./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB --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 8c3fe688d0e9a9929009fc24c8ef56c8fc1bfa15613131b287e178eb7d2f1f1e --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-27 23:28:02,769 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-27 23:28:02,872 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Overflow-32bit-Automizer_Default.epf [2024-11-27 23:28:02,881 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-27 23:28:02,881 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-27 23:28:02,914 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-27 23:28:02,915 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-27 23:28:02,915 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-27 23:28:02,916 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-27 23:28:02,916 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-27 23:28:02,916 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-27 23:28:02,916 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-27 23:28:02,917 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-27 23:28:02,917 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-27 23:28:02,917 INFO L153 SettingsManager]: * Use SBE=true [2024-11-27 23:28:02,917 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-27 23:28:02,917 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-27 23:28:02,917 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-27 23:28:02,917 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-27 23:28:02,918 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-27 23:28:02,918 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-27 23:28:02,918 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-27 23:28:02,918 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-27 23:28:02,918 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-27 23:28:02,918 INFO L153 SettingsManager]: * Check absence of signed integer overflows=ASSERTandASSUME [2024-11-27 23:28:02,918 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-27 23:28:02,919 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-27 23:28:02,919 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-27 23:28:02,919 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-27 23:28:02,919 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-27 23:28:02,919 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-27 23:28:02,919 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 23:28:02,920 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 23:28:02,920 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 23:28:02,920 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 23:28:02,920 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-27 23:28:02,920 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 23:28:02,920 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 23:28:02,920 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 23:28:02,920 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 23:28:02,921 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-27 23:28:02,921 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-27 23:28:02,921 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-27 23:28:02,921 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-27 23:28:02,921 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-27 23:28:02,921 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-27 23:28:02,921 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-27 23:28:02,922 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-27 23:28:02,922 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-27 23:28:02,922 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-27 23:28:02,922 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB 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 -> 8c3fe688d0e9a9929009fc24c8ef56c8fc1bfa15613131b287e178eb7d2f1f1e [2024-11-27 23:28:03,183 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-27 23:28:03,192 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-27 23:28:03,195 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-27 23:28:03,196 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-27 23:28:03,196 INFO L274 PluginConnector]: CDTParser initialized [2024-11-27 23:28:03,198 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c [2024-11-27 23:28:06,091 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/data/592f8eb42/0576dce2e3a04eaf95b2ae23ace5e7f5/FLAGc69f3943f [2024-11-27 23:28:06,440 INFO L384 CDTParser]: Found 1 translation units. [2024-11-27 23:28:06,441 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c [2024-11-27 23:28:06,449 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/data/592f8eb42/0576dce2e3a04eaf95b2ae23ace5e7f5/FLAGc69f3943f [2024-11-27 23:28:06,680 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/data/592f8eb42/0576dce2e3a04eaf95b2ae23ace5e7f5 [2024-11-27 23:28:06,683 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-27 23:28:06,685 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-27 23:28:06,688 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-27 23:28:06,688 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-27 23:28:06,696 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-27 23:28:06,697 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 11:28:06" (1/1) ... [2024-11-27 23:28:06,698 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@572b611 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:28:06, skipping insertion in model container [2024-11-27 23:28:06,698 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 11:28:06" (1/1) ... [2024-11-27 23:28:06,720 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-27 23:28:06,958 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 23:28:06,971 INFO L200 MainTranslator]: Completed pre-run [2024-11-27 23:28:07,009 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 23:28:07,029 INFO L204 MainTranslator]: Completed translation [2024-11-27 23:28:07,029 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:28:07 WrapperNode [2024-11-27 23:28:07,029 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-27 23:28:07,030 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-27 23:28:07,030 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-27 23:28:07,031 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-27 23:28:07,042 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:28:07" (1/1) ... [2024-11-27 23:28:07,051 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:28:07" (1/1) ... [2024-11-27 23:28:07,084 INFO L138 Inliner]: procedures = 23, calls = 30, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 160 [2024-11-27 23:28:07,084 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-27 23:28:07,084 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-27 23:28:07,084 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-27 23:28:07,085 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-27 23:28:07,095 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:28:07" (1/1) ... [2024-11-27 23:28:07,096 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:28:07" (1/1) ... [2024-11-27 23:28:07,103 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:28:07" (1/1) ... [2024-11-27 23:28:07,126 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-27 23:28:07,126 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:28:07" (1/1) ... [2024-11-27 23:28:07,127 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:28:07" (1/1) ... [2024-11-27 23:28:07,141 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:28:07" (1/1) ... [2024-11-27 23:28:07,142 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:28:07" (1/1) ... [2024-11-27 23:28:07,149 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:28:07" (1/1) ... [2024-11-27 23:28:07,150 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:28:07" (1/1) ... [2024-11-27 23:28:07,155 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:28:07" (1/1) ... [2024-11-27 23:28:07,157 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-27 23:28:07,162 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-27 23:28:07,162 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-27 23:28:07,162 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-27 23:28:07,163 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:28:07" (1/1) ... [2024-11-27 23:28:07,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 23:28:07,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:28:07,207 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-27 23:28:07,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-27 23:28:07,236 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-27 23:28:07,236 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-27 23:28:07,236 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-27 23:28:07,236 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-27 23:28:07,236 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-27 23:28:07,236 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-27 23:28:07,236 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-27 23:28:07,237 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-27 23:28:07,237 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-27 23:28:07,237 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-27 23:28:07,237 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-27 23:28:07,237 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-27 23:28:07,237 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-27 23:28:07,237 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-27 23:28:07,237 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-27 23:28:07,237 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-27 23:28:07,238 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-27 23:28:07,356 INFO L234 CfgBuilder]: Building ICFG [2024-11-27 23:28:07,359 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-27 23:28:07,674 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-27 23:28:07,674 INFO L283 CfgBuilder]: Performing block encoding [2024-11-27 23:28:07,951 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-27 23:28:07,953 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-27 23:28:07,953 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:28:07 BoogieIcfgContainer [2024-11-27 23:28:07,953 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-27 23:28:07,957 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-27 23:28:07,957 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-27 23:28:07,962 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-27 23:28:07,962 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 11:28:06" (1/3) ... [2024-11-27 23:28:07,963 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4874c5cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 11:28:07, skipping insertion in model container [2024-11-27 23:28:07,963 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:28:07" (2/3) ... [2024-11-27 23:28:07,964 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4874c5cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 11:28:07, skipping insertion in model container [2024-11-27 23:28:07,964 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:28:07" (3/3) ... [2024-11-27 23:28:07,965 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-queue-add-2.wvr.c [2024-11-27 23:28:07,980 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-27 23:28:07,982 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-queue-add-2.wvr.c that has 3 procedures, 40 locations, 1 initial locations, 3 loop locations, and 12 error locations. [2024-11-27 23:28:07,982 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-27 23:28:08,057 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-27 23:28:08,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 46 places, 44 transitions, 102 flow [2024-11-27 23:28:08,139 INFO L124 PetriNetUnfolderBase]: 5/42 cut-off events. [2024-11-27 23:28:08,144 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-27 23:28:08,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 42 events. 5/42 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 118 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 33. Up to 3 conditions per place. [2024-11-27 23:28:08,176 INFO L82 GeneralOperation]: Start removeDead. Operand has 46 places, 44 transitions, 102 flow [2024-11-27 23:28:08,180 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 40 transitions, 89 flow [2024-11-27 23:28:08,193 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-27 23:28:08,211 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@45f60c13, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-27 23:28:08,212 INFO L334 AbstractCegarLoop]: Starting to check reachability of 24 error locations. [2024-11-27 23:28:08,217 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-27 23:28:08,219 INFO L124 PetriNetUnfolderBase]: 0/3 cut-off events. [2024-11-27 23:28:08,219 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-27 23:28:08,219 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:28:08,220 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-27 23:28:08,220 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-27 23:28:08,225 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:28:08,227 INFO L85 PathProgramCache]: Analyzing trace with hash 514898, now seen corresponding path program 1 times [2024-11-27 23:28:08,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:28:08,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154113431] [2024-11-27 23:28:08,235 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:28:08,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:28:08,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:28:08,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:28:08,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:28:08,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154113431] [2024-11-27 23:28:08,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154113431] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:28:08,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:28:08,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 23:28:08,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919546982] [2024-11-27 23:28:08,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:28:08,571 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 23:28:08,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:28:08,602 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 23:28:08,603 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 23:28:08,616 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-11-27 23:28:08,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 89 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) [2024-11-27 23:28:08,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:28:08,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-11-27 23:28:08,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:28:08,879 INFO L124 PetriNetUnfolderBase]: 168/364 cut-off events. [2024-11-27 23:28:08,879 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2024-11-27 23:28:08,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 669 conditions, 364 events. 168/364 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1679 event pairs, 136 based on Foata normal form. 1/281 useless extension candidates. Maximal degree in co-relation 613. Up to 276 conditions per place. [2024-11-27 23:28:08,888 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 23 selfloop transitions, 4 changer transitions 0/38 dead transitions. [2024-11-27 23:28:08,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 38 transitions, 139 flow [2024-11-27 23:28:08,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 23:28:08,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-27 23:28:08,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 86 transitions. [2024-11-27 23:28:08,904 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48863636363636365 [2024-11-27 23:28:08,906 INFO L175 Difference]: Start difference. First operand has 42 places, 40 transitions, 89 flow. Second operand 4 states and 86 transitions. [2024-11-27 23:28:08,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 38 transitions, 139 flow [2024-11-27 23:28:08,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 38 transitions, 134 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-27 23:28:08,916 INFO L231 Difference]: Finished difference. Result has 41 places, 38 transitions, 103 flow [2024-11-27 23:28:08,918 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=103, PETRI_PLACES=41, PETRI_TRANSITIONS=38} [2024-11-27 23:28:08,924 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, -1 predicate places. [2024-11-27 23:28:08,924 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 38 transitions, 103 flow [2024-11-27 23:28:08,925 INFO L472 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) [2024-11-27 23:28:08,925 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:28:08,926 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-11-27 23:28:08,926 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-27 23:28:08,926 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-27 23:28:08,927 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:28:08,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1840029890, now seen corresponding path program 1 times [2024-11-27 23:28:08,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:28:08,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463807467] [2024-11-27 23:28:08,928 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:28:08,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:28:08,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:28:09,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:28:09,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:28:09,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463807467] [2024-11-27 23:28:09,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463807467] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:28:09,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292888001] [2024-11-27 23:28:09,152 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:28:09,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:28:09,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:28:09,158 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:28:09,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-27 23:28:09,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:28:09,254 INFO L256 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-27 23:28:09,258 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:28:09,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:28:09,319 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 23:28:09,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292888001] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:28:09,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 23:28:09,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-11-27 23:28:09,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897197613] [2024-11-27 23:28:09,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:28:09,320 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 23:28:09,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:28:09,321 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 23:28:09,321 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-27 23:28:09,336 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-11-27 23:28:09,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 38 transitions, 103 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) [2024-11-27 23:28:09,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:28:09,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-11-27 23:28:09,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:28:09,604 INFO L124 PetriNetUnfolderBase]: 168/363 cut-off events. [2024-11-27 23:28:09,605 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-27 23:28:09,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 672 conditions, 363 events. 168/363 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1671 event pairs, 136 based on Foata normal form. 1/281 useless extension candidates. Maximal degree in co-relation 645. Up to 271 conditions per place. [2024-11-27 23:28:09,612 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 19 selfloop transitions, 7 changer transitions 0/37 dead transitions. [2024-11-27 23:28:09,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 37 transitions, 151 flow [2024-11-27 23:28:09,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 23:28:09,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-27 23:28:09,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-11-27 23:28:09,614 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3977272727272727 [2024-11-27 23:28:09,615 INFO L175 Difference]: Start difference. First operand has 41 places, 38 transitions, 103 flow. Second operand 6 states and 105 transitions. [2024-11-27 23:28:09,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 37 transitions, 151 flow [2024-11-27 23:28:09,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 37 transitions, 148 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-27 23:28:09,617 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 110 flow [2024-11-27 23:28:09,619 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=110, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-11-27 23:28:09,619 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 2 predicate places. [2024-11-27 23:28:09,620 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 110 flow [2024-11-27 23:28:09,620 INFO L472 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) [2024-11-27 23:28:09,620 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:28:09,620 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-27 23:28:09,630 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-27 23:28:09,821 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:28:09,821 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-27 23:28:09,822 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:28:09,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1837936135, now seen corresponding path program 1 times [2024-11-27 23:28:09,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:28:09,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671368264] [2024-11-27 23:28:09,822 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:28:09,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:28:09,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:28:10,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:28:10,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:28:10,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671368264] [2024-11-27 23:28:10,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671368264] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:28:10,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:28:10,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 23:28:10,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364083473] [2024-11-27 23:28:10,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:28:10,038 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 23:28:10,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:28:10,039 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 23:28:10,039 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 23:28:10,039 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 44 [2024-11-27 23:28:10,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 110 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) [2024-11-27 23:28:10,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:28:10,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 44 [2024-11-27 23:28:10,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:28:10,185 INFO L124 PetriNetUnfolderBase]: 180/395 cut-off events. [2024-11-27 23:28:10,186 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-11-27 23:28:10,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 746 conditions, 395 events. 180/395 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1781 event pairs, 149 based on Foata normal form. 17/331 useless extension candidates. Maximal degree in co-relation 647. Up to 273 conditions per place. [2024-11-27 23:28:10,192 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 22 selfloop transitions, 2 changer transitions 8/44 dead transitions. [2024-11-27 23:28:10,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 44 transitions, 191 flow [2024-11-27 23:28:10,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 23:28:10,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-27 23:28:10,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 98 transitions. [2024-11-27 23:28:10,194 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5568181818181818 [2024-11-27 23:28:10,194 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 110 flow. Second operand 4 states and 98 transitions. [2024-11-27 23:28:10,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 44 transitions, 191 flow [2024-11-27 23:28:10,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 44 transitions, 169 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-11-27 23:28:10,196 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-11-27 23:28:10,196 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-11-27 23:28:10,196 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 1 predicate places. [2024-11-27 23:28:10,199 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-11-27 23:28:10,200 INFO L472 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) [2024-11-27 23:28:10,200 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:28:10,200 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2024-11-27 23:28:10,200 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-27 23:28:10,200 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-27 23:28:10,201 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:28:10,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1206351225, now seen corresponding path program 1 times [2024-11-27 23:28:10,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:28:10,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793945477] [2024-11-27 23:28:10,201 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:28:10,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:28:10,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:28:10,320 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:28:10,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:28:10,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793945477] [2024-11-27 23:28:10,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793945477] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:28:10,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897872105] [2024-11-27 23:28:10,322 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:28:10,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:28:10,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:28:10,324 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:28:10,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-27 23:28:10,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:28:10,400 INFO L256 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-27 23:28:10,400 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:28:10,432 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:28:10,432 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:28:10,490 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:28:10,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897872105] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:28:10,491 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:28:10,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2024-11-27 23:28:10,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64848744] [2024-11-27 23:28:10,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:28:10,491 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-27 23:28:10,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:28:10,492 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-27 23:28:10,492 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-11-27 23:28:10,516 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-11-27 23:28:10,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 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) [2024-11-27 23:28:10,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:28:10,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-11-27 23:28:10,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:28:10,777 INFO L124 PetriNetUnfolderBase]: 170/374 cut-off events. [2024-11-27 23:28:10,777 INFO L125 PetriNetUnfolderBase]: For 44/44 co-relation queries the response was YES. [2024-11-27 23:28:10,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 783 conditions, 374 events. 170/374 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1749 event pairs, 136 based on Foata normal form. 3/292 useless extension candidates. Maximal degree in co-relation 767. Up to 277 conditions per place. [2024-11-27 23:28:10,781 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 22 selfloop transitions, 12 changer transitions 0/45 dead transitions. [2024-11-27 23:28:10,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 45 transitions, 200 flow [2024-11-27 23:28:10,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-27 23:28:10,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-27 23:28:10,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-11-27 23:28:10,784 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3795454545454545 [2024-11-27 23:28:10,784 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 10 states and 167 transitions. [2024-11-27 23:28:10,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 45 transitions, 200 flow [2024-11-27 23:28:10,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 45 transitions, 196 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-27 23:28:10,790 INFO L231 Difference]: Finished difference. Result has 52 places, 45 transitions, 170 flow [2024-11-27 23:28:10,790 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=170, PETRI_PLACES=52, PETRI_TRANSITIONS=45} [2024-11-27 23:28:10,790 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 10 predicate places. [2024-11-27 23:28:10,791 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 45 transitions, 170 flow [2024-11-27 23:28:10,791 INFO L472 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) [2024-11-27 23:28:10,791 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:28:10,791 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:28:10,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-27 23:28:10,991 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:28:10,992 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-27 23:28:10,992 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:28:10,992 INFO L85 PathProgramCache]: Analyzing trace with hash 339752589, now seen corresponding path program 1 times [2024-11-27 23:28:10,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:28:10,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017757288] [2024-11-27 23:28:10,993 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:28:10,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:28:11,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:28:11,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:28:11,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:28:11,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017757288] [2024-11-27 23:28:11,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017757288] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:28:11,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931965097] [2024-11-27 23:28:11,178 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:28:11,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:28:11,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:28:11,180 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:28:11,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-27 23:28:11,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:28:11,266 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-27 23:28:11,267 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:28:11,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 23:28:11,299 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 23:28:11,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931965097] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:28:11,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 23:28:11,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4] total 5 [2024-11-27 23:28:11,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810206942] [2024-11-27 23:28:11,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:28:11,301 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 23:28:11,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:28:11,302 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 23:28:11,302 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-27 23:28:11,302 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 44 [2024-11-27 23:28:11,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 45 transitions, 170 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) [2024-11-27 23:28:11,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:28:11,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 44 [2024-11-27 23:28:11,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:28:11,386 INFO L124 PetriNetUnfolderBase]: 111/258 cut-off events. [2024-11-27 23:28:11,386 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2024-11-27 23:28:11,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 535 conditions, 258 events. 111/258 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1058 event pairs, 83 based on Foata normal form. 0/229 useless extension candidates. Maximal degree in co-relation 500. Up to 187 conditions per place. [2024-11-27 23:28:11,389 INFO L140 encePairwiseOnDemand]: 40/44 looper letters, 29 selfloop transitions, 1 changer transitions 0/42 dead transitions. [2024-11-27 23:28:11,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 42 transitions, 218 flow [2024-11-27 23:28:11,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 23:28:11,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-27 23:28:11,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 67 transitions. [2024-11-27 23:28:11,392 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5075757575757576 [2024-11-27 23:28:11,392 INFO L175 Difference]: Start difference. First operand has 52 places, 45 transitions, 170 flow. Second operand 3 states and 67 transitions. [2024-11-27 23:28:11,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 42 transitions, 218 flow [2024-11-27 23:28:11,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 42 transitions, 208 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-11-27 23:28:11,396 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 150 flow [2024-11-27 23:28:11,397 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2024-11-27 23:28:11,397 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 7 predicate places. [2024-11-27 23:28:11,399 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 150 flow [2024-11-27 23:28:11,399 INFO L472 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) [2024-11-27 23:28:11,399 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:28:11,399 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:28:11,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-27 23:28:11,599 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:28:11,600 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-27 23:28:11,601 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:28:11,601 INFO L85 PathProgramCache]: Analyzing trace with hash 84740624, now seen corresponding path program 1 times [2024-11-27 23:28:11,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:28:11,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180571762] [2024-11-27 23:28:11,602 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:28:11,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:28:11,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:28:11,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 23:28:11,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:28:11,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180571762] [2024-11-27 23:28:11,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180571762] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:28:11,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:28:11,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 23:28:11,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244536216] [2024-11-27 23:28:11,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:28:11,721 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 23:28:11,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:28:11,721 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 23:28:11,722 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 23:28:11,730 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-11-27 23:28:11,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 150 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:28:11,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:28:11,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-11-27 23:28:11,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:28:11,923 INFO L124 PetriNetUnfolderBase]: 213/464 cut-off events. [2024-11-27 23:28:11,923 INFO L125 PetriNetUnfolderBase]: For 69/69 co-relation queries the response was YES. [2024-11-27 23:28:11,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 948 conditions, 464 events. 213/464 cut-off events. For 69/69 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 2140 event pairs, 128 based on Foata normal form. 12/438 useless extension candidates. Maximal degree in co-relation 936. Up to 281 conditions per place. [2024-11-27 23:28:11,927 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 47 selfloop transitions, 4 changer transitions 0/60 dead transitions. [2024-11-27 23:28:11,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 60 transitions, 298 flow [2024-11-27 23:28:11,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 23:28:11,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-27 23:28:11,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 90 transitions. [2024-11-27 23:28:11,929 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5113636363636364 [2024-11-27 23:28:11,929 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 150 flow. Second operand 4 states and 90 transitions. [2024-11-27 23:28:11,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 60 transitions, 298 flow [2024-11-27 23:28:11,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 60 transitions, 297 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-27 23:28:11,932 INFO L231 Difference]: Finished difference. Result has 53 places, 45 transitions, 178 flow [2024-11-27 23:28:11,932 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=178, PETRI_PLACES=53, PETRI_TRANSITIONS=45} [2024-11-27 23:28:11,933 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 11 predicate places. [2024-11-27 23:28:11,933 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 45 transitions, 178 flow [2024-11-27 23:28:11,933 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:28:11,933 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:28:11,933 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:28:11,933 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-27 23:28:11,934 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-27 23:28:11,934 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:28:11,934 INFO L85 PathProgramCache]: Analyzing trace with hash 62556291, now seen corresponding path program 1 times [2024-11-27 23:28:11,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:28:11,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198056049] [2024-11-27 23:28:11,935 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:28:11,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:28:11,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:28:12,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 23:28:12,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:28:12,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198056049] [2024-11-27 23:28:12,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198056049] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:28:12,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:28:12,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 23:28:12,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459269408] [2024-11-27 23:28:12,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:28:12,003 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 23:28:12,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:28:12,003 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 23:28:12,003 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 23:28:12,004 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 44 [2024-11-27 23:28:12,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 45 transitions, 178 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) [2024-11-27 23:28:12,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:28:12,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 44 [2024-11-27 23:28:12,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:28:12,099 INFO L124 PetriNetUnfolderBase]: 133/328 cut-off events. [2024-11-27 23:28:12,099 INFO L125 PetriNetUnfolderBase]: For 109/121 co-relation queries the response was YES. [2024-11-27 23:28:12,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 760 conditions, 328 events. 133/328 cut-off events. For 109/121 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1495 event pairs, 40 based on Foata normal form. 10/307 useless extension candidates. Maximal degree in co-relation 746. Up to 184 conditions per place. [2024-11-27 23:28:12,102 INFO L140 encePairwiseOnDemand]: 40/44 looper letters, 35 selfloop transitions, 3 changer transitions 0/51 dead transitions. [2024-11-27 23:28:12,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 51 transitions, 272 flow [2024-11-27 23:28:12,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 23:28:12,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-27 23:28:12,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2024-11-27 23:28:12,103 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-11-27 23:28:12,104 INFO L175 Difference]: Start difference. First operand has 53 places, 45 transitions, 178 flow. Second operand 3 states and 72 transitions. [2024-11-27 23:28:12,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 51 transitions, 272 flow [2024-11-27 23:28:12,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 51 transitions, 269 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-27 23:28:12,107 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 198 flow [2024-11-27 23:28:12,107 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=198, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2024-11-27 23:28:12,108 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 13 predicate places. [2024-11-27 23:28:12,108 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 198 flow [2024-11-27 23:28:12,108 INFO L472 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) [2024-11-27 23:28:12,108 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:28:12,108 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:28:12,108 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-27 23:28:12,109 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-27 23:28:12,109 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:28:12,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1783001566, now seen corresponding path program 1 times [2024-11-27 23:28:12,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:28:12,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084230601] [2024-11-27 23:28:12,110 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:28:12,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:28:12,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:28:12,946 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:28:12,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:28:12,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084230601] [2024-11-27 23:28:12,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084230601] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:28:12,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024027554] [2024-11-27 23:28:12,947 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:28:12,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:28:12,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:28:12,949 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:28:12,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-27 23:28:13,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:28:13,036 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-27 23:28:13,038 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:28:13,133 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-27 23:28:13,678 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 17 treesize of output 9 [2024-11-27 23:28:13,709 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:28:13,709 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:28:14,238 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 21 treesize of output 19 [2024-11-27 23:28:14,246 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 28 treesize of output 22 [2024-11-27 23:28:14,318 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:28:14,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024027554] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:28:14,319 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:28:14,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2024-11-27 23:28:14,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166830326] [2024-11-27 23:28:14,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:28:14,319 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-27 23:28:14,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:28:14,320 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-27 23:28:14,320 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2024-11-27 23:28:14,492 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-11-27 23:28:14,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 198 flow. Second operand has 20 states, 20 states have (on average 10.8) internal successors, (216), 20 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:28:14,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:28:14,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-11-27 23:28:14,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:28:16,227 INFO L124 PetriNetUnfolderBase]: 465/962 cut-off events. [2024-11-27 23:28:16,227 INFO L125 PetriNetUnfolderBase]: For 539/588 co-relation queries the response was YES. [2024-11-27 23:28:16,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2482 conditions, 962 events. 465/962 cut-off events. For 539/588 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 5229 event pairs, 57 based on Foata normal form. 19/927 useless extension candidates. Maximal degree in co-relation 2466. Up to 289 conditions per place. [2024-11-27 23:28:16,235 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 87 selfloop transitions, 24 changer transitions 0/119 dead transitions. [2024-11-27 23:28:16,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 119 transitions, 683 flow [2024-11-27 23:28:16,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-27 23:28:16,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-27 23:28:16,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 228 transitions. [2024-11-27 23:28:16,240 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.37012987012987014 [2024-11-27 23:28:16,240 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 198 flow. Second operand 14 states and 228 transitions. [2024-11-27 23:28:16,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 119 transitions, 683 flow [2024-11-27 23:28:16,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 119 transitions, 634 flow, removed 21 selfloop flow, removed 2 redundant places. [2024-11-27 23:28:16,251 INFO L231 Difference]: Finished difference. Result has 70 places, 58 transitions, 309 flow [2024-11-27 23:28:16,251 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=309, PETRI_PLACES=70, PETRI_TRANSITIONS=58} [2024-11-27 23:28:16,252 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 28 predicate places. [2024-11-27 23:28:16,252 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 58 transitions, 309 flow [2024-11-27 23:28:16,252 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 10.8) internal successors, (216), 20 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:28:16,252 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:28:16,252 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:28:16,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-27 23:28:16,452 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-27 23:28:16,453 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-27 23:28:16,453 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:28:16,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1260477358, now seen corresponding path program 1 times [2024-11-27 23:28:16,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:28:16,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039616405] [2024-11-27 23:28:16,453 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:28:16,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:28:16,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:28:16,985 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:28:16,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:28:16,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039616405] [2024-11-27 23:28:16,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039616405] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:28:16,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198122480] [2024-11-27 23:28:16,986 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:28:16,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:28:16,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:28:16,988 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:28:16,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-27 23:28:17,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:28:17,057 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-27 23:28:17,060 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:28:17,101 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-27 23:28:17,453 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-27 23:28:17,484 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:28:17,484 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:28:17,900 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 [2024-11-27 23:28:17,907 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 [2024-11-27 23:28:17,969 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:28:17,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198122480] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:28:17,969 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:28:17,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 17 [2024-11-27 23:28:17,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025045920] [2024-11-27 23:28:17,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:28:17,970 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-27 23:28:17,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:28:17,971 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-27 23:28:17,972 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2024-11-27 23:28:18,239 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-11-27 23:28:18,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 58 transitions, 309 flow. Second operand has 19 states, 19 states have (on average 11.894736842105264) internal successors, (226), 19 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:28:18,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:28:18,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-11-27 23:28:18,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:28:19,633 INFO L124 PetriNetUnfolderBase]: 376/831 cut-off events. [2024-11-27 23:28:19,634 INFO L125 PetriNetUnfolderBase]: For 648/696 co-relation queries the response was YES. [2024-11-27 23:28:19,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2299 conditions, 831 events. 376/831 cut-off events. For 648/696 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 4596 event pairs, 57 based on Foata normal form. 50/878 useless extension candidates. Maximal degree in co-relation 2279. Up to 302 conditions per place. [2024-11-27 23:28:19,640 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 82 selfloop transitions, 24 changer transitions 0/116 dead transitions. [2024-11-27 23:28:19,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 116 transitions, 724 flow [2024-11-27 23:28:19,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-27 23:28:19,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-27 23:28:19,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 237 transitions. [2024-11-27 23:28:19,642 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3847402597402597 [2024-11-27 23:28:19,642 INFO L175 Difference]: Start difference. First operand has 70 places, 58 transitions, 309 flow. Second operand 14 states and 237 transitions. [2024-11-27 23:28:19,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 116 transitions, 724 flow [2024-11-27 23:28:19,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 116 transitions, 711 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-11-27 23:28:19,649 INFO L231 Difference]: Finished difference. Result has 82 places, 59 transitions, 368 flow [2024-11-27 23:28:19,649 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=368, PETRI_PLACES=82, PETRI_TRANSITIONS=59} [2024-11-27 23:28:19,650 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 40 predicate places. [2024-11-27 23:28:19,650 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 59 transitions, 368 flow [2024-11-27 23:28:19,650 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 11.894736842105264) internal successors, (226), 19 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:28:19,650 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:28:19,650 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1] [2024-11-27 23:28:19,659 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-27 23:28:19,854 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:28:19,854 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-27 23:28:19,856 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:28:19,856 INFO L85 PathProgramCache]: Analyzing trace with hash 2074165235, now seen corresponding path program 2 times [2024-11-27 23:28:19,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:28:19,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016176615] [2024-11-27 23:28:19,856 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:28:19,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:28:19,872 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:28:19,872 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:28:19,944 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-27 23:28:19,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:28:19,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016176615] [2024-11-27 23:28:19,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016176615] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:28:19,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059892681] [2024-11-27 23:28:19,946 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:28:19,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:28:19,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:28:19,948 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:28:19,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-27 23:28:20,024 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:28:20,024 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:28:20,025 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-27 23:28:20,027 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:28:20,052 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-27 23:28:20,052 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:28:20,078 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-27 23:28:20,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059892681] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:28:20,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:28:20,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 2 [2024-11-27 23:28:20,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432629507] [2024-11-27 23:28:20,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:28:20,079 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 23:28:20,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:28:20,081 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 23:28:20,081 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 23:28:20,086 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-11-27 23:28:20,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 59 transitions, 368 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:28:20,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:28:20,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-11-27 23:28:20,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:28:20,223 INFO L124 PetriNetUnfolderBase]: 326/709 cut-off events. [2024-11-27 23:28:20,223 INFO L125 PetriNetUnfolderBase]: For 1096/1144 co-relation queries the response was YES. [2024-11-27 23:28:20,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2197 conditions, 709 events. 326/709 cut-off events. For 1096/1144 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3783 event pairs, 212 based on Foata normal form. 13/679 useless extension candidates. Maximal degree in co-relation 2173. Up to 563 conditions per place. [2024-11-27 23:28:20,229 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 30 selfloop transitions, 15 changer transitions 0/58 dead transitions. [2024-11-27 23:28:20,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 58 transitions, 448 flow [2024-11-27 23:28:20,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 23:28:20,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-27 23:28:20,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 72 transitions. [2024-11-27 23:28:20,230 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-11-27 23:28:20,230 INFO L175 Difference]: Start difference. First operand has 82 places, 59 transitions, 368 flow. Second operand 4 states and 72 transitions. [2024-11-27 23:28:20,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 58 transitions, 448 flow [2024-11-27 23:28:20,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 58 transitions, 398 flow, removed 2 selfloop flow, removed 16 redundant places. [2024-11-27 23:28:20,238 INFO L231 Difference]: Finished difference. Result has 68 places, 58 transitions, 338 flow [2024-11-27 23:28:20,238 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=338, PETRI_PLACES=68, PETRI_TRANSITIONS=58} [2024-11-27 23:28:20,239 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 26 predicate places. [2024-11-27 23:28:20,239 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 58 transitions, 338 flow [2024-11-27 23:28:20,239 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:28:20,239 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:28:20,239 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:28:20,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-27 23:28:20,440 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-27 23:28:20,440 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-27 23:28:20,440 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:28:20,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1702453266, now seen corresponding path program 1 times [2024-11-27 23:28:20,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:28:20,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523866883] [2024-11-27 23:28:20,441 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:28:20,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:28:20,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:28:20,640 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:28:20,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:28:20,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523866883] [2024-11-27 23:28:20,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523866883] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:28:20,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009998508] [2024-11-27 23:28:20,641 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:28:20,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:28:20,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:28:20,645 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:28:20,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-27 23:28:20,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:28:20,714 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-27 23:28:20,715 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:28:20,808 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:28:20,808 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:28:20,931 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:28:20,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009998508] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:28:20,931 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:28:20,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2024-11-27 23:28:20,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030874445] [2024-11-27 23:28:20,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:28:20,931 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-27 23:28:20,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:28:20,932 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-27 23:28:20,932 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2024-11-27 23:28:20,955 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-11-27 23:28:20,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 58 transitions, 338 flow. Second operand has 15 states, 15 states have (on average 14.533333333333333) internal successors, (218), 15 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:28:20,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:28:20,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-11-27 23:28:20,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:28:21,207 INFO L124 PetriNetUnfolderBase]: 332/767 cut-off events. [2024-11-27 23:28:21,208 INFO L125 PetriNetUnfolderBase]: For 927/971 co-relation queries the response was YES. [2024-11-27 23:28:21,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2257 conditions, 767 events. 332/767 cut-off events. For 927/971 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 4309 event pairs, 203 based on Foata normal form. 52/776 useless extension candidates. Maximal degree in co-relation 2237. Up to 389 conditions per place. [2024-11-27 23:28:21,213 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 46 selfloop transitions, 13 changer transitions 1/73 dead transitions. [2024-11-27 23:28:21,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 73 transitions, 497 flow [2024-11-27 23:28:21,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-27 23:28:21,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-27 23:28:21,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-11-27 23:28:21,215 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42613636363636365 [2024-11-27 23:28:21,215 INFO L175 Difference]: Start difference. First operand has 68 places, 58 transitions, 338 flow. Second operand 8 states and 150 transitions. [2024-11-27 23:28:21,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 73 transitions, 497 flow [2024-11-27 23:28:21,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 73 transitions, 463 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-11-27 23:28:21,225 INFO L231 Difference]: Finished difference. Result has 71 places, 55 transitions, 315 flow [2024-11-27 23:28:21,225 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=283, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=315, PETRI_PLACES=71, PETRI_TRANSITIONS=55} [2024-11-27 23:28:21,226 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 29 predicate places. [2024-11-27 23:28:21,226 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 55 transitions, 315 flow [2024-11-27 23:28:21,227 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 14.533333333333333) internal successors, (218), 15 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:28:21,227 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:28:21,227 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:28:21,236 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-27 23:28:21,431 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-27 23:28:21,431 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-27 23:28:21,431 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:28:21,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1356833767, now seen corresponding path program 1 times [2024-11-27 23:28:21,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:28:21,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598848250] [2024-11-27 23:28:21,432 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:28:21,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:28:21,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:28:21,621 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:28:21,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:28:21,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598848250] [2024-11-27 23:28:21,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598848250] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:28:21,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925668243] [2024-11-27 23:28:21,621 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:28:21,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:28:21,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:28:21,624 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:28:21,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-27 23:28:21,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:28:21,707 INFO L256 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-27 23:28:21,709 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:28:21,829 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:28:21,829 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:28:22,007 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:28:22,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925668243] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:28:22,007 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:28:22,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 15 [2024-11-27 23:28:22,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955185647] [2024-11-27 23:28:22,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:28:22,009 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-27 23:28:22,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:28:22,009 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-27 23:28:22,011 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2024-11-27 23:28:22,039 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-11-27 23:28:22,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 55 transitions, 315 flow. Second operand has 16 states, 16 states have (on average 14.75) internal successors, (236), 16 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:28:22,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:28:22,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-11-27 23:28:22,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:28:22,468 INFO L124 PetriNetUnfolderBase]: 309/774 cut-off events. [2024-11-27 23:28:22,468 INFO L125 PetriNetUnfolderBase]: For 911/930 co-relation queries the response was YES. [2024-11-27 23:28:22,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2178 conditions, 774 events. 309/774 cut-off events. For 911/930 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 4455 event pairs, 77 based on Foata normal form. 19/761 useless extension candidates. Maximal degree in co-relation 2158. Up to 320 conditions per place. [2024-11-27 23:28:22,473 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 27 selfloop transitions, 14 changer transitions 26/80 dead transitions. [2024-11-27 23:28:22,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 80 transitions, 520 flow [2024-11-27 23:28:22,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-27 23:28:22,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-27 23:28:22,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-11-27 23:28:22,475 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-11-27 23:28:22,475 INFO L175 Difference]: Start difference. First operand has 71 places, 55 transitions, 315 flow. Second operand 10 states and 187 transitions. [2024-11-27 23:28:22,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 80 transitions, 520 flow [2024-11-27 23:28:22,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 80 transitions, 495 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-27 23:28:22,482 INFO L231 Difference]: Finished difference. Result has 75 places, 50 transitions, 285 flow [2024-11-27 23:28:22,482 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=285, PETRI_PLACES=75, PETRI_TRANSITIONS=50} [2024-11-27 23:28:22,483 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 33 predicate places. [2024-11-27 23:28:22,483 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 50 transitions, 285 flow [2024-11-27 23:28:22,483 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 14.75) internal successors, (236), 16 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:28:22,483 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:28:22,483 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:28:22,493 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-27 23:28:22,687 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-27 23:28:22,687 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-27 23:28:22,688 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:28:22,688 INFO L85 PathProgramCache]: Analyzing trace with hash -609182810, now seen corresponding path program 2 times [2024-11-27 23:28:22,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:28:22,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632211052] [2024-11-27 23:28:22,688 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:28:22,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:28:22,701 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:28:22,701 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:28:22,748 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-27 23:28:22,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:28:22,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632211052] [2024-11-27 23:28:22,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632211052] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:28:22,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:28:22,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 23:28:22,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142876284] [2024-11-27 23:28:22,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:28:22,750 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 23:28:22,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:28:22,751 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 23:28:22,751 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-27 23:28:22,761 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-11-27 23:28:22,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 50 transitions, 285 flow. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:28:22,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:28:22,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-11-27 23:28:22,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:28:22,925 INFO L124 PetriNetUnfolderBase]: 363/727 cut-off events. [2024-11-27 23:28:22,925 INFO L125 PetriNetUnfolderBase]: For 1026/1047 co-relation queries the response was YES. [2024-11-27 23:28:22,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2222 conditions, 727 events. 363/727 cut-off events. For 1026/1047 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 3403 event pairs, 98 based on Foata normal form. 30/722 useless extension candidates. Maximal degree in co-relation 2200. Up to 230 conditions per place. [2024-11-27 23:28:22,931 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 51 selfloop transitions, 7 changer transitions 1/67 dead transitions. [2024-11-27 23:28:22,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 67 transitions, 491 flow [2024-11-27 23:28:22,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 23:28:22,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-27 23:28:22,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 81 transitions. [2024-11-27 23:28:22,932 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4602272727272727 [2024-11-27 23:28:22,932 INFO L175 Difference]: Start difference. First operand has 75 places, 50 transitions, 285 flow. Second operand 4 states and 81 transitions. [2024-11-27 23:28:22,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 67 transitions, 491 flow [2024-11-27 23:28:22,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 67 transitions, 439 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-11-27 23:28:22,938 INFO L231 Difference]: Finished difference. Result has 59 places, 49 transitions, 253 flow [2024-11-27 23:28:22,939 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=253, PETRI_PLACES=59, PETRI_TRANSITIONS=49} [2024-11-27 23:28:22,940 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 17 predicate places. [2024-11-27 23:28:22,940 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 49 transitions, 253 flow [2024-11-27 23:28:22,941 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:28:22,941 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:28:22,941 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:28:22,941 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-27 23:28:22,942 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-27 23:28:22,942 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:28:22,942 INFO L85 PathProgramCache]: Analyzing trace with hash -673087596, now seen corresponding path program 2 times [2024-11-27 23:28:22,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:28:22,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138254806] [2024-11-27 23:28:22,942 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:28:22,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:28:22,967 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:28:22,967 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:28:23,076 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-27 23:28:23,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:28:23,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138254806] [2024-11-27 23:28:23,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138254806] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:28:23,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:28:23,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 23:28:23,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591341325] [2024-11-27 23:28:23,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:28:23,077 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 23:28:23,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:28:23,078 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 23:28:23,079 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-27 23:28:23,098 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-11-27 23:28:23,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 49 transitions, 253 flow. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:28:23,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:28:23,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-11-27 23:28:23,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:28:23,296 INFO L124 PetriNetUnfolderBase]: 332/762 cut-off events. [2024-11-27 23:28:23,296 INFO L125 PetriNetUnfolderBase]: For 968/993 co-relation queries the response was YES. [2024-11-27 23:28:23,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2260 conditions, 762 events. 332/762 cut-off events. For 968/993 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 4071 event pairs, 44 based on Foata normal form. 38/798 useless extension candidates. Maximal degree in co-relation 2244. Up to 243 conditions per place. [2024-11-27 23:28:23,302 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 59 selfloop transitions, 8 changer transitions 0/77 dead transitions. [2024-11-27 23:28:23,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 77 transitions, 514 flow [2024-11-27 23:28:23,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 23:28:23,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 23:28:23,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 115 transitions. [2024-11-27 23:28:23,304 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5227272727272727 [2024-11-27 23:28:23,304 INFO L175 Difference]: Start difference. First operand has 59 places, 49 transitions, 253 flow. Second operand 5 states and 115 transitions. [2024-11-27 23:28:23,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 77 transitions, 514 flow [2024-11-27 23:28:23,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 77 transitions, 488 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-27 23:28:23,310 INFO L231 Difference]: Finished difference. Result has 62 places, 52 transitions, 290 flow [2024-11-27 23:28:23,310 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=290, PETRI_PLACES=62, PETRI_TRANSITIONS=52} [2024-11-27 23:28:23,312 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 20 predicate places. [2024-11-27 23:28:23,312 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 52 transitions, 290 flow [2024-11-27 23:28:23,312 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:28:23,312 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:28:23,313 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:28:23,313 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-27 23:28:23,313 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-27 23:28:23,313 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:28:23,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1443769380, now seen corresponding path program 1 times [2024-11-27 23:28:23,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:28:23,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930494547] [2024-11-27 23:28:23,314 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:28:23,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:28:23,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:28:24,345 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:28:24,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:28:24,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930494547] [2024-11-27 23:28:24,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930494547] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:28:24,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596111689] [2024-11-27 23:28:24,345 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:28:24,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:28:24,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:28:24,349 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:28:24,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-27 23:28:24,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:28:24,434 INFO L256 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-27 23:28:24,435 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:28:24,718 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 23:28:24,718 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:28:24,798 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:28:24,798 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 27 treesize of output 19 [2024-11-27 23:28:24,931 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-27 23:28:24,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596111689] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-27 23:28:24,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-27 23:28:24,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10, 7] total 20 [2024-11-27 23:28:24,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199619909] [2024-11-27 23:28:24,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:28:24,933 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 23:28:24,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:28:24,934 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 23:28:24,934 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2024-11-27 23:28:24,952 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-11-27 23:28:24,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 52 transitions, 290 flow. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:28:24,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:28:24,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-11-27 23:28:24,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:28:25,201 INFO L124 PetriNetUnfolderBase]: 438/881 cut-off events. [2024-11-27 23:28:25,201 INFO L125 PetriNetUnfolderBase]: For 1208/1248 co-relation queries the response was YES. [2024-11-27 23:28:25,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2672 conditions, 881 events. 438/881 cut-off events. For 1208/1248 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 4417 event pairs, 26 based on Foata normal form. 27/906 useless extension candidates. Maximal degree in co-relation 2653. Up to 259 conditions per place. [2024-11-27 23:28:25,209 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 55 selfloop transitions, 12 changer transitions 0/74 dead transitions. [2024-11-27 23:28:25,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 74 transitions, 509 flow [2024-11-27 23:28:25,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 23:28:25,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 23:28:25,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 102 transitions. [2024-11-27 23:28:25,211 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4636363636363636 [2024-11-27 23:28:25,211 INFO L175 Difference]: Start difference. First operand has 62 places, 52 transitions, 290 flow. Second operand 5 states and 102 transitions. [2024-11-27 23:28:25,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 74 transitions, 509 flow [2024-11-27 23:28:25,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 74 transitions, 504 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-27 23:28:25,217 INFO L231 Difference]: Finished difference. Result has 68 places, 54 transitions, 347 flow [2024-11-27 23:28:25,218 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=347, PETRI_PLACES=68, PETRI_TRANSITIONS=54} [2024-11-27 23:28:25,219 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 26 predicate places. [2024-11-27 23:28:25,219 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 54 transitions, 347 flow [2024-11-27 23:28:25,220 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:28:25,220 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:28:25,220 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-27 23:28:25,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-27 23:28:25,421 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:28:25,421 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-27 23:28:25,422 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:28:25,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1704797387, now seen corresponding path program 1 times [2024-11-27 23:28:25,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:28:25,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579766279] [2024-11-27 23:28:25,422 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:28:25,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:28:25,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:28:25,517 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-27 23:28:25,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:28:25,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579766279] [2024-11-27 23:28:25,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579766279] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:28:25,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376508653] [2024-11-27 23:28:25,518 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:28:25,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:28:25,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:28:25,520 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:28:25,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-27 23:28:25,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:28:25,599 INFO L256 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-27 23:28:25,600 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:28:25,629 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-27 23:28:25,630 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:28:25,676 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-27 23:28:25,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376508653] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:28:25,676 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:28:25,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-11-27 23:28:25,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306700324] [2024-11-27 23:28:25,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:28:25,677 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-27 23:28:25,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:28:25,677 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-27 23:28:25,677 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-11-27 23:28:25,710 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-11-27 23:28:25,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 54 transitions, 347 flow. Second operand has 12 states, 12 states have (on average 13.916666666666666) internal successors, (167), 12 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:28:25,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:28:25,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-11-27 23:28:25,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:28:26,156 INFO L124 PetriNetUnfolderBase]: 789/1592 cut-off events. [2024-11-27 23:28:26,156 INFO L125 PetriNetUnfolderBase]: For 5343/5530 co-relation queries the response was YES. [2024-11-27 23:28:26,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5348 conditions, 1592 events. 789/1592 cut-off events. For 5343/5530 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 8205 event pairs, 201 based on Foata normal form. 18/1572 useless extension candidates. Maximal degree in co-relation 5325. Up to 658 conditions per place. [2024-11-27 23:28:26,169 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 131 selfloop transitions, 13 changer transitions 0/154 dead transitions. [2024-11-27 23:28:26,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 154 transitions, 1361 flow [2024-11-27 23:28:26,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-27 23:28:26,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-27 23:28:26,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 216 transitions. [2024-11-27 23:28:26,171 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4909090909090909 [2024-11-27 23:28:26,171 INFO L175 Difference]: Start difference. First operand has 68 places, 54 transitions, 347 flow. Second operand 10 states and 216 transitions. [2024-11-27 23:28:26,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 154 transitions, 1361 flow [2024-11-27 23:28:26,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 154 transitions, 1315 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-27 23:28:26,180 INFO L231 Difference]: Finished difference. Result has 78 places, 63 transitions, 413 flow [2024-11-27 23:28:26,180 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=333, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=413, PETRI_PLACES=78, PETRI_TRANSITIONS=63} [2024-11-27 23:28:26,181 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 36 predicate places. [2024-11-27 23:28:26,181 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 63 transitions, 413 flow [2024-11-27 23:28:26,181 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 13.916666666666666) internal successors, (167), 12 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:28:26,181 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:28:26,182 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:28:26,192 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-27 23:28:26,382 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-27 23:28:26,382 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-27 23:28:26,383 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:28:26,383 INFO L85 PathProgramCache]: Analyzing trace with hash 609121554, now seen corresponding path program 2 times [2024-11-27 23:28:26,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:28:26,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487452393] [2024-11-27 23:28:26,383 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:28:26,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:28:26,404 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:28:26,409 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:28:26,517 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-27 23:28:26,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:28:26,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487452393] [2024-11-27 23:28:26,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487452393] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:28:26,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:28:26,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 23:28:26,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480460132] [2024-11-27 23:28:26,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:28:26,519 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 23:28:26,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:28:26,519 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 23:28:26,520 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-27 23:28:26,537 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-11-27 23:28:26,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 63 transitions, 413 flow. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:28:26,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:28:26,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-11-27 23:28:26,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:28:26,849 INFO L124 PetriNetUnfolderBase]: 671/1443 cut-off events. [2024-11-27 23:28:26,851 INFO L125 PetriNetUnfolderBase]: For 3702/3738 co-relation queries the response was YES. [2024-11-27 23:28:26,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5082 conditions, 1443 events. 671/1443 cut-off events. For 3702/3738 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 7871 event pairs, 47 based on Foata normal form. 25/1462 useless extension candidates. Maximal degree in co-relation 5056. Up to 548 conditions per place. [2024-11-27 23:28:26,863 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 77 selfloop transitions, 9 changer transitions 0/100 dead transitions. [2024-11-27 23:28:26,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 100 transitions, 776 flow [2024-11-27 23:28:26,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 23:28:26,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 23:28:26,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 113 transitions. [2024-11-27 23:28:26,865 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5136363636363637 [2024-11-27 23:28:26,865 INFO L175 Difference]: Start difference. First operand has 78 places, 63 transitions, 413 flow. Second operand 5 states and 113 transitions. [2024-11-27 23:28:26,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 100 transitions, 776 flow [2024-11-27 23:28:26,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 100 transitions, 708 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-11-27 23:28:26,879 INFO L231 Difference]: Finished difference. Result has 79 places, 65 transitions, 424 flow [2024-11-27 23:28:26,879 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=377, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=424, PETRI_PLACES=79, PETRI_TRANSITIONS=65} [2024-11-27 23:28:26,879 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 37 predicate places. [2024-11-27 23:28:26,880 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 65 transitions, 424 flow [2024-11-27 23:28:26,881 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:28:26,881 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:28:26,881 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:28:26,881 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-27 23:28:26,881 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-27 23:28:26,882 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:28:26,882 INFO L85 PathProgramCache]: Analyzing trace with hash -492957302, now seen corresponding path program 1 times [2024-11-27 23:28:26,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:28:26,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594865200] [2024-11-27 23:28:26,884 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:28:26,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:28:26,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:28:27,935 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:28:27,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:28:27,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594865200] [2024-11-27 23:28:27,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594865200] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:28:27,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870591444] [2024-11-27 23:28:27,936 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:28:27,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:28:27,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:28:27,938 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:28:27,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-27 23:28:28,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:28:28,024 INFO L256 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-27 23:28:28,025 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:28:28,299 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 23:28:28,300 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:28:28,373 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:28:28,373 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2024-11-27 23:28:28,470 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-27 23:28:28,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870591444] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-27 23:28:28,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-27 23:28:28,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10, 7] total 20 [2024-11-27 23:28:28,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182260934] [2024-11-27 23:28:28,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:28:28,471 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 23:28:28,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:28:28,472 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 23:28:28,472 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2024-11-27 23:28:28,490 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-11-27 23:28:28,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 65 transitions, 424 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) [2024-11-27 23:28:28,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:28:28,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-11-27 23:28:28,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:28:28,767 INFO L124 PetriNetUnfolderBase]: 705/1469 cut-off events. [2024-11-27 23:28:28,767 INFO L125 PetriNetUnfolderBase]: For 4054/4102 co-relation queries the response was YES. [2024-11-27 23:28:28,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5076 conditions, 1469 events. 705/1469 cut-off events. For 4054/4102 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 7911 event pairs, 185 based on Foata normal form. 5/1442 useless extension candidates. Maximal degree in co-relation 5049. Up to 947 conditions per place. [2024-11-27 23:28:28,780 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 67 selfloop transitions, 10 changer transitions 0/90 dead transitions. [2024-11-27 23:28:28,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 90 transitions, 675 flow [2024-11-27 23:28:28,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 23:28:28,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 23:28:28,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 105 transitions. [2024-11-27 23:28:28,781 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-11-27 23:28:28,781 INFO L175 Difference]: Start difference. First operand has 79 places, 65 transitions, 424 flow. Second operand 5 states and 105 transitions. [2024-11-27 23:28:28,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 90 transitions, 675 flow [2024-11-27 23:28:28,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 90 transitions, 661 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-27 23:28:28,791 INFO L231 Difference]: Finished difference. Result has 81 places, 66 transitions, 450 flow [2024-11-27 23:28:28,791 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=410, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=450, PETRI_PLACES=81, PETRI_TRANSITIONS=66} [2024-11-27 23:28:28,791 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 39 predicate places. [2024-11-27 23:28:28,792 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 66 transitions, 450 flow [2024-11-27 23:28:28,792 INFO L472 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) [2024-11-27 23:28:28,792 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:28:28,792 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:28:28,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-27 23:28:28,992 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-27 23:28:28,993 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-27 23:28:28,993 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:28:28,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1953956525, now seen corresponding path program 2 times [2024-11-27 23:28:28,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:28:28,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249223491] [2024-11-27 23:28:28,994 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:28:28,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:28:29,012 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:28:29,012 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:28:29,075 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-27 23:28:29,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:28:29,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249223491] [2024-11-27 23:28:29,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249223491] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:28:29,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:28:29,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 23:28:29,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296097490] [2024-11-27 23:28:29,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:28:29,076 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 23:28:29,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:28:29,078 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 23:28:29,078 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-27 23:28:29,078 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 44 [2024-11-27 23:28:29,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 66 transitions, 450 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) [2024-11-27 23:28:29,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:28:29,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 44 [2024-11-27 23:28:29,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:28:29,435 INFO L124 PetriNetUnfolderBase]: 806/1926 cut-off events. [2024-11-27 23:28:29,435 INFO L125 PetriNetUnfolderBase]: For 6367/6557 co-relation queries the response was YES. [2024-11-27 23:28:29,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6629 conditions, 1926 events. 806/1926 cut-off events. For 6367/6557 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 11544 event pairs, 133 based on Foata normal form. 45/1954 useless extension candidates. Maximal degree in co-relation 6601. Up to 717 conditions per place. [2024-11-27 23:28:29,460 INFO L140 encePairwiseOnDemand]: 40/44 looper letters, 76 selfloop transitions, 11 changer transitions 7/110 dead transitions. [2024-11-27 23:28:29,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 110 transitions, 893 flow [2024-11-27 23:28:29,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 23:28:29,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-27 23:28:29,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 105 transitions. [2024-11-27 23:28:29,461 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5965909090909091 [2024-11-27 23:28:29,461 INFO L175 Difference]: Start difference. First operand has 81 places, 66 transitions, 450 flow. Second operand 4 states and 105 transitions. [2024-11-27 23:28:29,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 110 transitions, 893 flow [2024-11-27 23:28:29,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 110 transitions, 860 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-11-27 23:28:29,475 INFO L231 Difference]: Finished difference. Result has 83 places, 67 transitions, 482 flow [2024-11-27 23:28:29,475 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=421, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=482, PETRI_PLACES=83, PETRI_TRANSITIONS=67} [2024-11-27 23:28:29,476 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 41 predicate places. [2024-11-27 23:28:29,476 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 67 transitions, 482 flow [2024-11-27 23:28:29,476 INFO L472 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) [2024-11-27 23:28:29,477 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:28:29,477 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:28:29,477 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-27 23:28:29,477 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-27 23:28:29,478 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:28:29,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1709537787, now seen corresponding path program 1 times [2024-11-27 23:28:29,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:28:29,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291241504] [2024-11-27 23:28:29,478 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:28:29,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:28:29,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:28:30,392 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:28:30,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:28:30,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291241504] [2024-11-27 23:28:30,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291241504] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:28:30,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632757907] [2024-11-27 23:28:30,392 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:28:30,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:28:30,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:28:30,395 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:28:30,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-27 23:28:30,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:28:30,493 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-27 23:28:30,495 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:28:31,133 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:28:31,134 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:28:31,548 INFO L349 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2024-11-27 23:28:31,548 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 42 [2024-11-27 23:28:32,114 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:28:32,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632757907] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:28:32,115 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:28:32,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 34 [2024-11-27 23:28:32,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394511317] [2024-11-27 23:28:32,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:28:32,116 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-27 23:28:32,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:28:32,116 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-27 23:28:32,117 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=999, Unknown=0, NotChecked=0, Total=1260 [2024-11-27 23:28:32,324 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-11-27 23:28:32,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 67 transitions, 482 flow. Second operand has 36 states, 36 states have (on average 10.61111111111111) internal successors, (382), 36 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:28:32,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:28:32,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-11-27 23:28:32,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:28:36,316 INFO L124 PetriNetUnfolderBase]: 3357/6574 cut-off events. [2024-11-27 23:28:36,316 INFO L125 PetriNetUnfolderBase]: For 25325/25569 co-relation queries the response was YES. [2024-11-27 23:28:36,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24421 conditions, 6574 events. 3357/6574 cut-off events. For 25325/25569 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 46692 event pairs, 241 based on Foata normal form. 250/6807 useless extension candidates. Maximal degree in co-relation 24391. Up to 1239 conditions per place. [2024-11-27 23:28:36,378 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 387 selfloop transitions, 128 changer transitions 24/549 dead transitions. [2024-11-27 23:28:36,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 549 transitions, 4455 flow [2024-11-27 23:28:36,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-27 23:28:36,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2024-11-27 23:28:36,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 803 transitions. [2024-11-27 23:28:36,382 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3802083333333333 [2024-11-27 23:28:36,382 INFO L175 Difference]: Start difference. First operand has 83 places, 67 transitions, 482 flow. Second operand 48 states and 803 transitions. [2024-11-27 23:28:36,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 549 transitions, 4455 flow [2024-11-27 23:28:36,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 549 transitions, 4262 flow, removed 85 selfloop flow, removed 3 redundant places. [2024-11-27 23:28:36,461 INFO L231 Difference]: Finished difference. Result has 156 places, 194 transitions, 2199 flow [2024-11-27 23:28:36,461 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=451, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=2199, PETRI_PLACES=156, PETRI_TRANSITIONS=194} [2024-11-27 23:28:36,462 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 114 predicate places. [2024-11-27 23:28:36,462 INFO L471 AbstractCegarLoop]: Abstraction has has 156 places, 194 transitions, 2199 flow [2024-11-27 23:28:36,462 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 10.61111111111111) internal successors, (382), 36 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:28:36,462 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:28:36,462 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:28:36,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-27 23:28:36,667 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:28:36,667 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-27 23:28:36,668 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:28:36,668 INFO L85 PathProgramCache]: Analyzing trace with hash 535229023, now seen corresponding path program 2 times [2024-11-27 23:28:36,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:28:36,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299446262] [2024-11-27 23:28:36,668 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:28:36,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:28:36,691 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:28:36,691 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:28:37,051 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 23:28:37,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:28:37,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299446262] [2024-11-27 23:28:37,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299446262] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:28:37,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839614190] [2024-11-27 23:28:37,052 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:28:37,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:28:37,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:28:37,054 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:28:37,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-27 23:28:37,152 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:28:37,153 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:28:37,154 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-27 23:28:37,156 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:28:37,296 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 [2024-11-27 23:28:37,769 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:28:37,769 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:28:38,500 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 78 treesize of output 70 [2024-11-27 23:28:38,533 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:28:38,533 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 146 treesize of output 143 [2024-11-27 23:28:39,214 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:28:39,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839614190] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:28:39,215 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:28:39,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2024-11-27 23:28:39,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701512316] [2024-11-27 23:28:39,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:28:39,215 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-27 23:28:39,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:28:39,216 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-27 23:28:39,217 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1019, Unknown=0, NotChecked=0, Total=1190 [2024-11-27 23:28:39,494 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-11-27 23:28:39,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 194 transitions, 2199 flow. Second operand has 35 states, 35 states have (on average 10.628571428571428) internal successors, (372), 35 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:28:39,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:28:39,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-11-27 23:28:39,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:28:46,448 INFO L124 PetriNetUnfolderBase]: 4790/9914 cut-off events. [2024-11-27 23:28:46,448 INFO L125 PetriNetUnfolderBase]: For 152397/152778 co-relation queries the response was YES. [2024-11-27 23:28:46,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48950 conditions, 9914 events. 4790/9914 cut-off events. For 152397/152778 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 79414 event pairs, 459 based on Foata normal form. 762/10624 useless extension candidates. Maximal degree in co-relation 48891. Up to 1657 conditions per place. [2024-11-27 23:28:46,543 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 464 selfloop transitions, 233 changer transitions 10/717 dead transitions. [2024-11-27 23:28:46,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 717 transitions, 8310 flow [2024-11-27 23:28:46,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2024-11-27 23:28:46,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2024-11-27 23:28:46,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 971 transitions. [2024-11-27 23:28:46,547 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36177347242921015 [2024-11-27 23:28:46,547 INFO L175 Difference]: Start difference. First operand has 156 places, 194 transitions, 2199 flow. Second operand 61 states and 971 transitions. [2024-11-27 23:28:46,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 717 transitions, 8310 flow [2024-11-27 23:28:46,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 717 transitions, 7519 flow, removed 379 selfloop flow, removed 13 redundant places. [2024-11-27 23:28:46,998 INFO L231 Difference]: Finished difference. Result has 230 places, 343 transitions, 4921 flow [2024-11-27 23:28:46,998 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1656, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=4921, PETRI_PLACES=230, PETRI_TRANSITIONS=343} [2024-11-27 23:28:46,999 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 188 predicate places. [2024-11-27 23:28:46,999 INFO L471 AbstractCegarLoop]: Abstraction has has 230 places, 343 transitions, 4921 flow [2024-11-27 23:28:46,999 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 10.628571428571428) internal successors, (372), 35 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:28:46,999 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:28:46,999 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:28:47,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-27 23:28:47,203 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:28:47,204 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-27 23:28:47,204 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:28:47,204 INFO L85 PathProgramCache]: Analyzing trace with hash 191618821, now seen corresponding path program 1 times [2024-11-27 23:28:47,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:28:47,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443707114] [2024-11-27 23:28:47,204 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:28:47,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:28:47,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:28:48,107 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:28:48,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:28:48,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443707114] [2024-11-27 23:28:48,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443707114] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:28:48,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011058542] [2024-11-27 23:28:48,108 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:28:48,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:28:48,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:28:48,113 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:28:48,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-27 23:28:48,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:28:48,206 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-27 23:28:48,207 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:28:48,760 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:28:48,761 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:28:49,165 INFO L349 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2024-11-27 23:28:49,165 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 41 [2024-11-27 23:28:49,746 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:28:49,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011058542] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:28:49,747 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:28:49,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 34 [2024-11-27 23:28:49,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105688546] [2024-11-27 23:28:49,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:28:49,747 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-27 23:28:49,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:28:49,748 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-27 23:28:49,748 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=997, Unknown=0, NotChecked=0, Total=1260 [2024-11-27 23:28:50,002 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-11-27 23:28:50,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 343 transitions, 4921 flow. Second operand has 36 states, 36 states have (on average 11.527777777777779) internal successors, (415), 36 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:28:50,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:28:50,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-11-27 23:28:50,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:28:54,131 INFO L124 PetriNetUnfolderBase]: 4163/9355 cut-off events. [2024-11-27 23:28:54,131 INFO L125 PetriNetUnfolderBase]: For 185122/185707 co-relation queries the response was YES. [2024-11-27 23:28:54,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53061 conditions, 9355 events. 4163/9355 cut-off events. For 185122/185707 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 79075 event pairs, 446 based on Foata normal form. 537/9792 useless extension candidates. Maximal degree in co-relation 52976. Up to 3384 conditions per place. [2024-11-27 23:28:54,250 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 463 selfloop transitions, 222 changer transitions 15/726 dead transitions. [2024-11-27 23:28:54,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 726 transitions, 9988 flow [2024-11-27 23:28:54,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-11-27 23:28:54,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2024-11-27 23:28:54,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 807 transitions. [2024-11-27 23:28:54,255 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3668181818181818 [2024-11-27 23:28:54,255 INFO L175 Difference]: Start difference. First operand has 230 places, 343 transitions, 4921 flow. Second operand 50 states and 807 transitions. [2024-11-27 23:28:54,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 726 transitions, 9988 flow [2024-11-27 23:28:55,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 726 transitions, 8096 flow, removed 897 selfloop flow, removed 19 redundant places. [2024-11-27 23:28:55,578 INFO L231 Difference]: Finished difference. Result has 276 places, 402 transitions, 5493 flow [2024-11-27 23:28:55,579 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3806, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=5493, PETRI_PLACES=276, PETRI_TRANSITIONS=402} [2024-11-27 23:28:55,579 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 234 predicate places. [2024-11-27 23:28:55,579 INFO L471 AbstractCegarLoop]: Abstraction has has 276 places, 402 transitions, 5493 flow [2024-11-27 23:28:55,580 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 11.527777777777779) internal successors, (415), 36 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:28:55,580 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:28:55,580 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:28:55,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-27 23:28:55,780 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:28:55,781 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-27 23:28:55,781 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:28:55,781 INFO L85 PathProgramCache]: Analyzing trace with hash -587768921, now seen corresponding path program 2 times [2024-11-27 23:28:55,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:28:55,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565301420] [2024-11-27 23:28:55,781 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:28:55,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:28:55,802 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:28:55,802 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:28:56,859 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:28:56,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:28:56,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565301420] [2024-11-27 23:28:56,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565301420] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:28:56,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520404964] [2024-11-27 23:28:56,860 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:28:56,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:28:56,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:28:56,863 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:28:56,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-27 23:28:56,962 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:28:56,962 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:28:56,964 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-27 23:28:56,966 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:28:57,104 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 [2024-11-27 23:28:57,779 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:28:57,780 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:28:58,481 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 77 treesize of output 69 [2024-11-27 23:28:58,511 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:28:58,512 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 142 treesize of output 139 [2024-11-27 23:28:59,250 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:28:59,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520404964] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:28:59,250 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:28:59,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 34 [2024-11-27 23:28:59,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574016999] [2024-11-27 23:28:59,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:28:59,251 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-27 23:28:59,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:28:59,251 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-27 23:28:59,252 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1095, Unknown=0, NotChecked=0, Total=1260 [2024-11-27 23:28:59,868 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-11-27 23:28:59,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 402 transitions, 5493 flow. Second operand has 36 states, 36 states have (on average 11.527777777777779) internal successors, (415), 36 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:28:59,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:28:59,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-11-27 23:28:59,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:29:05,224 INFO L124 PetriNetUnfolderBase]: 4294/9481 cut-off events. [2024-11-27 23:29:05,224 INFO L125 PetriNetUnfolderBase]: For 199673/200432 co-relation queries the response was YES. [2024-11-27 23:29:05,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56145 conditions, 9481 events. 4294/9481 cut-off events. For 199673/200432 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 79836 event pairs, 666 based on Foata normal form. 229/9583 useless extension candidates. Maximal degree in co-relation 56045. Up to 4349 conditions per place. [2024-11-27 23:29:05,344 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 503 selfloop transitions, 147 changer transitions 8/682 dead transitions. [2024-11-27 23:29:05,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 682 transitions, 8609 flow [2024-11-27 23:29:05,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-11-27 23:29:05,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2024-11-27 23:29:05,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 698 transitions. [2024-11-27 23:29:05,347 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3525252525252525 [2024-11-27 23:29:05,347 INFO L175 Difference]: Start difference. First operand has 276 places, 402 transitions, 5493 flow. Second operand 45 states and 698 transitions. [2024-11-27 23:29:05,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 682 transitions, 8609 flow [2024-11-27 23:29:06,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 682 transitions, 8232 flow, removed 131 selfloop flow, removed 23 redundant places. [2024-11-27 23:29:06,840 INFO L231 Difference]: Finished difference. Result has 294 places, 415 transitions, 5850 flow [2024-11-27 23:29:06,840 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4943, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=5850, PETRI_PLACES=294, PETRI_TRANSITIONS=415} [2024-11-27 23:29:06,840 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 252 predicate places. [2024-11-27 23:29:06,841 INFO L471 AbstractCegarLoop]: Abstraction has has 294 places, 415 transitions, 5850 flow [2024-11-27 23:29:06,841 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 11.527777777777779) internal successors, (415), 36 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:29:06,841 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:29:06,841 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:29:06,853 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-27 23:29:07,041 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:29:07,042 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-27 23:29:07,042 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:29:07,042 INFO L85 PathProgramCache]: Analyzing trace with hash 256670507, now seen corresponding path program 3 times [2024-11-27 23:29:07,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:29:07,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126155097] [2024-11-27 23:29:07,043 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 23:29:07,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:29:07,064 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-27 23:29:07,065 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:29:07,254 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-27 23:29:07,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:29:07,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126155097] [2024-11-27 23:29:07,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126155097] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:29:07,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872764785] [2024-11-27 23:29:07,255 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 23:29:07,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:29:07,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:29:07,258 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:29:07,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-27 23:29:07,368 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-27 23:29:07,368 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:29:07,369 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-27 23:29:07,371 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:29:07,451 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-27 23:29:07,452 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:29:07,534 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-27 23:29:07,535 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 13 [2024-11-27 23:29:07,579 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-27 23:29:07,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872764785] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:29:07,580 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:29:07,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2024-11-27 23:29:07,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111776604] [2024-11-27 23:29:07,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:29:07,580 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-27 23:29:07,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:29:07,582 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-27 23:29:07,582 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-27 23:29:07,626 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-11-27 23:29:07,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 415 transitions, 5850 flow. Second operand has 13 states, 13 states have (on average 12.846153846153847) internal successors, (167), 13 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:29:07,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:29:07,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-11-27 23:29:07,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:29:12,008 INFO L124 PetriNetUnfolderBase]: 7044/14455 cut-off events. [2024-11-27 23:29:12,008 INFO L125 PetriNetUnfolderBase]: For 274404/275050 co-relation queries the response was YES. [2024-11-27 23:29:12,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83138 conditions, 14455 events. 7044/14455 cut-off events. For 274404/275050 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 121258 event pairs, 579 based on Foata normal form. 131/14554 useless extension candidates. Maximal degree in co-relation 83039. Up to 3804 conditions per place. [2024-11-27 23:29:12,177 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 500 selfloop transitions, 274 changer transitions 15/799 dead transitions. [2024-11-27 23:29:12,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 799 transitions, 12188 flow [2024-11-27 23:29:12,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-27 23:29:12,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-11-27 23:29:12,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 446 transitions. [2024-11-27 23:29:12,179 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4607438016528926 [2024-11-27 23:29:12,179 INFO L175 Difference]: Start difference. First operand has 294 places, 415 transitions, 5850 flow. Second operand 22 states and 446 transitions. [2024-11-27 23:29:12,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 799 transitions, 12188 flow [2024-11-27 23:29:14,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 799 transitions, 11973 flow, removed 61 selfloop flow, removed 32 redundant places. [2024-11-27 23:29:14,098 INFO L231 Difference]: Finished difference. Result has 298 places, 531 transitions, 8795 flow [2024-11-27 23:29:14,099 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5659, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=8795, PETRI_PLACES=298, PETRI_TRANSITIONS=531} [2024-11-27 23:29:14,099 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 256 predicate places. [2024-11-27 23:29:14,099 INFO L471 AbstractCegarLoop]: Abstraction has has 298 places, 531 transitions, 8795 flow [2024-11-27 23:29:14,099 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 12.846153846153847) internal successors, (167), 13 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:29:14,099 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:29:14,099 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:29:14,105 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-27 23:29:14,300 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:29:14,300 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-27 23:29:14,300 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:29:14,300 INFO L85 PathProgramCache]: Analyzing trace with hash 738781137, now seen corresponding path program 1 times [2024-11-27 23:29:14,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:29:14,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162372160] [2024-11-27 23:29:14,301 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:29:14,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:29:14,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:29:15,121 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:29:15,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:29:15,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162372160] [2024-11-27 23:29:15,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162372160] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:29:15,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225622376] [2024-11-27 23:29:15,121 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:29:15,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:29:15,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:29:15,123 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:29:15,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-27 23:29:15,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:29:15,209 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-27 23:29:15,211 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:29:15,635 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 23:29:15,635 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:29:16,017 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:29:16,018 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 73 [2024-11-27 23:29:16,191 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-27 23:29:16,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225622376] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:29:16,192 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:29:16,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 7] total 32 [2024-11-27 23:29:16,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619349057] [2024-11-27 23:29:16,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:29:16,192 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-27 23:29:16,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:29:16,193 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-27 23:29:16,193 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2024-11-27 23:29:16,442 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-11-27 23:29:16,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 531 transitions, 8795 flow. Second operand has 34 states, 34 states have (on average 9.911764705882353) internal successors, (337), 34 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:29:16,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:29:16,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-11-27 23:29:16,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:29:23,985 INFO L124 PetriNetUnfolderBase]: 10161/20195 cut-off events. [2024-11-27 23:29:23,985 INFO L125 PetriNetUnfolderBase]: For 412837/413535 co-relation queries the response was YES. [2024-11-27 23:29:24,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115990 conditions, 20195 events. 10161/20195 cut-off events. For 412837/413535 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 172421 event pairs, 983 based on Foata normal form. 107/20176 useless extension candidates. Maximal degree in co-relation 115872. Up to 7330 conditions per place. [2024-11-27 23:29:24,309 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 619 selfloop transitions, 289 changer transitions 28/945 dead transitions. [2024-11-27 23:29:24,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 945 transitions, 15667 flow [2024-11-27 23:29:24,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-27 23:29:24,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2024-11-27 23:29:24,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 615 transitions. [2024-11-27 23:29:24,312 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3494318181818182 [2024-11-27 23:29:24,313 INFO L175 Difference]: Start difference. First operand has 298 places, 531 transitions, 8795 flow. Second operand 40 states and 615 transitions. [2024-11-27 23:29:24,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 945 transitions, 15667 flow [2024-11-27 23:29:27,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 945 transitions, 14834 flow, removed 271 selfloop flow, removed 3 redundant places. [2024-11-27 23:29:27,596 INFO L231 Difference]: Finished difference. Result has 350 places, 635 transitions, 11275 flow [2024-11-27 23:29:27,597 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8266, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=11275, PETRI_PLACES=350, PETRI_TRANSITIONS=635} [2024-11-27 23:29:27,597 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 308 predicate places. [2024-11-27 23:29:27,597 INFO L471 AbstractCegarLoop]: Abstraction has has 350 places, 635 transitions, 11275 flow [2024-11-27 23:29:27,598 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 9.911764705882353) internal successors, (337), 34 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:29:27,598 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:29:27,598 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:29:27,603 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-27 23:29:27,798 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:29:27,798 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-27 23:29:27,799 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:29:27,799 INFO L85 PathProgramCache]: Analyzing trace with hash 956383607, now seen corresponding path program 1 times [2024-11-27 23:29:27,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:29:27,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171622270] [2024-11-27 23:29:27,799 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:29:27,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:29:27,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:29:28,577 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:29:28,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:29:28,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171622270] [2024-11-27 23:29:28,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171622270] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:29:28,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653584205] [2024-11-27 23:29:28,577 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:29:28,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:29:28,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:29:28,580 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:29:28,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-27 23:29:28,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:29:28,685 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-27 23:29:28,686 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:29:29,043 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 23:29:29,044 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:29:29,265 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:29:29,265 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 51 [2024-11-27 23:29:29,364 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-27 23:29:29,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653584205] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:29:29,364 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:29:29,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 6] total 29 [2024-11-27 23:29:29,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059358284] [2024-11-27 23:29:29,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:29:29,365 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-27 23:29:29,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:29:29,365 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-27 23:29:29,366 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2024-11-27 23:29:29,701 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-11-27 23:29:29,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 635 transitions, 11275 flow. Second operand has 31 states, 31 states have (on average 11.0) internal successors, (341), 31 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:29:29,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:29:29,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-11-27 23:29:29,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:29:37,112 INFO L124 PetriNetUnfolderBase]: 8666/18411 cut-off events. [2024-11-27 23:29:37,112 INFO L125 PetriNetUnfolderBase]: For 406510/407817 co-relation queries the response was YES. [2024-11-27 23:29:37,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115964 conditions, 18411 events. 8666/18411 cut-off events. For 406510/407817 co-relation queries the response was YES. Maximal size of possible extension queue 619. Compared 165468 event pairs, 1821 based on Foata normal form. 418/18597 useless extension candidates. Maximal degree in co-relation 115829. Up to 11656 conditions per place. [2024-11-27 23:29:37,403 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 574 selfloop transitions, 134 changer transitions 62/818 dead transitions. [2024-11-27 23:29:37,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 818 transitions, 14473 flow [2024-11-27 23:29:37,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-27 23:29:37,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-11-27 23:29:37,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 522 transitions. [2024-11-27 23:29:37,405 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.33896103896103896 [2024-11-27 23:29:37,406 INFO L175 Difference]: Start difference. First operand has 350 places, 635 transitions, 11275 flow. Second operand 35 states and 522 transitions. [2024-11-27 23:29:37,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 818 transitions, 14473 flow [2024-11-27 23:29:41,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 818 transitions, 13930 flow, removed 252 selfloop flow, removed 10 redundant places. [2024-11-27 23:29:41,017 INFO L231 Difference]: Finished difference. Result has 382 places, 629 transitions, 11238 flow [2024-11-27 23:29:41,017 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=10784, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=634, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=11238, PETRI_PLACES=382, PETRI_TRANSITIONS=629} [2024-11-27 23:29:41,017 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 340 predicate places. [2024-11-27 23:29:41,018 INFO L471 AbstractCegarLoop]: Abstraction has has 382 places, 629 transitions, 11238 flow [2024-11-27 23:29:41,018 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 11.0) internal successors, (341), 31 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:29:41,018 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:29:41,018 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:29:41,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-27 23:29:41,218 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:29:41,218 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-27 23:29:41,219 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:29:41,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1408556491, now seen corresponding path program 2 times [2024-11-27 23:29:41,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:29:41,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166886283] [2024-11-27 23:29:41,219 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:29:41,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:29:41,232 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:29:41,232 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:29:41,422 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-27 23:29:41,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:29:41,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166886283] [2024-11-27 23:29:41,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166886283] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:29:41,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345751888] [2024-11-27 23:29:41,423 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:29:41,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:29:41,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:29:41,425 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:29:41,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-27 23:29:41,525 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:29:41,525 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:29:41,531 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-27 23:29:41,533 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:29:41,730 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-27 23:29:41,731 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:29:41,927 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-11-27 23:29:41,928 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 27 treesize of output 15 [2024-11-27 23:29:41,960 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-27 23:29:41,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345751888] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:29:41,961 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:29:41,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 7] total 20 [2024-11-27 23:29:41,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411530790] [2024-11-27 23:29:41,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:29:41,961 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-27 23:29:41,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:29:41,962 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-27 23:29:41,962 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2024-11-27 23:29:42,005 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-11-27 23:29:42,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 629 transitions, 11238 flow. Second operand has 22 states, 22 states have (on average 9.772727272727273) internal successors, (215), 22 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:29:42,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:29:42,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-11-27 23:29:42,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:29:49,886 INFO L124 PetriNetUnfolderBase]: 10636/21148 cut-off events. [2024-11-27 23:29:49,886 INFO L125 PetriNetUnfolderBase]: For 489065/489803 co-relation queries the response was YES. [2024-11-27 23:29:50,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133847 conditions, 21148 events. 10636/21148 cut-off events. For 489065/489803 co-relation queries the response was YES. Maximal size of possible extension queue 659. Compared 182798 event pairs, 971 based on Foata normal form. 46/21125 useless extension candidates. Maximal degree in co-relation 133716. Up to 3885 conditions per place. [2024-11-27 23:29:50,293 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 525 selfloop transitions, 405 changer transitions 36/975 dead transitions. [2024-11-27 23:29:50,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 975 transitions, 18009 flow [2024-11-27 23:29:50,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-27 23:29:50,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-11-27 23:29:50,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 388 transitions. [2024-11-27 23:29:50,295 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3527272727272727 [2024-11-27 23:29:50,295 INFO L175 Difference]: Start difference. First operand has 382 places, 629 transitions, 11238 flow. Second operand 25 states and 388 transitions. [2024-11-27 23:29:50,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 975 transitions, 18009 flow [2024-11-27 23:29:54,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 975 transitions, 17707 flow, removed 79 selfloop flow, removed 25 redundant places. [2024-11-27 23:29:54,150 INFO L231 Difference]: Finished difference. Result has 371 places, 687 transitions, 13579 flow [2024-11-27 23:29:54,150 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=10827, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=334, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=13579, PETRI_PLACES=371, PETRI_TRANSITIONS=687} [2024-11-27 23:29:54,151 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 329 predicate places. [2024-11-27 23:29:54,151 INFO L471 AbstractCegarLoop]: Abstraction has has 371 places, 687 transitions, 13579 flow [2024-11-27 23:29:54,151 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 9.772727272727273) internal successors, (215), 22 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:29:54,151 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:29:54,151 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:29:54,157 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-27 23:29:54,352 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-27 23:29:54,352 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-27 23:29:54,352 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:29:54,352 INFO L85 PathProgramCache]: Analyzing trace with hash -715577711, now seen corresponding path program 2 times [2024-11-27 23:29:54,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:29:54,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266940084] [2024-11-27 23:29:54,353 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:29:54,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:29:54,366 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:29:54,366 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:29:54,540 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-27 23:29:54,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:29:54,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266940084] [2024-11-27 23:29:54,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266940084] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:29:54,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888108645] [2024-11-27 23:29:54,541 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:29:54,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:29:54,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:29:54,543 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:29:54,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-27 23:29:54,649 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:29:54,649 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:29:54,651 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-27 23:29:54,654 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:29:54,807 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-27 23:29:54,807 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:29:54,892 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-11-27 23:29:54,892 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 13 [2024-11-27 23:29:54,926 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-27 23:29:54,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888108645] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:29:54,927 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:29:54,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 6] total 17 [2024-11-27 23:29:54,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778321066] [2024-11-27 23:29:54,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:29:54,928 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-27 23:29:54,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:29:54,928 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-27 23:29:54,928 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2024-11-27 23:29:55,027 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-11-27 23:29:55,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 687 transitions, 13579 flow. Second operand has 19 states, 19 states have (on average 10.894736842105264) internal successors, (207), 19 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:29:55,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:29:55,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-11-27 23:29:55,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:30:01,873 INFO L124 PetriNetUnfolderBase]: 8942/18964 cut-off events. [2024-11-27 23:30:01,873 INFO L125 PetriNetUnfolderBase]: For 434297/435646 co-relation queries the response was YES. [2024-11-27 23:30:02,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123281 conditions, 18964 events. 8942/18964 cut-off events. For 434297/435646 co-relation queries the response was YES. Maximal size of possible extension queue 659. Compared 172488 event pairs, 2078 based on Foata normal form. 290/18955 useless extension candidates. Maximal degree in co-relation 123151. Up to 10968 conditions per place. [2024-11-27 23:30:02,218 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 491 selfloop transitions, 150 changer transitions 72/763 dead transitions. [2024-11-27 23:30:02,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 763 transitions, 15555 flow [2024-11-27 23:30:02,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-27 23:30:02,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-27 23:30:02,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 212 transitions. [2024-11-27 23:30:02,220 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3706293706293706 [2024-11-27 23:30:02,220 INFO L175 Difference]: Start difference. First operand has 371 places, 687 transitions, 13579 flow. Second operand 13 states and 212 transitions. [2024-11-27 23:30:02,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 763 transitions, 15555 flow [2024-11-27 23:30:06,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 763 transitions, 15096 flow, removed 221 selfloop flow, removed 4 redundant places. [2024-11-27 23:30:06,949 INFO L231 Difference]: Finished difference. Result has 375 places, 634 transitions, 12263 flow [2024-11-27 23:30:06,949 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=13154, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=687, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=12263, PETRI_PLACES=375, PETRI_TRANSITIONS=634} [2024-11-27 23:30:06,950 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 333 predicate places. [2024-11-27 23:30:06,950 INFO L471 AbstractCegarLoop]: Abstraction has has 375 places, 634 transitions, 12263 flow [2024-11-27 23:30:06,950 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 10.894736842105264) internal successors, (207), 19 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:30:06,950 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:30:06,950 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:30:06,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-27 23:30:07,150 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-27 23:30:07,151 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-27 23:30:07,151 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:30:07,151 INFO L85 PathProgramCache]: Analyzing trace with hash -885546376, now seen corresponding path program 4 times [2024-11-27 23:30:07,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:30:07,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784262917] [2024-11-27 23:30:07,151 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 23:30:07,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:30:07,165 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 23:30:07,166 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:30:07,266 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-27 23:30:07,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:30:07,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784262917] [2024-11-27 23:30:07,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784262917] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:30:07,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441773392] [2024-11-27 23:30:07,267 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 23:30:07,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:30:07,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:30:07,270 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:30:07,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_244ab222-1fbc-43e7-90a4-693a97249ef1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-27 23:30:07,384 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 23:30:07,384 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:30:07,386 INFO L256 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-27 23:30:07,387 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:30:07,450 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-27 23:30:07,450 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:30:07,662 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-27 23:30:07,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441773392] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:30:07,663 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:30:07,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 6] total 10 [2024-11-27 23:30:07,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915001804] [2024-11-27 23:30:07,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:30:07,663 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-27 23:30:07,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:30:07,664 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-27 23:30:07,665 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2024-11-27 23:30:07,665 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 44 [2024-11-27 23:30:07,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 634 transitions, 12263 flow. Second operand has 11 states, 11 states have (on average 19.0) internal successors, (209), 11 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:30:07,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:30:07,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 44 [2024-11-27 23:30:07,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand