./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-more-buffer-mult.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460b51f7-df5a-4c35-92e7-82a29481d629/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460b51f7-df5a-4c35-92e7-82a29481d629/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_460b51f7-df5a-4c35-92e7-82a29481d629/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460b51f7-df5a-4c35-92e7-82a29481d629/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-buffer-mult.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460b51f7-df5a-4c35-92e7-82a29481d629/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_460b51f7-df5a-4c35-92e7-82a29481d629/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 e5124dd4a5a155d8a4e322a35428820633f9eccdd993e14120e650d1ba1fbebe --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 05:53:28,470 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 05:53:28,571 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460b51f7-df5a-4c35-92e7-82a29481d629/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-11-29 05:53:28,575 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 05:53:28,576 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 05:53:28,599 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 05:53:28,600 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 05:53:28,600 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 05:53:28,601 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 05:53:28,602 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 05:53:28,602 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 05:53:28,603 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 05:53:28,603 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 05:53:28,604 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 05:53:28,604 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 05:53:28,605 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 05:53:28,605 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 05:53:28,606 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 05:53:28,606 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 05:53:28,607 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 05:53:28,607 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 05:53:28,608 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 05:53:28,608 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 05:53:28,609 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 05:53:28,609 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-29 05:53:28,610 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 05:53:28,610 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 05:53:28,610 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 05:53:28,611 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 05:53:28,611 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 05:53:28,612 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 05:53:28,612 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 05:53:28,612 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 05:53:28,613 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:53:28,613 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 05:53:28,613 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 05:53:28,613 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 05:53:28,613 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 05:53:28,614 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 05:53:28,614 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 05:53:28,614 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 05:53:28,614 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 05:53:28,615 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 05:53:28,615 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 05:53:28,615 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_460b51f7-df5a-4c35-92e7-82a29481d629/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460b51f7-df5a-4c35-92e7-82a29481d629/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e5124dd4a5a155d8a4e322a35428820633f9eccdd993e14120e650d1ba1fbebe [2023-11-29 05:53:28,858 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 05:53:28,879 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 05:53:28,881 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 05:53:28,882 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 05:53:28,883 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 05:53:28,884 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460b51f7-df5a-4c35-92e7-82a29481d629/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/popl20-more-buffer-mult.wvr.c [2023-11-29 05:53:31,621 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 05:53:31,810 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 05:53:31,810 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460b51f7-df5a-4c35-92e7-82a29481d629/sv-benchmarks/c/weaver/popl20-more-buffer-mult.wvr.c [2023-11-29 05:53:31,820 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460b51f7-df5a-4c35-92e7-82a29481d629/bin/uautomizer-verify-BQ2R08f2Ya/data/9a4fbb1a3/d161ddef650a4857bd7f86115cff9541/FLAGcae8d5613 [2023-11-29 05:53:31,834 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460b51f7-df5a-4c35-92e7-82a29481d629/bin/uautomizer-verify-BQ2R08f2Ya/data/9a4fbb1a3/d161ddef650a4857bd7f86115cff9541 [2023-11-29 05:53:31,837 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 05:53:31,838 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 05:53:31,840 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 05:53:31,840 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 05:53:31,845 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 05:53:31,846 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:53:31" (1/1) ... [2023-11-29 05:53:31,847 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@444a5c90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:53:31, skipping insertion in model container [2023-11-29 05:53:31,847 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:53:31" (1/1) ... [2023-11-29 05:53:31,877 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 05:53:32,100 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:53:32,110 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 05:53:32,142 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:53:32,152 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 05:53:32,152 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 05:53:32,159 INFO L206 MainTranslator]: Completed translation [2023-11-29 05:53:32,160 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:53:32 WrapperNode [2023-11-29 05:53:32,160 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 05:53:32,161 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 05:53:32,161 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 05:53:32,161 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 05:53:32,166 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:53:32" (1/1) ... [2023-11-29 05:53:32,177 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:53:32" (1/1) ... [2023-11-29 05:53:32,208 INFO L138 Inliner]: procedures = 27, calls = 81, calls flagged for inlining = 19, calls inlined = 23, statements flattened = 368 [2023-11-29 05:53:32,209 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 05:53:32,210 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 05:53:32,210 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 05:53:32,210 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 05:53:32,219 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:53:32" (1/1) ... [2023-11-29 05:53:32,220 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:53:32" (1/1) ... [2023-11-29 05:53:32,226 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:53:32" (1/1) ... [2023-11-29 05:53:32,243 INFO L175 MemorySlicer]: Split 16 memory accesses to 6 slices as follows [2, 2, 6, 2, 2, 2]. 38 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0]. The 6 writes are split as follows [0, 1, 2, 1, 1, 1]. [2023-11-29 05:53:32,243 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:53:32" (1/1) ... [2023-11-29 05:53:32,243 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:53:32" (1/1) ... [2023-11-29 05:53:32,258 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:53:32" (1/1) ... [2023-11-29 05:53:32,263 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:53:32" (1/1) ... [2023-11-29 05:53:32,266 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:53:32" (1/1) ... [2023-11-29 05:53:32,268 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:53:32" (1/1) ... [2023-11-29 05:53:32,273 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 05:53:32,274 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 05:53:32,274 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 05:53:32,274 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 05:53:32,275 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:53:32" (1/1) ... [2023-11-29 05:53:32,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:53:32,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460b51f7-df5a-4c35-92e7-82a29481d629/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:53:32,303 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460b51f7-df5a-4c35-92e7-82a29481d629/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 05:53:32,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460b51f7-df5a-4c35-92e7-82a29481d629/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 05:53:32,329 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 05:53:32,330 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 05:53:32,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 05:53:32,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 05:53:32,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 05:53:32,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 05:53:32,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-29 05:53:32,331 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2023-11-29 05:53:32,331 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 05:53:32,331 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 05:53:32,331 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 05:53:32,331 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 05:53:32,331 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-29 05:53:32,331 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2023-11-29 05:53:32,332 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 05:53:32,332 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 05:53:32,332 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 05:53:32,332 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 05:53:32,332 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-29 05:53:32,332 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-29 05:53:32,332 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-11-29 05:53:32,333 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-11-29 05:53:32,333 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 05:53:32,333 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 05:53:32,333 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 05:53:32,333 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 05:53:32,333 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-29 05:53:32,333 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-29 05:53:32,333 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-29 05:53:32,334 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-29 05:53:32,334 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 05:53:32,334 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 05:53:32,334 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 05:53:32,334 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 05:53:32,335 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-29 05:53:32,462 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 05:53:32,463 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 05:53:32,915 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 05:53:33,499 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 05:53:33,499 INFO L309 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-29 05:53:33,500 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:53:33 BoogieIcfgContainer [2023-11-29 05:53:33,500 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 05:53:33,503 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 05:53:33,503 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 05:53:33,505 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 05:53:33,506 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 05:53:31" (1/3) ... [2023-11-29 05:53:33,506 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e9c81be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:53:33, skipping insertion in model container [2023-11-29 05:53:33,506 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:53:32" (2/3) ... [2023-11-29 05:53:33,507 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e9c81be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:53:33, skipping insertion in model container [2023-11-29 05:53:33,507 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:53:33" (3/3) ... [2023-11-29 05:53:33,508 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-mult.wvr.c [2023-11-29 05:53:33,516 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-29 05:53:33,524 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 05:53:33,525 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2023-11-29 05:53:33,525 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 05:53:33,664 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-29 05:53:33,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 92 places, 85 transitions, 198 flow [2023-11-29 05:53:33,733 INFO L124 PetriNetUnfolderBase]: 6/81 cut-off events. [2023-11-29 05:53:33,733 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-29 05:53:33,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98 conditions, 81 events. 6/81 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 275 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 65. Up to 2 conditions per place. [2023-11-29 05:53:33,737 INFO L82 GeneralOperation]: Start removeDead. Operand has 92 places, 85 transitions, 198 flow [2023-11-29 05:53:33,742 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 86 places, 79 transitions, 179 flow [2023-11-29 05:53:33,749 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 05:53:33,755 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;@755a7ffe, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 05:53:33,755 INFO L358 AbstractCegarLoop]: Starting to check reachability of 60 error locations. [2023-11-29 05:53:33,759 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 05:53:33,759 INFO L124 PetriNetUnfolderBase]: 0/3 cut-off events. [2023-11-29 05:53:33,759 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 05:53:33,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:53:33,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 05:53:33,760 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 57 more)] === [2023-11-29 05:53:33,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:53:33,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1110169, now seen corresponding path program 1 times [2023-11-29 05:53:33,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:53:33,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075881566] [2023-11-29 05:53:33,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:53:33,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:53:33,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:53:34,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:53:34,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:53:34,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075881566] [2023-11-29 05:53:34,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075881566] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:53:34,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:53:34,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 05:53:34,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104272822] [2023-11-29 05:53:34,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:53:34,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:53:34,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:53:34,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:53:34,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:53:34,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 85 [2023-11-29 05:53:34,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 79 transitions, 179 flow. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 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) [2023-11-29 05:53:34,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:53:34,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 85 [2023-11-29 05:53:34,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:53:41,174 INFO L124 PetriNetUnfolderBase]: 40357/54135 cut-off events. [2023-11-29 05:53:41,174 INFO L125 PetriNetUnfolderBase]: For 1242/1242 co-relation queries the response was YES. [2023-11-29 05:53:41,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106452 conditions, 54135 events. 40357/54135 cut-off events. For 1242/1242 co-relation queries the response was YES. Maximal size of possible extension queue 5593. Compared 396349 event pairs, 30313 based on Foata normal form. 2/25683 useless extension candidates. Maximal degree in co-relation 95328. Up to 50509 conditions per place. [2023-11-29 05:53:41,629 INFO L140 encePairwiseOnDemand]: 66/85 looper letters, 52 selfloop transitions, 7 changer transitions 0/77 dead transitions. [2023-11-29 05:53:41,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 77 transitions, 293 flow [2023-11-29 05:53:41,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:53:41,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 05:53:41,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 159 transitions. [2023-11-29 05:53:41,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4676470588235294 [2023-11-29 05:53:41,643 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 159 transitions. [2023-11-29 05:53:41,644 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 159 transitions. [2023-11-29 05:53:41,645 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:53:41,647 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 159 transitions. [2023-11-29 05:53:41,650 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 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) [2023-11-29 05:53:41,655 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 85.0) internal successors, (425), 5 states have internal predecessors, (425), 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) [2023-11-29 05:53:41,655 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 85.0) internal successors, (425), 5 states have internal predecessors, (425), 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) [2023-11-29 05:53:41,657 INFO L175 Difference]: Start difference. First operand has 86 places, 79 transitions, 179 flow. Second operand 4 states and 159 transitions. [2023-11-29 05:53:41,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 77 transitions, 293 flow [2023-11-29 05:53:41,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 77 transitions, 280 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-11-29 05:53:41,762 INFO L231 Difference]: Finished difference. Result has 77 places, 77 transitions, 210 flow [2023-11-29 05:53:41,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=210, PETRI_PLACES=77, PETRI_TRANSITIONS=77} [2023-11-29 05:53:41,768 INFO L281 CegarLoopForPetriNet]: 86 programPoint places, -9 predicate places. [2023-11-29 05:53:41,768 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 77 transitions, 210 flow [2023-11-29 05:53:41,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 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) [2023-11-29 05:53:41,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:53:41,769 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-29 05:53:41,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 05:53:41,770 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 57 more)] === [2023-11-29 05:53:41,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:53:41,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1285571988, now seen corresponding path program 1 times [2023-11-29 05:53:41,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:53:41,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691912491] [2023-11-29 05:53:41,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:53:41,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:53:41,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:53:41,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:53:41,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:53:41,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691912491] [2023-11-29 05:53:41,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691912491] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:53:41,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646918156] [2023-11-29 05:53:41,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:53:41,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:53:41,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460b51f7-df5a-4c35-92e7-82a29481d629/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:53:41,900 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460b51f7-df5a-4c35-92e7-82a29481d629/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:53:41,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460b51f7-df5a-4c35-92e7-82a29481d629/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 05:53:42,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:53:42,071 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 05:53:42,076 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:53:42,126 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:53:42,126 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:53:42,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646918156] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:53:42,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:53:42,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-11-29 05:53:42,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918779912] [2023-11-29 05:53:42,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:53:42,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 05:53:42,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:53:42,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 05:53:42,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-29 05:53:42,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 85 [2023-11-29 05:53:42,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 77 transitions, 210 flow. Second operand has 6 states, 6 states have (on average 22.833333333333332) internal successors, (137), 6 states have internal predecessors, (137), 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) [2023-11-29 05:53:42,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:53:42,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 85 [2023-11-29 05:53:42,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:53:48,304 INFO L124 PetriNetUnfolderBase]: 40357/54133 cut-off events. [2023-11-29 05:53:48,304 INFO L125 PetriNetUnfolderBase]: For 201/201 co-relation queries the response was YES. [2023-11-29 05:53:48,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105750 conditions, 54133 events. 40357/54133 cut-off events. For 201/201 co-relation queries the response was YES. Maximal size of possible extension queue 5593. Compared 395903 event pairs, 30313 based on Foata normal form. 2/25684 useless extension candidates. Maximal degree in co-relation 105700. Up to 50499 conditions per place. [2023-11-29 05:53:48,700 INFO L140 encePairwiseOnDemand]: 76/85 looper letters, 45 selfloop transitions, 12 changer transitions 0/75 dead transitions. [2023-11-29 05:53:48,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 75 transitions, 316 flow [2023-11-29 05:53:48,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 05:53:48,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 05:53:48,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 191 transitions. [2023-11-29 05:53:48,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37450980392156863 [2023-11-29 05:53:48,703 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 191 transitions. [2023-11-29 05:53:48,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 191 transitions. [2023-11-29 05:53:48,704 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:53:48,704 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 191 transitions. [2023-11-29 05:53:48,705 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.833333333333332) internal successors, (191), 6 states have internal predecessors, (191), 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) [2023-11-29 05:53:48,708 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 85.0) internal successors, (595), 7 states have internal predecessors, (595), 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) [2023-11-29 05:53:48,709 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 85.0) internal successors, (595), 7 states have internal predecessors, (595), 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) [2023-11-29 05:53:48,709 INFO L175 Difference]: Start difference. First operand has 77 places, 77 transitions, 210 flow. Second operand 6 states and 191 transitions. [2023-11-29 05:53:48,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 75 transitions, 316 flow [2023-11-29 05:53:48,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 75 transitions, 316 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 05:53:48,712 INFO L231 Difference]: Finished difference. Result has 80 places, 75 transitions, 226 flow [2023-11-29 05:53:48,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=226, PETRI_PLACES=80, PETRI_TRANSITIONS=75} [2023-11-29 05:53:48,714 INFO L281 CegarLoopForPetriNet]: 86 programPoint places, -6 predicate places. [2023-11-29 05:53:48,714 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 75 transitions, 226 flow [2023-11-29 05:53:48,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.833333333333332) internal successors, (137), 6 states have internal predecessors, (137), 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) [2023-11-29 05:53:48,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:53:48,714 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2023-11-29 05:53:48,721 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460b51f7-df5a-4c35-92e7-82a29481d629/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 05:53:48,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460b51f7-df5a-4c35-92e7-82a29481d629/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:53:48,915 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 57 more)] === [2023-11-29 05:53:48,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:53:48,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1198024834, now seen corresponding path program 1 times [2023-11-29 05:53:48,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:53:48,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926386] [2023-11-29 05:53:48,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:53:48,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:53:48,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:53:49,014 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:53:49,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:53:49,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926386] [2023-11-29 05:53:49,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926386] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:53:49,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979851473] [2023-11-29 05:53:49,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:53:49,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:53:49,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460b51f7-df5a-4c35-92e7-82a29481d629/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:53:49,016 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460b51f7-df5a-4c35-92e7-82a29481d629/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:53:49,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460b51f7-df5a-4c35-92e7-82a29481d629/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 05:53:49,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:53:49,150 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 05:53:49,151 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:53:49,182 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:53:49,182 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:53:49,222 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:53:49,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979851473] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:53:49,223 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:53:49,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-11-29 05:53:49,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259484690] [2023-11-29 05:53:49,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:53:49,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 05:53:49,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:53:49,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 05:53:49,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-29 05:53:49,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 85 [2023-11-29 05:53:49,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 75 transitions, 226 flow. Second operand has 12 states, 12 states have (on average 23.083333333333332) internal successors, (277), 12 states have internal predecessors, (277), 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) [2023-11-29 05:53:49,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:53:49,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 85 [2023-11-29 05:53:49,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:53:54,984 INFO L124 PetriNetUnfolderBase]: 40363/54157 cut-off events. [2023-11-29 05:53:54,984 INFO L125 PetriNetUnfolderBase]: For 243/243 co-relation queries the response was YES. [2023-11-29 05:53:55,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105844 conditions, 54157 events. 40363/54157 cut-off events. For 243/243 co-relation queries the response was YES. Maximal size of possible extension queue 5593. Compared 396248 event pairs, 30313 based on Foata normal form. 6/25711 useless extension candidates. Maximal degree in co-relation 105702. Up to 50510 conditions per place. [2023-11-29 05:53:55,297 INFO L140 encePairwiseOnDemand]: 76/85 looper letters, 50 selfloop transitions, 25 changer transitions 0/93 dead transitions. [2023-11-29 05:53:55,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 93 transitions, 490 flow [2023-11-29 05:53:55,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 05:53:55,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 05:53:55,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 301 transitions. [2023-11-29 05:53:55,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35411764705882354 [2023-11-29 05:53:55,300 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 301 transitions. [2023-11-29 05:53:55,300 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 301 transitions. [2023-11-29 05:53:55,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:53:55,300 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 301 transitions. [2023-11-29 05:53:55,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 30.1) internal successors, (301), 10 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:53:55,304 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 85.0) internal successors, (935), 11 states have internal predecessors, (935), 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) [2023-11-29 05:53:55,305 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 85.0) internal successors, (935), 11 states have internal predecessors, (935), 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) [2023-11-29 05:53:55,305 INFO L175 Difference]: Start difference. First operand has 80 places, 75 transitions, 226 flow. Second operand 10 states and 301 transitions. [2023-11-29 05:53:55,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 93 transitions, 490 flow [2023-11-29 05:53:55,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 93 transitions, 432 flow, removed 12 selfloop flow, removed 5 redundant places. [2023-11-29 05:53:55,310 INFO L231 Difference]: Finished difference. Result has 87 places, 93 transitions, 366 flow [2023-11-29 05:53:55,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=366, PETRI_PLACES=87, PETRI_TRANSITIONS=93} [2023-11-29 05:53:55,311 INFO L281 CegarLoopForPetriNet]: 86 programPoint places, 1 predicate places. [2023-11-29 05:53:55,311 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 93 transitions, 366 flow [2023-11-29 05:53:55,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 23.083333333333332) internal successors, (277), 12 states have internal predecessors, (277), 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) [2023-11-29 05:53:55,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:53:55,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:53:55,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460b51f7-df5a-4c35-92e7-82a29481d629/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-29 05:53:55,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460b51f7-df5a-4c35-92e7-82a29481d629/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:53:55,513 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 57 more)] === [2023-11-29 05:53:55,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:53:55,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1958691987, now seen corresponding path program 1 times [2023-11-29 05:53:55,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:53:55,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691238055] [2023-11-29 05:53:55,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:53:55,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:53:55,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:53:55,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:53:55,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:53:55,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691238055] [2023-11-29 05:53:55,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691238055] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:53:55,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:53:55,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 05:53:55,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728817892] [2023-11-29 05:53:55,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:53:55,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:53:55,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:53:55,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:53:55,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:53:55,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 85 [2023-11-29 05:53:55,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 93 transitions, 366 flow. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:53:55,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:53:55,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 85 [2023-11-29 05:53:55,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:54:02,213 INFO L124 PetriNetUnfolderBase]: 43126/57330 cut-off events. [2023-11-29 05:54:02,213 INFO L125 PetriNetUnfolderBase]: For 160/160 co-relation queries the response was YES. [2023-11-29 05:54:02,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112930 conditions, 57330 events. 43126/57330 cut-off events. For 160/160 co-relation queries the response was YES. Maximal size of possible extension queue 5648. Compared 414732 event pairs, 32516 based on Foata normal form. 790/27784 useless extension candidates. Maximal degree in co-relation 112834. Up to 50525 conditions per place. [2023-11-29 05:54:02,547 INFO L140 encePairwiseOnDemand]: 72/85 looper letters, 114 selfloop transitions, 5 changer transitions 0/139 dead transitions. [2023-11-29 05:54:02,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 139 transitions, 777 flow [2023-11-29 05:54:02,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:54:02,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 05:54:02,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 227 transitions. [2023-11-29 05:54:02,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5341176470588235 [2023-11-29 05:54:02,549 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 227 transitions. [2023-11-29 05:54:02,549 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 227 transitions. [2023-11-29 05:54:02,550 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:54:02,550 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 227 transitions. [2023-11-29 05:54:02,551 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 45.4) internal successors, (227), 5 states have internal predecessors, (227), 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) [2023-11-29 05:54:02,552 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 85.0) internal successors, (510), 6 states have internal predecessors, (510), 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) [2023-11-29 05:54:02,553 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 85.0) internal successors, (510), 6 states have internal predecessors, (510), 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) [2023-11-29 05:54:02,553 INFO L175 Difference]: Start difference. First operand has 87 places, 93 transitions, 366 flow. Second operand 5 states and 227 transitions. [2023-11-29 05:54:02,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 139 transitions, 777 flow [2023-11-29 05:54:02,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 139 transitions, 743 flow, removed 9 selfloop flow, removed 2 redundant places. [2023-11-29 05:54:02,557 INFO L231 Difference]: Finished difference. Result has 91 places, 95 transitions, 389 flow [2023-11-29 05:54:02,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=389, PETRI_PLACES=91, PETRI_TRANSITIONS=95} [2023-11-29 05:54:02,559 INFO L281 CegarLoopForPetriNet]: 86 programPoint places, 5 predicate places. [2023-11-29 05:54:02,559 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 95 transitions, 389 flow [2023-11-29 05:54:02,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:54:02,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:54:02,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:54:02,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 05:54:02,560 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 57 more)] === [2023-11-29 05:54:02,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:54:02,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1638286495, now seen corresponding path program 1 times [2023-11-29 05:54:02,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:54:02,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831366945] [2023-11-29 05:54:02,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:54:02,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:54:02,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:54:02,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:54:02,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:54:02,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831366945] [2023-11-29 05:54:02,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831366945] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:54:02,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:54:02,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 05:54:02,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537447488] [2023-11-29 05:54:02,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:54:02,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:54:02,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:54:02,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:54:02,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:54:02,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 85 [2023-11-29 05:54:02,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 95 transitions, 389 flow. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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) [2023-11-29 05:54:02,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:54:02,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 85 [2023-11-29 05:54:02,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:54:08,131 INFO L124 PetriNetUnfolderBase]: 37522/52146 cut-off events. [2023-11-29 05:54:08,131 INFO L125 PetriNetUnfolderBase]: For 3788/3788 co-relation queries the response was YES. [2023-11-29 05:54:08,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112524 conditions, 52146 events. 37522/52146 cut-off events. For 3788/3788 co-relation queries the response was YES. Maximal size of possible extension queue 5129. Compared 404633 event pairs, 28798 based on Foata normal form. 0/26123 useless extension candidates. Maximal degree in co-relation 112429. Up to 47621 conditions per place. [2023-11-29 05:54:08,467 INFO L140 encePairwiseOnDemand]: 83/85 looper letters, 73 selfloop transitions, 1 changer transitions 0/94 dead transitions. [2023-11-29 05:54:08,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 94 transitions, 535 flow [2023-11-29 05:54:08,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:54:08,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 05:54:08,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 127 transitions. [2023-11-29 05:54:08,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4980392156862745 [2023-11-29 05:54:08,468 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 127 transitions. [2023-11-29 05:54:08,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 127 transitions. [2023-11-29 05:54:08,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:54:08,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 127 transitions. [2023-11-29 05:54:08,469 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 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) [2023-11-29 05:54:08,470 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 85.0) internal successors, (340), 4 states have internal predecessors, (340), 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) [2023-11-29 05:54:08,470 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 85.0) internal successors, (340), 4 states have internal predecessors, (340), 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) [2023-11-29 05:54:08,470 INFO L175 Difference]: Start difference. First operand has 91 places, 95 transitions, 389 flow. Second operand 3 states and 127 transitions. [2023-11-29 05:54:08,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 94 transitions, 535 flow [2023-11-29 05:54:08,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 94 transitions, 531 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-29 05:54:08,477 INFO L231 Difference]: Finished difference. Result has 91 places, 94 transitions, 385 flow [2023-11-29 05:54:08,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=385, PETRI_PLACES=91, PETRI_TRANSITIONS=94} [2023-11-29 05:54:08,478 INFO L281 CegarLoopForPetriNet]: 86 programPoint places, 5 predicate places. [2023-11-29 05:54:08,478 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 94 transitions, 385 flow [2023-11-29 05:54:08,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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) [2023-11-29 05:54:08,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:54:08,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:54:08,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 05:54:08,479 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 57 more)] === [2023-11-29 05:54:08,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:54:08,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1638286496, now seen corresponding path program 1 times [2023-11-29 05:54:08,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:54:08,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65056583] [2023-11-29 05:54:08,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:54:08,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:54:08,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:54:08,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:54:08,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:54:08,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65056583] [2023-11-29 05:54:08,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65056583] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:54:08,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:54:08,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 05:54:08,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545368839] [2023-11-29 05:54:08,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:54:08,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:54:08,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:54:08,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:54:08,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:54:08,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 85 [2023-11-29 05:54:08,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 94 transitions, 385 flow. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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) [2023-11-29 05:54:08,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:54:08,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 85 [2023-11-29 05:54:08,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:54:13,045 INFO L124 PetriNetUnfolderBase]: 32077/45025 cut-off events. [2023-11-29 05:54:13,046 INFO L125 PetriNetUnfolderBase]: For 3362/3362 co-relation queries the response was YES. [2023-11-29 05:54:13,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97174 conditions, 45025 events. 32077/45025 cut-off events. For 3362/3362 co-relation queries the response was YES. Maximal size of possible extension queue 4362. Compared 349366 event pairs, 25080 based on Foata normal form. 0/24115 useless extension candidates. Maximal degree in co-relation 97158. Up to 40922 conditions per place. [2023-11-29 05:54:13,323 INFO L140 encePairwiseOnDemand]: 83/85 looper letters, 67 selfloop transitions, 6 changer transitions 0/93 dead transitions. [2023-11-29 05:54:13,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 93 transitions, 529 flow [2023-11-29 05:54:13,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:54:13,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 05:54:13,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 126 transitions. [2023-11-29 05:54:13,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49411764705882355 [2023-11-29 05:54:13,325 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 126 transitions. [2023-11-29 05:54:13,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 126 transitions. [2023-11-29 05:54:13,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:54:13,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 126 transitions. [2023-11-29 05:54:13,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 42.0) internal successors, (126), 3 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) [2023-11-29 05:54:13,326 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 85.0) internal successors, (340), 4 states have internal predecessors, (340), 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) [2023-11-29 05:54:13,326 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 85.0) internal successors, (340), 4 states have internal predecessors, (340), 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) [2023-11-29 05:54:13,326 INFO L175 Difference]: Start difference. First operand has 91 places, 94 transitions, 385 flow. Second operand 3 states and 126 transitions. [2023-11-29 05:54:13,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 93 transitions, 529 flow [2023-11-29 05:54:13,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 93 transitions, 518 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 05:54:13,335 INFO L231 Difference]: Finished difference. Result has 90 places, 93 transitions, 384 flow [2023-11-29 05:54:13,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=384, PETRI_PLACES=90, PETRI_TRANSITIONS=93} [2023-11-29 05:54:13,336 INFO L281 CegarLoopForPetriNet]: 86 programPoint places, 4 predicate places. [2023-11-29 05:54:13,336 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 93 transitions, 384 flow [2023-11-29 05:54:13,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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) [2023-11-29 05:54:13,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:54:13,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:54:13,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-29 05:54:13,337 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 57 more)] === [2023-11-29 05:54:13,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:54:13,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1638286498, now seen corresponding path program 1 times [2023-11-29 05:54:13,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:54:13,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056840893] [2023-11-29 05:54:13,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:54:13,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:54:13,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:54:13,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:54:13,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:54:13,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056840893] [2023-11-29 05:54:13,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056840893] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:54:13,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:54:13,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:54:13,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67425433] [2023-11-29 05:54:13,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:54:13,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:54:13,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:54:13,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:54:13,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:54:13,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 85 [2023-11-29 05:54:13,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 93 transitions, 384 flow. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 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) [2023-11-29 05:54:13,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:54:13,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 85 [2023-11-29 05:54:13,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:54:18,891 INFO L124 PetriNetUnfolderBase]: 34221/47975 cut-off events. [2023-11-29 05:54:18,891 INFO L125 PetriNetUnfolderBase]: For 3400/3400 co-relation queries the response was YES. [2023-11-29 05:54:19,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104419 conditions, 47975 events. 34221/47975 cut-off events. For 3400/3400 co-relation queries the response was YES. Maximal size of possible extension queue 4330. Compared 371454 event pairs, 26914 based on Foata normal form. 507/26213 useless extension candidates. Maximal degree in co-relation 104404. Up to 40950 conditions per place. [2023-11-29 05:54:19,192 INFO L140 encePairwiseOnDemand]: 74/85 looper letters, 91 selfloop transitions, 8 changer transitions 3/122 dead transitions. [2023-11-29 05:54:19,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 122 transitions, 670 flow [2023-11-29 05:54:19,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:54:19,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 05:54:19,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 191 transitions. [2023-11-29 05:54:19,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5617647058823529 [2023-11-29 05:54:19,194 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 191 transitions. [2023-11-29 05:54:19,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 191 transitions. [2023-11-29 05:54:19,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:54:19,195 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 191 transitions. [2023-11-29 05:54:19,195 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 47.75) internal successors, (191), 4 states have internal predecessors, (191), 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) [2023-11-29 05:54:19,196 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 85.0) internal successors, (425), 5 states have internal predecessors, (425), 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) [2023-11-29 05:54:19,196 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 85.0) internal successors, (425), 5 states have internal predecessors, (425), 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) [2023-11-29 05:54:19,196 INFO L175 Difference]: Start difference. First operand has 90 places, 93 transitions, 384 flow. Second operand 4 states and 191 transitions. [2023-11-29 05:54:19,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 122 transitions, 670 flow [2023-11-29 05:54:19,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 122 transitions, 664 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 05:54:19,202 INFO L231 Difference]: Finished difference. Result has 93 places, 92 transitions, 402 flow [2023-11-29 05:54:19,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=378, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=402, PETRI_PLACES=93, PETRI_TRANSITIONS=92} [2023-11-29 05:54:19,203 INFO L281 CegarLoopForPetriNet]: 86 programPoint places, 7 predicate places. [2023-11-29 05:54:19,203 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 92 transitions, 402 flow [2023-11-29 05:54:19,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 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) [2023-11-29 05:54:19,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:54:19,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:54:19,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-29 05:54:19,203 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 57 more)] === [2023-11-29 05:54:19,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:54:19,204 INFO L85 PathProgramCache]: Analyzing trace with hash 517348730, now seen corresponding path program 1 times [2023-11-29 05:54:19,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:54:19,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521461977] [2023-11-29 05:54:19,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:54:19,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:54:19,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:54:19,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:54:19,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:54:19,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521461977] [2023-11-29 05:54:19,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521461977] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:54:19,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273965195] [2023-11-29 05:54:19,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:54:19,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:54:19,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460b51f7-df5a-4c35-92e7-82a29481d629/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:54:19,338 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460b51f7-df5a-4c35-92e7-82a29481d629/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:54:19,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460b51f7-df5a-4c35-92e7-82a29481d629/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 05:54:19,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:54:19,469 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 05:54:19,470 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:54:19,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:54:19,489 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:54:19,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273965195] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:54:19,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:54:19,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4] total 5 [2023-11-29 05:54:19,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361379695] [2023-11-29 05:54:19,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:54:19,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:54:19,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:54:19,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:54:19,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-29 05:54:19,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 85 [2023-11-29 05:54:19,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 92 transitions, 402 flow. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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) [2023-11-29 05:54:19,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:54:19,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 85 [2023-11-29 05:54:19,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:54:23,459 INFO L124 PetriNetUnfolderBase]: 25773/36265 cut-off events. [2023-11-29 05:54:23,459 INFO L125 PetriNetUnfolderBase]: For 5700/5700 co-relation queries the response was YES. [2023-11-29 05:54:23,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86136 conditions, 36265 events. 25773/36265 cut-off events. For 5700/5700 co-relation queries the response was YES. Maximal size of possible extension queue 3177. Compared 276350 event pairs, 20631 based on Foata normal form. 0/21152 useless extension candidates. Maximal degree in co-relation 86120. Up to 33333 conditions per place. [2023-11-29 05:54:23,705 INFO L140 encePairwiseOnDemand]: 82/85 looper letters, 69 selfloop transitions, 1 changer transitions 0/90 dead transitions. [2023-11-29 05:54:23,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 90 transitions, 534 flow [2023-11-29 05:54:23,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:54:23,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 05:54:23,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 125 transitions. [2023-11-29 05:54:23,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49019607843137253 [2023-11-29 05:54:23,707 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 125 transitions. [2023-11-29 05:54:23,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 125 transitions. [2023-11-29 05:54:23,707 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:54:23,707 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 125 transitions. [2023-11-29 05:54:23,708 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 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) [2023-11-29 05:54:23,708 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 85.0) internal successors, (340), 4 states have internal predecessors, (340), 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) [2023-11-29 05:54:23,708 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 85.0) internal successors, (340), 4 states have internal predecessors, (340), 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) [2023-11-29 05:54:23,708 INFO L175 Difference]: Start difference. First operand has 93 places, 92 transitions, 402 flow. Second operand 3 states and 125 transitions. [2023-11-29 05:54:23,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 90 transitions, 534 flow [2023-11-29 05:54:23,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 90 transitions, 527 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 05:54:23,718 INFO L231 Difference]: Finished difference. Result has 92 places, 90 transitions, 389 flow [2023-11-29 05:54:23,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=387, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=389, PETRI_PLACES=92, PETRI_TRANSITIONS=90} [2023-11-29 05:54:23,719 INFO L281 CegarLoopForPetriNet]: 86 programPoint places, 6 predicate places. [2023-11-29 05:54:23,719 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 90 transitions, 389 flow [2023-11-29 05:54:23,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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) [2023-11-29 05:54:23,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:54:23,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:54:23,725 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460b51f7-df5a-4c35-92e7-82a29481d629/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 05:54:23,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460b51f7-df5a-4c35-92e7-82a29481d629/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-29 05:54:23,921 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 57 more)] === [2023-11-29 05:54:23,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:54:23,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1142057389, now seen corresponding path program 1 times [2023-11-29 05:54:23,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:54:23,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210805757] [2023-11-29 05:54:23,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:54:23,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:54:23,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:54:23,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:54:23,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:54:23,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210805757] [2023-11-29 05:54:23,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210805757] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:54:23,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:54:23,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 05:54:23,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101801454] [2023-11-29 05:54:23,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:54:23,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:54:23,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:54:23,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:54:23,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:54:23,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 85 [2023-11-29 05:54:23,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 90 transitions, 389 flow. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 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) [2023-11-29 05:54:23,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:54:23,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 85 [2023-11-29 05:54:23,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:54:29,435 INFO L124 PetriNetUnfolderBase]: 34018/48204 cut-off events. [2023-11-29 05:54:29,435 INFO L125 PetriNetUnfolderBase]: For 7146/7146 co-relation queries the response was YES. [2023-11-29 05:54:29,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115059 conditions, 48204 events. 34018/48204 cut-off events. For 7146/7146 co-relation queries the response was YES. Maximal size of possible extension queue 3835. Compared 381176 event pairs, 11865 based on Foata normal form. 0/28883 useless extension candidates. Maximal degree in co-relation 115042. Up to 26162 conditions per place. [2023-11-29 05:54:29,787 INFO L140 encePairwiseOnDemand]: 81/85 looper letters, 103 selfloop transitions, 2 changer transitions 0/125 dead transitions. [2023-11-29 05:54:29,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 125 transitions, 704 flow [2023-11-29 05:54:29,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:54:29,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 05:54:29,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 160 transitions. [2023-11-29 05:54:29,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6274509803921569 [2023-11-29 05:54:29,788 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 160 transitions. [2023-11-29 05:54:29,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 160 transitions. [2023-11-29 05:54:29,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:54:29,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 160 transitions. [2023-11-29 05:54:29,789 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 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) [2023-11-29 05:54:29,790 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 85.0) internal successors, (340), 4 states have internal predecessors, (340), 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) [2023-11-29 05:54:29,790 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 85.0) internal successors, (340), 4 states have internal predecessors, (340), 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) [2023-11-29 05:54:29,790 INFO L175 Difference]: Start difference. First operand has 92 places, 90 transitions, 389 flow. Second operand 3 states and 160 transitions. [2023-11-29 05:54:29,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 125 transitions, 704 flow [2023-11-29 05:54:29,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 125 transitions, 703 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 05:54:29,800 INFO L231 Difference]: Finished difference. Result has 94 places, 91 transitions, 402 flow [2023-11-29 05:54:29,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=402, PETRI_PLACES=94, PETRI_TRANSITIONS=91} [2023-11-29 05:54:29,801 INFO L281 CegarLoopForPetriNet]: 86 programPoint places, 8 predicate places. [2023-11-29 05:54:29,801 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 91 transitions, 402 flow [2023-11-29 05:54:29,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 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) [2023-11-29 05:54:29,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:54:29,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:54:29,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-29 05:54:29,802 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 57 more)] === [2023-11-29 05:54:29,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:54:29,803 INFO L85 PathProgramCache]: Analyzing trace with hash 68764609, now seen corresponding path program 1 times [2023-11-29 05:54:29,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:54:29,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59104941] [2023-11-29 05:54:29,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:54:29,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:54:29,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:54:29,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:54:29,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:54:29,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59104941] [2023-11-29 05:54:29,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59104941] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:54:29,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861389447] [2023-11-29 05:54:29,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:54:29,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:54:29,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460b51f7-df5a-4c35-92e7-82a29481d629/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:54:29,982 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460b51f7-df5a-4c35-92e7-82a29481d629/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:54:29,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460b51f7-df5a-4c35-92e7-82a29481d629/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 05:54:30,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:54:30,127 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 05:54:30,129 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:54:30,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:54:30,161 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:54:30,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861389447] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:54:30,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:54:30,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-11-29 05:54:30,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393511573] [2023-11-29 05:54:30,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:54:30,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:54:30,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:54:30,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:54:30,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-29 05:54:30,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 85 [2023-11-29 05:54:30,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 91 transitions, 402 flow. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:54:30,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:54:30,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 85 [2023-11-29 05:54:30,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:54:34,372 INFO L124 PetriNetUnfolderBase]: 25475/36356 cut-off events. [2023-11-29 05:54:34,372 INFO L125 PetriNetUnfolderBase]: For 7610/7610 co-relation queries the response was YES. [2023-11-29 05:54:34,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89292 conditions, 36356 events. 25475/36356 cut-off events. For 7610/7610 co-relation queries the response was YES. Maximal size of possible extension queue 2766. Compared 286633 event pairs, 22131 based on Foata normal form. 0/22628 useless extension candidates. Maximal degree in co-relation 89273. Up to 33756 conditions per place. [2023-11-29 05:54:34,620 INFO L140 encePairwiseOnDemand]: 82/85 looper letters, 68 selfloop transitions, 1 changer transitions 0/89 dead transitions. [2023-11-29 05:54:34,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 89 transitions, 532 flow [2023-11-29 05:54:34,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:54:34,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 05:54:34,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 123 transitions. [2023-11-29 05:54:34,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4823529411764706 [2023-11-29 05:54:34,622 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 123 transitions. [2023-11-29 05:54:34,622 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 123 transitions. [2023-11-29 05:54:34,622 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:54:34,622 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 123 transitions. [2023-11-29 05:54:34,622 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 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) [2023-11-29 05:54:34,623 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 85.0) internal successors, (340), 4 states have internal predecessors, (340), 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) [2023-11-29 05:54:34,623 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 85.0) internal successors, (340), 4 states have internal predecessors, (340), 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) [2023-11-29 05:54:34,623 INFO L175 Difference]: Start difference. First operand has 94 places, 91 transitions, 402 flow. Second operand 3 states and 123 transitions. [2023-11-29 05:54:34,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 89 transitions, 532 flow [2023-11-29 05:54:34,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 89 transitions, 530 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 05:54:34,630 INFO L231 Difference]: Finished difference. Result has 93 places, 89 transitions, 394 flow [2023-11-29 05:54:34,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=392, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=394, PETRI_PLACES=93, PETRI_TRANSITIONS=89} [2023-11-29 05:54:34,631 INFO L281 CegarLoopForPetriNet]: 86 programPoint places, 7 predicate places. [2023-11-29 05:54:34,631 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 89 transitions, 394 flow [2023-11-29 05:54:34,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:54:34,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:54:34,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:54:34,636 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460b51f7-df5a-4c35-92e7-82a29481d629/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 05:54:34,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460b51f7-df5a-4c35-92e7-82a29481d629/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 05:54:34,832 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 57 more)] === [2023-11-29 05:54:34,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:54:34,832 INFO L85 PathProgramCache]: Analyzing trace with hash 2131704056, now seen corresponding path program 1 times [2023-11-29 05:54:34,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:54:34,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582724767] [2023-11-29 05:54:34,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:54:34,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:54:34,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:54:34,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:54:34,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:54:34,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582724767] [2023-11-29 05:54:34,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582724767] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:54:34,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:54:34,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 05:54:34,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806899540] [2023-11-29 05:54:34,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:54:34,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:54:34,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:54:34,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:54:34,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:54:34,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 85 [2023-11-29 05:54:34,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 89 transitions, 394 flow. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 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) [2023-11-29 05:54:34,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:54:34,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 85 [2023-11-29 05:54:34,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:54:40,190 INFO L124 PetriNetUnfolderBase]: 31934/46403 cut-off events. [2023-11-29 05:54:40,190 INFO L125 PetriNetUnfolderBase]: For 9281/9281 co-relation queries the response was YES. [2023-11-29 05:54:40,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112745 conditions, 46403 events. 31934/46403 cut-off events. For 9281/9281 co-relation queries the response was YES. Maximal size of possible extension queue 3248. Compared 385619 event pairs, 11601 based on Foata normal form. 0/30307 useless extension candidates. Maximal degree in co-relation 112725. Up to 26021 conditions per place. [2023-11-29 05:54:40,510 INFO L140 encePairwiseOnDemand]: 81/85 looper letters, 99 selfloop transitions, 2 changer transitions 0/121 dead transitions. [2023-11-29 05:54:40,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 121 transitions, 698 flow [2023-11-29 05:54:40,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:54:40,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 05:54:40,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 154 transitions. [2023-11-29 05:54:40,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6039215686274509 [2023-11-29 05:54:40,512 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 154 transitions. [2023-11-29 05:54:40,512 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 154 transitions. [2023-11-29 05:54:40,512 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:54:40,512 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 154 transitions. [2023-11-29 05:54:40,513 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 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) [2023-11-29 05:54:40,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 85.0) internal successors, (340), 4 states have internal predecessors, (340), 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) [2023-11-29 05:54:40,513 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 85.0) internal successors, (340), 4 states have internal predecessors, (340), 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) [2023-11-29 05:54:40,513 INFO L175 Difference]: Start difference. First operand has 93 places, 89 transitions, 394 flow. Second operand 3 states and 154 transitions. [2023-11-29 05:54:40,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 121 transitions, 698 flow [2023-11-29 05:54:40,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 121 transitions, 697 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 05:54:40,523 INFO L231 Difference]: Finished difference. Result has 95 places, 90 transitions, 407 flow [2023-11-29 05:54:40,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=393, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=407, PETRI_PLACES=95, PETRI_TRANSITIONS=90} [2023-11-29 05:54:40,523 INFO L281 CegarLoopForPetriNet]: 86 programPoint places, 9 predicate places. [2023-11-29 05:54:40,523 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 90 transitions, 407 flow [2023-11-29 05:54:40,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 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) [2023-11-29 05:54:40,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:54:40,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:54:40,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-29 05:54:40,524 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread3Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 57 more)] === [2023-11-29 05:54:40,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:54:40,524 INFO L85 PathProgramCache]: Analyzing trace with hash 977219365, now seen corresponding path program 1 times [2023-11-29 05:54:40,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:54:40,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541509746] [2023-11-29 05:54:40,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:54:40,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:54:40,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:54:40,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:54:40,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:54:40,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541509746] [2023-11-29 05:54:40,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541509746] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:54:40,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:54:40,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 05:54:40,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246005634] [2023-11-29 05:54:40,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:54:40,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:54:40,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:54:40,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:54:40,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:54:40,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 85 [2023-11-29 05:54:40,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 90 transitions, 407 flow. Second operand has 3 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) [2023-11-29 05:54:40,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:54:40,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 85 [2023-11-29 05:54:40,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:54:45,663 INFO L124 PetriNetUnfolderBase]: 31247/42433 cut-off events. [2023-11-29 05:54:45,663 INFO L125 PetriNetUnfolderBase]: For 9389/9389 co-relation queries the response was YES. [2023-11-29 05:54:45,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111069 conditions, 42433 events. 31247/42433 cut-off events. For 9389/9389 co-relation queries the response was YES. Maximal size of possible extension queue 2578. Compared 284227 event pairs, 7911 based on Foata normal form. 408/26041 useless extension candidates. Maximal degree in co-relation 111047. Up to 34489 conditions per place. [2023-11-29 05:54:45,962 INFO L140 encePairwiseOnDemand]: 78/85 looper letters, 96 selfloop transitions, 2 changer transitions 0/118 dead transitions. [2023-11-29 05:54:45,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 118 transitions, 689 flow [2023-11-29 05:54:45,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:54:45,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 05:54:45,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 153 transitions. [2023-11-29 05:54:45,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2023-11-29 05:54:45,963 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 153 transitions. [2023-11-29 05:54:45,963 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 153 transitions. [2023-11-29 05:54:45,964 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:54:45,964 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 153 transitions. [2023-11-29 05:54:45,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 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) [2023-11-29 05:54:45,964 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 85.0) internal successors, (340), 4 states have internal predecessors, (340), 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) [2023-11-29 05:54:45,965 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 85.0) internal successors, (340), 4 states have internal predecessors, (340), 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) [2023-11-29 05:54:45,965 INFO L175 Difference]: Start difference. First operand has 95 places, 90 transitions, 407 flow. Second operand 3 states and 153 transitions. [2023-11-29 05:54:45,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 118 transitions, 689 flow [2023-11-29 05:54:45,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 118 transitions, 686 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 05:54:45,971 INFO L231 Difference]: Finished difference. Result has 97 places, 91 transitions, 427 flow [2023-11-29 05:54:45,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=405, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=427, PETRI_PLACES=97, PETRI_TRANSITIONS=91} [2023-11-29 05:54:45,971 INFO L281 CegarLoopForPetriNet]: 86 programPoint places, 11 predicate places. [2023-11-29 05:54:45,972 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 91 transitions, 427 flow [2023-11-29 05:54:45,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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) [2023-11-29 05:54:45,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:54:45,972 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1] [2023-11-29 05:54:45,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-29 05:54:45,972 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 57 more)] === [2023-11-29 05:54:45,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:54:45,973 INFO L85 PathProgramCache]: Analyzing trace with hash -412929871, now seen corresponding path program 2 times [2023-11-29 05:54:45,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:54:45,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478009098] [2023-11-29 05:54:45,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:54:45,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:54:45,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:54:46,250 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:54:46,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:54:46,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478009098] [2023-11-29 05:54:46,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478009098] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:54:46,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115931140] [2023-11-29 05:54:46,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:54:46,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:54:46,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460b51f7-df5a-4c35-92e7-82a29481d629/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:54:46,252 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460b51f7-df5a-4c35-92e7-82a29481d629/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:54:46,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460b51f7-df5a-4c35-92e7-82a29481d629/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 05:54:46,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 05:54:46,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:54:46,364 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 05:54:46,366 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:54:46,413 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-29 05:54:46,413 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:54:46,447 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-29 05:54:46,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115931140] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:54:46,447 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:54:46,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 2, 2] total 12 [2023-11-29 05:54:46,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240898143] [2023-11-29 05:54:46,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:54:46,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 05:54:46,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:54:46,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 05:54:46,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-11-29 05:54:46,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 85 [2023-11-29 05:54:46,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 91 transitions, 427 flow. Second operand has 14 states, 14 states have (on average 23.142857142857142) internal successors, (324), 14 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:54:46,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:54:46,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 85 [2023-11-29 05:54:46,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:54:51,114 INFO L124 PetriNetUnfolderBase]: 25387/36330 cut-off events. [2023-11-29 05:54:51,114 INFO L125 PetriNetUnfolderBase]: For 13400/13400 co-relation queries the response was YES. [2023-11-29 05:54:51,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99682 conditions, 36330 events. 25387/36330 cut-off events. For 13400/13400 co-relation queries the response was YES. Maximal size of possible extension queue 2569. Compared 289047 event pairs, 23281 based on Foata normal form. 4/23155 useless extension candidates. Maximal degree in co-relation 99658. Up to 34199 conditions per place. [2023-11-29 05:54:51,379 INFO L140 encePairwiseOnDemand]: 76/85 looper letters, 43 selfloop transitions, 35 changer transitions 0/96 dead transitions. [2023-11-29 05:54:51,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 96 transitions, 613 flow [2023-11-29 05:54:51,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-29 05:54:51,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-29 05:54:51,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 605 transitions. [2023-11-29 05:54:51,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2965686274509804 [2023-11-29 05:54:51,382 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 605 transitions. [2023-11-29 05:54:51,382 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 605 transitions. [2023-11-29 05:54:51,383 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:54:51,383 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 605 transitions. [2023-11-29 05:54:51,384 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 25.208333333333332) internal successors, (605), 24 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:54:51,387 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 85.0) internal successors, (2125), 25 states have internal predecessors, (2125), 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) [2023-11-29 05:54:51,387 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 85.0) internal successors, (2125), 25 states have internal predecessors, (2125), 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) [2023-11-29 05:54:51,387 INFO L175 Difference]: Start difference. First operand has 97 places, 91 transitions, 427 flow. Second operand 24 states and 605 transitions. [2023-11-29 05:54:51,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 96 transitions, 613 flow [2023-11-29 05:54:51,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 96 transitions, 599 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-29 05:54:51,403 INFO L231 Difference]: Finished difference. Result has 120 places, 96 transitions, 526 flow [2023-11-29 05:54:51,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=403, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=526, PETRI_PLACES=120, PETRI_TRANSITIONS=96} [2023-11-29 05:54:51,404 INFO L281 CegarLoopForPetriNet]: 86 programPoint places, 34 predicate places. [2023-11-29 05:54:51,404 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 96 transitions, 526 flow [2023-11-29 05:54:51,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 23.142857142857142) internal successors, (324), 14 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:54:51,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:54:51,405 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:54:51,409 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460b51f7-df5a-4c35-92e7-82a29481d629/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 05:54:51,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460b51f7-df5a-4c35-92e7-82a29481d629/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:54:51,605 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 57 more)] === [2023-11-29 05:54:51,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:54:51,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1172818382, now seen corresponding path program 1 times [2023-11-29 05:54:51,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:54:51,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777470778] [2023-11-29 05:54:51,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:54:51,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:54:51,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:54:51,663 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:54:51,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:54:51,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777470778] [2023-11-29 05:54:51,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777470778] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:54:51,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372435343] [2023-11-29 05:54:51,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:54:51,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:54:51,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460b51f7-df5a-4c35-92e7-82a29481d629/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:54:51,665 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460b51f7-df5a-4c35-92e7-82a29481d629/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:54:51,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460b51f7-df5a-4c35-92e7-82a29481d629/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 05:54:51,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:54:51,807 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 05:54:51,808 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:54:51,886 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:54:51,886 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:54:52,193 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:54:52,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372435343] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:54:52,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:54:52,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 6, 6] total 12 [2023-11-29 05:54:52,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135509718] [2023-11-29 05:54:52,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:54:52,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 05:54:52,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:54:52,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 05:54:52,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-11-29 05:54:52,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 85 [2023-11-29 05:54:52,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 96 transitions, 526 flow. Second operand has 13 states, 13 states have (on average 24.076923076923077) internal successors, (313), 13 states have internal predecessors, (313), 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) [2023-11-29 05:54:52,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:54:52,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 85 [2023-11-29 05:54:52,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:55:03,311 INFO L124 PetriNetUnfolderBase]: 63344/88559 cut-off events. [2023-11-29 05:55:03,311 INFO L125 PetriNetUnfolderBase]: For 20315/20315 co-relation queries the response was YES. [2023-11-29 05:55:03,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 225498 conditions, 88559 events. 63344/88559 cut-off events. For 20315/20315 co-relation queries the response was YES. Maximal size of possible extension queue 4774. Compared 677519 event pairs, 10661 based on Foata normal form. 1004/57270 useless extension candidates. Maximal degree in co-relation 225471. Up to 25341 conditions per place. [2023-11-29 05:55:03,998 INFO L140 encePairwiseOnDemand]: 74/85 looper letters, 261 selfloop transitions, 35 changer transitions 0/314 dead transitions. [2023-11-29 05:55:03,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 314 transitions, 2026 flow [2023-11-29 05:55:03,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 05:55:03,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-29 05:55:04,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 573 transitions. [2023-11-29 05:55:04,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44941176470588234 [2023-11-29 05:55:04,001 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 573 transitions. [2023-11-29 05:55:04,001 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 573 transitions. [2023-11-29 05:55:04,001 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:55:04,001 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 573 transitions. [2023-11-29 05:55:04,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 38.2) internal successors, (573), 15 states have internal predecessors, (573), 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) [2023-11-29 05:55:04,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 85.0) internal successors, (1360), 16 states have internal predecessors, (1360), 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) [2023-11-29 05:55:04,005 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 85.0) internal successors, (1360), 16 states have internal predecessors, (1360), 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) [2023-11-29 05:55:04,005 INFO L175 Difference]: Start difference. First operand has 120 places, 96 transitions, 526 flow. Second operand 15 states and 573 transitions. [2023-11-29 05:55:04,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 314 transitions, 2026 flow [2023-11-29 05:55:04,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 314 transitions, 1859 flow, removed 18 selfloop flow, removed 12 redundant places. [2023-11-29 05:55:04,016 INFO L231 Difference]: Finished difference. Result has 129 places, 115 transitions, 708 flow [2023-11-29 05:55:04,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=423, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=708, PETRI_PLACES=129, PETRI_TRANSITIONS=115} [2023-11-29 05:55:04,016 INFO L281 CegarLoopForPetriNet]: 86 programPoint places, 43 predicate places. [2023-11-29 05:55:04,016 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 115 transitions, 708 flow [2023-11-29 05:55:04,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 24.076923076923077) internal successors, (313), 13 states have internal predecessors, (313), 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) [2023-11-29 05:55:04,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:55:04,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:55:04,022 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460b51f7-df5a-4c35-92e7-82a29481d629/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 05:55:04,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460b51f7-df5a-4c35-92e7-82a29481d629/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:55:04,217 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread4Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 57 more)] === [2023-11-29 05:55:04,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:55:04,218 INFO L85 PathProgramCache]: Analyzing trace with hash -876274931, now seen corresponding path program 1 times [2023-11-29 05:55:04,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:55:04,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940876669] [2023-11-29 05:55:04,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:55:04,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:55:04,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:55:04,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:55:04,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:55:04,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940876669] [2023-11-29 05:55:04,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940876669] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:55:04,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:55:04,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 05:55:04,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854413686] [2023-11-29 05:55:04,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:55:04,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:55:04,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:55:04,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:55:04,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:55:04,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 85 [2023-11-29 05:55:04,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 115 transitions, 708 flow. Second operand has 3 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) [2023-11-29 05:55:04,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:55:04,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 85 [2023-11-29 05:55:04,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:55:13,734 INFO L124 PetriNetUnfolderBase]: 52206/72729 cut-off events. [2023-11-29 05:55:13,734 INFO L125 PetriNetUnfolderBase]: For 42736/42736 co-relation queries the response was YES. [2023-11-29 05:55:14,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197590 conditions, 72729 events. 52206/72729 cut-off events. For 42736/42736 co-relation queries the response was YES. Maximal size of possible extension queue 3935. Compared 530204 event pairs, 12633 based on Foata normal form. 410/47605 useless extension candidates. Maximal degree in co-relation 197558. Up to 57829 conditions per place. [2023-11-29 05:55:14,383 INFO L140 encePairwiseOnDemand]: 78/85 looper letters, 123 selfloop transitions, 2 changer transitions 2/146 dead transitions. [2023-11-29 05:55:14,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 146 transitions, 1094 flow [2023-11-29 05:55:14,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:55:14,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 05:55:14,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 151 transitions. [2023-11-29 05:55:14,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.592156862745098 [2023-11-29 05:55:14,385 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 151 transitions. [2023-11-29 05:55:14,385 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 151 transitions. [2023-11-29 05:55:14,385 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:55:14,385 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 151 transitions. [2023-11-29 05:55:14,385 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 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) [2023-11-29 05:55:14,386 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 85.0) internal successors, (340), 4 states have internal predecessors, (340), 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) [2023-11-29 05:55:14,386 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 85.0) internal successors, (340), 4 states have internal predecessors, (340), 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) [2023-11-29 05:55:14,386 INFO L175 Difference]: Start difference. First operand has 129 places, 115 transitions, 708 flow. Second operand 3 states and 151 transitions. [2023-11-29 05:55:14,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 146 transitions, 1094 flow [2023-11-29 05:55:14,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 146 transitions, 1073 flow, removed 3 selfloop flow, removed 5 redundant places. [2023-11-29 05:55:14,409 INFO L231 Difference]: Finished difference. Result has 127 places, 116 transitions, 713 flow [2023-11-29 05:55:14,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=691, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=713, PETRI_PLACES=127, PETRI_TRANSITIONS=116} [2023-11-29 05:55:14,410 INFO L281 CegarLoopForPetriNet]: 86 programPoint places, 41 predicate places. [2023-11-29 05:55:14,410 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 116 transitions, 713 flow [2023-11-29 05:55:14,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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) [2023-11-29 05:55:14,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:55:14,411 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:55:14,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-29 05:55:14,411 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 57 more)] === [2023-11-29 05:55:14,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:55:14,411 INFO L85 PathProgramCache]: Analyzing trace with hash -2070823631, now seen corresponding path program 1 times [2023-11-29 05:55:14,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:55:14,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198763663] [2023-11-29 05:55:14,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:55:14,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:55:14,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:55:14,560 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:55:14,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:55:14,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198763663] [2023-11-29 05:55:14,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198763663] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:55:14,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633627538] [2023-11-29 05:55:14,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:55:14,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:55:14,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460b51f7-df5a-4c35-92e7-82a29481d629/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:55:14,564 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460b51f7-df5a-4c35-92e7-82a29481d629/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:55:14,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460b51f7-df5a-4c35-92e7-82a29481d629/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 05:55:14,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:55:14,699 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 05:55:14,700 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:55:14,775 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:55:14,775 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:55:14,871 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:55:14,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633627538] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:55:14,872 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:55:14,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-29 05:55:14,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285343726] [2023-11-29 05:55:14,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:55:14,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 05:55:14,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:55:14,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 05:55:14,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-11-29 05:55:14,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 85 [2023-11-29 05:55:14,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 116 transitions, 713 flow. Second operand has 15 states, 15 states have (on average 23.733333333333334) internal successors, (356), 15 states have internal predecessors, (356), 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) [2023-11-29 05:55:14,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:55:14,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 85 [2023-11-29 05:55:14,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:55:29,007 INFO L124 PetriNetUnfolderBase]: 68084/101169 cut-off events. [2023-11-29 05:55:29,007 INFO L125 PetriNetUnfolderBase]: For 63355/63355 co-relation queries the response was YES. [2023-11-29 05:55:29,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 288670 conditions, 101169 events. 68084/101169 cut-off events. For 63355/63355 co-relation queries the response was YES. Maximal size of possible extension queue 5644. Compared 897701 event pairs, 45174 based on Foata normal form. 1950/73212 useless extension candidates. Maximal degree in co-relation 288637. Up to 53534 conditions per place. [2023-11-29 05:55:29,971 INFO L140 encePairwiseOnDemand]: 78/85 looper letters, 150 selfloop transitions, 47 changer transitions 4/219 dead transitions. [2023-11-29 05:55:29,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 219 transitions, 1544 flow [2023-11-29 05:55:29,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 05:55:29,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-29 05:55:29,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 334 transitions. [2023-11-29 05:55:29,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4366013071895425 [2023-11-29 05:55:29,973 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 334 transitions. [2023-11-29 05:55:29,973 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 334 transitions. [2023-11-29 05:55:29,973 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:55:29,973 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 334 transitions. [2023-11-29 05:55:29,974 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 37.111111111111114) internal successors, (334), 9 states have internal predecessors, (334), 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) [2023-11-29 05:55:29,975 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 85.0) internal successors, (850), 10 states have internal predecessors, (850), 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) [2023-11-29 05:55:29,975 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 85.0) internal successors, (850), 10 states have internal predecessors, (850), 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) [2023-11-29 05:55:29,975 INFO L175 Difference]: Start difference. First operand has 127 places, 116 transitions, 713 flow. Second operand 9 states and 334 transitions. [2023-11-29 05:55:29,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 219 transitions, 1544 flow [2023-11-29 05:55:30,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 219 transitions, 1519 flow, removed 11 selfloop flow, removed 1 redundant places. [2023-11-29 05:55:30,039 INFO L231 Difference]: Finished difference. Result has 136 places, 117 transitions, 807 flow [2023-11-29 05:55:30,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=699, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=807, PETRI_PLACES=136, PETRI_TRANSITIONS=117} [2023-11-29 05:55:30,039 INFO L281 CegarLoopForPetriNet]: 86 programPoint places, 50 predicate places. [2023-11-29 05:55:30,039 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 117 transitions, 807 flow [2023-11-29 05:55:30,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 23.733333333333334) internal successors, (356), 15 states have internal predecessors, (356), 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) [2023-11-29 05:55:30,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:55:30,040 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:55:30,044 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460b51f7-df5a-4c35-92e7-82a29481d629/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 05:55:30,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460b51f7-df5a-4c35-92e7-82a29481d629/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 05:55:30,240 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 57 more)] === [2023-11-29 05:55:30,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:55:30,240 INFO L85 PathProgramCache]: Analyzing trace with hash 779407066, now seen corresponding path program 1 times [2023-11-29 05:55:30,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:55:30,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860694484] [2023-11-29 05:55:30,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:55:30,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:55:30,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:55:30,288 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 05:55:30,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:55:30,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860694484] [2023-11-29 05:55:30,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860694484] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:55:30,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:55:30,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 05:55:30,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647967198] [2023-11-29 05:55:30,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:55:30,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:55:30,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:55:30,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:55:30,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:55:30,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 85 [2023-11-29 05:55:30,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 117 transitions, 807 flow. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 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) [2023-11-29 05:55:30,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:55:30,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 85 [2023-11-29 05:55:30,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:55:42,369 INFO L124 PetriNetUnfolderBase]: 58197/88580 cut-off events. [2023-11-29 05:55:42,369 INFO L125 PetriNetUnfolderBase]: For 58524/58524 co-relation queries the response was YES. [2023-11-29 05:55:42,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 236503 conditions, 88580 events. 58197/88580 cut-off events. For 58524/58524 co-relation queries the response was YES. Maximal size of possible extension queue 5232. Compared 834256 event pairs, 54953 based on Foata normal form. 2592/65233 useless extension candidates. Maximal degree in co-relation 236468. Up to 80071 conditions per place. [2023-11-29 05:55:43,211 INFO L140 encePairwiseOnDemand]: 83/85 looper letters, 95 selfloop transitions, 1 changer transitions 0/115 dead transitions. [2023-11-29 05:55:43,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 115 transitions, 985 flow [2023-11-29 05:55:43,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:55:43,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 05:55:43,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 121 transitions. [2023-11-29 05:55:43,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4745098039215686 [2023-11-29 05:55:43,213 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 121 transitions. [2023-11-29 05:55:43,213 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 121 transitions. [2023-11-29 05:55:43,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:55:43,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 121 transitions. [2023-11-29 05:55:43,213 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 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) [2023-11-29 05:55:43,214 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 85.0) internal successors, (340), 4 states have internal predecessors, (340), 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) [2023-11-29 05:55:43,214 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 85.0) internal successors, (340), 4 states have internal predecessors, (340), 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) [2023-11-29 05:55:43,214 INFO L175 Difference]: Start difference. First operand has 136 places, 117 transitions, 807 flow. Second operand 3 states and 121 transitions. [2023-11-29 05:55:43,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 115 transitions, 985 flow [2023-11-29 05:55:43,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 115 transitions, 953 flow, removed 2 selfloop flow, removed 5 redundant places. [2023-11-29 05:55:43,491 INFO L231 Difference]: Finished difference. Result has 132 places, 115 transitions, 763 flow [2023-11-29 05:55:43,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=761, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=763, PETRI_PLACES=132, PETRI_TRANSITIONS=115} [2023-11-29 05:55:43,491 INFO L281 CegarLoopForPetriNet]: 86 programPoint places, 46 predicate places. [2023-11-29 05:55:43,491 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 115 transitions, 763 flow [2023-11-29 05:55:43,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 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) [2023-11-29 05:55:43,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:55:43,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:55:43,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-29 05:55:43,492 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread3Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 57 more)] === [2023-11-29 05:55:43,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:55:43,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1248418983, now seen corresponding path program 1 times [2023-11-29 05:55:43,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:55:43,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684110244] [2023-11-29 05:55:43,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:55:43,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:55:43,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:55:43,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:55:43,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:55:44,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684110244] [2023-11-29 05:55:44,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684110244] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:55:44,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325569259] [2023-11-29 05:55:44,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:55:44,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:55:44,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460b51f7-df5a-4c35-92e7-82a29481d629/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:55:44,001 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460b51f7-df5a-4c35-92e7-82a29481d629/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:55:44,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460b51f7-df5a-4c35-92e7-82a29481d629/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 05:55:44,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:55:44,163 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 05:55:44,166 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:55:44,223 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 05:55:44,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:55:44,586 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:55:44,944 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2023-11-29 05:55:44,952 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2023-11-29 05:55:44,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:55:44,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325569259] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:55:44,998 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:55:44,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2023-11-29 05:55:44,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297884774] [2023-11-29 05:55:44,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:55:44,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 05:55:44,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:55:45,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 05:55:45,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2023-11-29 05:55:45,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 85 [2023-11-29 05:55:45,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 115 transitions, 763 flow. Second operand has 17 states, 17 states have (on average 24.11764705882353) internal successors, (410), 17 states have internal predecessors, (410), 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) [2023-11-29 05:55:45,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:55:45,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 85 [2023-11-29 05:55:45,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:56:06,366 INFO L124 PetriNetUnfolderBase]: 95468/138482 cut-off events. [2023-11-29 05:56:06,366 INFO L125 PetriNetUnfolderBase]: For 64980/64980 co-relation queries the response was YES. [2023-11-29 05:56:07,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 363908 conditions, 138482 events. 95468/138482 cut-off events. For 64980/64980 co-relation queries the response was YES. Maximal size of possible extension queue 6875. Compared 1190519 event pairs, 49440 based on Foata normal form. 0/93991 useless extension candidates. Maximal degree in co-relation 363873. Up to 50159 conditions per place. [2023-11-29 05:56:07,798 INFO L140 encePairwiseOnDemand]: 72/85 looper letters, 248 selfloop transitions, 75 changer transitions 0/341 dead transitions. [2023-11-29 05:56:07,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 341 transitions, 2491 flow [2023-11-29 05:56:07,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 05:56:07,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-29 05:56:07,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 730 transitions. [2023-11-29 05:56:07,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39037433155080214 [2023-11-29 05:56:07,802 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 730 transitions. [2023-11-29 05:56:07,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 730 transitions. [2023-11-29 05:56:07,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:56:07,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 730 transitions. [2023-11-29 05:56:07,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 33.18181818181818) internal successors, (730), 22 states have internal predecessors, (730), 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) [2023-11-29 05:56:07,808 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 85.0) internal successors, (1955), 23 states have internal predecessors, (1955), 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) [2023-11-29 05:56:07,808 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 85.0) internal successors, (1955), 23 states have internal predecessors, (1955), 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) [2023-11-29 05:56:07,808 INFO L175 Difference]: Start difference. First operand has 132 places, 115 transitions, 763 flow. Second operand 22 states and 730 transitions. [2023-11-29 05:56:07,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 341 transitions, 2491 flow [2023-11-29 05:56:08,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 341 transitions, 2490 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 05:56:08,117 INFO L231 Difference]: Finished difference. Result has 162 places, 148 transitions, 1363 flow [2023-11-29 05:56:08,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=762, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1363, PETRI_PLACES=162, PETRI_TRANSITIONS=148} [2023-11-29 05:56:08,118 INFO L281 CegarLoopForPetriNet]: 86 programPoint places, 76 predicate places. [2023-11-29 05:56:08,118 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 148 transitions, 1363 flow [2023-11-29 05:56:08,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 24.11764705882353) internal successors, (410), 17 states have internal predecessors, (410), 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) [2023-11-29 05:56:08,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:56:08,119 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:56:08,124 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460b51f7-df5a-4c35-92e7-82a29481d629/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 05:56:08,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460b51f7-df5a-4c35-92e7-82a29481d629/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 05:56:08,319 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread3Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 57 more)] === [2023-11-29 05:56:08,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:56:08,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1718606424, now seen corresponding path program 1 times [2023-11-29 05:56:08,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:56:08,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817085672] [2023-11-29 05:56:08,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:56:08,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:56:08,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:09,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:56:09,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:56:09,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817085672] [2023-11-29 05:56:09,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817085672] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:56:09,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106433231] [2023-11-29 05:56:09,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:56:09,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:56:09,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460b51f7-df5a-4c35-92e7-82a29481d629/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:56:09,013 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460b51f7-df5a-4c35-92e7-82a29481d629/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:56:09,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460b51f7-df5a-4c35-92e7-82a29481d629/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 05:56:09,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:09,180 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 05:56:09,183 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:56:09,217 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 05:56:09,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:56:09,527 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:56:09,884 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-11-29 05:56:09,890 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2023-11-29 05:56:09,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:56:09,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106433231] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:56:09,933 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:56:09,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2023-11-29 05:56:09,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289790277] [2023-11-29 05:56:09,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:56:09,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 05:56:09,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:56:09,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 05:56:09,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2023-11-29 05:56:10,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 85 [2023-11-29 05:56:10,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 148 transitions, 1363 flow. Second operand has 17 states, 17 states have (on average 24.11764705882353) internal successors, (410), 17 states have internal predecessors, (410), 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) [2023-11-29 05:56:10,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:56:10,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 85 [2023-11-29 05:56:10,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:56:32,688 INFO L124 PetriNetUnfolderBase]: 90812/132350 cut-off events. [2023-11-29 05:56:32,688 INFO L125 PetriNetUnfolderBase]: For 177510/177510 co-relation queries the response was YES. [2023-11-29 05:56:33,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 408263 conditions, 132350 events. 90812/132350 cut-off events. For 177510/177510 co-relation queries the response was YES. Maximal size of possible extension queue 6389. Compared 1137530 event pairs, 47073 based on Foata normal form. 0/101718 useless extension candidates. Maximal degree in co-relation 408217. Up to 49467 conditions per place. [2023-11-29 05:56:34,258 INFO L140 encePairwiseOnDemand]: 72/85 looper letters, 246 selfloop transitions, 74 changer transitions 0/338 dead transitions. [2023-11-29 05:56:34,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 338 transitions, 2765 flow [2023-11-29 05:56:34,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 05:56:34,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-29 05:56:34,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 727 transitions. [2023-11-29 05:56:34,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38877005347593585 [2023-11-29 05:56:34,261 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 727 transitions. [2023-11-29 05:56:34,261 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 727 transitions. [2023-11-29 05:56:34,261 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:56:34,261 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 727 transitions. [2023-11-29 05:56:34,262 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 33.04545454545455) internal successors, (727), 22 states have internal predecessors, (727), 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) [2023-11-29 05:56:34,265 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 85.0) internal successors, (1955), 23 states have internal predecessors, (1955), 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) [2023-11-29 05:56:34,265 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 85.0) internal successors, (1955), 23 states have internal predecessors, (1955), 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) [2023-11-29 05:56:34,265 INFO L175 Difference]: Start difference. First operand has 162 places, 148 transitions, 1363 flow. Second operand 22 states and 727 transitions. [2023-11-29 05:56:34,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 338 transitions, 2765 flow [2023-11-29 05:56:35,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 338 transitions, 2672 flow, removed 21 selfloop flow, removed 9 redundant places. [2023-11-29 05:56:35,203 INFO L231 Difference]: Finished difference. Result has 174 places, 146 transitions, 1403 flow [2023-11-29 05:56:35,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=1255, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1403, PETRI_PLACES=174, PETRI_TRANSITIONS=146} [2023-11-29 05:56:35,203 INFO L281 CegarLoopForPetriNet]: 86 programPoint places, 88 predicate places. [2023-11-29 05:56:35,203 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 146 transitions, 1403 flow [2023-11-29 05:56:35,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 24.11764705882353) internal successors, (410), 17 states have internal predecessors, (410), 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) [2023-11-29 05:56:35,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:56:35,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:56:35,208 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460b51f7-df5a-4c35-92e7-82a29481d629/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 05:56:35,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460b51f7-df5a-4c35-92e7-82a29481d629/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:56:35,404 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread3Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 57 more)] === [2023-11-29 05:56:35,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:56:35,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1718606426, now seen corresponding path program 1 times [2023-11-29 05:56:35,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:56:35,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543459063] [2023-11-29 05:56:35,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:56:35,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:56:35,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:35,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:56:35,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:56:35,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543459063] [2023-11-29 05:56:35,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543459063] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:56:35,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:56:35,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 05:56:35,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177026950] [2023-11-29 05:56:35,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:56:35,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:56:35,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:56:35,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:56:35,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:56:35,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 85 [2023-11-29 05:56:35,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 146 transitions, 1403 flow. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 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) [2023-11-29 05:56:35,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:56:35,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 85 [2023-11-29 05:56:35,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:57:00,429 INFO L124 PetriNetUnfolderBase]: 115376/163463 cut-off events. [2023-11-29 05:57:00,429 INFO L125 PetriNetUnfolderBase]: For 294032/294032 co-relation queries the response was YES. [2023-11-29 05:57:01,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 509276 conditions, 163463 events. 115376/163463 cut-off events. For 294032/294032 co-relation queries the response was YES. Maximal size of possible extension queue 7167. Compared 1318940 event pairs, 31255 based on Foata normal form. 2866/130678 useless extension candidates. Maximal degree in co-relation 509230. Up to 107817 conditions per place. [2023-11-29 05:57:02,314 INFO L140 encePairwiseOnDemand]: 78/85 looper letters, 159 selfloop transitions, 5 changer transitions 0/183 dead transitions. [2023-11-29 05:57:02,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 183 transitions, 1927 flow [2023-11-29 05:57:02,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:57:02,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 05:57:02,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 150 transitions. [2023-11-29 05:57:02,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5882352941176471 [2023-11-29 05:57:02,316 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 150 transitions. [2023-11-29 05:57:02,316 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 150 transitions. [2023-11-29 05:57:02,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:57:02,316 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 150 transitions. [2023-11-29 05:57:02,316 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 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) [2023-11-29 05:57:02,317 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 85.0) internal successors, (340), 4 states have internal predecessors, (340), 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) [2023-11-29 05:57:02,317 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 85.0) internal successors, (340), 4 states have internal predecessors, (340), 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) [2023-11-29 05:57:02,317 INFO L175 Difference]: Start difference. First operand has 174 places, 146 transitions, 1403 flow. Second operand 3 states and 150 transitions. [2023-11-29 05:57:02,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 183 transitions, 1927 flow [2023-11-29 05:57:05,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 183 transitions, 1810 flow, removed 2 selfloop flow, removed 18 redundant places. [2023-11-29 05:57:05,751 INFO L231 Difference]: Finished difference. Result has 159 places, 150 transitions, 1358 flow [2023-11-29 05:57:05,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=1293, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1358, PETRI_PLACES=159, PETRI_TRANSITIONS=150} [2023-11-29 05:57:05,751 INFO L281 CegarLoopForPetriNet]: 86 programPoint places, 73 predicate places. [2023-11-29 05:57:05,751 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 150 transitions, 1358 flow [2023-11-29 05:57:05,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 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) [2023-11-29 05:57:05,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:57:05,751 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 1, 1, 1] [2023-11-29 05:57:05,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-29 05:57:05,752 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 57 more)] === [2023-11-29 05:57:05,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:57:05,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1578363554, now seen corresponding path program 1 times [2023-11-29 05:57:05,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:57:05,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667422844] [2023-11-29 05:57:05,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:57:05,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:57:05,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:57:05,886 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:57:05,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:57:05,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667422844] [2023-11-29 05:57:05,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667422844] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:57:05,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061260972] [2023-11-29 05:57:05,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:57:05,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:57:05,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460b51f7-df5a-4c35-92e7-82a29481d629/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:57:05,887 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460b51f7-df5a-4c35-92e7-82a29481d629/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:57:05,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460b51f7-df5a-4c35-92e7-82a29481d629/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 05:57:06,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:57:06,026 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 05:57:06,027 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:57:06,061 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:57:06,061 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:57:06,191 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:57:06,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061260972] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:57:06,191 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:57:06,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 27 [2023-11-29 05:57:06,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032920769] [2023-11-29 05:57:06,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:57:06,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-29 05:57:06,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:57:06,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-29 05:57:06,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756 [2023-11-29 05:57:06,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 85 [2023-11-29 05:57:06,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 150 transitions, 1358 flow. Second operand has 28 states, 28 states have (on average 23.071428571428573) internal successors, (646), 28 states have internal predecessors, (646), 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) [2023-11-29 05:57:06,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:57:06,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 85 [2023-11-29 05:57:06,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand