./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-counter-determinism.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_5211747a-c4c6-4a61-b8fc-9a36bae13927/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5211747a-c4c6-4a61-b8fc-9a36bae13927/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_5211747a-c4c6-4a61-b8fc-9a36bae13927/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5211747a-c4c6-4a61-b8fc-9a36bae13927/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-counter-determinism.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5211747a-c4c6-4a61-b8fc-9a36bae13927/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_5211747a-c4c6-4a61-b8fc-9a36bae13927/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 1dad5daa490be7069cef5ea8bf1cf3314a40a44a4796167c86226f70cfcf68a2 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-28 20:35:14,074 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-28 20:35:14,170 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5211747a-c4c6-4a61-b8fc-9a36bae13927/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-11-28 20:35:14,175 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-28 20:35:14,176 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-28 20:35:14,202 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-28 20:35:14,203 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-28 20:35:14,204 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-28 20:35:14,205 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-28 20:35:14,205 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-28 20:35:14,206 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-28 20:35:14,206 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-28 20:35:14,207 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-28 20:35:14,208 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-28 20:35:14,208 INFO L153 SettingsManager]: * Use SBE=true [2023-11-28 20:35:14,209 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-28 20:35:14,209 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-28 20:35:14,210 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-28 20:35:14,210 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-28 20:35:14,211 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-28 20:35:14,211 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-28 20:35:14,212 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-28 20:35:14,213 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-28 20:35:14,213 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-28 20:35:14,213 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-28 20:35:14,214 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-28 20:35:14,214 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-28 20:35:14,215 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-28 20:35:14,215 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-28 20:35:14,216 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-28 20:35:14,216 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-28 20:35:14,216 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-28 20:35:14,217 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-28 20:35:14,217 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 20:35:14,217 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-28 20:35:14,218 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-28 20:35:14,218 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-28 20:35:14,218 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-28 20:35:14,218 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-28 20:35:14,218 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-28 20:35:14,219 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-28 20:35:14,219 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-28 20:35:14,219 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-28 20:35:14,219 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-28 20:35:14,220 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_5211747a-c4c6-4a61-b8fc-9a36bae13927/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5211747a-c4c6-4a61-b8fc-9a36bae13927/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1dad5daa490be7069cef5ea8bf1cf3314a40a44a4796167c86226f70cfcf68a2 [2023-11-28 20:35:14,450 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-28 20:35:14,470 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-28 20:35:14,473 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-28 20:35:14,474 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-28 20:35:14,474 INFO L274 PluginConnector]: CDTParser initialized [2023-11-28 20:35:14,475 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5211747a-c4c6-4a61-b8fc-9a36bae13927/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/popl20-counter-determinism.wvr.c [2023-11-28 20:35:17,258 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-28 20:35:17,443 INFO L384 CDTParser]: Found 1 translation units. [2023-11-28 20:35:17,444 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5211747a-c4c6-4a61-b8fc-9a36bae13927/sv-benchmarks/c/weaver/popl20-counter-determinism.wvr.c [2023-11-28 20:35:17,451 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5211747a-c4c6-4a61-b8fc-9a36bae13927/bin/uautomizer-verify-BQ2R08f2Ya/data/a860cca82/393cb7a28bd2410a9f5da265573578e2/FLAGc43b030ae [2023-11-28 20:35:17,465 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5211747a-c4c6-4a61-b8fc-9a36bae13927/bin/uautomizer-verify-BQ2R08f2Ya/data/a860cca82/393cb7a28bd2410a9f5da265573578e2 [2023-11-28 20:35:17,467 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-28 20:35:17,468 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-28 20:35:17,470 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-28 20:35:17,470 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-28 20:35:17,474 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-28 20:35:17,475 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:35:17" (1/1) ... [2023-11-28 20:35:17,476 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35521979 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:35:17, skipping insertion in model container [2023-11-28 20:35:17,476 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:35:17" (1/1) ... [2023-11-28 20:35:17,497 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-28 20:35:17,641 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 20:35:17,650 INFO L202 MainTranslator]: Completed pre-run [2023-11-28 20:35:17,675 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 20:35:17,683 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-28 20:35:17,683 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-28 20:35:17,689 INFO L206 MainTranslator]: Completed translation [2023-11-28 20:35:17,689 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:35:17 WrapperNode [2023-11-28 20:35:17,689 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-28 20:35:17,690 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-28 20:35:17,690 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-28 20:35:17,691 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-28 20:35:17,696 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:35:17" (1/1) ... [2023-11-28 20:35:17,704 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:35:17" (1/1) ... [2023-11-28 20:35:17,730 INFO L138 Inliner]: procedures = 23, calls = 42, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 130 [2023-11-28 20:35:17,730 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-28 20:35:17,731 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-28 20:35:17,731 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-28 20:35:17,732 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-28 20:35:17,741 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:35:17" (1/1) ... [2023-11-28 20:35:17,741 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:35:17" (1/1) ... [2023-11-28 20:35:17,744 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:35:17" (1/1) ... [2023-11-28 20:35:17,760 INFO L175 MemorySlicer]: Split 10 memory accesses to 5 slices as follows [2, 2, 2, 2, 2]. 20 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 4 writes are split as follows [0, 1, 1, 1, 1]. [2023-11-28 20:35:17,761 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:35:17" (1/1) ... [2023-11-28 20:35:17,761 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:35:17" (1/1) ... [2023-11-28 20:35:17,769 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:35:17" (1/1) ... [2023-11-28 20:35:17,773 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:35:17" (1/1) ... [2023-11-28 20:35:17,775 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:35:17" (1/1) ... [2023-11-28 20:35:17,776 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:35:17" (1/1) ... [2023-11-28 20:35:17,780 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-28 20:35:17,781 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-28 20:35:17,781 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-28 20:35:17,781 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-28 20:35:17,782 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:35:17" (1/1) ... [2023-11-28 20:35:17,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 20:35:17,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5211747a-c4c6-4a61-b8fc-9a36bae13927/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:35:17,806 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5211747a-c4c6-4a61-b8fc-9a36bae13927/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-28 20:35:17,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5211747a-c4c6-4a61-b8fc-9a36bae13927/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-28 20:35:17,854 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-28 20:35:17,854 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-28 20:35:17,854 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-28 20:35:17,854 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-28 20:35:17,855 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-28 20:35:17,855 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-28 20:35:17,855 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-28 20:35:17,855 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-11-28 20:35:17,855 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-11-28 20:35:17,855 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-28 20:35:17,855 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-28 20:35:17,856 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-28 20:35:17,856 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-28 20:35:17,856 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-28 20:35:17,856 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-28 20:35:17,856 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-28 20:35:17,856 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-28 20:35:17,857 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-28 20:35:17,857 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-28 20:35:17,857 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-28 20:35:17,857 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-28 20:35:17,857 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-28 20:35:17,857 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-28 20:35:17,858 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-28 20:35:17,858 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-28 20:35:17,858 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-28 20:35:17,858 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-28 20:35:17,858 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-28 20:35:17,858 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-28 20:35:17,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-28 20:35:17,860 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-28 20:35:17,984 INFO L241 CfgBuilder]: Building ICFG [2023-11-28 20:35:17,986 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-28 20:35:18,238 INFO L282 CfgBuilder]: Performing block encoding [2023-11-28 20:35:18,438 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-28 20:35:18,439 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-28 20:35:18,439 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:35:18 BoogieIcfgContainer [2023-11-28 20:35:18,439 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-28 20:35:18,443 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-28 20:35:18,443 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-28 20:35:18,446 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-28 20:35:18,447 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 08:35:17" (1/3) ... [2023-11-28 20:35:18,447 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@227a2ff2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:35:18, skipping insertion in model container [2023-11-28 20:35:18,448 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:35:17" (2/3) ... [2023-11-28 20:35:18,448 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@227a2ff2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:35:18, skipping insertion in model container [2023-11-28 20:35:18,448 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:35:18" (3/3) ... [2023-11-28 20:35:18,449 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-counter-determinism.wvr.c [2023-11-28 20:35:18,458 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-28 20:35:18,469 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-28 20:35:18,469 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2023-11-28 20:35:18,470 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-28 20:35:18,541 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-28 20:35:18,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 74 places, 65 transitions, 158 flow [2023-11-28 20:35:18,607 INFO L124 PetriNetUnfolderBase]: 4/61 cut-off events. [2023-11-28 20:35:18,607 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-28 20:35:18,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78 conditions, 61 events. 4/61 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 167 event pairs, 0 based on Foata normal form. 0/41 useless extension candidates. Maximal degree in co-relation 57. Up to 2 conditions per place. [2023-11-28 20:35:18,612 INFO L82 GeneralOperation]: Start removeDead. Operand has 74 places, 65 transitions, 158 flow [2023-11-28 20:35:18,616 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 68 places, 59 transitions, 139 flow [2023-11-28 20:35:18,628 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-28 20:35:18,634 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;@13bc23d7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-28 20:35:18,634 INFO L358 AbstractCegarLoop]: Starting to check reachability of 36 error locations. [2023-11-28 20:35:18,640 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-28 20:35:18,640 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2023-11-28 20:35:18,640 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-28 20:35:18,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:35:18,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-28 20:35:18,641 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-28 20:35:18,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:35:18,646 INFO L85 PathProgramCache]: Analyzing trace with hash 402544949, now seen corresponding path program 1 times [2023-11-28 20:35:18,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:35:18,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084167457] [2023-11-28 20:35:18,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:35:18,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:35:18,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:35:18,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:35:18,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:35:18,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084167457] [2023-11-28 20:35:18,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084167457] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:35:18,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:35:18,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-28 20:35:18,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443798112] [2023-11-28 20:35:18,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:35:18,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:35:18,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:35:18,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:35:18,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:35:18,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 65 [2023-11-28 20:35:18,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 59 transitions, 139 flow. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:18,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:35:18,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 65 [2023-11-28 20:35:18,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:35:20,488 INFO L124 PetriNetUnfolderBase]: 9935/15711 cut-off events. [2023-11-28 20:35:20,489 INFO L125 PetriNetUnfolderBase]: For 539/539 co-relation queries the response was YES. [2023-11-28 20:35:20,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29609 conditions, 15711 events. 9935/15711 cut-off events. For 539/539 co-relation queries the response was YES. Maximal size of possible extension queue 821. Compared 113864 event pairs, 2827 based on Foata normal form. 279/12427 useless extension candidates. Maximal degree in co-relation 24767. Up to 9745 conditions per place. [2023-11-28 20:35:20,623 INFO L140 encePairwiseOnDemand]: 57/65 looper letters, 63 selfloop transitions, 2 changer transitions 0/85 dead transitions. [2023-11-28 20:35:20,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 85 transitions, 339 flow [2023-11-28 20:35:20,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:35:20,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-28 20:35:20,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 145 transitions. [2023-11-28 20:35:20,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7435897435897436 [2023-11-28 20:35:20,634 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 145 transitions. [2023-11-28 20:35:20,635 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 145 transitions. [2023-11-28 20:35:20,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:35:20,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 145 transitions. [2023-11-28 20:35:20,640 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:20,644 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 65.0) internal successors, (260), 4 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:20,644 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 65.0) internal successors, (260), 4 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:20,646 INFO L175 Difference]: Start difference. First operand has 68 places, 59 transitions, 139 flow. Second operand 3 states and 145 transitions. [2023-11-28 20:35:20,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 85 transitions, 339 flow [2023-11-28 20:35:20,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 85 transitions, 315 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-11-28 20:35:20,677 INFO L231 Difference]: Finished difference. Result has 62 places, 58 transitions, 140 flow [2023-11-28 20:35:20,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=65, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=62, PETRI_TRANSITIONS=58} [2023-11-28 20:35:20,682 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -6 predicate places. [2023-11-28 20:35:20,682 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 58 transitions, 140 flow [2023-11-28 20:35:20,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:20,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:35:20,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:35:20,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-28 20:35:20,683 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-28 20:35:20,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:35:20,684 INFO L85 PathProgramCache]: Analyzing trace with hash 298655192, now seen corresponding path program 1 times [2023-11-28 20:35:20,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:35:20,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597452752] [2023-11-28 20:35:20,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:35:20,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:35:20,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:35:20,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:35:20,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:35:20,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597452752] [2023-11-28 20:35:20,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597452752] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:35:20,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:35:20,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 20:35:20,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592215876] [2023-11-28 20:35:20,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:35:20,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 20:35:20,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:35:20,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 20:35:20,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-28 20:35:20,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 65 [2023-11-28 20:35:20,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 58 transitions, 140 flow. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 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) [2023-11-28 20:35:20,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:35:20,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 65 [2023-11-28 20:35:20,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:35:22,745 INFO L124 PetriNetUnfolderBase]: 16195/23156 cut-off events. [2023-11-28 20:35:22,746 INFO L125 PetriNetUnfolderBase]: For 1373/1373 co-relation queries the response was YES. [2023-11-28 20:35:22,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48314 conditions, 23156 events. 16195/23156 cut-off events. For 1373/1373 co-relation queries the response was YES. Maximal size of possible extension queue 1128. Compared 152003 event pairs, 6713 based on Foata normal form. 372/18659 useless extension candidates. Maximal degree in co-relation 8631. Up to 17207 conditions per place. [2023-11-28 20:35:22,903 INFO L140 encePairwiseOnDemand]: 59/65 looper letters, 86 selfloop transitions, 4 changer transitions 0/107 dead transitions. [2023-11-28 20:35:22,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 107 transitions, 434 flow [2023-11-28 20:35:22,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 20:35:22,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-28 20:35:22,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 176 transitions. [2023-11-28 20:35:22,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.676923076923077 [2023-11-28 20:35:22,907 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 176 transitions. [2023-11-28 20:35:22,907 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 176 transitions. [2023-11-28 20:35:22,908 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:35:22,908 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 176 transitions. [2023-11-28 20:35:22,910 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 44.0) internal successors, (176), 4 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:22,912 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 65.0) internal successors, (325), 5 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:22,912 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 65.0) internal successors, (325), 5 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:22,913 INFO L175 Difference]: Start difference. First operand has 62 places, 58 transitions, 140 flow. Second operand 4 states and 176 transitions. [2023-11-28 20:35:22,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 107 transitions, 434 flow [2023-11-28 20:35:22,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 107 transitions, 432 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-28 20:35:22,917 INFO L231 Difference]: Finished difference. Result has 66 places, 61 transitions, 167 flow [2023-11-28 20:35:22,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=65, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=167, PETRI_PLACES=66, PETRI_TRANSITIONS=61} [2023-11-28 20:35:22,918 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -2 predicate places. [2023-11-28 20:35:22,918 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 61 transitions, 167 flow [2023-11-28 20:35:22,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 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) [2023-11-28 20:35:22,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:35:22,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:35:22,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-28 20:35:22,919 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-28 20:35:22,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:35:22,920 INFO L85 PathProgramCache]: Analyzing trace with hash -404828070, now seen corresponding path program 1 times [2023-11-28 20:35:22,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:35:22,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344797595] [2023-11-28 20:35:22,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:35:22,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:35:22,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:35:23,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:35:23,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:35:23,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344797595] [2023-11-28 20:35:23,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344797595] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:35:23,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:35:23,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-28 20:35:23,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606843030] [2023-11-28 20:35:23,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:35:23,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:35:23,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:35:23,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:35:23,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:35:23,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 65 [2023-11-28 20:35:23,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 61 transitions, 167 flow. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:23,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:35:23,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 65 [2023-11-28 20:35:23,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:35:24,766 INFO L124 PetriNetUnfolderBase]: 12641/20334 cut-off events. [2023-11-28 20:35:24,766 INFO L125 PetriNetUnfolderBase]: For 3880/5158 co-relation queries the response was YES. [2023-11-28 20:35:24,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42982 conditions, 20334 events. 12641/20334 cut-off events. For 3880/5158 co-relation queries the response was YES. Maximal size of possible extension queue 833. Compared 149875 event pairs, 3570 based on Foata normal form. 608/16936 useless extension candidates. Maximal degree in co-relation 27497. Up to 12418 conditions per place. [2023-11-28 20:35:24,916 INFO L140 encePairwiseOnDemand]: 59/65 looper letters, 63 selfloop transitions, 2 changer transitions 2/88 dead transitions. [2023-11-28 20:35:24,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 88 transitions, 385 flow [2023-11-28 20:35:24,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:35:24,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-28 20:35:24,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 137 transitions. [2023-11-28 20:35:24,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7025641025641025 [2023-11-28 20:35:24,918 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 137 transitions. [2023-11-28 20:35:24,918 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 137 transitions. [2023-11-28 20:35:24,919 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:35:24,919 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 137 transitions. [2023-11-28 20:35:24,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 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) [2023-11-28 20:35:24,921 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 65.0) internal successors, (260), 4 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:24,921 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 65.0) internal successors, (260), 4 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:24,921 INFO L175 Difference]: Start difference. First operand has 66 places, 61 transitions, 167 flow. Second operand 3 states and 137 transitions. [2023-11-28 20:35:24,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 88 transitions, 385 flow [2023-11-28 20:35:24,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 88 transitions, 379 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-28 20:35:24,925 INFO L231 Difference]: Finished difference. Result has 68 places, 62 transitions, 182 flow [2023-11-28 20:35:24,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=65, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=182, PETRI_PLACES=68, PETRI_TRANSITIONS=62} [2023-11-28 20:35:24,927 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 0 predicate places. [2023-11-28 20:35:24,927 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 62 transitions, 182 flow [2023-11-28 20:35:24,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:24,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:35:24,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:35:24,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-28 20:35:24,928 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-28 20:35:24,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:35:24,929 INFO L85 PathProgramCache]: Analyzing trace with hash -384630272, now seen corresponding path program 1 times [2023-11-28 20:35:24,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:35:24,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936082442] [2023-11-28 20:35:24,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:35:24,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:35:24,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:35:25,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:35:25,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:35:25,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936082442] [2023-11-28 20:35:25,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936082442] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:35:25,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:35:25,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-28 20:35:25,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980940298] [2023-11-28 20:35:25,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:35:25,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 20:35:25,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:35:25,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 20:35:25,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-28 20:35:25,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 65 [2023-11-28 20:35:25,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 62 transitions, 182 flow. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:25,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:35:25,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 65 [2023-11-28 20:35:25,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:35:27,492 INFO L124 PetriNetUnfolderBase]: 20639/32855 cut-off events. [2023-11-28 20:35:27,492 INFO L125 PetriNetUnfolderBase]: For 7171/7771 co-relation queries the response was YES. [2023-11-28 20:35:27,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76037 conditions, 32855 events. 20639/32855 cut-off events. For 7171/7771 co-relation queries the response was YES. Maximal size of possible extension queue 1222. Compared 257514 event pairs, 6315 based on Foata normal form. 754/28194 useless extension candidates. Maximal degree in co-relation 18760. Up to 9844 conditions per place. [2023-11-28 20:35:27,752 INFO L140 encePairwiseOnDemand]: 59/65 looper letters, 100 selfloop transitions, 6 changer transitions 0/127 dead transitions. [2023-11-28 20:35:27,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 127 transitions, 582 flow [2023-11-28 20:35:27,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 20:35:27,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-28 20:35:27,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 201 transitions. [2023-11-28 20:35:27,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7730769230769231 [2023-11-28 20:35:27,754 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 201 transitions. [2023-11-28 20:35:27,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 201 transitions. [2023-11-28 20:35:27,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:35:27,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 201 transitions. [2023-11-28 20:35:27,757 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 50.25) internal successors, (201), 4 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:27,758 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 65.0) internal successors, (325), 5 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:27,759 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 65.0) internal successors, (325), 5 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:27,759 INFO L175 Difference]: Start difference. First operand has 68 places, 62 transitions, 182 flow. Second operand 4 states and 201 transitions. [2023-11-28 20:35:27,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 127 transitions, 582 flow [2023-11-28 20:35:27,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 127 transitions, 578 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-28 20:35:27,773 INFO L231 Difference]: Finished difference. Result has 73 places, 66 transitions, 238 flow [2023-11-28 20:35:27,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=65, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=238, PETRI_PLACES=73, PETRI_TRANSITIONS=66} [2023-11-28 20:35:27,774 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 5 predicate places. [2023-11-28 20:35:27,774 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 66 transitions, 238 flow [2023-11-28 20:35:27,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:27,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:35:27,775 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:35:27,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-28 20:35:27,776 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-28 20:35:27,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:35:27,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1934947008, now seen corresponding path program 1 times [2023-11-28 20:35:27,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:35:27,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540548140] [2023-11-28 20:35:27,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:35:27,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:35:27,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:35:27,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:35:27,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:35:27,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540548140] [2023-11-28 20:35:27,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540548140] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:35:27,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077072967] [2023-11-28 20:35:27,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:35:27,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:35:27,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5211747a-c4c6-4a61-b8fc-9a36bae13927/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:35:27,845 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5211747a-c4c6-4a61-b8fc-9a36bae13927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:35:27,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5211747a-c4c6-4a61-b8fc-9a36bae13927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-28 20:35:27,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:35:27,946 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-28 20:35:27,951 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:35:28,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:35:28,012 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:35:28,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077072967] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:35:28,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-28 20:35:28,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 3 [2023-11-28 20:35:28,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528060810] [2023-11-28 20:35:28,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:35:28,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 20:35:28,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:35:28,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 20:35:28,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-28 20:35:28,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 65 [2023-11-28 20:35:28,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 66 transitions, 238 flow. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:28,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:35:28,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 65 [2023-11-28 20:35:28,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:35:31,192 INFO L124 PetriNetUnfolderBase]: 23007/35587 cut-off events. [2023-11-28 20:35:31,193 INFO L125 PetriNetUnfolderBase]: For 27659/28770 co-relation queries the response was YES. [2023-11-28 20:35:31,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90872 conditions, 35587 events. 23007/35587 cut-off events. For 27659/28770 co-relation queries the response was YES. Maximal size of possible extension queue 1216. Compared 268930 event pairs, 8161 based on Foata normal form. 1292/32224 useless extension candidates. Maximal degree in co-relation 43269. Up to 16080 conditions per place. [2023-11-28 20:35:31,401 INFO L140 encePairwiseOnDemand]: 59/65 looper letters, 70 selfloop transitions, 8 changer transitions 0/99 dead transitions. [2023-11-28 20:35:31,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 99 transitions, 495 flow [2023-11-28 20:35:31,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 20:35:31,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-28 20:35:31,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 167 transitions. [2023-11-28 20:35:31,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6423076923076924 [2023-11-28 20:35:31,402 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 167 transitions. [2023-11-28 20:35:31,403 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 167 transitions. [2023-11-28 20:35:31,403 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:35:31,403 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 167 transitions. [2023-11-28 20:35:31,404 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:31,404 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 65.0) internal successors, (325), 5 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:31,405 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 65.0) internal successors, (325), 5 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:31,405 INFO L175 Difference]: Start difference. First operand has 73 places, 66 transitions, 238 flow. Second operand 4 states and 167 transitions. [2023-11-28 20:35:31,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 99 transitions, 495 flow [2023-11-28 20:35:31,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 99 transitions, 489 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-28 20:35:31,489 INFO L231 Difference]: Finished difference. Result has 76 places, 68 transitions, 285 flow [2023-11-28 20:35:31,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=65, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=285, PETRI_PLACES=76, PETRI_TRANSITIONS=68} [2023-11-28 20:35:31,490 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 8 predicate places. [2023-11-28 20:35:31,490 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 68 transitions, 285 flow [2023-11-28 20:35:31,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:31,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:35:31,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:35:31,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5211747a-c4c6-4a61-b8fc-9a36bae13927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-28 20:35:31,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5211747a-c4c6-4a61-b8fc-9a36bae13927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:35:31,696 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread3Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-28 20:35:31,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:35:31,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1802265213, now seen corresponding path program 1 times [2023-11-28 20:35:31,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:35:31,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996500149] [2023-11-28 20:35:31,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:35:31,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:35:31,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:35:31,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:35:31,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:35:31,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996500149] [2023-11-28 20:35:31,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996500149] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:35:31,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:35:31,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 20:35:31,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451277428] [2023-11-28 20:35:31,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:35:31,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 20:35:31,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:35:31,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 20:35:31,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-28 20:35:31,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 65 [2023-11-28 20:35:31,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 68 transitions, 285 flow. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:31,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:35:31,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 65 [2023-11-28 20:35:31,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:35:36,281 INFO L124 PetriNetUnfolderBase]: 39712/57932 cut-off events. [2023-11-28 20:35:36,281 INFO L125 PetriNetUnfolderBase]: For 87725/91637 co-relation queries the response was YES. [2023-11-28 20:35:36,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156489 conditions, 57932 events. 39712/57932 cut-off events. For 87725/91637 co-relation queries the response was YES. Maximal size of possible extension queue 1876. Compared 426024 event pairs, 22233 based on Foata normal form. 1907/54224 useless extension candidates. Maximal degree in co-relation 68724. Up to 41263 conditions per place. [2023-11-28 20:35:36,816 INFO L140 encePairwiseOnDemand]: 59/65 looper letters, 113 selfloop transitions, 4 changer transitions 0/135 dead transitions. [2023-11-28 20:35:36,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 135 transitions, 887 flow [2023-11-28 20:35:36,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 20:35:36,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-28 20:35:36,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 173 transitions. [2023-11-28 20:35:36,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6653846153846154 [2023-11-28 20:35:36,818 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 173 transitions. [2023-11-28 20:35:36,818 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 173 transitions. [2023-11-28 20:35:36,818 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:35:36,818 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 173 transitions. [2023-11-28 20:35:36,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 43.25) internal successors, (173), 4 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:36,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 65.0) internal successors, (325), 5 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:36,821 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 65.0) internal successors, (325), 5 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:36,821 INFO L175 Difference]: Start difference. First operand has 76 places, 68 transitions, 285 flow. Second operand 4 states and 173 transitions. [2023-11-28 20:35:36,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 135 transitions, 887 flow [2023-11-28 20:35:36,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 135 transitions, 826 flow, removed 30 selfloop flow, removed 1 redundant places. [2023-11-28 20:35:36,940 INFO L231 Difference]: Finished difference. Result has 80 places, 71 transitions, 293 flow [2023-11-28 20:35:36,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=65, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=293, PETRI_PLACES=80, PETRI_TRANSITIONS=71} [2023-11-28 20:35:36,941 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 12 predicate places. [2023-11-28 20:35:36,942 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 71 transitions, 293 flow [2023-11-28 20:35:36,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:36,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:35:36,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:35:36,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-28 20:35:36,942 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-28 20:35:36,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:35:36,943 INFO L85 PathProgramCache]: Analyzing trace with hash -262488702, now seen corresponding path program 1 times [2023-11-28 20:35:36,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:35:36,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787299206] [2023-11-28 20:35:36,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:35:36,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:35:36,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:35:36,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:35:36,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:35:36,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787299206] [2023-11-28 20:35:36,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787299206] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:35:36,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:35:36,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 20:35:36,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485996195] [2023-11-28 20:35:36,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:35:36,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 20:35:36,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:35:36,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 20:35:36,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-28 20:35:37,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 65 [2023-11-28 20:35:37,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 71 transitions, 293 flow. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:37,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:35:37,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 65 [2023-11-28 20:35:37,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:35:44,276 INFO L124 PetriNetUnfolderBase]: 58011/85679 cut-off events. [2023-11-28 20:35:44,276 INFO L125 PetriNetUnfolderBase]: For 86129/96964 co-relation queries the response was YES. [2023-11-28 20:35:44,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230696 conditions, 85679 events. 58011/85679 cut-off events. For 86129/96964 co-relation queries the response was YES. Maximal size of possible extension queue 2494. Compared 664471 event pairs, 32747 based on Foata normal form. 4337/80246 useless extension candidates. Maximal degree in co-relation 81733. Up to 55413 conditions per place. [2023-11-28 20:35:44,835 INFO L140 encePairwiseOnDemand]: 59/65 looper letters, 117 selfloop transitions, 4 changer transitions 0/140 dead transitions. [2023-11-28 20:35:44,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 140 transitions, 849 flow [2023-11-28 20:35:44,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 20:35:44,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-28 20:35:44,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 175 transitions. [2023-11-28 20:35:44,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6730769230769231 [2023-11-28 20:35:44,837 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 175 transitions. [2023-11-28 20:35:44,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 175 transitions. [2023-11-28 20:35:44,837 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:35:44,837 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 175 transitions. [2023-11-28 20:35:44,838 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 43.75) internal successors, (175), 4 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:44,839 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 65.0) internal successors, (325), 5 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:44,840 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 65.0) internal successors, (325), 5 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:44,840 INFO L175 Difference]: Start difference. First operand has 80 places, 71 transitions, 293 flow. Second operand 4 states and 175 transitions. [2023-11-28 20:35:44,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 140 transitions, 849 flow [2023-11-28 20:35:45,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 140 transitions, 840 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-28 20:35:45,364 INFO L231 Difference]: Finished difference. Result has 84 places, 74 transitions, 319 flow [2023-11-28 20:35:45,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=65, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=319, PETRI_PLACES=84, PETRI_TRANSITIONS=74} [2023-11-28 20:35:45,365 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 16 predicate places. [2023-11-28 20:35:45,365 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 74 transitions, 319 flow [2023-11-28 20:35:45,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:45,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:35:45,365 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-28 20:35:45,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-28 20:35:45,366 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-28 20:35:45,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:35:45,366 INFO L85 PathProgramCache]: Analyzing trace with hash 236780323, now seen corresponding path program 1 times [2023-11-28 20:35:45,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:35:45,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996640785] [2023-11-28 20:35:45,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:35:45,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:35:45,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:35:45,427 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:35:45,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:35:45,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996640785] [2023-11-28 20:35:45,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996640785] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:35:45,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209919533] [2023-11-28 20:35:45,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:35:45,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:35:45,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5211747a-c4c6-4a61-b8fc-9a36bae13927/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:35:45,431 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5211747a-c4c6-4a61-b8fc-9a36bae13927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:35:45,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5211747a-c4c6-4a61-b8fc-9a36bae13927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-28 20:35:45,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:35:45,518 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-28 20:35:45,520 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:35:45,553 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:35:45,554 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:35:45,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209919533] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:35:45,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-28 20:35:45,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2023-11-28 20:35:45,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842235877] [2023-11-28 20:35:45,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:35:45,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-28 20:35:45,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:35:45,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-28 20:35:45,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-28 20:35:45,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 65 [2023-11-28 20:35:45,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 74 transitions, 319 flow. Second operand has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:45,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:35:45,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 65 [2023-11-28 20:35:45,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:35:52,208 INFO L124 PetriNetUnfolderBase]: 50567/76106 cut-off events. [2023-11-28 20:35:52,208 INFO L125 PetriNetUnfolderBase]: For 80412/88941 co-relation queries the response was YES. [2023-11-28 20:35:52,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 218506 conditions, 76106 events. 50567/76106 cut-off events. For 80412/88941 co-relation queries the response was YES. Maximal size of possible extension queue 2341. Compared 599712 event pairs, 8823 based on Foata normal form. 5465/73072 useless extension candidates. Maximal degree in co-relation 107067. Up to 23515 conditions per place. [2023-11-28 20:35:52,943 INFO L140 encePairwiseOnDemand]: 60/65 looper letters, 161 selfloop transitions, 7 changer transitions 0/187 dead transitions. [2023-11-28 20:35:52,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 187 transitions, 1111 flow [2023-11-28 20:35:52,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-28 20:35:52,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-28 20:35:52,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 259 transitions. [2023-11-28 20:35:52,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6641025641025641 [2023-11-28 20:35:52,944 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 259 transitions. [2023-11-28 20:35:52,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 259 transitions. [2023-11-28 20:35:52,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:35:52,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 259 transitions. [2023-11-28 20:35:52,946 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 43.166666666666664) internal successors, (259), 6 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:52,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 65.0) internal successors, (455), 7 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:52,947 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 65.0) internal successors, (455), 7 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:52,947 INFO L175 Difference]: Start difference. First operand has 84 places, 74 transitions, 319 flow. Second operand 6 states and 259 transitions. [2023-11-28 20:35:52,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 187 transitions, 1111 flow [2023-11-28 20:35:53,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 187 transitions, 1096 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-28 20:35:53,078 INFO L231 Difference]: Finished difference. Result has 87 places, 73 transitions, 326 flow [2023-11-28 20:35:53,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=65, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=326, PETRI_PLACES=87, PETRI_TRANSITIONS=73} [2023-11-28 20:35:53,079 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 19 predicate places. [2023-11-28 20:35:53,079 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 73 transitions, 326 flow [2023-11-28 20:35:53,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:53,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:35:53,080 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-11-28 20:35:53,084 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5211747a-c4c6-4a61-b8fc-9a36bae13927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-28 20:35:53,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5211747a-c4c6-4a61-b8fc-9a36bae13927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:35:53,280 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-28 20:35:53,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:35:53,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1249744110, now seen corresponding path program 1 times [2023-11-28 20:35:53,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:35:53,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469435324] [2023-11-28 20:35:53,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:35:53,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:35:53,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:35:53,339 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:35:53,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:35:53,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469435324] [2023-11-28 20:35:53,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469435324] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:35:53,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832078429] [2023-11-28 20:35:53,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:35:53,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:35:53,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5211747a-c4c6-4a61-b8fc-9a36bae13927/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:35:53,342 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5211747a-c4c6-4a61-b8fc-9a36bae13927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:35:53,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5211747a-c4c6-4a61-b8fc-9a36bae13927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-28 20:35:53,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:35:53,416 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-28 20:35:53,417 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:35:53,447 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:35:53,447 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:35:53,486 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:35:53,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832078429] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:35:53,486 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:35:53,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-28 20:35:53,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971990868] [2023-11-28 20:35:53,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:35:53,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-28 20:35:53,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:35:53,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-28 20:35:53,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-28 20:35:53,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 65 [2023-11-28 20:35:53,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 73 transitions, 326 flow. Second operand has 12 states, 12 states have (on average 22.666666666666668) internal successors, (272), 12 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:53,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:35:53,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 65 [2023-11-28 20:35:53,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:36:08,583 INFO L124 PetriNetUnfolderBase]: 105469/160324 cut-off events. [2023-11-28 20:36:08,583 INFO L125 PetriNetUnfolderBase]: For 216131/233470 co-relation queries the response was YES. [2023-11-28 20:36:09,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 474008 conditions, 160324 events. 105469/160324 cut-off events. For 216131/233470 co-relation queries the response was YES. Maximal size of possible extension queue 3672. Compared 1339159 event pairs, 24655 based on Foata normal form. 11477/159240 useless extension candidates. Maximal degree in co-relation 210373. Up to 61925 conditions per place. [2023-11-28 20:36:10,034 INFO L140 encePairwiseOnDemand]: 60/65 looper letters, 302 selfloop transitions, 13 changer transitions 0/334 dead transitions. [2023-11-28 20:36:10,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 334 transitions, 2093 flow [2023-11-28 20:36:10,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-28 20:36:10,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-28 20:36:10,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 451 transitions. [2023-11-28 20:36:10,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6938461538461539 [2023-11-28 20:36:10,037 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 451 transitions. [2023-11-28 20:36:10,037 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 451 transitions. [2023-11-28 20:36:10,038 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:36:10,038 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 451 transitions. [2023-11-28 20:36:10,039 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 45.1) internal successors, (451), 10 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:36:10,040 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 65.0) internal successors, (715), 11 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:36:10,041 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 65.0) internal successors, (715), 11 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:36:10,041 INFO L175 Difference]: Start difference. First operand has 87 places, 73 transitions, 326 flow. Second operand 10 states and 451 transitions. [2023-11-28 20:36:10,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 334 transitions, 2093 flow [2023-11-28 20:36:10,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 334 transitions, 2063 flow, removed 8 selfloop flow, removed 4 redundant places. [2023-11-28 20:36:10,747 INFO L231 Difference]: Finished difference. Result has 95 places, 82 transitions, 394 flow [2023-11-28 20:36:10,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=65, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=394, PETRI_PLACES=95, PETRI_TRANSITIONS=82} [2023-11-28 20:36:10,749 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 27 predicate places. [2023-11-28 20:36:10,749 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 82 transitions, 394 flow [2023-11-28 20:36:10,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 22.666666666666668) internal successors, (272), 12 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:36:10,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:36:10,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:36:10,754 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5211747a-c4c6-4a61-b8fc-9a36bae13927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-28 20:36:10,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5211747a-c4c6-4a61-b8fc-9a36bae13927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:36:10,950 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread4Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-28 20:36:10,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:36:10,950 INFO L85 PathProgramCache]: Analyzing trace with hash -144574576, now seen corresponding path program 1 times [2023-11-28 20:36:10,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:36:10,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297887233] [2023-11-28 20:36:10,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:36:10,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:36:10,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:36:11,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:36:11,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:36:11,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297887233] [2023-11-28 20:36:11,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297887233] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:36:11,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:36:11,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-28 20:36:11,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361309864] [2023-11-28 20:36:11,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:36:11,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 20:36:11,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:36:11,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 20:36:11,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-28 20:36:11,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 65 [2023-11-28 20:36:11,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 82 transitions, 394 flow. Second operand has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:36:11,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:36:11,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 65 [2023-11-28 20:36:11,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:36:28,807 INFO L124 PetriNetUnfolderBase]: 115128/184783 cut-off events. [2023-11-28 20:36:28,807 INFO L125 PetriNetUnfolderBase]: For 307792/328466 co-relation queries the response was YES. [2023-11-28 20:36:29,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 548071 conditions, 184783 events. 115128/184783 cut-off events. For 307792/328466 co-relation queries the response was YES. Maximal size of possible extension queue 4780. Compared 1705284 event pairs, 29115 based on Foata normal form. 7656/177712 useless extension candidates. Maximal degree in co-relation 401652. Up to 50983 conditions per place. [2023-11-28 20:36:30,559 INFO L140 encePairwiseOnDemand]: 59/65 looper letters, 140 selfloop transitions, 6 changer transitions 0/171 dead transitions. [2023-11-28 20:36:30,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 171 transitions, 1170 flow [2023-11-28 20:36:30,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 20:36:30,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-28 20:36:30,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 190 transitions. [2023-11-28 20:36:30,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7307692307692307 [2023-11-28 20:36:30,561 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 190 transitions. [2023-11-28 20:36:30,561 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 190 transitions. [2023-11-28 20:36:30,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:36:30,562 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 190 transitions. [2023-11-28 20:36:30,562 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 47.5) internal successors, (190), 4 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:36:30,563 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 65.0) internal successors, (325), 5 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:36:30,563 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 65.0) internal successors, (325), 5 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:36:30,563 INFO L175 Difference]: Start difference. First operand has 95 places, 82 transitions, 394 flow. Second operand 4 states and 190 transitions. [2023-11-28 20:36:30,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 171 transitions, 1170 flow [2023-11-28 20:36:31,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 171 transitions, 1141 flow, removed 9 selfloop flow, removed 2 redundant places. [2023-11-28 20:36:31,753 INFO L231 Difference]: Finished difference. Result has 99 places, 86 transitions, 441 flow [2023-11-28 20:36:31,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=65, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=441, PETRI_PLACES=99, PETRI_TRANSITIONS=86} [2023-11-28 20:36:31,754 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 31 predicate places. [2023-11-28 20:36:31,754 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 86 transitions, 441 flow [2023-11-28 20:36:31,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:36:31,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:36:31,754 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:36:31,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-28 20:36:31,754 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-28 20:36:31,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:36:31,755 INFO L85 PathProgramCache]: Analyzing trace with hash -102719535, now seen corresponding path program 1 times [2023-11-28 20:36:31,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:36:31,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993424516] [2023-11-28 20:36:31,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:36:31,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:36:31,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:36:31,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:36:31,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:36:31,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993424516] [2023-11-28 20:36:31,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993424516] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:36:31,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812179704] [2023-11-28 20:36:31,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:36:31,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:36:31,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5211747a-c4c6-4a61-b8fc-9a36bae13927/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:36:31,928 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5211747a-c4c6-4a61-b8fc-9a36bae13927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:36:31,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5211747a-c4c6-4a61-b8fc-9a36bae13927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-28 20:36:32,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:36:32,012 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-28 20:36:32,013 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:36:32,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:36:32,038 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:36:32,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812179704] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:36:32,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-28 20:36:32,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 3 [2023-11-28 20:36:32,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142152400] [2023-11-28 20:36:32,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:36:32,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 20:36:32,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:36:32,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 20:36:32,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-28 20:36:32,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 65 [2023-11-28 20:36:32,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 86 transitions, 441 flow. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:36:32,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:36:32,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 65 [2023-11-28 20:36:32,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:36:51,299 INFO L124 PetriNetUnfolderBase]: 122354/193636 cut-off events. [2023-11-28 20:36:51,299 INFO L125 PetriNetUnfolderBase]: For 402712/425623 co-relation queries the response was YES. [2023-11-28 20:36:52,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 611293 conditions, 193636 events. 122354/193636 cut-off events. For 402712/425623 co-relation queries the response was YES. Maximal size of possible extension queue 4755. Compared 1756523 event pairs, 35878 based on Foata normal form. 12188/197797 useless extension candidates. Maximal degree in co-relation 552595. Up to 87274 conditions per place. [2023-11-28 20:36:53,229 INFO L140 encePairwiseOnDemand]: 59/65 looper letters, 98 selfloop transitions, 8 changer transitions 0/131 dead transitions. [2023-11-28 20:36:53,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 131 transitions, 894 flow [2023-11-28 20:36:53,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 20:36:53,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-28 20:36:53,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 161 transitions. [2023-11-28 20:36:53,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6192307692307693 [2023-11-28 20:36:53,231 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 161 transitions. [2023-11-28 20:36:53,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 161 transitions. [2023-11-28 20:36:53,232 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:36:53,232 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 161 transitions. [2023-11-28 20:36:53,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:36:53,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 65.0) internal successors, (325), 5 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:36:53,234 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 65.0) internal successors, (325), 5 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:36:53,234 INFO L175 Difference]: Start difference. First operand has 99 places, 86 transitions, 441 flow. Second operand 4 states and 161 transitions. [2023-11-28 20:36:53,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 131 transitions, 894 flow [2023-11-28 20:36:58,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 131 transitions, 888 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-28 20:36:58,060 INFO L231 Difference]: Finished difference. Result has 102 places, 88 transitions, 488 flow [2023-11-28 20:36:58,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=65, PETRI_DIFFERENCE_MINUEND_FLOW=419, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=488, PETRI_PLACES=102, PETRI_TRANSITIONS=88} [2023-11-28 20:36:58,061 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 34 predicate places. [2023-11-28 20:36:58,061 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 88 transitions, 488 flow [2023-11-28 20:36:58,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:36:58,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:36:58,061 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:36:58,065 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5211747a-c4c6-4a61-b8fc-9a36bae13927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-28 20:36:58,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5211747a-c4c6-4a61-b8fc-9a36bae13927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-28 20:36:58,262 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-28 20:36:58,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:36:58,262 INFO L85 PathProgramCache]: Analyzing trace with hash -41977221, now seen corresponding path program 1 times [2023-11-28 20:36:58,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:36:58,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278673778] [2023-11-28 20:36:58,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:36:58,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:36:58,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:36:58,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:36:58,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:36:58,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278673778] [2023-11-28 20:36:58,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278673778] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:36:58,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476369387] [2023-11-28 20:36:58,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:36:58,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:36:58,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5211747a-c4c6-4a61-b8fc-9a36bae13927/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:36:58,316 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5211747a-c4c6-4a61-b8fc-9a36bae13927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:36:58,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5211747a-c4c6-4a61-b8fc-9a36bae13927/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-28 20:36:58,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:36:58,406 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-28 20:36:58,407 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:36:58,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:36:58,437 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:36:58,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:36:58,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476369387] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:36:58,485 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:36:58,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-11-28 20:36:58,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385439499] [2023-11-28 20:36:58,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:36:58,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-28 20:36:58,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:36:58,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-28 20:36:58,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-11-28 20:36:58,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 65 [2023-11-28 20:36:58,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 88 transitions, 488 flow. Second operand has 9 states, 9 states have (on average 26.77777777777778) internal successors, (241), 9 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:36:58,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:36:58,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 65 [2023-11-28 20:36:58,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand