./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme --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 613bf9314e4e3fb6e64527ec38c7e6b39400e524de37a5103e9f06d9db406d3d --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 10:43:01,879 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 10:43:02,005 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-11-26 10:43:02,014 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 10:43:02,015 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 10:43:02,059 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 10:43:02,060 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 10:43:02,061 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 10:43:02,062 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 10:43:02,067 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 10:43:02,067 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 10:43:02,068 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 10:43:02,069 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 10:43:02,071 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 10:43:02,072 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 10:43:02,072 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 10:43:02,073 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 10:43:02,073 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 10:43:02,074 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 10:43:02,074 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 10:43:02,076 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 10:43:02,077 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 10:43:02,077 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 10:43:02,077 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 10:43:02,078 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-26 10:43:02,078 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-26 10:43:02,079 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 10:43:02,079 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 10:43:02,080 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 10:43:02,081 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 10:43:02,082 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 10:43:02,083 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 10:43:02,083 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 10:43:02,083 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:43:02,084 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 10:43:02,084 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 10:43:02,084 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 10:43:02,085 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 10:43:02,085 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 10:43:02,085 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 10:43:02,086 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 10:43:02,086 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 10:43:02,086 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 10:43:02,086 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 10:43:02,087 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_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 613bf9314e4e3fb6e64527ec38c7e6b39400e524de37a5103e9f06d9db406d3d [2023-11-26 10:43:02,409 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 10:43:02,441 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 10:43:02,444 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 10:43:02,446 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 10:43:02,446 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 10:43:02,448 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c [2023-11-26 10:43:05,864 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 10:43:06,109 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 10:43:06,110 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c [2023-11-26 10:43:06,122 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/data/3249110d7/9f17d85ad8fb4e619627b6b4ac5f8b3e/FLAGce2956820 [2023-11-26 10:43:06,141 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/data/3249110d7/9f17d85ad8fb4e619627b6b4ac5f8b3e [2023-11-26 10:43:06,147 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 10:43:06,149 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 10:43:06,153 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 10:43:06,153 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 10:43:06,160 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 10:43:06,161 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:43:06" (1/1) ... [2023-11-26 10:43:06,162 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f7930f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:06, skipping insertion in model container [2023-11-26 10:43:06,163 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:43:06" (1/1) ... [2023-11-26 10:43:06,199 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 10:43:06,471 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:43:06,484 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 10:43:06,539 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:43:06,549 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 10:43:06,549 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 10:43:06,558 INFO L206 MainTranslator]: Completed translation [2023-11-26 10:43:06,559 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:06 WrapperNode [2023-11-26 10:43:06,559 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 10:43:06,561 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 10:43:06,561 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 10:43:06,561 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 10:43:06,570 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:06" (1/1) ... [2023-11-26 10:43:06,599 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:06" (1/1) ... [2023-11-26 10:43:06,640 INFO L138 Inliner]: procedures = 25, calls = 40, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 185 [2023-11-26 10:43:06,644 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 10:43:06,645 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 10:43:06,645 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 10:43:06,645 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 10:43:06,657 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:06" (1/1) ... [2023-11-26 10:43:06,658 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:06" (1/1) ... [2023-11-26 10:43:06,661 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:06" (1/1) ... [2023-11-26 10:43:06,679 INFO L175 MemorySlicer]: Split 10 memory accesses to 4 slices as follows [2, 2, 4, 2]. 40 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2023-11-26 10:43:06,679 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:06" (1/1) ... [2023-11-26 10:43:06,679 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:06" (1/1) ... [2023-11-26 10:43:06,688 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:06" (1/1) ... [2023-11-26 10:43:06,693 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:06" (1/1) ... [2023-11-26 10:43:06,695 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:06" (1/1) ... [2023-11-26 10:43:06,697 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:06" (1/1) ... [2023-11-26 10:43:06,702 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 10:43:06,703 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 10:43:06,703 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 10:43:06,703 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 10:43:06,704 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:06" (1/1) ... [2023-11-26 10:43:06,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:43:06,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:43:06,741 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 10:43:06,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 10:43:06,777 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 10:43:06,777 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 10:43:06,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 10:43:06,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 10:43:06,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 10:43:06,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-26 10:43:06,777 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 10:43:06,778 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 10:43:06,778 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 10:43:06,778 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-26 10:43:06,778 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-26 10:43:06,778 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-26 10:43:06,779 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-26 10:43:06,779 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-26 10:43:06,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 10:43:06,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 10:43:06,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 10:43:06,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-26 10:43:06,780 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-26 10:43:06,780 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-26 10:43:06,780 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-26 10:43:06,780 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 10:43:06,780 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 10:43:06,781 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 10:43:06,782 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-26 10:43:06,928 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 10:43:06,930 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 10:43:07,367 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 10:43:07,826 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 10:43:07,826 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-26 10:43:07,827 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:43:07 BoogieIcfgContainer [2023-11-26 10:43:07,827 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 10:43:07,832 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 10:43:07,832 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 10:43:07,836 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 10:43:07,836 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 10:43:06" (1/3) ... [2023-11-26 10:43:07,837 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38771cb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:43:07, skipping insertion in model container [2023-11-26 10:43:07,837 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:06" (2/3) ... [2023-11-26 10:43:07,840 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38771cb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:43:07, skipping insertion in model container [2023-11-26 10:43:07,840 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:43:07" (3/3) ... [2023-11-26 10:43:07,842 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-queue-add-2-nl.wvr.c [2023-11-26 10:43:07,852 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-26 10:43:07,865 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 10:43:07,865 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2023-11-26 10:43:07,866 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-26 10:43:07,949 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-26 10:43:08,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 48 places, 45 transitions, 104 flow [2023-11-26 10:43:08,057 INFO L124 PetriNetUnfolderBase]: 4/43 cut-off events. [2023-11-26 10:43:08,057 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-26 10:43:08,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52 conditions, 43 events. 4/43 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 113 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 33. Up to 2 conditions per place. [2023-11-26 10:43:08,063 INFO L82 GeneralOperation]: Start removeDead. Operand has 48 places, 45 transitions, 104 flow [2023-11-26 10:43:08,068 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 41 transitions, 91 flow [2023-11-26 10:43:08,077 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 10:43:08,084 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;@715b9bb9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 10:43:08,084 INFO L358 AbstractCegarLoop]: Starting to check reachability of 24 error locations. [2023-11-26 10:43:08,092 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 10:43:08,093 INFO L124 PetriNetUnfolderBase]: 0/3 cut-off events. [2023-11-26 10:43:08,093 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-26 10:43:08,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:43:08,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-26 10:43:08,094 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-26 10:43:08,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:08,103 INFO L85 PathProgramCache]: Analyzing trace with hash 554841, now seen corresponding path program 1 times [2023-11-26 10:43:08,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:08,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352851367] [2023-11-26 10:43:08,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:08,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:08,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:08,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:08,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:08,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352851367] [2023-11-26 10:43:08,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352851367] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:43:08,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:43:08,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:43:08,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142385949] [2023-11-26 10:43:08,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:43:08,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:43:08,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:08,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:43:08,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:43:08,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 45 [2023-11-26 10:43:08,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 41 transitions, 91 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:08,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:43:08,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 45 [2023-11-26 10:43:08,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:43:08,931 INFO L124 PetriNetUnfolderBase]: 182/407 cut-off events. [2023-11-26 10:43:08,933 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-11-26 10:43:08,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 757 conditions, 407 events. 182/407 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2093 event pairs, 159 based on Foata normal form. 21/321 useless extension candidates. Maximal degree in co-relation 679. Up to 319 conditions per place. [2023-11-26 10:43:08,943 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 25 selfloop transitions, 4 changer transitions 0/40 dead transitions. [2023-11-26 10:43:08,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 40 transitions, 147 flow [2023-11-26 10:43:08,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:43:08,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 10:43:08,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 87 transitions. [2023-11-26 10:43:08,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2023-11-26 10:43:08,960 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 87 transitions. [2023-11-26 10:43:08,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 87 transitions. [2023-11-26 10:43:08,961 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:43:08,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 87 transitions. [2023-11-26 10:43:08,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:08,970 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 45.0) internal successors, (225), 5 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:08,971 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 45.0) internal successors, (225), 5 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:08,973 INFO L175 Difference]: Start difference. First operand has 44 places, 41 transitions, 91 flow. Second operand 4 states and 87 transitions. [2023-11-26 10:43:08,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 40 transitions, 147 flow [2023-11-26 10:43:08,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 40 transitions, 142 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-26 10:43:08,980 INFO L231 Difference]: Finished difference. Result has 43 places, 40 transitions, 107 flow [2023-11-26 10:43:08,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=107, PETRI_PLACES=43, PETRI_TRANSITIONS=40} [2023-11-26 10:43:08,986 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -1 predicate places. [2023-11-26 10:43:08,986 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 40 transitions, 107 flow [2023-11-26 10:43:08,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:08,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:43:08,987 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-26 10:43:08,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 10:43:08,988 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-26 10:43:08,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:08,989 INFO L85 PathProgramCache]: Analyzing trace with hash -650048995, now seen corresponding path program 1 times [2023-11-26 10:43:08,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:08,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516385042] [2023-11-26 10:43:08,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:08,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:09,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:09,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:09,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:09,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516385042] [2023-11-26 10:43:09,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516385042] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:43:09,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795597187] [2023-11-26 10:43:09,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:09,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:43:09,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:43:09,168 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:43:09,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 10:43:09,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:09,286 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 10:43:09,291 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:43:09,347 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:09,347 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:43:09,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795597187] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:43:09,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 10:43:09,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-11-26 10:43:09,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049053781] [2023-11-26 10:43:09,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:43:09,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:43:09,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:09,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:43:09,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-26 10:43:09,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 45 [2023-11-26 10:43:09,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 40 transitions, 107 flow. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:09,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:43:09,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 45 [2023-11-26 10:43:09,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:43:09,550 INFO L124 PetriNetUnfolderBase]: 182/406 cut-off events. [2023-11-26 10:43:09,550 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-26 10:43:09,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 760 conditions, 406 events. 182/406 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2092 event pairs, 159 based on Foata normal form. 1/301 useless extension candidates. Maximal degree in co-relation 733. Up to 314 conditions per place. [2023-11-26 10:43:09,557 INFO L140 encePairwiseOnDemand]: 40/45 looper letters, 21 selfloop transitions, 7 changer transitions 0/39 dead transitions. [2023-11-26 10:43:09,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 39 transitions, 159 flow [2023-11-26 10:43:09,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:43:09,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 10:43:09,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2023-11-26 10:43:09,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3962962962962963 [2023-11-26 10:43:09,561 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 107 transitions. [2023-11-26 10:43:09,561 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 107 transitions. [2023-11-26 10:43:09,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:43:09,562 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 107 transitions. [2023-11-26 10:43:09,564 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:09,567 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 45.0) internal successors, (315), 7 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:09,568 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 45.0) internal successors, (315), 7 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:09,568 INFO L175 Difference]: Start difference. First operand has 43 places, 40 transitions, 107 flow. Second operand 6 states and 107 transitions. [2023-11-26 10:43:09,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 39 transitions, 159 flow [2023-11-26 10:43:09,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 39 transitions, 156 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 10:43:09,574 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 114 flow [2023-11-26 10:43:09,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=114, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2023-11-26 10:43:09,579 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 2 predicate places. [2023-11-26 10:43:09,579 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 114 flow [2023-11-26 10:43:09,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:09,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:43:09,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-26 10:43:09,593 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 10:43:09,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:43:09,787 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-26 10:43:09,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:09,788 INFO L85 PathProgramCache]: Analyzing trace with hash -648194816, now seen corresponding path program 1 times [2023-11-26 10:43:09,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:09,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509864976] [2023-11-26 10:43:09,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:09,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:09,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:10,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:10,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:10,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509864976] [2023-11-26 10:43:10,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509864976] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:43:10,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:43:10,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:43:10,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612755644] [2023-11-26 10:43:10,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:43:10,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:43:10,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:10,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:43:10,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:43:10,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 45 [2023-11-26 10:43:10,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:10,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:43:10,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 45 [2023-11-26 10:43:10,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:43:10,208 INFO L124 PetriNetUnfolderBase]: 194/441 cut-off events. [2023-11-26 10:43:10,209 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-26 10:43:10,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 837 conditions, 441 events. 194/441 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2206 event pairs, 172 based on Foata normal form. 14/360 useless extension candidates. Maximal degree in co-relation 735. Up to 316 conditions per place. [2023-11-26 10:43:10,214 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 24 selfloop transitions, 2 changer transitions 8/46 dead transitions. [2023-11-26 10:43:10,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 46 transitions, 199 flow [2023-11-26 10:43:10,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:43:10,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 10:43:10,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 100 transitions. [2023-11-26 10:43:10,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2023-11-26 10:43:10,217 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 100 transitions. [2023-11-26 10:43:10,217 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 100 transitions. [2023-11-26 10:43:10,217 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:43:10,217 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 100 transitions. [2023-11-26 10:43:10,218 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:10,219 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 45.0) internal successors, (225), 5 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:10,220 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 45.0) internal successors, (225), 5 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:10,220 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 114 flow. Second operand 4 states and 100 transitions. [2023-11-26 10:43:10,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 46 transitions, 199 flow [2023-11-26 10:43:10,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 46 transitions, 177 flow, removed 2 selfloop flow, removed 5 redundant places. [2023-11-26 10:43:10,224 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 106 flow [2023-11-26 10:43:10,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=106, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2023-11-26 10:43:10,225 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 1 predicate places. [2023-11-26 10:43:10,225 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 106 flow [2023-11-26 10:43:10,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:10,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:43:10,226 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2023-11-26 10:43:10,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 10:43:10,227 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-26 10:43:10,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:10,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1323318191, now seen corresponding path program 1 times [2023-11-26 10:43:10,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:10,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115411512] [2023-11-26 10:43:10,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:10,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:10,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:10,358 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:10,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:10,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115411512] [2023-11-26 10:43:10,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115411512] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:43:10,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129476694] [2023-11-26 10:43:10,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:10,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:43:10,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:43:10,361 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:43:10,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 10:43:10,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:10,460 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 10:43:10,461 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:43:10,492 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:10,492 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:43:10,544 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:10,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129476694] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:43:10,544 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:43:10,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-11-26 10:43:10,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933533105] [2023-11-26 10:43:10,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:43:10,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-26 10:43:10,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:10,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-26 10:43:10,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-26 10:43:10,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 45 [2023-11-26 10:43:10,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 106 flow. Second operand has 12 states, 12 states have (on average 14.083333333333334) internal successors, (169), 12 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:10,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:43:10,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 45 [2023-11-26 10:43:10,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:43:10,739 INFO L124 PetriNetUnfolderBase]: 184/417 cut-off events. [2023-11-26 10:43:10,740 INFO L125 PetriNetUnfolderBase]: For 61/61 co-relation queries the response was YES. [2023-11-26 10:43:10,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 877 conditions, 417 events. 184/417 cut-off events. For 61/61 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2158 event pairs, 159 based on Foata normal form. 3/312 useless extension candidates. Maximal degree in co-relation 861. Up to 320 conditions per place. [2023-11-26 10:43:10,744 INFO L140 encePairwiseOnDemand]: 40/45 looper letters, 24 selfloop transitions, 12 changer transitions 0/47 dead transitions. [2023-11-26 10:43:10,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 47 transitions, 208 flow [2023-11-26 10:43:10,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 10:43:10,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-26 10:43:10,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2023-11-26 10:43:10,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37555555555555553 [2023-11-26 10:43:10,754 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 169 transitions. [2023-11-26 10:43:10,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 169 transitions. [2023-11-26 10:43:10,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:43:10,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 169 transitions. [2023-11-26 10:43:10,757 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 16.9) internal successors, (169), 10 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:10,761 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 45.0) internal successors, (495), 11 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:10,763 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 45.0) internal successors, (495), 11 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:10,767 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 106 flow. Second operand 10 states and 169 transitions. [2023-11-26 10:43:10,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 47 transitions, 208 flow [2023-11-26 10:43:10,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 47 transitions, 204 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 10:43:10,770 INFO L231 Difference]: Finished difference. Result has 54 places, 47 transitions, 174 flow [2023-11-26 10:43:10,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=174, PETRI_PLACES=54, PETRI_TRANSITIONS=47} [2023-11-26 10:43:10,771 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 10 predicate places. [2023-11-26 10:43:10,771 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 47 transitions, 174 flow [2023-11-26 10:43:10,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 14.083333333333334) internal successors, (169), 12 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:10,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:43:10,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:43:10,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 10:43:10,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:43:10,980 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-26 10:43:10,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:10,981 INFO L85 PathProgramCache]: Analyzing trace with hash 400333756, now seen corresponding path program 1 times [2023-11-26 10:43:10,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:10,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154694842] [2023-11-26 10:43:10,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:10,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:10,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:11,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:11,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:11,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154694842] [2023-11-26 10:43:11,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154694842] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:43:11,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28321906] [2023-11-26 10:43:11,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:11,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:43:11,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:43:11,110 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:43:11,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 10:43:11,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:11,222 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 10:43:11,223 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:43:11,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:43:11,251 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:43:11,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28321906] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:43:11,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 10:43:11,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4] total 5 [2023-11-26 10:43:11,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161933368] [2023-11-26 10:43:11,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:43:11,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:43:11,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:11,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:43:11,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:43:11,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 45 [2023-11-26 10:43:11,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 47 transitions, 174 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:11,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:43:11,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 45 [2023-11-26 10:43:11,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:43:11,347 INFO L124 PetriNetUnfolderBase]: 123/296 cut-off events. [2023-11-26 10:43:11,347 INFO L125 PetriNetUnfolderBase]: For 69/69 co-relation queries the response was YES. [2023-11-26 10:43:11,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 614 conditions, 296 events. 123/296 cut-off events. For 69/69 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1364 event pairs, 102 based on Foata normal form. 0/251 useless extension candidates. Maximal degree in co-relation 579. Up to 223 conditions per place. [2023-11-26 10:43:11,350 INFO L140 encePairwiseOnDemand]: 41/45 looper letters, 31 selfloop transitions, 1 changer transitions 0/44 dead transitions. [2023-11-26 10:43:11,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 44 transitions, 226 flow [2023-11-26 10:43:11,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:43:11,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:43:11,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 69 transitions. [2023-11-26 10:43:11,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5111111111111111 [2023-11-26 10:43:11,352 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 69 transitions. [2023-11-26 10:43:11,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 69 transitions. [2023-11-26 10:43:11,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:43:11,352 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 69 transitions. [2023-11-26 10:43:11,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:11,353 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:11,353 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:11,353 INFO L175 Difference]: Start difference. First operand has 54 places, 47 transitions, 174 flow. Second operand 3 states and 69 transitions. [2023-11-26 10:43:11,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 44 transitions, 226 flow [2023-11-26 10:43:11,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 44 transitions, 216 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-26 10:43:11,357 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 154 flow [2023-11-26 10:43:11,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=154, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2023-11-26 10:43:11,358 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 7 predicate places. [2023-11-26 10:43:11,359 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 154 flow [2023-11-26 10:43:11,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:11,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:43:11,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:43:11,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 10:43:11,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:43:11,573 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-26 10:43:11,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:11,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1826298817, now seen corresponding path program 1 times [2023-11-26 10:43:11,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:11,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538456405] [2023-11-26 10:43:11,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:11,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:11,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:11,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:43:11,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:11,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538456405] [2023-11-26 10:43:11,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538456405] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:43:11,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:43:11,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:43:11,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60648191] [2023-11-26 10:43:11,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:43:11,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:43:11,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:11,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:43:11,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:43:11,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 45 [2023-11-26 10:43:11,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 154 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:11,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:43:11,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 45 [2023-11-26 10:43:11,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:43:11,773 INFO L124 PetriNetUnfolderBase]: 210/443 cut-off events. [2023-11-26 10:43:11,773 INFO L125 PetriNetUnfolderBase]: For 79/79 co-relation queries the response was YES. [2023-11-26 10:43:11,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 937 conditions, 443 events. 210/443 cut-off events. For 79/79 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 2061 event pairs, 132 based on Foata normal form. 12/413 useless extension candidates. Maximal degree in co-relation 925. Up to 290 conditions per place. [2023-11-26 10:43:11,778 INFO L140 encePairwiseOnDemand]: 39/45 looper letters, 48 selfloop transitions, 4 changer transitions 0/62 dead transitions. [2023-11-26 10:43:11,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 62 transitions, 304 flow [2023-11-26 10:43:11,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:43:11,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 10:43:11,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 95 transitions. [2023-11-26 10:43:11,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5277777777777778 [2023-11-26 10:43:11,779 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 95 transitions. [2023-11-26 10:43:11,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 95 transitions. [2023-11-26 10:43:11,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:43:11,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 95 transitions. [2023-11-26 10:43:11,780 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:11,781 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 45.0) internal successors, (225), 5 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:11,781 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 45.0) internal successors, (225), 5 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:11,782 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 154 flow. Second operand 4 states and 95 transitions. [2023-11-26 10:43:11,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 62 transitions, 304 flow [2023-11-26 10:43:11,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 62 transitions, 303 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 10:43:11,785 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 182 flow [2023-11-26 10:43:11,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=182, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2023-11-26 10:43:11,786 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 11 predicate places. [2023-11-26 10:43:11,787 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 182 flow [2023-11-26 10:43:11,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:11,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:43:11,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:43:11,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-26 10:43:11,788 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-26 10:43:11,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:11,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1468406153, now seen corresponding path program 1 times [2023-11-26 10:43:11,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:11,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338079833] [2023-11-26 10:43:11,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:11,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:11,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:11,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:43:11,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:11,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338079833] [2023-11-26 10:43:11,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338079833] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:43:11,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:43:11,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:43:11,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635174756] [2023-11-26 10:43:11,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:43:11,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:43:11,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:11,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:43:11,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:43:11,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 45 [2023-11-26 10:43:11,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:11,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:43:11,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 45 [2023-11-26 10:43:11,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:43:11,946 INFO L124 PetriNetUnfolderBase]: 169/411 cut-off events. [2023-11-26 10:43:11,946 INFO L125 PetriNetUnfolderBase]: For 143/146 co-relation queries the response was YES. [2023-11-26 10:43:11,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 945 conditions, 411 events. 169/411 cut-off events. For 143/146 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1925 event pairs, 55 based on Foata normal form. 3/380 useless extension candidates. Maximal degree in co-relation 931. Up to 247 conditions per place. [2023-11-26 10:43:11,951 INFO L140 encePairwiseOnDemand]: 41/45 looper letters, 38 selfloop transitions, 3 changer transitions 0/53 dead transitions. [2023-11-26 10:43:11,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 53 transitions, 282 flow [2023-11-26 10:43:11,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:43:11,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:43:11,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 74 transitions. [2023-11-26 10:43:11,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5481481481481482 [2023-11-26 10:43:11,952 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 74 transitions. [2023-11-26 10:43:11,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 74 transitions. [2023-11-26 10:43:11,953 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:43:11,953 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 74 transitions. [2023-11-26 10:43:11,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:11,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:11,954 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:11,954 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 182 flow. Second operand 3 states and 74 transitions. [2023-11-26 10:43:11,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 53 transitions, 282 flow [2023-11-26 10:43:11,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 53 transitions, 279 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 10:43:11,960 INFO L231 Difference]: Finished difference. Result has 57 places, 49 transitions, 202 flow [2023-11-26 10:43:11,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=179, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=202, PETRI_PLACES=57, PETRI_TRANSITIONS=49} [2023-11-26 10:43:11,961 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 13 predicate places. [2023-11-26 10:43:11,961 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 49 transitions, 202 flow [2023-11-26 10:43:11,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:11,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:43:11,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:43:11,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-26 10:43:11,962 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-26 10:43:11,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:11,963 INFO L85 PathProgramCache]: Analyzing trace with hash 2044403078, now seen corresponding path program 1 times [2023-11-26 10:43:11,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:11,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132387834] [2023-11-26 10:43:11,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:11,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:11,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:12,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:12,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:12,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132387834] [2023-11-26 10:43:12,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132387834] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:43:12,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396974179] [2023-11-26 10:43:12,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:12,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:43:12,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:43:12,601 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:43:12,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 10:43:12,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:12,726 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-26 10:43:12,730 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:43:12,817 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-26 10:43:13,344 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-26 10:43:13,345 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2023-11-26 10:43:13,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:13,381 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:43:13,835 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2023-11-26 10:43:13,842 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2023-11-26 10:43:13,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:13,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396974179] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:43:13,892 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:43:13,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2023-11-26 10:43:13,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555876521] [2023-11-26 10:43:13,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:43:13,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-26 10:43:13,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:13,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-26 10:43:13,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2023-11-26 10:43:14,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 45 [2023-11-26 10:43:14,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 49 transitions, 202 flow. Second operand has 23 states, 23 states have (on average 10.565217391304348) internal successors, (243), 23 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:14,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:43:14,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 45 [2023-11-26 10:43:14,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:43:18,598 INFO L124 PetriNetUnfolderBase]: 1183/2416 cut-off events. [2023-11-26 10:43:18,599 INFO L125 PetriNetUnfolderBase]: For 1520/1584 co-relation queries the response was YES. [2023-11-26 10:43:18,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6039 conditions, 2416 events. 1183/2416 cut-off events. For 1520/1584 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 15707 event pairs, 121 based on Foata normal form. 2/2316 useless extension candidates. Maximal degree in co-relation 6023. Up to 431 conditions per place. [2023-11-26 10:43:18,626 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 253 selfloop transitions, 63 changer transitions 2/325 dead transitions. [2023-11-26 10:43:18,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 325 transitions, 1857 flow [2023-11-26 10:43:18,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-26 10:43:18,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-11-26 10:43:18,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 601 transitions. [2023-11-26 10:43:18,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4047138047138047 [2023-11-26 10:43:18,631 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 601 transitions. [2023-11-26 10:43:18,631 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 601 transitions. [2023-11-26 10:43:18,632 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:43:18,632 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 601 transitions. [2023-11-26 10:43:18,637 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 18.21212121212121) internal successors, (601), 33 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:18,642 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 45.0) internal successors, (1530), 34 states have internal predecessors, (1530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:18,643 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 45.0) internal successors, (1530), 34 states have internal predecessors, (1530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:18,643 INFO L175 Difference]: Start difference. First operand has 57 places, 49 transitions, 202 flow. Second operand 33 states and 601 transitions. [2023-11-26 10:43:18,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 325 transitions, 1857 flow [2023-11-26 10:43:18,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 325 transitions, 1712 flow, removed 67 selfloop flow, removed 2 redundant places. [2023-11-26 10:43:18,660 INFO L231 Difference]: Finished difference. Result has 102 places, 102 transitions, 640 flow [2023-11-26 10:43:18,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=640, PETRI_PLACES=102, PETRI_TRANSITIONS=102} [2023-11-26 10:43:18,663 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 58 predicate places. [2023-11-26 10:43:18,663 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 102 transitions, 640 flow [2023-11-26 10:43:18,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 10.565217391304348) internal successors, (243), 23 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:18,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:43:18,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:43:18,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 10:43:18,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:43:18,871 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-26 10:43:18,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:18,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1637431754, now seen corresponding path program 2 times [2023-11-26 10:43:18,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:18,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821245417] [2023-11-26 10:43:18,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:18,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:18,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:19,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:19,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:19,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821245417] [2023-11-26 10:43:19,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821245417] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:43:19,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815831230] [2023-11-26 10:43:19,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 10:43:19,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:43:19,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:43:19,437 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:43:19,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 10:43:19,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-26 10:43:19,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:43:19,545 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 10:43:19,546 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:43:19,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:43:19,645 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:43:19,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815831230] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:43:19,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 10:43:19,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 11 [2023-11-26 10:43:19,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336490326] [2023-11-26 10:43:19,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:43:19,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:43:19,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:19,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:43:19,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2023-11-26 10:43:19,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 45 [2023-11-26 10:43:19,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 102 transitions, 640 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 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) [2023-11-26 10:43:19,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:43:19,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 45 [2023-11-26 10:43:19,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:43:20,323 INFO L124 PetriNetUnfolderBase]: 1321/2952 cut-off events. [2023-11-26 10:43:20,323 INFO L125 PetriNetUnfolderBase]: For 12776/12864 co-relation queries the response was YES. [2023-11-26 10:43:20,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10009 conditions, 2952 events. 1321/2952 cut-off events. For 12776/12864 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 21541 event pairs, 175 based on Foata normal form. 90/3009 useless extension candidates. Maximal degree in co-relation 9978. Up to 1255 conditions per place. [2023-11-26 10:43:20,405 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 120 selfloop transitions, 31 changer transitions 0/164 dead transitions. [2023-11-26 10:43:20,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 164 transitions, 1318 flow [2023-11-26 10:43:20,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:43:20,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 10:43:20,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2023-11-26 10:43:20,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2023-11-26 10:43:20,408 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 144 transitions. [2023-11-26 10:43:20,408 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 144 transitions. [2023-11-26 10:43:20,408 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:43:20,408 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 144 transitions. [2023-11-26 10:43:20,409 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 24.0) internal successors, (144), 6 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:20,410 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 45.0) internal successors, (315), 7 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:20,410 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 45.0) internal successors, (315), 7 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:20,411 INFO L175 Difference]: Start difference. First operand has 102 places, 102 transitions, 640 flow. Second operand 6 states and 144 transitions. [2023-11-26 10:43:20,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 164 transitions, 1318 flow [2023-11-26 10:43:20,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 164 transitions, 1255 flow, removed 27 selfloop flow, removed 4 redundant places. [2023-11-26 10:43:20,511 INFO L231 Difference]: Finished difference. Result has 106 places, 114 transitions, 786 flow [2023-11-26 10:43:20,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=591, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=786, PETRI_PLACES=106, PETRI_TRANSITIONS=114} [2023-11-26 10:43:20,512 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 62 predicate places. [2023-11-26 10:43:20,512 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 114 transitions, 786 flow [2023-11-26 10:43:20,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 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) [2023-11-26 10:43:20,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:43:20,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:43:20,519 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-26 10:43:20,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:43:20,719 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-26 10:43:20,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:20,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1665263592, now seen corresponding path program 1 times [2023-11-26 10:43:20,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:20,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435306794] [2023-11-26 10:43:20,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:20,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:20,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:21,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:21,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:21,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435306794] [2023-11-26 10:43:21,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435306794] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:43:21,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347471097] [2023-11-26 10:43:21,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:21,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:43:21,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:43:21,219 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:43:21,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 10:43:21,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:21,325 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-26 10:43:21,329 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:43:21,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-26 10:43:21,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:21,617 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:43:22,076 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2023-11-26 10:43:22,088 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-26 10:43:22,088 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 41 [2023-11-26 10:43:22,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:22,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347471097] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:43:22,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:43:22,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2023-11-26 10:43:22,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721522172] [2023-11-26 10:43:22,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:43:22,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-26 10:43:22,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:22,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-26 10:43:22,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2023-11-26 10:43:22,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 45 [2023-11-26 10:43:22,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 114 transitions, 786 flow. Second operand has 23 states, 23 states have (on average 9.695652173913043) internal successors, (223), 23 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:22,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:43:22,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 45 [2023-11-26 10:43:22,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:43:24,694 INFO L124 PetriNetUnfolderBase]: 2133/4200 cut-off events. [2023-11-26 10:43:24,695 INFO L125 PetriNetUnfolderBase]: For 19200/19292 co-relation queries the response was YES. [2023-11-26 10:43:24,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15228 conditions, 4200 events. 2133/4200 cut-off events. For 19200/19292 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 29552 event pairs, 264 based on Foata normal form. 36/4235 useless extension candidates. Maximal degree in co-relation 15193. Up to 1689 conditions per place. [2023-11-26 10:43:24,743 INFO L140 encePairwiseOnDemand]: 32/45 looper letters, 179 selfloop transitions, 85 changer transitions 40/310 dead transitions. [2023-11-26 10:43:24,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 310 transitions, 2369 flow [2023-11-26 10:43:24,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-26 10:43:24,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-26 10:43:24,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 456 transitions. [2023-11-26 10:43:24,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37530864197530867 [2023-11-26 10:43:24,747 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 456 transitions. [2023-11-26 10:43:24,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 456 transitions. [2023-11-26 10:43:24,747 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:43:24,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 456 transitions. [2023-11-26 10:43:24,749 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 16.88888888888889) internal successors, (456), 27 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:24,752 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 45.0) internal successors, (1260), 28 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:24,753 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 45.0) internal successors, (1260), 28 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:24,753 INFO L175 Difference]: Start difference. First operand has 106 places, 114 transitions, 786 flow. Second operand 27 states and 456 transitions. [2023-11-26 10:43:24,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 310 transitions, 2369 flow [2023-11-26 10:43:24,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 310 transitions, 2356 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 10:43:24,851 INFO L231 Difference]: Finished difference. Result has 141 places, 144 transitions, 1383 flow [2023-11-26 10:43:24,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=775, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1383, PETRI_PLACES=141, PETRI_TRANSITIONS=144} [2023-11-26 10:43:24,853 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 97 predicate places. [2023-11-26 10:43:24,853 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 144 transitions, 1383 flow [2023-11-26 10:43:24,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 9.695652173913043) internal successors, (223), 23 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:24,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:43:24,854 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1] [2023-11-26 10:43:24,860 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 10:43:25,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:43:25,060 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-26 10:43:25,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:25,061 INFO L85 PathProgramCache]: Analyzing trace with hash -867024141, now seen corresponding path program 2 times [2023-11-26 10:43:25,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:25,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464322042] [2023-11-26 10:43:25,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:25,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:25,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:25,257 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:25,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:25,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464322042] [2023-11-26 10:43:25,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464322042] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:43:25,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960414526] [2023-11-26 10:43:25,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 10:43:25,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:43:25,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:43:25,260 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:43:25,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 10:43:25,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-26 10:43:25,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:43:25,366 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 10:43:25,367 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:43:25,409 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-26 10:43:25,410 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:43:25,441 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-26 10:43:25,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960414526] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:43:25,442 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:43:25,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 2, 2] total 12 [2023-11-26 10:43:25,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26898395] [2023-11-26 10:43:25,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:43:25,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-26 10:43:25,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:25,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-26 10:43:25,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-11-26 10:43:25,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 45 [2023-11-26 10:43:25,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 144 transitions, 1383 flow. Second operand has 14 states, 14 states have (on average 14.142857142857142) internal successors, (198), 14 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:25,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:43:25,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 45 [2023-11-26 10:43:25,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:43:26,271 INFO L124 PetriNetUnfolderBase]: 1300/3114 cut-off events. [2023-11-26 10:43:26,271 INFO L125 PetriNetUnfolderBase]: For 25899/25990 co-relation queries the response was YES. [2023-11-26 10:43:26,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13407 conditions, 3114 events. 1300/3114 cut-off events. For 25899/25990 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 24341 event pairs, 838 based on Foata normal form. 2/3058 useless extension candidates. Maximal degree in co-relation 13361. Up to 2226 conditions per place. [2023-11-26 10:43:26,320 INFO L140 encePairwiseOnDemand]: 40/45 looper letters, 105 selfloop transitions, 18 changer transitions 0/146 dead transitions. [2023-11-26 10:43:26,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 146 transitions, 1647 flow [2023-11-26 10:43:26,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-26 10:43:26,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-26 10:43:26,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 219 transitions. [2023-11-26 10:43:26,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3476190476190476 [2023-11-26 10:43:26,324 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 219 transitions. [2023-11-26 10:43:26,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 219 transitions. [2023-11-26 10:43:26,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:43:26,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 219 transitions. [2023-11-26 10:43:26,328 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 15.642857142857142) internal successors, (219), 14 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:26,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 45.0) internal successors, (675), 15 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:26,330 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 45.0) internal successors, (675), 15 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:26,330 INFO L175 Difference]: Start difference. First operand has 141 places, 144 transitions, 1383 flow. Second operand 14 states and 219 transitions. [2023-11-26 10:43:26,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 146 transitions, 1647 flow [2023-11-26 10:43:26,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 146 transitions, 1526 flow, removed 48 selfloop flow, removed 13 redundant places. [2023-11-26 10:43:26,485 INFO L231 Difference]: Finished difference. Result has 135 places, 146 transitions, 1316 flow [2023-11-26 10:43:26,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1254, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1316, PETRI_PLACES=135, PETRI_TRANSITIONS=146} [2023-11-26 10:43:26,485 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 91 predicate places. [2023-11-26 10:43:26,486 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 146 transitions, 1316 flow [2023-11-26 10:43:26,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 14.142857142857142) internal successors, (198), 14 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:26,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:43:26,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:43:26,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 10:43:26,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-26 10:43:26,687 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-26 10:43:26,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:26,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1635123890, now seen corresponding path program 1 times [2023-11-26 10:43:26,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:26,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224479074] [2023-11-26 10:43:26,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:26,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:26,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:27,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:27,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:27,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224479074] [2023-11-26 10:43:27,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224479074] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:43:27,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192575943] [2023-11-26 10:43:27,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:27,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:43:27,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:43:27,139 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:43:27,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 10:43:27,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:27,258 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-26 10:43:27,260 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:43:27,295 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-26 10:43:27,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:27,561 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:43:27,984 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2023-11-26 10:43:28,004 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-26 10:43:28,005 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 37 [2023-11-26 10:43:28,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:28,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192575943] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:43:28,074 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:43:28,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2023-11-26 10:43:28,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248816331] [2023-11-26 10:43:28,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:43:28,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-26 10:43:28,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:28,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-26 10:43:28,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2023-11-26 10:43:28,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2023-11-26 10:43:28,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 146 transitions, 1316 flow. Second operand has 23 states, 23 states have (on average 11.565217391304348) internal successors, (266), 23 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:28,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:43:28,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2023-11-26 10:43:28,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:43:30,808 INFO L124 PetriNetUnfolderBase]: 2307/4941 cut-off events. [2023-11-26 10:43:30,809 INFO L125 PetriNetUnfolderBase]: For 39143/39336 co-relation queries the response was YES. [2023-11-26 10:43:30,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20536 conditions, 4941 events. 2307/4941 cut-off events. For 39143/39336 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 37653 event pairs, 223 based on Foata normal form. 104/5032 useless extension candidates. Maximal degree in co-relation 20495. Up to 1042 conditions per place. [2023-11-26 10:43:30,962 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 261 selfloop transitions, 119 changer transitions 0/400 dead transitions. [2023-11-26 10:43:30,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 400 transitions, 4065 flow [2023-11-26 10:43:30,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-26 10:43:30,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-26 10:43:30,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 553 transitions. [2023-11-26 10:43:30,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42375478927203064 [2023-11-26 10:43:30,966 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 553 transitions. [2023-11-26 10:43:30,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 553 transitions. [2023-11-26 10:43:30,967 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:43:30,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 553 transitions. [2023-11-26 10:43:30,969 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 19.06896551724138) internal successors, (553), 29 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:30,973 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 45.0) internal successors, (1350), 30 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:30,973 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 45.0) internal successors, (1350), 30 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:30,974 INFO L175 Difference]: Start difference. First operand has 135 places, 146 transitions, 1316 flow. Second operand 29 states and 553 transitions. [2023-11-26 10:43:30,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 400 transitions, 4065 flow [2023-11-26 10:43:31,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 400 transitions, 3905 flow, removed 44 selfloop flow, removed 14 redundant places. [2023-11-26 10:43:31,177 INFO L231 Difference]: Finished difference. Result has 163 places, 194 transitions, 2428 flow [2023-11-26 10:43:31,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1202, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=2428, PETRI_PLACES=163, PETRI_TRANSITIONS=194} [2023-11-26 10:43:31,178 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 119 predicate places. [2023-11-26 10:43:31,178 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 194 transitions, 2428 flow [2023-11-26 10:43:31,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 11.565217391304348) internal successors, (266), 23 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:31,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:43:31,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:43:31,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 10:43:31,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:43:31,391 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-26 10:43:31,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:31,391 INFO L85 PathProgramCache]: Analyzing trace with hash 284653638, now seen corresponding path program 1 times [2023-11-26 10:43:31,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:31,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127073986] [2023-11-26 10:43:31,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:31,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:31,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:31,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:31,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:31,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127073986] [2023-11-26 10:43:31,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127073986] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:43:31,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170986926] [2023-11-26 10:43:31,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:31,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:43:31,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:43:31,865 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:43:31,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 10:43:31,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:31,975 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-26 10:43:31,977 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:43:32,018 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-26 10:43:32,391 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-26 10:43:32,391 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2023-11-26 10:43:32,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:32,432 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:43:32,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-11-26 10:43:32,784 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2023-11-26 10:43:32,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:32,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170986926] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:43:32,885 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:43:32,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2023-11-26 10:43:32,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362826804] [2023-11-26 10:43:32,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:43:32,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-26 10:43:32,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:32,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-26 10:43:32,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2023-11-26 10:43:33,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 45 [2023-11-26 10:43:33,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 194 transitions, 2428 flow. Second operand has 23 states, 23 states have (on average 10.695652173913043) internal successors, (246), 23 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:33,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:43:33,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 45 [2023-11-26 10:43:33,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:43:37,015 INFO L124 PetriNetUnfolderBase]: 2670/5447 cut-off events. [2023-11-26 10:43:37,015 INFO L125 PetriNetUnfolderBase]: For 92745/92931 co-relation queries the response was YES. [2023-11-26 10:43:37,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27584 conditions, 5447 events. 2670/5447 cut-off events. For 92745/92931 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 40565 event pairs, 540 based on Foata normal form. 38/5478 useless extension candidates. Maximal degree in co-relation 27529. Up to 2562 conditions per place. [2023-11-26 10:43:37,083 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 242 selfloop transitions, 89 changer transitions 16/364 dead transitions. [2023-11-26 10:43:37,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 364 transitions, 4509 flow [2023-11-26 10:43:37,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-26 10:43:37,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-26 10:43:37,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 474 transitions. [2023-11-26 10:43:37,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3761904761904762 [2023-11-26 10:43:37,087 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 474 transitions. [2023-11-26 10:43:37,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 474 transitions. [2023-11-26 10:43:37,087 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:43:37,088 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 474 transitions. [2023-11-26 10:43:37,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 16.928571428571427) internal successors, (474), 28 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:37,092 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 45.0) internal successors, (1305), 29 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:37,093 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 45.0) internal successors, (1305), 29 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:37,093 INFO L175 Difference]: Start difference. First operand has 163 places, 194 transitions, 2428 flow. Second operand 28 states and 474 transitions. [2023-11-26 10:43:37,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 364 transitions, 4509 flow [2023-11-26 10:43:37,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 364 transitions, 4098 flow, removed 192 selfloop flow, removed 8 redundant places. [2023-11-26 10:43:37,649 INFO L231 Difference]: Finished difference. Result has 184 places, 194 transitions, 2315 flow [2023-11-26 10:43:37,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2013, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=2315, PETRI_PLACES=184, PETRI_TRANSITIONS=194} [2023-11-26 10:43:37,651 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 140 predicate places. [2023-11-26 10:43:37,651 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 194 transitions, 2315 flow [2023-11-26 10:43:37,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 10.695652173913043) internal successors, (246), 23 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:37,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:43:37,652 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:43:37,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-26 10:43:37,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-26 10:43:37,858 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-26 10:43:37,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:37,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1620500969, now seen corresponding path program 1 times [2023-11-26 10:43:37,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:37,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998796241] [2023-11-26 10:43:37,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:37,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:37,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:37,996 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:37,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:37,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998796241] [2023-11-26 10:43:37,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998796241] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:43:37,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915603096] [2023-11-26 10:43:37,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:37,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:43:37,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:43:37,999 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:43:38,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 10:43:38,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:38,113 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-26 10:43:38,114 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:43:38,199 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:38,199 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:43:38,295 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:38,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915603096] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:43:38,295 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:43:38,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2023-11-26 10:43:38,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363753574] [2023-11-26 10:43:38,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:43:38,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-26 10:43:38,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:38,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-26 10:43:38,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-11-26 10:43:38,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 45 [2023-11-26 10:43:38,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 194 transitions, 2315 flow. Second operand has 15 states, 15 states have (on average 14.8) internal successors, (222), 15 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:38,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:43:38,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 45 [2023-11-26 10:43:38,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:43:38,874 INFO L124 PetriNetUnfolderBase]: 851/2086 cut-off events. [2023-11-26 10:43:38,874 INFO L125 PetriNetUnfolderBase]: For 34259/34319 co-relation queries the response was YES. [2023-11-26 10:43:38,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10715 conditions, 2086 events. 851/2086 cut-off events. For 34259/34319 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 15253 event pairs, 539 based on Foata normal form. 108/2142 useless extension candidates. Maximal degree in co-relation 10658. Up to 1140 conditions per place. [2023-11-26 10:43:38,896 INFO L140 encePairwiseOnDemand]: 39/45 looper letters, 80 selfloop transitions, 15 changer transitions 2/117 dead transitions. [2023-11-26 10:43:38,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 117 transitions, 1363 flow [2023-11-26 10:43:38,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 10:43:38,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-26 10:43:38,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2023-11-26 10:43:38,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2023-11-26 10:43:38,899 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 150 transitions. [2023-11-26 10:43:38,899 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 150 transitions. [2023-11-26 10:43:38,900 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:43:38,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 150 transitions. [2023-11-26 10:43:38,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:38,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 45.0) internal successors, (405), 9 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:38,902 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 45.0) internal successors, (405), 9 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:38,902 INFO L175 Difference]: Start difference. First operand has 184 places, 194 transitions, 2315 flow. Second operand 8 states and 150 transitions. [2023-11-26 10:43:38,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 117 transitions, 1363 flow [2023-11-26 10:43:39,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 117 transitions, 1157 flow, removed 52 selfloop flow, removed 36 redundant places. [2023-11-26 10:43:39,048 INFO L231 Difference]: Finished difference. Result has 126 places, 103 transitions, 936 flow [2023-11-26 10:43:39,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=906, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=936, PETRI_PLACES=126, PETRI_TRANSITIONS=103} [2023-11-26 10:43:39,049 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 82 predicate places. [2023-11-26 10:43:39,050 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 103 transitions, 936 flow [2023-11-26 10:43:39,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 14.8) internal successors, (222), 15 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:39,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:43:39,050 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:43:39,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-26 10:43:39,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-26 10:43:39,255 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-26 10:43:39,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:39,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1389761115, now seen corresponding path program 2 times [2023-11-26 10:43:39,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:39,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676458923] [2023-11-26 10:43:39,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:39,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:39,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:39,351 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-26 10:43:39,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:39,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676458923] [2023-11-26 10:43:39,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676458923] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:43:39,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302663590] [2023-11-26 10:43:39,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 10:43:39,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:43:39,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:43:39,353 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:43:39,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-26 10:43:39,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 10:43:39,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:43:39,475 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 10:43:39,477 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:43:39,507 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-26 10:43:39,508 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:43:39,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302663590] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:43:39,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 10:43:39,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2023-11-26 10:43:39,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105697252] [2023-11-26 10:43:39,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:43:39,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:43:39,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:39,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:43:39,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:43:39,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2023-11-26 10:43:39,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 103 transitions, 936 flow. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:39,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:43:39,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2023-11-26 10:43:39,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:43:39,939 INFO L124 PetriNetUnfolderBase]: 1078/2220 cut-off events. [2023-11-26 10:43:39,939 INFO L125 PetriNetUnfolderBase]: For 18476/18559 co-relation queries the response was YES. [2023-11-26 10:43:39,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10053 conditions, 2220 events. 1078/2220 cut-off events. For 18476/18559 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 14791 event pairs, 264 based on Foata normal form. 83/2249 useless extension candidates. Maximal degree in co-relation 10012. Up to 703 conditions per place. [2023-11-26 10:43:39,954 INFO L140 encePairwiseOnDemand]: 40/45 looper letters, 142 selfloop transitions, 7 changer transitions 1/167 dead transitions. [2023-11-26 10:43:39,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 167 transitions, 1949 flow [2023-11-26 10:43:39,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:43:39,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 10:43:39,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 86 transitions. [2023-11-26 10:43:39,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4777777777777778 [2023-11-26 10:43:39,956 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 86 transitions. [2023-11-26 10:43:39,956 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 86 transitions. [2023-11-26 10:43:39,956 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:43:39,956 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 86 transitions. [2023-11-26 10:43:39,956 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:39,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 45.0) internal successors, (225), 5 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:39,957 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 45.0) internal successors, (225), 5 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:39,957 INFO L175 Difference]: Start difference. First operand has 126 places, 103 transitions, 936 flow. Second operand 4 states and 86 transitions. [2023-11-26 10:43:39,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 167 transitions, 1949 flow [2023-11-26 10:43:39,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 167 transitions, 1921 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-26 10:43:39,999 INFO L231 Difference]: Finished difference. Result has 122 places, 102 transitions, 918 flow [2023-11-26 10:43:39,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=904, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=918, PETRI_PLACES=122, PETRI_TRANSITIONS=102} [2023-11-26 10:43:40,000 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 78 predicate places. [2023-11-26 10:43:40,000 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 102 transitions, 918 flow [2023-11-26 10:43:40,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:40,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:43:40,001 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:43:40,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-26 10:43:40,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-26 10:43:40,203 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-26 10:43:40,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:40,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1960786886, now seen corresponding path program 2 times [2023-11-26 10:43:40,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:40,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702242800] [2023-11-26 10:43:40,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:40,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:40,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:41,042 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:41,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:41,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702242800] [2023-11-26 10:43:41,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702242800] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:43:41,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333934160] [2023-11-26 10:43:41,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 10:43:41,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:43:41,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:43:41,045 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:43:41,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-26 10:43:41,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-26 10:43:41,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:43:41,165 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 10:43:41,167 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:43:41,276 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-26 10:43:41,276 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:43:41,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333934160] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:43:41,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 10:43:41,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 13 [2023-11-26 10:43:41,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87104457] [2023-11-26 10:43:41,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:43:41,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:43:41,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:41,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:43:41,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2023-11-26 10:43:41,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 45 [2023-11-26 10:43:41,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 102 transitions, 918 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:41,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:43:41,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 45 [2023-11-26 10:43:41,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:43:41,718 INFO L124 PetriNetUnfolderBase]: 1026/2323 cut-off events. [2023-11-26 10:43:41,718 INFO L125 PetriNetUnfolderBase]: For 18419/18431 co-relation queries the response was YES. [2023-11-26 10:43:41,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10448 conditions, 2323 events. 1026/2323 cut-off events. For 18419/18431 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 16390 event pairs, 366 based on Foata normal form. 6/2290 useless extension candidates. Maximal degree in co-relation 10408. Up to 1507 conditions per place. [2023-11-26 10:43:41,734 INFO L140 encePairwiseOnDemand]: 39/45 looper letters, 86 selfloop transitions, 21 changer transitions 2/126 dead transitions. [2023-11-26 10:43:41,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 126 transitions, 1246 flow [2023-11-26 10:43:41,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:43:41,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 10:43:41,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 130 transitions. [2023-11-26 10:43:41,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2023-11-26 10:43:41,735 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 130 transitions. [2023-11-26 10:43:41,735 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 130 transitions. [2023-11-26 10:43:41,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:43:41,735 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 130 transitions. [2023-11-26 10:43:41,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:41,737 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 45.0) internal successors, (315), 7 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:41,737 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 45.0) internal successors, (315), 7 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:41,737 INFO L175 Difference]: Start difference. First operand has 122 places, 102 transitions, 918 flow. Second operand 6 states and 130 transitions. [2023-11-26 10:43:41,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 126 transitions, 1246 flow [2023-11-26 10:43:41,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 126 transitions, 1232 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-26 10:43:41,780 INFO L231 Difference]: Finished difference. Result has 126 places, 106 transitions, 1016 flow [2023-11-26 10:43:41,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=904, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1016, PETRI_PLACES=126, PETRI_TRANSITIONS=106} [2023-11-26 10:43:41,781 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 82 predicate places. [2023-11-26 10:43:41,781 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 106 transitions, 1016 flow [2023-11-26 10:43:41,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:41,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:43:41,782 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-26 10:43:41,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-26 10:43:41,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-26 10:43:41,983 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-26 10:43:41,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:41,983 INFO L85 PathProgramCache]: Analyzing trace with hash -132921028, now seen corresponding path program 1 times [2023-11-26 10:43:41,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:41,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769038644] [2023-11-26 10:43:41,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:41,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:42,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:42,071 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-26 10:43:42,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:42,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769038644] [2023-11-26 10:43:42,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769038644] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:43:42,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173277838] [2023-11-26 10:43:42,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:42,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:43:42,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:43:42,074 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:43:42,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-26 10:43:42,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:42,190 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 10:43:42,191 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:43:42,219 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-26 10:43:42,219 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:43:42,278 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-26 10:43:42,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173277838] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:43:42,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:43:42,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-26 10:43:42,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229123434] [2023-11-26 10:43:42,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:43:42,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-26 10:43:42,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:42,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-26 10:43:42,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-26 10:43:42,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 45 [2023-11-26 10:43:42,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 106 transitions, 1016 flow. Second operand has 12 states, 12 states have (on average 14.916666666666666) internal successors, (179), 12 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:42,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:43:42,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 45 [2023-11-26 10:43:42,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:43:42,982 INFO L124 PetriNetUnfolderBase]: 1631/3463 cut-off events. [2023-11-26 10:43:42,982 INFO L125 PetriNetUnfolderBase]: For 38584/38893 co-relation queries the response was YES. [2023-11-26 10:43:42,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16235 conditions, 3463 events. 1631/3463 cut-off events. For 38584/38893 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 23451 event pairs, 347 based on Foata normal form. 92/3452 useless extension candidates. Maximal degree in co-relation 16192. Up to 1359 conditions per place. [2023-11-26 10:43:43,008 INFO L140 encePairwiseOnDemand]: 40/45 looper letters, 282 selfloop transitions, 13 changer transitions 0/313 dead transitions. [2023-11-26 10:43:43,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 313 transitions, 3843 flow [2023-11-26 10:43:43,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 10:43:43,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-26 10:43:43,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 227 transitions. [2023-11-26 10:43:43,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5044444444444445 [2023-11-26 10:43:43,010 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 227 transitions. [2023-11-26 10:43:43,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 227 transitions. [2023-11-26 10:43:43,010 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:43:43,010 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 227 transitions. [2023-11-26 10:43:43,011 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 22.7) internal successors, (227), 10 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:43,012 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 45.0) internal successors, (495), 11 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:43,013 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 45.0) internal successors, (495), 11 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:43,013 INFO L175 Difference]: Start difference. First operand has 126 places, 106 transitions, 1016 flow. Second operand 10 states and 227 transitions. [2023-11-26 10:43:43,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 313 transitions, 3843 flow [2023-11-26 10:43:43,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 313 transitions, 3786 flow, removed 23 selfloop flow, removed 1 redundant places. [2023-11-26 10:43:43,075 INFO L231 Difference]: Finished difference. Result has 137 places, 115 transitions, 1055 flow [2023-11-26 10:43:43,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=975, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1055, PETRI_PLACES=137, PETRI_TRANSITIONS=115} [2023-11-26 10:43:43,076 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 93 predicate places. [2023-11-26 10:43:43,076 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 115 transitions, 1055 flow [2023-11-26 10:43:43,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 14.916666666666666) internal successors, (179), 12 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:43,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:43:43,076 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:43:43,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-26 10:43:43,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-26 10:43:43,277 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-26 10:43:43,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:43,277 INFO L85 PathProgramCache]: Analyzing trace with hash 511270662, now seen corresponding path program 1 times [2023-11-26 10:43:43,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:43,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226361528] [2023-11-26 10:43:43,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:43,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:43,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:43,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:43,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:43,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226361528] [2023-11-26 10:43:43,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226361528] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:43:43,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27848377] [2023-11-26 10:43:43,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:43,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:43:43,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:43:43,420 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:43:43,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-26 10:43:43,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:43,537 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 10:43:43,540 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:43:43,586 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:43:43,586 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:43:43,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27848377] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:43:43,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 10:43:43,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2023-11-26 10:43:43,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459086824] [2023-11-26 10:43:43,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:43:43,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:43:43,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:43,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:43:43,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:43:43,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 45 [2023-11-26 10:43:43,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 115 transitions, 1055 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:43,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:43:43,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 45 [2023-11-26 10:43:43,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:43:44,208 INFO L124 PetriNetUnfolderBase]: 1940/4418 cut-off events. [2023-11-26 10:43:44,208 INFO L125 PetriNetUnfolderBase]: For 53365/53507 co-relation queries the response was YES. [2023-11-26 10:43:44,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22218 conditions, 4418 events. 1940/4418 cut-off events. For 53365/53507 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 31320 event pairs, 393 based on Foata normal form. 112/4505 useless extension candidates. Maximal degree in co-relation 22172. Up to 1766 conditions per place. [2023-11-26 10:43:44,241 INFO L140 encePairwiseOnDemand]: 41/45 looper letters, 111 selfloop transitions, 24 changer transitions 19/165 dead transitions. [2023-11-26 10:43:44,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 165 transitions, 1758 flow [2023-11-26 10:43:44,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:43:44,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 10:43:44,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 111 transitions. [2023-11-26 10:43:44,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2023-11-26 10:43:44,243 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 111 transitions. [2023-11-26 10:43:44,243 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 111 transitions. [2023-11-26 10:43:44,243 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:43:44,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 111 transitions. [2023-11-26 10:43:44,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:44,244 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 45.0) internal successors, (225), 5 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:44,245 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 45.0) internal successors, (225), 5 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:44,245 INFO L175 Difference]: Start difference. First operand has 137 places, 115 transitions, 1055 flow. Second operand 4 states and 111 transitions. [2023-11-26 10:43:44,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 165 transitions, 1758 flow [2023-11-26 10:43:44,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 165 transitions, 1600 flow, removed 67 selfloop flow, removed 10 redundant places. [2023-11-26 10:43:44,303 INFO L231 Difference]: Finished difference. Result has 126 places, 98 transitions, 956 flow [2023-11-26 10:43:44,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=845, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=956, PETRI_PLACES=126, PETRI_TRANSITIONS=98} [2023-11-26 10:43:44,304 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 82 predicate places. [2023-11-26 10:43:44,304 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 98 transitions, 956 flow [2023-11-26 10:43:44,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:44,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:43:44,304 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:43:44,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-26 10:43:44,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-26 10:43:44,505 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-26 10:43:44,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:44,505 INFO L85 PathProgramCache]: Analyzing trace with hash -220038074, now seen corresponding path program 2 times [2023-11-26 10:43:44,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:44,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639228229] [2023-11-26 10:43:44,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:44,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:44,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:45,837 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:45,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:45,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639228229] [2023-11-26 10:43:45,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639228229] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:43:45,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069837178] [2023-11-26 10:43:45,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 10:43:45,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:43:45,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:43:45,840 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:43:45,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-26 10:43:45,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-26 10:43:45,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:43:45,966 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 10:43:45,967 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:43:46,087 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-26 10:43:46,087 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:43:46,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069837178] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:43:46,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 10:43:46,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11] total 15 [2023-11-26 10:43:46,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63107386] [2023-11-26 10:43:46,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:43:46,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:43:46,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:46,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:43:46,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2023-11-26 10:43:46,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 45 [2023-11-26 10:43:46,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 98 transitions, 956 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:46,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:43:46,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 45 [2023-11-26 10:43:46,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:43:46,925 INFO L124 PetriNetUnfolderBase]: 2107/4476 cut-off events. [2023-11-26 10:43:46,925 INFO L125 PetriNetUnfolderBase]: For 38461/38622 co-relation queries the response was YES. [2023-11-26 10:43:46,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20665 conditions, 4476 events. 2107/4476 cut-off events. For 38461/38622 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 30169 event pairs, 663 based on Foata normal form. 54/4500 useless extension candidates. Maximal degree in co-relation 20621. Up to 3253 conditions per place. [2023-11-26 10:43:46,956 INFO L140 encePairwiseOnDemand]: 40/45 looper letters, 89 selfloop transitions, 9 changer transitions 7/114 dead transitions. [2023-11-26 10:43:46,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 114 transitions, 1217 flow [2023-11-26 10:43:46,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:43:46,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 10:43:46,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 111 transitions. [2023-11-26 10:43:46,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49333333333333335 [2023-11-26 10:43:46,958 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 111 transitions. [2023-11-26 10:43:46,958 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 111 transitions. [2023-11-26 10:43:46,958 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:43:46,958 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 111 transitions. [2023-11-26 10:43:46,959 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 22.2) internal successors, (111), 5 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:46,960 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 45.0) internal successors, (270), 6 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:46,960 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 45.0) internal successors, (270), 6 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:46,960 INFO L175 Difference]: Start difference. First operand has 126 places, 98 transitions, 956 flow. Second operand 5 states and 111 transitions. [2023-11-26 10:43:46,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 114 transitions, 1217 flow [2023-11-26 10:43:47,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 114 transitions, 1075 flow, removed 47 selfloop flow, removed 11 redundant places. [2023-11-26 10:43:47,024 INFO L231 Difference]: Finished difference. Result has 105 places, 96 transitions, 824 flow [2023-11-26 10:43:47,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=818, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=824, PETRI_PLACES=105, PETRI_TRANSITIONS=96} [2023-11-26 10:43:47,025 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 61 predicate places. [2023-11-26 10:43:47,025 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 96 transitions, 824 flow [2023-11-26 10:43:47,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:47,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:43:47,025 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:43:47,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-26 10:43:47,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:43:47,227 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-26 10:43:47,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:47,227 INFO L85 PathProgramCache]: Analyzing trace with hash -245419362, now seen corresponding path program 3 times [2023-11-26 10:43:47,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:47,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312803589] [2023-11-26 10:43:47,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:47,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:47,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:48,207 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:48,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:48,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312803589] [2023-11-26 10:43:48,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312803589] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:43:48,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644609162] [2023-11-26 10:43:48,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 10:43:48,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:43:48,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:43:48,210 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:43:48,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-26 10:43:48,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-26 10:43:48,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:43:48,339 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-26 10:43:48,340 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:43:48,460 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-26 10:43:48,461 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:43:48,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644609162] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:43:48,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 10:43:48,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11] total 15 [2023-11-26 10:43:48,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182415915] [2023-11-26 10:43:48,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:43:48,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:43:48,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:48,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:43:48,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2023-11-26 10:43:48,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 45 [2023-11-26 10:43:48,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 96 transitions, 824 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 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) [2023-11-26 10:43:48,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:43:48,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 45 [2023-11-26 10:43:48,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:43:49,241 INFO L124 PetriNetUnfolderBase]: 2121/4615 cut-off events. [2023-11-26 10:43:49,241 INFO L125 PetriNetUnfolderBase]: For 24110/24235 co-relation queries the response was YES. [2023-11-26 10:43:49,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18438 conditions, 4615 events. 2121/4615 cut-off events. For 24110/24235 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 31723 event pairs, 465 based on Foata normal form. 146/4746 useless extension candidates. Maximal degree in co-relation 18399. Up to 1299 conditions per place. [2023-11-26 10:43:49,278 INFO L140 encePairwiseOnDemand]: 39/45 looper letters, 112 selfloop transitions, 24 changer transitions 2/147 dead transitions. [2023-11-26 10:43:49,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 147 transitions, 1405 flow [2023-11-26 10:43:49,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:43:49,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 10:43:49,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2023-11-26 10:43:49,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2023-11-26 10:43:49,281 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 120 transitions. [2023-11-26 10:43:49,281 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 120 transitions. [2023-11-26 10:43:49,281 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:43:49,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 120 transitions. [2023-11-26 10:43:49,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 24.0) internal successors, (120), 5 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:49,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 45.0) internal successors, (270), 6 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:49,283 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 45.0) internal successors, (270), 6 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:49,283 INFO L175 Difference]: Start difference. First operand has 105 places, 96 transitions, 824 flow. Second operand 5 states and 120 transitions. [2023-11-26 10:43:49,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 147 transitions, 1405 flow [2023-11-26 10:43:49,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 147 transitions, 1385 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-11-26 10:43:49,334 INFO L231 Difference]: Finished difference. Result has 104 places, 98 transitions, 903 flow [2023-11-26 10:43:49,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=804, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=903, PETRI_PLACES=104, PETRI_TRANSITIONS=98} [2023-11-26 10:43:49,335 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 60 predicate places. [2023-11-26 10:43:49,335 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 98 transitions, 903 flow [2023-11-26 10:43:49,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 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) [2023-11-26 10:43:49,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:43:49,335 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:43:49,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-26 10:43:49,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:43:49,536 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-26 10:43:49,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:49,536 INFO L85 PathProgramCache]: Analyzing trace with hash 981934958, now seen corresponding path program 2 times [2023-11-26 10:43:49,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:49,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713414524] [2023-11-26 10:43:49,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:49,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:49,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:50,564 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:50,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:50,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713414524] [2023-11-26 10:43:50,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713414524] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:43:50,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391629675] [2023-11-26 10:43:50,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 10:43:50,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:43:50,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:43:50,567 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:43:50,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10826d5d-3544-40ac-b194-b8fbbaefaa24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process