20:44:16,471 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:44:16,524 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:44:16,525 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:44:16,559 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:44:16,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461044093] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:44:16,560 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:44:16,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2023-11-28 20:44:16,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954210132] [2023-11-28 20:44:16,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:44:16,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-28 20:44:16,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:44:16,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-28 20:44:16,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-28 20:44:16,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2023-11-28 20:44:16,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 43 transitions, 139 flow. Second operand has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 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) [2023-11-28 20:44:16,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:44:16,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2023-11-28 20:44:16,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:44:17,047 INFO L124 PetriNetUnfolderBase]: 2159/3910 cut-off events. [2023-11-28 20:44:17,048 INFO L125 PetriNetUnfolderBase]: For 772/772 co-relation queries the response was YES. [2023-11-28 20:44:17,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9055 conditions, 3910 events. 2159/3910 cut-off events. For 772/772 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 26226 event pairs, 119 based on Foata normal form. 0/3044 useless extension candidates. Maximal degree in co-relation 9044. Up to 1577 conditions per place. [2023-11-28 20:44:17,083 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 66 selfloop transitions, 18 changer transitions 0/102 dead transitions. [2023-11-28 20:44:17,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 102 transitions, 483 flow [2023-11-28 20:44:17,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-28 20:44:17,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-28 20:44:17,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 209 transitions. [2023-11-28 20:44:17,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7411347517730497 [2023-11-28 20:44:17,086 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 209 transitions. [2023-11-28 20:44:17,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 209 transitions. [2023-11-28 20:44:17,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:44:17,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 209 transitions. [2023-11-28 20:44:17,088 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 34.833333333333336) internal successors, (209), 6 states have internal predecessors, (209), 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) [2023-11-28 20:44:17,089 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 47.0) internal successors, (329), 7 states have internal predecessors, (329), 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) [2023-11-28 20:44:17,089 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 47.0) internal successors, (329), 7 states have internal predecessors, (329), 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) [2023-11-28 20:44:17,090 INFO L175 Difference]: Start difference. First operand has 47 places, 43 transitions, 139 flow. Second operand 6 states and 209 transitions. [2023-11-28 20:44:17,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 102 transitions, 483 flow [2023-11-28 20:44:17,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 102 transitions, 477 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-28 20:44:17,095 INFO L231 Difference]: Finished difference. Result has 53 places, 57 transitions, 285 flow [2023-11-28 20:44:17,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=285, PETRI_PLACES=53, PETRI_TRANSITIONS=57} [2023-11-28 20:44:17,097 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 7 predicate places. [2023-11-28 20:44:17,097 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 57 transitions, 285 flow [2023-11-28 20:44:17,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 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) [2023-11-28 20:44:17,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:44:17,097 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:44:17,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ca6e31-91c7-49c1-bca2-c0d57d4be92b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-28 20:44:17,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ca6e31-91c7-49c1-bca2-c0d57d4be92b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:44:17,298 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-11-28 20:44:17,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:44:17,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1447552376, now seen corresponding path program 1 times [2023-11-28 20:44:17,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:44:17,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753112603] [2023-11-28 20:44:17,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:44:17,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:44:17,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:44:17,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:44:17,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:44:17,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753112603] [2023-11-28 20:44:17,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753112603] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:44:17,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551941066] [2023-11-28 20:44:17,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:44:17,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:44:17,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ca6e31-91c7-49c1-bca2-c0d57d4be92b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:44:17,364 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ca6e31-91c7-49c1-bca2-c0d57d4be92b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:44:17,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ca6e31-91c7-49c1-bca2-c0d57d4be92b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-28 20:44:17,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:44:17,437 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-28 20:44:17,438 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:44:17,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:44:17,475 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:44:17,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551941066] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:44:17,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-28 20:44:17,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 4 [2023-11-28 20:44:17,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531744304] [2023-11-28 20:44:17,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:44:17,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 20:44:17,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:44:17,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 20:44:17,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-28 20:44:17,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2023-11-28 20:44:17,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 57 transitions, 285 flow. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:44:17,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:44:17,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2023-11-28 20:44:17,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:44:18,151 INFO L124 PetriNetUnfolderBase]: 3257/5806 cut-off events. [2023-11-28 20:44:18,151 INFO L125 PetriNetUnfolderBase]: For 11632/11632 co-relation queries the response was YES. [2023-11-28 20:44:18,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17332 conditions, 5806 events. 3257/5806 cut-off events. For 11632/11632 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 41511 event pairs, 807 based on Foata normal form. 142/5264 useless extension candidates. Maximal degree in co-relation 17318. Up to 2516 conditions per place. [2023-11-28 20:44:18,209 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 47 selfloop transitions, 16 changer transitions 0/81 dead transitions. [2023-11-28 20:44:18,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 81 transitions, 542 flow [2023-11-28 20:44:18,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 20:44:18,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-28 20:44:18,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 118 transitions. [2023-11-28 20:44:18,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6276595744680851 [2023-11-28 20:44:18,211 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 118 transitions. [2023-11-28 20:44:18,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 118 transitions. [2023-11-28 20:44:18,211 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:44:18,211 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 118 transitions. [2023-11-28 20:44:18,212 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 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) [2023-11-28 20:44:18,213 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 47.0) internal successors, (235), 5 states have internal predecessors, (235), 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) [2023-11-28 20:44:18,213 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 47.0) internal successors, (235), 5 states have internal predecessors, (235), 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) [2023-11-28 20:44:18,213 INFO L175 Difference]: Start difference. First operand has 53 places, 57 transitions, 285 flow. Second operand 4 states and 118 transitions. [2023-11-28 20:44:18,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 81 transitions, 542 flow [2023-11-28 20:44:18,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 81 transitions, 538 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-28 20:44:18,229 INFO L231 Difference]: Finished difference. Result has 57 places, 68 transitions, 459 flow [2023-11-28 20:44:18,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=459, PETRI_PLACES=57, PETRI_TRANSITIONS=68} [2023-11-28 20:44:18,230 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 11 predicate places. [2023-11-28 20:44:18,230 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 68 transitions, 459 flow [2023-11-28 20:44:18,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:44:18,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:44:18,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:44:18,235 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ca6e31-91c7-49c1-bca2-c0d57d4be92b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-28 20:44:18,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ca6e31-91c7-49c1-bca2-c0d57d4be92b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:44:18,432 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-11-28 20:44:18,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:44:18,432 INFO L85 PathProgramCache]: Analyzing trace with hash 314166089, now seen corresponding path program 1 times [2023-11-28 20:44:18,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:44:18,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498639591] [2023-11-28 20:44:18,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:44:18,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:44:18,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:44:18,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:44:18,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:44:18,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498639591] [2023-11-28 20:44:18,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498639591] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:44:18,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:44:18,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-28 20:44:18,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127138624] [2023-11-28 20:44:18,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:44:18,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 20:44:18,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:44:18,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 20:44:18,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-28 20:44:18,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2023-11-28 20:44:18,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 68 transitions, 459 flow. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:44:18,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:44:18,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2023-11-28 20:44:18,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:44:19,519 INFO L124 PetriNetUnfolderBase]: 4467/8210 cut-off events. [2023-11-28 20:44:19,520 INFO L125 PetriNetUnfolderBase]: For 26098/26098 co-relation queries the response was YES. [2023-11-28 20:44:19,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28117 conditions, 8210 events. 4467/8210 cut-off events. For 26098/26098 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 61177 event pairs, 229 based on Foata normal form. 160/7820 useless extension candidates. Maximal degree in co-relation 28100. Up to 3863 conditions per place. [2023-11-28 20:44:19,633 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 69 selfloop transitions, 16 changer transitions 0/103 dead transitions. [2023-11-28 20:44:19,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 103 transitions, 828 flow [2023-11-28 20:44:19,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 20:44:19,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-28 20:44:19,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 130 transitions. [2023-11-28 20:44:19,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6914893617021277 [2023-11-28 20:44:19,634 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 130 transitions. [2023-11-28 20:44:19,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 130 transitions. [2023-11-28 20:44:19,635 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:44:19,635 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 130 transitions. [2023-11-28 20:44:19,635 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 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) [2023-11-28 20:44:19,636 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 47.0) internal successors, (235), 5 states have internal predecessors, (235), 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) [2023-11-28 20:44:19,636 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 47.0) internal successors, (235), 5 states have internal predecessors, (235), 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) [2023-11-28 20:44:19,637 INFO L175 Difference]: Start difference. First operand has 57 places, 68 transitions, 459 flow. Second operand 4 states and 130 transitions. [2023-11-28 20:44:19,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 103 transitions, 828 flow [2023-11-28 20:44:19,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 103 transitions, 817 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-11-28 20:44:19,654 INFO L231 Difference]: Finished difference. Result has 61 places, 76 transitions, 622 flow [2023-11-28 20:44:19,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=448, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=622, PETRI_PLACES=61, PETRI_TRANSITIONS=76} [2023-11-28 20:44:19,655 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 15 predicate places. [2023-11-28 20:44:19,656 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 76 transitions, 622 flow [2023-11-28 20:44:19,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:44:19,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:44:19,656 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:44:19,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-28 20:44:19,656 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-11-28 20:44:19,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:44:19,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1498779283, now seen corresponding path program 1 times [2023-11-28 20:44:19,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:44:19,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033607415] [2023-11-28 20:44:19,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:44:19,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:44:19,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:44:19,711 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:44:19,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:44:19,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033607415] [2023-11-28 20:44:19,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033607415] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:44:19,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930448362] [2023-11-28 20:44:19,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:44:19,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:44:19,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ca6e31-91c7-49c1-bca2-c0d57d4be92b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:44:19,715 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ca6e31-91c7-49c1-bca2-c0d57d4be92b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:44:19,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ca6e31-91c7-49c1-bca2-c0d57d4be92b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-28 20:44:19,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:44:19,791 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-28 20:44:19,792 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:44:19,823 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:44:19,823 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:44:19,855 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:44:19,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930448362] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:44:19,856 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:44:19,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2023-11-28 20:44:19,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631580025] [2023-11-28 20:44:19,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:44:19,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-28 20:44:19,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:44:19,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-28 20:44:19,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-28 20:44:19,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2023-11-28 20:44:19,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 76 transitions, 622 flow. Second operand has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 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) [2023-11-28 20:44:19,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:44:19,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2023-11-28 20:44:19,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:44:21,641 INFO L124 PetriNetUnfolderBase]: 9259/17498 cut-off events. [2023-11-28 20:44:21,641 INFO L125 PetriNetUnfolderBase]: For 85816/85816 co-relation queries the response was YES. [2023-11-28 20:44:21,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62990 conditions, 17498 events. 9259/17498 cut-off events. For 85816/85816 co-relation queries the response was YES. Maximal size of possible extension queue 618. Compared 146133 event pairs, 353 based on Foata normal form. 894/17170 useless extension candidates. Maximal degree in co-relation 62970. Up to 6679 conditions per place. [2023-11-28 20:44:21,779 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 113 selfloop transitions, 55 changer transitions 0/186 dead transitions. [2023-11-28 20:44:21,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 186 transitions, 1873 flow [2023-11-28 20:44:21,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-28 20:44:21,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-28 20:44:21,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 208 transitions. [2023-11-28 20:44:21,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7375886524822695 [2023-11-28 20:44:21,782 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 208 transitions. [2023-11-28 20:44:21,782 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 208 transitions. [2023-11-28 20:44:21,782 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:44:21,782 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 208 transitions. [2023-11-28 20:44:21,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 34.666666666666664) internal successors, (208), 6 states have internal predecessors, (208), 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) [2023-11-28 20:44:21,784 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 47.0) internal successors, (329), 7 states have internal predecessors, (329), 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) [2023-11-28 20:44:21,785 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 47.0) internal successors, (329), 7 states have internal predecessors, (329), 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) [2023-11-28 20:44:21,785 INFO L175 Difference]: Start difference. First operand has 61 places, 76 transitions, 622 flow. Second operand 6 states and 208 transitions. [2023-11-28 20:44:21,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 186 transitions, 1873 flow [2023-11-28 20:44:21,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 186 transitions, 1869 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-28 20:44:21,827 INFO L231 Difference]: Finished difference. Result has 68 places, 119 transitions, 1444 flow [2023-11-28 20:44:21,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=618, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1444, PETRI_PLACES=68, PETRI_TRANSITIONS=119} [2023-11-28 20:44:21,828 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 22 predicate places. [2023-11-28 20:44:21,828 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 119 transitions, 1444 flow [2023-11-28 20:44:21,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 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) [2023-11-28 20:44:21,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:44:21,829 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:44:21,835 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ca6e31-91c7-49c1-bca2-c0d57d4be92b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-28 20:44:22,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ca6e31-91c7-49c1-bca2-c0d57d4be92b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-28 20:44:22,030 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-11-28 20:44:22,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:44:22,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1979130694, now seen corresponding path program 1 times [2023-11-28 20:44:22,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:44:22,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274320453] [2023-11-28 20:44:22,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:44:22,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:44:22,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:44:22,149 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:44:22,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:44:22,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274320453] [2023-11-28 20:44:22,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274320453] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:44:22,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758367574] [2023-11-28 20:44:22,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:44:22,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:44:22,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ca6e31-91c7-49c1-bca2-c0d57d4be92b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:44:22,152 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ca6e31-91c7-49c1-bca2-c0d57d4be92b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:44:22,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ca6e31-91c7-49c1-bca2-c0d57d4be92b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-28 20:44:22,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:44:22,246 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-28 20:44:22,248 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:44:22,300 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:44:22,300 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:44:22,370 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:44:22,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758367574] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:44:22,371 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:44:22,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-11-28 20:44:22,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924533614] [2023-11-28 20:44:22,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:44:22,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-28 20:44:22,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:44:22,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-28 20:44:22,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2023-11-28 20:44:22,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2023-11-28 20:44:22,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 119 transitions, 1444 flow. Second operand has 10 states, 10 states have (on average 20.6) internal successors, (206), 10 states have internal predecessors, (206), 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) [2023-11-28 20:44:22,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:44:22,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2023-11-28 20:44:22,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:44:27,272 INFO L124 PetriNetUnfolderBase]: 23595/45642 cut-off events. [2023-11-28 20:44:27,272 INFO L125 PetriNetUnfolderBase]: For 477280/477280 co-relation queries the response was YES. [2023-11-28 20:44:27,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171434 conditions, 45642 events. 23595/45642 cut-off events. For 477280/477280 co-relation queries the response was YES. Maximal size of possible extension queue 1292. Compared 434955 event pairs, 355 based on Foata normal form. 6076/48498 useless extension candidates. Maximal degree in co-relation 171410. Up to 16201 conditions per place. [2023-11-28 20:44:27,655 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 216 selfloop transitions, 182 changer transitions 0/416 dead transitions. [2023-11-28 20:44:27,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 416 transitions, 5326 flow [2023-11-28 20:44:27,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-28 20:44:27,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-28 20:44:27,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 365 transitions. [2023-11-28 20:44:27,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.776595744680851 [2023-11-28 20:44:27,658 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 365 transitions. [2023-11-28 20:44:27,658 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 365 transitions. [2023-11-28 20:44:27,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:44:27,659 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 365 transitions. [2023-11-28 20:44:27,661 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 36.5) internal successors, (365), 10 states have internal predecessors, (365), 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) [2023-11-28 20:44:27,662 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 47.0) internal successors, (517), 11 states have internal predecessors, (517), 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) [2023-11-28 20:44:27,662 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 47.0) internal successors, (517), 11 states have internal predecessors, (517), 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) [2023-11-28 20:44:27,663 INFO L175 Difference]: Start difference. First operand has 68 places, 119 transitions, 1444 flow. Second operand 10 states and 365 transitions. [2023-11-28 20:44:27,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 416 transitions, 5326 flow [2023-11-28 20:44:27,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 416 transitions, 5138 flow, removed 92 selfloop flow, removed 1 redundant places. [2023-11-28 20:44:27,809 INFO L231 Difference]: Finished difference. Result has 83 places, 294 transitions, 4769 flow [2023-11-28 20:44:27,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1396, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4769, PETRI_PLACES=83, PETRI_TRANSITIONS=294} [2023-11-28 20:44:27,810 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 37 predicate places. [2023-11-28 20:44:27,811 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 294 transitions, 4769 flow [2023-11-28 20:44:27,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 20.6) internal successors, (206), 10 states have internal predecessors, (206), 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) [2023-11-28 20:44:27,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:44:27,811 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:44:27,816 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ca6e31-91c7-49c1-bca2-c0d57d4be92b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-28 20:44:28,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ca6e31-91c7-49c1-bca2-c0d57d4be92b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:44:28,013 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-11-28 20:44:28,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:44:28,013 INFO L85 PathProgramCache]: Analyzing trace with hash 268140253, now seen corresponding path program 1 times [2023-11-28 20:44:28,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:44:28,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240964715] [2023-11-28 20:44:28,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:44:28,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:44:28,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:44:28,128 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:44:28,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:44:28,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240964715] [2023-11-28 20:44:28,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240964715] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:44:28,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400183255] [2023-11-28 20:44:28,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:44:28,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:44:28,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ca6e31-91c7-49c1-bca2-c0d57d4be92b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:44:28,130 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ca6e31-91c7-49c1-bca2-c0d57d4be92b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:44:28,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ca6e31-91c7-49c1-bca2-c0d57d4be92b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-28 20:44:28,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:44:28,215 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-28 20:44:28,217 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:44:28,269 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:44:28,269 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:44:28,358 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:44:28,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400183255] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:44:28,358 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:44:28,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-28 20:44:28,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315160482] [2023-11-28 20:44:28,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:44:28,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-28 20:44:28,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:44:28,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-28 20:44:28,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=67, Unknown=0, NotChecked=0, Total=132 [2023-11-28 20:44:28,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2023-11-28 20:44:28,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 294 transitions, 4769 flow. Second operand has 12 states, 12 states have (on average 20.5) internal successors, (246), 12 states have internal predecessors, (246), 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) [2023-11-28 20:44:28,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:44:28,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2023-11-28 20:44:28,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:44:47,855 INFO L124 PetriNetUnfolderBase]: 71843/139336 cut-off events. [2023-11-28 20:44:47,855 INFO L125 PetriNetUnfolderBase]: For 1800344/1800344 co-relation queries the response was YES. [2023-11-28 20:44:48,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 618872 conditions, 139336 events. 71843/139336 cut-off events. For 1800344/1800344 co-relation queries the response was YES. Maximal size of possible extension queue 3883. Compared 1518180 event pairs, 1901 based on Foata normal form. 7870/137050 useless extension candidates. Maximal degree in co-relation 618840. Up to 43599 conditions per place. [2023-11-28 20:44:49,281 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 356 selfloop transitions, 918 changer transitions 0/1292 dead transitions. [2023-11-28 20:44:49,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 1292 transitions, 22751 flow [2023-11-28 20:44:49,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-28 20:44:49,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-28 20:44:49,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 442 transitions. [2023-11-28 20:44:49,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7836879432624113 [2023-11-28 20:44:49,284 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 442 transitions. [2023-11-28 20:44:49,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 442 transitions. [2023-11-28 20:44:49,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:44:49,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 442 transitions. [2023-11-28 20:44:49,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 36.833333333333336) internal successors, (442), 12 states have internal predecessors, (442), 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) [2023-11-28 20:44:49,287 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 47.0) internal successors, (611), 13 states have internal predecessors, (611), 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) [2023-11-28 20:44:49,287 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 47.0) internal successors, (611), 13 states have internal predecessors, (611), 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) [2023-11-28 20:44:49,287 INFO L175 Difference]: Start difference. First operand has 83 places, 294 transitions, 4769 flow. Second operand 12 states and 442 transitions. [2023-11-28 20:44:49,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 1292 transitions, 22751 flow [2023-11-28 20:44:53,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 1292 transitions, 21791 flow, removed 478 selfloop flow, removed 1 redundant places. [2023-11-28 20:44:53,344 INFO L231 Difference]: Finished difference. Result has 102 places, 1159 transitions, 23110 flow [2023-11-28 20:44:53,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4549, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=23110, PETRI_PLACES=102, PETRI_TRANSITIONS=1159} [2023-11-28 20:44:53,345 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 56 predicate places. [2023-11-28 20:44:53,345 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 1159 transitions, 23110 flow [2023-11-28 20:44:53,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 20.5) internal successors, (246), 12 states have internal predecessors, (246), 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) [2023-11-28 20:44:53,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:44:53,345 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:44:53,349 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ca6e31-91c7-49c1-bca2-c0d57d4be92b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-28 20:44:53,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ca6e31-91c7-49c1-bca2-c0d57d4be92b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:44:53,546 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-11-28 20:44:53,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:44:53,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1372545522, now seen corresponding path program 1 times [2023-11-28 20:44:53,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:44:53,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912355864] [2023-11-28 20:44:53,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:44:53,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:44:53,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:44:53,621 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-28 20:44:53,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:44:53,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912355864] [2023-11-28 20:44:53,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912355864] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:44:53,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:44:53,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-28 20:44:53,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282202338] [2023-11-28 20:44:53,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:44:53,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:44:53,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:44:53,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:44:53,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:44:53,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 47 [2023-11-28 20:44:53,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 1159 transitions, 23110 flow. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:44:53,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:44:53,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 47 [2023-11-28 20:44:53,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:45:41,918 INFO L124 PetriNetUnfolderBase]: 109411/185003 cut-off events. [2023-11-28 20:45:41,918 INFO L125 PetriNetUnfolderBase]: For 2729444/2754896 co-relation queries the response was YES. [2023-11-28 20:45:42,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 852893 conditions, 185003 events. 109411/185003 cut-off events. For 2729444/2754896 co-relation queries the response was YES. Maximal size of possible extension queue 4412. Compared 1849093 event pairs, 26627 based on Foata normal form. 6126/172897 useless extension candidates. Maximal degree in co-relation 852851. Up to 89179 conditions per place. [2023-11-28 20:45:43,740 INFO L140 encePairwiseOnDemand]: 43/47 looper letters, 1284 selfloop transitions, 3 changer transitions 0/1302 dead transitions. [2023-11-28 20:45:43,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 1302 transitions, 27942 flow [2023-11-28 20:45:43,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:45:43,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-28 20:45:43,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 89 transitions. [2023-11-28 20:45:43,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6312056737588653 [2023-11-28 20:45:43,742 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 89 transitions. [2023-11-28 20:45:43,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 89 transitions. [2023-11-28 20:45:43,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:45:43,742 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 89 transitions. [2023-11-28 20:45:43,742 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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) [2023-11-28 20:45:43,743 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 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) [2023-11-28 20:45:43,743 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 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) [2023-11-28 20:45:43,743 INFO L175 Difference]: Start difference. First operand has 102 places, 1159 transitions, 23110 flow. Second operand 3 states and 89 transitions. [2023-11-28 20:45:43,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 1302 transitions, 27942 flow [2023-11-28 20:45:55,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 1302 transitions, 25720 flow, removed 940 selfloop flow, removed 3 redundant places. [2023-11-28 20:45:55,825 INFO L231 Difference]: Finished difference. Result has 103 places, 941 transitions, 16580 flow [2023-11-28 20:45:55,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=16558, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=939, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=936, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=16580, PETRI_PLACES=103, PETRI_TRANSITIONS=941} [2023-11-28 20:45:55,827 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 57 predicate places. [2023-11-28 20:45:55,827 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 941 transitions, 16580 flow [2023-11-28 20:45:55,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:45:55,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:45:55,827 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:45:55,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-28 20:45:55,827 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-11-28 20:45:55,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:45:55,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1396455768, now seen corresponding path program 1 times [2023-11-28 20:45:55,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:45:55,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467029523] [2023-11-28 20:45:55,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:45:55,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:45:55,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:45:55,967 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:45:55,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:45:55,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467029523] [2023-11-28 20:45:55,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467029523] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:45:55,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430580472] [2023-11-28 20:45:55,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:45:55,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:45:55,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ca6e31-91c7-49c1-bca2-c0d57d4be92b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:45:55,972 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ca6e31-91c7-49c1-bca2-c0d57d4be92b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:45:55,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ca6e31-91c7-49c1-bca2-c0d57d4be92b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-28 20:45:56,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:45:56,059 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-28 20:45:56,061 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:45:56,110 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:45:56,110 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:45:56,216 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:45:56,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430580472] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:45:56,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:45:56,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-28 20:45:56,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242635811] [2023-11-28 20:45:56,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:45:56,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-28 20:45:56,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:45:56,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-28 20:45:56,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2023-11-28 20:45:56,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2023-11-28 20:45:56,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 941 transitions, 16580 flow. Second operand has 14 states, 14 states have (on average 20.428571428571427) internal successors, (286), 14 states have internal predecessors, (286), 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) [2023-11-28 20:45:56,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:45:56,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2023-11-28 20:45:56,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:47:44,943 INFO L124 PetriNetUnfolderBase]: 224553/447573 cut-off events. [2023-11-28 20:47:44,943 INFO L125 PetriNetUnfolderBase]: For 7595702/7595702 co-relation queries the response was YES. [2023-11-28 20:47:47,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1934023 conditions, 447573 events. 224553/447573 cut-off events. For 7595702/7595702 co-relation queries the response was YES. Maximal size of possible extension queue 9290. Compared 5622626 event pairs, 5899 based on Foata normal form. 34812/459752 useless extension candidates. Maximal degree in co-relation 1933980. Up to 73909 conditions per place. [2023-11-28 20:47:50,109 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 845 selfloop transitions, 2938 changer transitions 0/3803 dead transitions. [2023-11-28 20:47:50,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 3803 transitions, 67058 flow [2023-11-28 20:47:50,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-28 20:47:50,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-28 20:47:50,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 520 transitions. [2023-11-28 20:47:50,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.790273556231003 [2023-11-28 20:47:50,113 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 520 transitions. [2023-11-28 20:47:50,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 520 transitions. [2023-11-28 20:47:50,114 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:47:50,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 520 transitions. [2023-11-28 20:47:50,116 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 37.142857142857146) internal successors, (520), 14 states have internal predecessors, (520), 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) [2023-11-28 20:47:50,119 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 47.0) internal successors, (705), 15 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:47:50,119 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 47.0) internal successors, (705), 15 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:47:50,119 INFO L175 Difference]: Start difference. First operand has 103 places, 941 transitions, 16580 flow. Second operand 14 states and 520 transitions. [2023-11-28 20:47:50,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 3803 transitions, 67058 flow [2023-11-28 20:49:46,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 3803 transitions, 67052 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-28 20:49:46,421 INFO L231 Difference]: Finished difference. Result has 125 places, 3448 transitions, 69822 flow [2023-11-28 20:49:46,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=16574, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=941, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=685, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=69822, PETRI_PLACES=125, PETRI_TRANSITIONS=3448} [2023-11-28 20:49:46,423 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 79 predicate places. [2023-11-28 20:49:46,423 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 3448 transitions, 69822 flow [2023-11-28 20:49:46,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 20.428571428571427) internal successors, (286), 14 states have internal predecessors, (286), 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) [2023-11-28 20:49:46,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:49:46,423 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:49:46,429 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ca6e31-91c7-49c1-bca2-c0d57d4be92b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-28 20:49:46,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ca6e31-91c7-49c1-bca2-c0d57d4be92b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:49:46,624 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-11-28 20:49:46,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:49:46,624 INFO L85 PathProgramCache]: Analyzing trace with hash -195082571, now seen corresponding path program 1 times [2023-11-28 20:49:46,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:49:46,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313277161] [2023-11-28 20:49:46,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:49:46,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:49:46,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:49:46,821 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:49:46,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:49:46,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313277161] [2023-11-28 20:49:46,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313277161] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:49:46,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647365254] [2023-11-28 20:49:46,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:49:46,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:49:46,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ca6e31-91c7-49c1-bca2-c0d57d4be92b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:49:46,824 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ca6e31-91c7-49c1-bca2-c0d57d4be92b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:49:46,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ca6e31-91c7-49c1-bca2-c0d57d4be92b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-28 20:49:46,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:49:46,917 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-28 20:49:46,919 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:49:46,990 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:49:46,990 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:49:47,139 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 2 proven. 115 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-28 20:49:47,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647365254] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:49:47,140 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:49:47,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 15 [2023-11-28 20:49:47,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495662748] [2023-11-28 20:49:47,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:49:47,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-28 20:49:47,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:49:47,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-28 20:49:47,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=137, Unknown=0, NotChecked=0, Total=272 [2023-11-28 20:49:47,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2023-11-28 20:49:47,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 3448 transitions, 69822 flow. Second operand has 17 states, 17 states have (on average 20.41176470588235) internal successors, (347), 17 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:49:47,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:49:47,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2023-11-28 20:49:47,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand