./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU --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 14a9c1cac7f040ebf84fc8e1c821294cab75b8332a1643f6e05ef67dfff453ec --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 22:00:00,893 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 22:00:00,977 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Overflow-32bit-Automizer_Default.epf [2024-10-31 22:00:00,983 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 22:00:00,984 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 22:00:01,020 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 22:00:01,020 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 22:00:01,022 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 22:00:01,023 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 22:00:01,024 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 22:00:01,025 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 22:00:01,025 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 22:00:01,026 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 22:00:01,026 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 22:00:01,026 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 22:00:01,029 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 22:00:01,030 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-31 22:00:01,030 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 22:00:01,030 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 22:00:01,031 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 22:00:01,031 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 22:00:01,035 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-31 22:00:01,035 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 22:00:01,035 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-31 22:00:01,035 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 22:00:01,036 INFO L153 SettingsManager]: * Check absence of signed integer overflows=ASSERTandASSUME [2024-10-31 22:00:01,036 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-31 22:00:01,036 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 22:00:01,036 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-31 22:00:01,037 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 22:00:01,037 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 22:00:01,037 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 22:00:01,038 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 22:00:01,038 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 22:00:01,039 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:00:01,039 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 22:00:01,039 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 22:00:01,039 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-31 22:00:01,040 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 22:00:01,040 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 22:00:01,040 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 22:00:01,040 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 22:00:01,041 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 22:00:01,041 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 22:00:01,041 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 14a9c1cac7f040ebf84fc8e1c821294cab75b8332a1643f6e05ef67dfff453ec [2024-10-31 22:00:01,348 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 22:00:01,385 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 22:00:01,387 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 22:00:01,388 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 22:00:01,389 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 22:00:01,390 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c Unable to find full path for "g++" [2024-10-31 22:00:03,372 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 22:00:03,574 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 22:00:03,575 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c [2024-10-31 22:00:03,586 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/data/e1e322b8e/7c377fb0fb014230bf812233771a8f0c/FLAG8c9944bc1 [2024-10-31 22:00:03,606 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/data/e1e322b8e/7c377fb0fb014230bf812233771a8f0c [2024-10-31 22:00:03,609 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 22:00:03,612 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 22:00:03,615 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 22:00:03,615 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 22:00:03,621 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 22:00:03,622 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:00:03" (1/1) ... [2024-10-31 22:00:03,623 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@232c4051 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:03, skipping insertion in model container [2024-10-31 22:00:03,623 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:00:03" (1/1) ... [2024-10-31 22:00:03,655 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 22:00:03,932 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:00:03,948 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 22:00:03,988 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:00:04,010 INFO L204 MainTranslator]: Completed translation [2024-10-31 22:00:04,011 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:04 WrapperNode [2024-10-31 22:00:04,011 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 22:00:04,013 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 22:00:04,013 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 22:00:04,013 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 22:00:04,021 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:04" (1/1) ... [2024-10-31 22:00:04,030 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:04" (1/1) ... [2024-10-31 22:00:04,064 INFO L138 Inliner]: procedures = 25, calls = 27, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 168 [2024-10-31 22:00:04,068 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 22:00:04,069 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 22:00:04,069 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 22:00:04,069 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 22:00:04,082 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:04" (1/1) ... [2024-10-31 22:00:04,082 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:04" (1/1) ... [2024-10-31 22:00:04,085 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:04" (1/1) ... [2024-10-31 22:00:04,118 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 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]. [2024-10-31 22:00:04,119 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:04" (1/1) ... [2024-10-31 22:00:04,119 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:04" (1/1) ... [2024-10-31 22:00:04,125 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:04" (1/1) ... [2024-10-31 22:00:04,129 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:04" (1/1) ... [2024-10-31 22:00:04,130 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:04" (1/1) ... [2024-10-31 22:00:04,132 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:04" (1/1) ... [2024-10-31 22:00:04,135 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 22:00:04,136 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 22:00:04,136 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 22:00:04,136 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 22:00:04,137 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:04" (1/1) ... [2024-10-31 22:00:04,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:00:04,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:00:04,189 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 22:00:04,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 22:00:04,229 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 22:00:04,229 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-31 22:00:04,230 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-31 22:00:04,230 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-31 22:00:04,230 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-31 22:00:04,230 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 22:00:04,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-31 22:00:04,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-31 22:00:04,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-31 22:00:04,233 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-31 22:00:04,233 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-31 22:00:04,234 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-31 22:00:04,234 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 22:00:04,235 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 22:00:04,235 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-31 22:00:04,235 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-31 22:00:04,237 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-31 22:00:04,366 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 22:00:04,369 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 22:00:04,867 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-31 22:00:04,867 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 22:00:05,369 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 22:00:05,369 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-31 22:00:05,370 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:00:05 BoogieIcfgContainer [2024-10-31 22:00:05,370 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 22:00:05,373 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 22:00:05,373 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 22:00:05,377 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 22:00:05,378 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 10:00:03" (1/3) ... [2024-10-31 22:00:05,380 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64b994ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:00:05, skipping insertion in model container [2024-10-31 22:00:05,380 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:04" (2/3) ... [2024-10-31 22:00:05,382 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64b994ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:00:05, skipping insertion in model container [2024-10-31 22:00:05,382 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:00:05" (3/3) ... [2024-10-31 22:00:05,384 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue2.wvr.c [2024-10-31 22:00:05,400 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 22:00:05,401 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2024-10-31 22:00:05,401 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-31 22:00:05,537 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-31 22:00:05,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 46 transitions, 106 flow [2024-10-31 22:00:05,641 INFO L124 PetriNetUnfolderBase]: 3/44 cut-off events. [2024-10-31 22:00:05,643 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-31 22:00:05,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53 conditions, 44 events. 3/44 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 132 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 35. Up to 2 conditions per place. [2024-10-31 22:00:05,647 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 46 transitions, 106 flow [2024-10-31 22:00:05,654 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 46 places, 42 transitions, 93 flow [2024-10-31 22:00:05,663 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:00:05,670 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;@c1507f4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:00:05,670 INFO L334 AbstractCegarLoop]: Starting to check reachability of 36 error locations. [2024-10-31 22:00:05,673 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-31 22:00:05,674 INFO L124 PetriNetUnfolderBase]: 0/3 cut-off events. [2024-10-31 22:00:05,674 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-31 22:00:05,674 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:05,675 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-31 22:00:05,675 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2024-10-31 22:00:05,681 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:05,681 INFO L85 PathProgramCache]: Analyzing trace with hash 598642, now seen corresponding path program 1 times [2024-10-31 22:00:05,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:05,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215235820] [2024-10-31 22:00:05,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:05,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:05,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:06,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:00:06,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:06,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215235820] [2024-10-31 22:00:06,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215235820] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:00:06,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:00:06,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:00:06,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815685565] [2024-10-31 22:00:06,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:00:06,032 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:00:06,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:06,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:00:06,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:00:06,085 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 46 [2024-10-31 22:00:06,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 42 transitions, 93 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) [2024-10-31 22:00:06,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:06,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 46 [2024-10-31 22:00:06,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:00:06,407 INFO L124 PetriNetUnfolderBase]: 219/470 cut-off events. [2024-10-31 22:00:06,407 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-10-31 22:00:06,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 878 conditions, 470 events. 219/470 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 2654 event pairs, 182 based on Foata normal form. 1/305 useless extension candidates. Maximal degree in co-relation 810. Up to 377 conditions per place. [2024-10-31 22:00:06,422 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 26 selfloop transitions, 4 changer transitions 0/41 dead transitions. [2024-10-31 22:00:06,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 41 transitions, 151 flow [2024-10-31 22:00:06,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:00:06,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:00:06,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 88 transitions. [2024-10-31 22:00:06,438 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4782608695652174 [2024-10-31 22:00:06,440 INFO L175 Difference]: Start difference. First operand has 46 places, 42 transitions, 93 flow. Second operand 4 states and 88 transitions. [2024-10-31 22:00:06,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 41 transitions, 151 flow [2024-10-31 22:00:06,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 41 transitions, 146 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-31 22:00:06,446 INFO L231 Difference]: Finished difference. Result has 44 places, 41 transitions, 109 flow [2024-10-31 22:00:06,449 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=109, PETRI_PLACES=44, PETRI_TRANSITIONS=41} [2024-10-31 22:00:06,453 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, -2 predicate places. [2024-10-31 22:00:06,454 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 41 transitions, 109 flow [2024-10-31 22:00:06,454 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) [2024-10-31 22:00:06,454 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:06,454 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-10-31 22:00:06,455 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 22:00:06,455 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2024-10-31 22:00:06,456 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:06,456 INFO L85 PathProgramCache]: Analyzing trace with hash 654841567, now seen corresponding path program 1 times [2024-10-31 22:00:06,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:06,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631251433] [2024-10-31 22:00:06,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:06,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:06,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:06,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:00:06,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:06,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631251433] [2024-10-31 22:00:06,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631251433] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:00:06,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874829513] [2024-10-31 22:00:06,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:06,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:00:06,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:00:06,696 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:00:06,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 22:00:06,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:06,809 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-31 22:00:06,814 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:00:06,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:00:06,884 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 22:00:06,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874829513] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:00:06,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 22:00:06,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-10-31 22:00:06,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573680339] [2024-10-31 22:00:06,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:00:06,887 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 22:00:06,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:06,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 22:00:06,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-10-31 22:00:06,902 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 46 [2024-10-31 22:00:06,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 41 transitions, 109 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) [2024-10-31 22:00:06,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:06,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 46 [2024-10-31 22:00:06,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:00:07,277 INFO L124 PetriNetUnfolderBase]: 219/469 cut-off events. [2024-10-31 22:00:07,277 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2024-10-31 22:00:07,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 879 conditions, 469 events. 219/469 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 2662 event pairs, 182 based on Foata normal form. 1/305 useless extension candidates. Maximal degree in co-relation 852. Up to 372 conditions per place. [2024-10-31 22:00:07,284 INFO L140 encePairwiseOnDemand]: 41/46 looper letters, 22 selfloop transitions, 7 changer transitions 0/40 dead transitions. [2024-10-31 22:00:07,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 40 transitions, 163 flow [2024-10-31 22:00:07,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 22:00:07,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-31 22:00:07,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-10-31 22:00:07,290 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.391304347826087 [2024-10-31 22:00:07,291 INFO L175 Difference]: Start difference. First operand has 44 places, 41 transitions, 109 flow. Second operand 6 states and 108 transitions. [2024-10-31 22:00:07,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 40 transitions, 163 flow [2024-10-31 22:00:07,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 40 transitions, 160 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 22:00:07,294 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 116 flow [2024-10-31 22:00:07,295 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=116, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2024-10-31 22:00:07,296 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 1 predicate places. [2024-10-31 22:00:07,296 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 116 flow [2024-10-31 22:00:07,296 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) [2024-10-31 22:00:07,296 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:07,298 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-31 22:00:07,321 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-31 22:00:07,500 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:00:07,504 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2024-10-31 22:00:07,505 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:07,505 INFO L85 PathProgramCache]: Analyzing trace with hash 657169346, now seen corresponding path program 1 times [2024-10-31 22:00:07,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:07,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967731940] [2024-10-31 22:00:07,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:07,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:07,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:07,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:00:07,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:07,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967731940] [2024-10-31 22:00:07,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967731940] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:00:07,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:00:07,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-31 22:00:07,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053036434] [2024-10-31 22:00:07,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:00:07,764 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:00:07,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:07,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:00:07,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:00:07,782 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-10-31 22:00:07,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 116 flow. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:07,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:07,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-10-31 22:00:07,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:00:08,122 INFO L124 PetriNetUnfolderBase]: 313/678 cut-off events. [2024-10-31 22:00:08,122 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2024-10-31 22:00:08,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1276 conditions, 678 events. 313/678 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 3922 event pairs, 244 based on Foata normal form. 0/441 useless extension candidates. Maximal degree in co-relation 958. Up to 418 conditions per place. [2024-10-31 22:00:08,128 INFO L140 encePairwiseOnDemand]: 40/46 looper letters, 48 selfloop transitions, 5 changer transitions 2/66 dead transitions. [2024-10-31 22:00:08,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 66 transitions, 284 flow [2024-10-31 22:00:08,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:00:08,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:00:08,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-10-31 22:00:08,135 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5478260869565217 [2024-10-31 22:00:08,135 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 116 flow. Second operand 5 states and 126 transitions. [2024-10-31 22:00:08,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 66 transitions, 284 flow [2024-10-31 22:00:08,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 66 transitions, 262 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-10-31 22:00:08,143 INFO L231 Difference]: Finished difference. Result has 48 places, 42 transitions, 119 flow [2024-10-31 22:00:08,143 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=119, PETRI_PLACES=48, PETRI_TRANSITIONS=42} [2024-10-31 22:00:08,144 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 2 predicate places. [2024-10-31 22:00:08,144 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 42 transitions, 119 flow [2024-10-31 22:00:08,144 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:08,144 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:08,150 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2024-10-31 22:00:08,150 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-31 22:00:08,150 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2024-10-31 22:00:08,152 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:08,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1174747332, now seen corresponding path program 1 times [2024-10-31 22:00:08,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:08,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880086375] [2024-10-31 22:00:08,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:08,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:08,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:08,329 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:00:08,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:08,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880086375] [2024-10-31 22:00:08,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880086375] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:00:08,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692007907] [2024-10-31 22:00:08,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:08,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:00:08,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:00:08,335 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:00:08,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 22:00:08,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:08,440 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-31 22:00:08,441 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:00:08,481 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:00:08,482 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:00:08,547 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:00:08,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692007907] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:00:08,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:00:08,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2024-10-31 22:00:08,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226547851] [2024-10-31 22:00:08,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:00:08,548 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-31 22:00:08,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:08,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-31 22:00:08,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-10-31 22:00:08,569 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 46 [2024-10-31 22:00:08,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 42 transitions, 119 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) [2024-10-31 22:00:08,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:08,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 46 [2024-10-31 22:00:08,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:00:08,925 INFO L124 PetriNetUnfolderBase]: 290/642 cut-off events. [2024-10-31 22:00:08,925 INFO L125 PetriNetUnfolderBase]: For 148/148 co-relation queries the response was YES. [2024-10-31 22:00:08,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1327 conditions, 642 events. 290/642 cut-off events. For 148/148 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 3784 event pairs, 244 based on Foata normal form. 3/438 useless extension candidates. Maximal degree in co-relation 936. Up to 510 conditions per place. [2024-10-31 22:00:08,931 INFO L140 encePairwiseOnDemand]: 41/46 looper letters, 27 selfloop transitions, 13 changer transitions 0/51 dead transitions. [2024-10-31 22:00:08,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 51 transitions, 229 flow [2024-10-31 22:00:08,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-31 22:00:08,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-31 22:00:08,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-10-31 22:00:08,938 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3717391304347826 [2024-10-31 22:00:08,938 INFO L175 Difference]: Start difference. First operand has 48 places, 42 transitions, 119 flow. Second operand 10 states and 171 transitions. [2024-10-31 22:00:08,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 51 transitions, 229 flow [2024-10-31 22:00:08,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 51 transitions, 224 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:00:08,944 INFO L231 Difference]: Finished difference. Result has 58 places, 51 transitions, 188 flow [2024-10-31 22:00:08,944 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=188, PETRI_PLACES=58, PETRI_TRANSITIONS=51} [2024-10-31 22:00:08,945 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 12 predicate places. [2024-10-31 22:00:08,945 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 51 transitions, 188 flow [2024-10-31 22:00:08,946 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) [2024-10-31 22:00:08,946 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:08,946 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:08,974 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-31 22:00:09,146 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:00:09,147 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2024-10-31 22:00:09,148 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:09,148 INFO L85 PathProgramCache]: Analyzing trace with hash 169449540, now seen corresponding path program 1 times [2024-10-31 22:00:09,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:09,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710540207] [2024-10-31 22:00:09,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:09,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:09,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:09,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:00:09,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:09,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710540207] [2024-10-31 22:00:09,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710540207] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:00:09,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:00:09,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-31 22:00:09,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718182629] [2024-10-31 22:00:09,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:00:09,334 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:00:09,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:09,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:00:09,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:00:09,355 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-10-31 22:00:09,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 51 transitions, 188 flow. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:09,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:09,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-10-31 22:00:09,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:00:09,598 INFO L124 PetriNetUnfolderBase]: 268/551 cut-off events. [2024-10-31 22:00:09,598 INFO L125 PetriNetUnfolderBase]: For 124/142 co-relation queries the response was YES. [2024-10-31 22:00:09,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1167 conditions, 551 events. 268/551 cut-off events. For 124/142 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 2924 event pairs, 219 based on Foata normal form. 0/364 useless extension candidates. Maximal degree in co-relation 1131. Up to 425 conditions per place. [2024-10-31 22:00:09,604 INFO L140 encePairwiseOnDemand]: 40/46 looper letters, 35 selfloop transitions, 2 changer transitions 14/62 dead transitions. [2024-10-31 22:00:09,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 62 transitions, 325 flow [2024-10-31 22:00:09,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:00:09,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:00:09,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 113 transitions. [2024-10-31 22:00:09,609 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49130434782608695 [2024-10-31 22:00:09,609 INFO L175 Difference]: Start difference. First operand has 58 places, 51 transitions, 188 flow. Second operand 5 states and 113 transitions. [2024-10-31 22:00:09,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 62 transitions, 325 flow [2024-10-31 22:00:09,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 62 transitions, 314 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-10-31 22:00:09,613 INFO L231 Difference]: Finished difference. Result has 62 places, 48 transitions, 170 flow [2024-10-31 22:00:09,613 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=170, PETRI_PLACES=62, PETRI_TRANSITIONS=48} [2024-10-31 22:00:09,614 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 16 predicate places. [2024-10-31 22:00:09,614 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 48 transitions, 170 flow [2024-10-31 22:00:09,615 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:09,615 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:09,615 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:09,615 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-31 22:00:09,615 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2024-10-31 22:00:09,615 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:09,616 INFO L85 PathProgramCache]: Analyzing trace with hash 646558774, now seen corresponding path program 1 times [2024-10-31 22:00:09,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:09,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704536193] [2024-10-31 22:00:09,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:09,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:09,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:10,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:00:10,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:10,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704536193] [2024-10-31 22:00:10,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704536193] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:00:10,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287136219] [2024-10-31 22:00:10,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:10,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:00:10,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:00:10,042 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:00:10,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-31 22:00:10,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:10,142 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-31 22:00:10,144 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:00:10,205 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 [2024-10-31 22:00:10,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:00:10,273 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:00:10,366 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 14 treesize of output 12 [2024-10-31 22:00:10,372 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 18 treesize of output 16 [2024-10-31 22:00:10,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:00:10,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287136219] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:00:10,378 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:00:10,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-10-31 22:00:10,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081516235] [2024-10-31 22:00:10,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:00:10,379 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-31 22:00:10,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:10,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-31 22:00:10,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-10-31 22:00:10,414 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 46 [2024-10-31 22:00:10,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 48 transitions, 170 flow. Second operand has 13 states, 13 states have (on average 16.53846153846154) internal successors, (215), 13 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) [2024-10-31 22:00:10,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:10,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 46 [2024-10-31 22:00:10,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:00:10,935 INFO L124 PetriNetUnfolderBase]: 369/831 cut-off events. [2024-10-31 22:00:10,935 INFO L125 PetriNetUnfolderBase]: For 107/140 co-relation queries the response was YES. [2024-10-31 22:00:10,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1656 conditions, 831 events. 369/831 cut-off events. For 107/140 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 5232 event pairs, 86 based on Foata normal form. 0/544 useless extension candidates. Maximal degree in co-relation 1632. Up to 220 conditions per place. [2024-10-31 22:00:10,941 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 49 selfloop transitions, 15 changer transitions 0/76 dead transitions. [2024-10-31 22:00:10,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 76 transitions, 368 flow [2024-10-31 22:00:10,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 22:00:10,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-31 22:00:10,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2024-10-31 22:00:10,943 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4782608695652174 [2024-10-31 22:00:10,943 INFO L175 Difference]: Start difference. First operand has 62 places, 48 transitions, 170 flow. Second operand 8 states and 176 transitions. [2024-10-31 22:00:10,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 76 transitions, 368 flow [2024-10-31 22:00:10,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 76 transitions, 342 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-10-31 22:00:10,948 INFO L231 Difference]: Finished difference. Result has 61 places, 54 transitions, 223 flow [2024-10-31 22:00:10,948 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=223, PETRI_PLACES=61, PETRI_TRANSITIONS=54} [2024-10-31 22:00:10,949 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 15 predicate places. [2024-10-31 22:00:10,949 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 54 transitions, 223 flow [2024-10-31 22:00:10,949 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 16.53846153846154) internal successors, (215), 13 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) [2024-10-31 22:00:10,949 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:10,949 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:10,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-31 22:00:11,150 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:00:11,150 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2024-10-31 22:00:11,151 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:11,151 INFO L85 PathProgramCache]: Analyzing trace with hash 646558776, now seen corresponding path program 1 times [2024-10-31 22:00:11,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:11,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470727704] [2024-10-31 22:00:11,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:11,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:11,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:11,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:00:11,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:11,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470727704] [2024-10-31 22:00:11,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470727704] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:00:11,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:00:11,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-31 22:00:11,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289489957] [2024-10-31 22:00:11,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:00:11,257 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:00:11,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:11,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:00:11,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:00:11,258 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 46 [2024-10-31 22:00:11,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 54 transitions, 223 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) [2024-10-31 22:00:11,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:11,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 46 [2024-10-31 22:00:11,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:00:11,513 INFO L124 PetriNetUnfolderBase]: 413/920 cut-off events. [2024-10-31 22:00:11,513 INFO L125 PetriNetUnfolderBase]: For 359/359 co-relation queries the response was YES. [2024-10-31 22:00:11,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2106 conditions, 920 events. 413/920 cut-off events. For 359/359 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 5778 event pairs, 119 based on Foata normal form. 0/634 useless extension candidates. Maximal degree in co-relation 2074. Up to 579 conditions per place. [2024-10-31 22:00:11,521 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 52 selfloop transitions, 3 changer transitions 0/67 dead transitions. [2024-10-31 22:00:11,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 67 transitions, 374 flow [2024-10-31 22:00:11,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:00:11,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:00:11,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 87 transitions. [2024-10-31 22:00:11,522 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6304347826086957 [2024-10-31 22:00:11,522 INFO L175 Difference]: Start difference. First operand has 61 places, 54 transitions, 223 flow. Second operand 3 states and 87 transitions. [2024-10-31 22:00:11,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 67 transitions, 374 flow [2024-10-31 22:00:11,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 67 transitions, 364 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-31 22:00:11,528 INFO L231 Difference]: Finished difference. Result has 60 places, 56 transitions, 240 flow [2024-10-31 22:00:11,529 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=240, PETRI_PLACES=60, PETRI_TRANSITIONS=56} [2024-10-31 22:00:11,529 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 14 predicate places. [2024-10-31 22:00:11,529 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 56 transitions, 240 flow [2024-10-31 22:00:11,530 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) [2024-10-31 22:00:11,530 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:11,530 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:11,530 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-31 22:00:11,530 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2024-10-31 22:00:11,531 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:11,534 INFO L85 PathProgramCache]: Analyzing trace with hash 646558773, now seen corresponding path program 1 times [2024-10-31 22:00:11,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:11,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539016298] [2024-10-31 22:00:11,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:11,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:11,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:11,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:00:11,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:11,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539016298] [2024-10-31 22:00:11,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539016298] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:00:11,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509410420] [2024-10-31 22:00:11,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:11,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:00:11,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:00:11,853 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:00:11,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-31 22:00:11,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:11,948 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-31 22:00:11,950 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:00:11,975 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 [2024-10-31 22:00:12,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:00:12,063 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:00:12,147 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 16 treesize of output 14 [2024-10-31 22:00:12,153 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2024-10-31 22:00:12,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:00:12,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509410420] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:00:12,168 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:00:12,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2024-10-31 22:00:12,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769127832] [2024-10-31 22:00:12,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:00:12,169 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-31 22:00:12,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:12,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-31 22:00:12,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-10-31 22:00:12,196 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 46 [2024-10-31 22:00:12,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 56 transitions, 240 flow. Second operand has 11 states, 11 states have (on average 16.454545454545453) internal successors, (181), 11 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:12,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:12,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 46 [2024-10-31 22:00:12,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:00:12,691 INFO L124 PetriNetUnfolderBase]: 375/824 cut-off events. [2024-10-31 22:00:12,692 INFO L125 PetriNetUnfolderBase]: For 392/392 co-relation queries the response was YES. [2024-10-31 22:00:12,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2072 conditions, 824 events. 375/824 cut-off events. For 392/392 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 5123 event pairs, 99 based on Foata normal form. 26/647 useless extension candidates. Maximal degree in co-relation 2041. Up to 262 conditions per place. [2024-10-31 22:00:12,699 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 51 selfloop transitions, 15 changer transitions 0/78 dead transitions. [2024-10-31 22:00:12,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 78 transitions, 433 flow [2024-10-31 22:00:12,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 22:00:12,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-31 22:00:12,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 175 transitions. [2024-10-31 22:00:12,701 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47554347826086957 [2024-10-31 22:00:12,702 INFO L175 Difference]: Start difference. First operand has 60 places, 56 transitions, 240 flow. Second operand 8 states and 175 transitions. [2024-10-31 22:00:12,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 78 transitions, 433 flow [2024-10-31 22:00:12,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 78 transitions, 429 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 22:00:12,708 INFO L231 Difference]: Finished difference. Result has 66 places, 55 transitions, 263 flow [2024-10-31 22:00:12,708 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=263, PETRI_PLACES=66, PETRI_TRANSITIONS=55} [2024-10-31 22:00:12,710 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 20 predicate places. [2024-10-31 22:00:12,711 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 55 transitions, 263 flow [2024-10-31 22:00:12,713 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 16.454545454545453) internal successors, (181), 11 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:12,713 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:12,713 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:12,737 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-31 22:00:12,914 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:00:12,914 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2024-10-31 22:00:12,915 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:12,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1427253541, now seen corresponding path program 1 times [2024-10-31 22:00:12,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:12,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805529663] [2024-10-31 22:00:12,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:12,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:12,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:12,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:00:12,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:12,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805529663] [2024-10-31 22:00:12,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805529663] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:00:12,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:00:12,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:00:12,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373156614] [2024-10-31 22:00:12,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:00:12,985 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:00:12,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:12,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:00:12,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:00:12,994 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 46 [2024-10-31 22:00:12,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 55 transitions, 263 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) [2024-10-31 22:00:12,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:12,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 46 [2024-10-31 22:00:12,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:00:13,297 INFO L124 PetriNetUnfolderBase]: 479/920 cut-off events. [2024-10-31 22:00:13,298 INFO L125 PetriNetUnfolderBase]: For 729/729 co-relation queries the response was YES. [2024-10-31 22:00:13,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2524 conditions, 920 events. 479/920 cut-off events. For 729/729 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 5163 event pairs, 186 based on Foata normal form. 36/772 useless extension candidates. Maximal degree in co-relation 2490. Up to 582 conditions per place. [2024-10-31 22:00:13,304 INFO L140 encePairwiseOnDemand]: 40/46 looper letters, 66 selfloop transitions, 4 changer transitions 0/79 dead transitions. [2024-10-31 22:00:13,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 79 transitions, 469 flow [2024-10-31 22:00:13,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:00:13,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:00:13,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 106 transitions. [2024-10-31 22:00:13,307 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5760869565217391 [2024-10-31 22:00:13,307 INFO L175 Difference]: Start difference. First operand has 66 places, 55 transitions, 263 flow. Second operand 4 states and 106 transitions. [2024-10-31 22:00:13,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 79 transitions, 469 flow [2024-10-31 22:00:13,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 79 transitions, 456 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-10-31 22:00:13,311 INFO L231 Difference]: Finished difference. Result has 66 places, 56 transitions, 271 flow [2024-10-31 22:00:13,312 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=271, PETRI_PLACES=66, PETRI_TRANSITIONS=56} [2024-10-31 22:00:13,313 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 20 predicate places. [2024-10-31 22:00:13,314 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 56 transitions, 271 flow [2024-10-31 22:00:13,314 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) [2024-10-31 22:00:13,315 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:13,315 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:13,315 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-31 22:00:13,315 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2024-10-31 22:00:13,315 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:13,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1437376521, now seen corresponding path program 1 times [2024-10-31 22:00:13,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:13,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30704561] [2024-10-31 22:00:13,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:13,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:13,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:13,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:00:13,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:13,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30704561] [2024-10-31 22:00:13,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30704561] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:00:13,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222576549] [2024-10-31 22:00:13,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:13,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:00:13,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:00:13,576 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:00:13,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-31 22:00:13,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:13,685 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-31 22:00:13,687 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:00:13,729 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 [2024-10-31 22:00:13,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:00:13,806 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:00:13,887 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 14 treesize of output 12 [2024-10-31 22:00:13,893 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 18 treesize of output 16 [2024-10-31 22:00:13,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:00:13,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222576549] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:00:13,913 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:00:13,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2024-10-31 22:00:13,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720549574] [2024-10-31 22:00:13,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:00:13,915 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-31 22:00:13,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:13,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-31 22:00:13,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-10-31 22:00:13,963 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 46 [2024-10-31 22:00:13,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 56 transitions, 271 flow. Second operand has 11 states, 11 states have (on average 16.818181818181817) internal successors, (185), 11 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:13,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:13,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 46 [2024-10-31 22:00:13,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:00:14,384 INFO L124 PetriNetUnfolderBase]: 521/1113 cut-off events. [2024-10-31 22:00:14,384 INFO L125 PetriNetUnfolderBase]: For 1242/1242 co-relation queries the response was YES. [2024-10-31 22:00:14,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3102 conditions, 1113 events. 521/1113 cut-off events. For 1242/1242 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 6899 event pairs, 127 based on Foata normal form. 0/858 useless extension candidates. Maximal degree in co-relation 3069. Up to 335 conditions per place. [2024-10-31 22:00:14,394 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 65 selfloop transitions, 15 changer transitions 0/93 dead transitions. [2024-10-31 22:00:14,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 93 transitions, 647 flow [2024-10-31 22:00:14,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 22:00:14,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-31 22:00:14,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-10-31 22:00:14,396 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47282608695652173 [2024-10-31 22:00:14,396 INFO L175 Difference]: Start difference. First operand has 66 places, 56 transitions, 271 flow. Second operand 8 states and 174 transitions. [2024-10-31 22:00:14,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 93 transitions, 647 flow [2024-10-31 22:00:14,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 93 transitions, 629 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:00:14,400 INFO L231 Difference]: Finished difference. Result has 73 places, 62 transitions, 340 flow [2024-10-31 22:00:14,400 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=340, PETRI_PLACES=73, PETRI_TRANSITIONS=62} [2024-10-31 22:00:14,401 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 27 predicate places. [2024-10-31 22:00:14,401 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 62 transitions, 340 flow [2024-10-31 22:00:14,402 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 16.818181818181817) internal successors, (185), 11 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:14,402 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:14,402 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:14,423 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-31 22:00:14,602 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-31 22:00:14,602 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2024-10-31 22:00:14,603 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:14,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1437376520, now seen corresponding path program 1 times [2024-10-31 22:00:14,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:14,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939310564] [2024-10-31 22:00:14,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:14,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:14,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:14,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:00:14,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:14,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939310564] [2024-10-31 22:00:14,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939310564] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:00:14,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108043706] [2024-10-31 22:00:14,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:14,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:00:14,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:00:14,942 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:00:14,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-31 22:00:15,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:15,049 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-10-31 22:00:15,051 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:00:15,076 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 [2024-10-31 22:00:15,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:00:15,145 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:00:15,238 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 16 treesize of output 14 [2024-10-31 22:00:15,244 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2024-10-31 22:00:15,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:00:15,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108043706] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:00:15,251 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:00:15,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-10-31 22:00:15,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374425376] [2024-10-31 22:00:15,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:00:15,252 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-31 22:00:15,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:15,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-31 22:00:15,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-10-31 22:00:15,292 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 46 [2024-10-31 22:00:15,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 62 transitions, 340 flow. Second operand has 13 states, 13 states have (on average 17.0) internal successors, (221), 13 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:15,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:15,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 46 [2024-10-31 22:00:15,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:00:15,727 INFO L124 PetriNetUnfolderBase]: 486/1054 cut-off events. [2024-10-31 22:00:15,727 INFO L125 PetriNetUnfolderBase]: For 1259/1259 co-relation queries the response was YES. [2024-10-31 22:00:15,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3329 conditions, 1054 events. 486/1054 cut-off events. For 1259/1259 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 6536 event pairs, 127 based on Foata normal form. 24/852 useless extension candidates. Maximal degree in co-relation 3291. Up to 335 conditions per place. [2024-10-31 22:00:15,736 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 64 selfloop transitions, 15 changer transitions 0/92 dead transitions. [2024-10-31 22:00:15,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 92 transitions, 680 flow [2024-10-31 22:00:15,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 22:00:15,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-31 22:00:15,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 173 transitions. [2024-10-31 22:00:15,738 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4701086956521739 [2024-10-31 22:00:15,739 INFO L175 Difference]: Start difference. First operand has 73 places, 62 transitions, 340 flow. Second operand 8 states and 173 transitions. [2024-10-31 22:00:15,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 92 transitions, 680 flow [2024-10-31 22:00:15,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 92 transitions, 670 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-31 22:00:15,743 INFO L231 Difference]: Finished difference. Result has 76 places, 61 transitions, 356 flow [2024-10-31 22:00:15,744 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=356, PETRI_PLACES=76, PETRI_TRANSITIONS=61} [2024-10-31 22:00:15,744 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 30 predicate places. [2024-10-31 22:00:15,745 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 61 transitions, 356 flow [2024-10-31 22:00:15,745 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 17.0) internal successors, (221), 13 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:15,745 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:15,745 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:15,767 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-31 22:00:15,946 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-31 22:00:15,946 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2024-10-31 22:00:15,946 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:15,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1660656637, now seen corresponding path program 1 times [2024-10-31 22:00:15,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:15,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259326832] [2024-10-31 22:00:15,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:15,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:15,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:16,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:00:16,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:16,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259326832] [2024-10-31 22:00:16,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259326832] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:00:16,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:00:16,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:00:16,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671102864] [2024-10-31 22:00:16,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:00:16,005 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:00:16,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:16,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:00:16,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:00:16,014 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 46 [2024-10-31 22:00:16,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 61 transitions, 356 flow. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:16,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:16,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 46 [2024-10-31 22:00:16,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:00:16,374 INFO L124 PetriNetUnfolderBase]: 642/1176 cut-off events. [2024-10-31 22:00:16,374 INFO L125 PetriNetUnfolderBase]: For 1840/1840 co-relation queries the response was YES. [2024-10-31 22:00:16,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4165 conditions, 1176 events. 642/1176 cut-off events. For 1840/1840 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 6568 event pairs, 330 based on Foata normal form. 50/1018 useless extension candidates. Maximal degree in co-relation 4127. Up to 795 conditions per place. [2024-10-31 22:00:16,385 INFO L140 encePairwiseOnDemand]: 40/46 looper letters, 79 selfloop transitions, 4 changer transitions 0/93 dead transitions. [2024-10-31 22:00:16,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 93 transitions, 710 flow [2024-10-31 22:00:16,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:00:16,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:00:16,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 104 transitions. [2024-10-31 22:00:16,386 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5652173913043478 [2024-10-31 22:00:16,387 INFO L175 Difference]: Start difference. First operand has 76 places, 61 transitions, 356 flow. Second operand 4 states and 104 transitions. [2024-10-31 22:00:16,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 93 transitions, 710 flow [2024-10-31 22:00:16,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 93 transitions, 697 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-10-31 22:00:16,392 INFO L231 Difference]: Finished difference. Result has 76 places, 62 transitions, 364 flow [2024-10-31 22:00:16,392 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=343, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=364, PETRI_PLACES=76, PETRI_TRANSITIONS=62} [2024-10-31 22:00:16,393 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 30 predicate places. [2024-10-31 22:00:16,393 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 62 transitions, 364 flow [2024-10-31 22:00:16,393 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:16,394 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:16,394 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:16,394 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-31 22:00:16,394 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2024-10-31 22:00:16,394 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:16,395 INFO L85 PathProgramCache]: Analyzing trace with hash 846914317, now seen corresponding path program 1 times [2024-10-31 22:00:16,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:16,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7060516] [2024-10-31 22:00:16,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:16,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:16,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:16,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:00:16,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:16,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7060516] [2024-10-31 22:00:16,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7060516] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:00:16,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:00:16,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:00:16,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125897267] [2024-10-31 22:00:16,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:00:16,504 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:00:16,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:16,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:00:16,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:00:16,505 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 46 [2024-10-31 22:00:16,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 62 transitions, 364 flow. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:16,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:16,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 46 [2024-10-31 22:00:16,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:00:16,688 INFO L124 PetriNetUnfolderBase]: 367/769 cut-off events. [2024-10-31 22:00:16,688 INFO L125 PetriNetUnfolderBase]: For 1579/1579 co-relation queries the response was YES. [2024-10-31 22:00:16,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2798 conditions, 769 events. 367/769 cut-off events. For 1579/1579 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 4179 event pairs, 274 based on Foata normal form. 0/683 useless extension candidates. Maximal degree in co-relation 2761. Up to 611 conditions per place. [2024-10-31 22:00:16,696 INFO L140 encePairwiseOnDemand]: 43/46 looper letters, 43 selfloop transitions, 1 changer transitions 0/58 dead transitions. [2024-10-31 22:00:16,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 58 transitions, 424 flow [2024-10-31 22:00:16,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:00:16,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:00:16,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2024-10-31 22:00:16,698 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5072463768115942 [2024-10-31 22:00:16,698 INFO L175 Difference]: Start difference. First operand has 76 places, 62 transitions, 364 flow. Second operand 3 states and 70 transitions. [2024-10-31 22:00:16,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 58 transitions, 424 flow [2024-10-31 22:00:16,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 58 transitions, 418 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:00:16,703 INFO L231 Difference]: Finished difference. Result has 74 places, 58 transitions, 332 flow [2024-10-31 22:00:16,703 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=330, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=332, PETRI_PLACES=74, PETRI_TRANSITIONS=58} [2024-10-31 22:00:16,704 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 28 predicate places. [2024-10-31 22:00:16,704 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 58 transitions, 332 flow [2024-10-31 22:00:16,704 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:16,705 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:16,705 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:16,705 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-10-31 22:00:16,705 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2024-10-31 22:00:16,706 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:16,706 INFO L85 PathProgramCache]: Analyzing trace with hash 846914318, now seen corresponding path program 1 times [2024-10-31 22:00:16,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:16,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292874316] [2024-10-31 22:00:16,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:16,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:16,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:16,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:00:16,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:16,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292874316] [2024-10-31 22:00:16,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292874316] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:00:16,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:00:16,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:00:16,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630410095] [2024-10-31 22:00:16,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:00:16,841 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:00:16,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:16,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:00:16,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:00:16,842 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 46 [2024-10-31 22:00:16,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 58 transitions, 332 flow. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:16,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:16,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 46 [2024-10-31 22:00:16,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:00:16,971 INFO L124 PetriNetUnfolderBase]: 266/586 cut-off events. [2024-10-31 22:00:16,971 INFO L125 PetriNetUnfolderBase]: For 1210/1210 co-relation queries the response was YES. [2024-10-31 22:00:16,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2016 conditions, 586 events. 266/586 cut-off events. For 1210/1210 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2915 event pairs, 187 based on Foata normal form. 0/576 useless extension candidates. Maximal degree in co-relation 1995. Up to 444 conditions per place. [2024-10-31 22:00:16,977 INFO L140 encePairwiseOnDemand]: 43/46 looper letters, 39 selfloop transitions, 1 changer transitions 0/54 dead transitions. [2024-10-31 22:00:16,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 54 transitions, 384 flow [2024-10-31 22:00:16,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:00:16,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:00:16,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 68 transitions. [2024-10-31 22:00:16,978 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4927536231884058 [2024-10-31 22:00:16,978 INFO L175 Difference]: Start difference. First operand has 74 places, 58 transitions, 332 flow. Second operand 3 states and 68 transitions. [2024-10-31 22:00:16,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 54 transitions, 384 flow [2024-10-31 22:00:16,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 54 transitions, 383 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 22:00:16,982 INFO L231 Difference]: Finished difference. Result has 73 places, 54 transitions, 305 flow [2024-10-31 22:00:16,982 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=305, PETRI_PLACES=73, PETRI_TRANSITIONS=54} [2024-10-31 22:00:16,983 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 27 predicate places. [2024-10-31 22:00:16,983 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 54 transitions, 305 flow [2024-10-31 22:00:16,984 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:16,984 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:16,984 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:16,984 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-10-31 22:00:16,984 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2024-10-31 22:00:16,985 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:16,985 INFO L85 PathProgramCache]: Analyzing trace with hash 866604724, now seen corresponding path program 1 times [2024-10-31 22:00:16,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:16,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719505012] [2024-10-31 22:00:16,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:16,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:16,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:17,163 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:00:17,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:17,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719505012] [2024-10-31 22:00:17,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719505012] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:00:17,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546027437] [2024-10-31 22:00:17,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:17,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:00:17,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:00:17,166 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:00:17,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-31 22:00:17,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:17,271 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-31 22:00:17,272 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:00:17,424 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:00:17,424 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:00:17,559 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:00:17,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546027437] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:00:17,560 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:00:17,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2024-10-31 22:00:17,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832039835] [2024-10-31 22:00:17,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:00:17,561 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-31 22:00:17,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:17,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-31 22:00:17,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2024-10-31 22:00:17,688 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 46 [2024-10-31 22:00:17,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 54 transitions, 305 flow. Second operand has 20 states, 20 states have (on average 10.55) internal successors, (211), 20 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:17,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:17,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 46 [2024-10-31 22:00:17,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:00:18,333 INFO L124 PetriNetUnfolderBase]: 651/1301 cut-off events. [2024-10-31 22:00:18,333 INFO L125 PetriNetUnfolderBase]: For 2545/2545 co-relation queries the response was YES. [2024-10-31 22:00:18,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4430 conditions, 1301 events. 651/1301 cut-off events. For 2545/2545 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 7222 event pairs, 385 based on Foata normal form. 18/1311 useless extension candidates. Maximal degree in co-relation 4408. Up to 716 conditions per place. [2024-10-31 22:00:18,347 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 82 selfloop transitions, 16 changer transitions 8/114 dead transitions. [2024-10-31 22:00:18,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 114 transitions, 855 flow [2024-10-31 22:00:18,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-31 22:00:18,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-31 22:00:18,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-10-31 22:00:18,349 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3630434782608696 [2024-10-31 22:00:18,350 INFO L175 Difference]: Start difference. First operand has 73 places, 54 transitions, 305 flow. Second operand 10 states and 167 transitions. [2024-10-31 22:00:18,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 114 transitions, 855 flow [2024-10-31 22:00:18,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 114 transitions, 854 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 22:00:18,357 INFO L231 Difference]: Finished difference. Result has 85 places, 59 transitions, 393 flow [2024-10-31 22:00:18,357 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=393, PETRI_PLACES=85, PETRI_TRANSITIONS=59} [2024-10-31 22:00:18,358 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 39 predicate places. [2024-10-31 22:00:18,358 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 59 transitions, 393 flow [2024-10-31 22:00:18,358 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 10.55) internal successors, (211), 20 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:18,358 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:18,359 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1] [2024-10-31 22:00:18,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-10-31 22:00:18,563 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-10-31 22:00:18,564 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2024-10-31 22:00:18,564 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:18,564 INFO L85 PathProgramCache]: Analyzing trace with hash -2138803127, now seen corresponding path program 2 times [2024-10-31 22:00:18,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:18,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71154466] [2024-10-31 22:00:18,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:18,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:18,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:18,853 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:00:18,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:18,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71154466] [2024-10-31 22:00:18,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71154466] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:00:18,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775588541] [2024-10-31 22:00:18,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:00:18,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:00:18,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:00:18,858 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:00:18,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-31 22:00:19,068 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-31 22:00:19,068 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:00:19,069 INFO L255 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-31 22:00:19,070 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:00:19,127 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-10-31 22:00:19,127 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:00:19,167 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-10-31 22:00:19,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775588541] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:00:19,168 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:00:19,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 2, 2] total 12 [2024-10-31 22:00:19,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024561152] [2024-10-31 22:00:19,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:00:19,169 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-31 22:00:19,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:19,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-31 22:00:19,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2024-10-31 22:00:19,189 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 46 [2024-10-31 22:00:19,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 59 transitions, 393 flow. Second operand has 14 states, 14 states have (on average 14.142857142857142) internal successors, (198), 14 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:19,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:19,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 46 [2024-10-31 22:00:19,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:00:19,597 INFO L124 PetriNetUnfolderBase]: 426/953 cut-off events. [2024-10-31 22:00:19,597 INFO L125 PetriNetUnfolderBase]: For 2818/2845 co-relation queries the response was YES. [2024-10-31 22:00:19,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3531 conditions, 953 events. 426/953 cut-off events. For 2818/2845 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 5378 event pairs, 302 based on Foata normal form. 17/941 useless extension candidates. Maximal degree in co-relation 3504. Up to 708 conditions per place. [2024-10-31 22:00:19,608 INFO L140 encePairwiseOnDemand]: 41/46 looper letters, 29 selfloop transitions, 18 changer transitions 0/61 dead transitions. [2024-10-31 22:00:19,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 61 transitions, 503 flow [2024-10-31 22:00:19,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-31 22:00:19,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-10-31 22:00:19,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 219 transitions. [2024-10-31 22:00:19,613 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.34006211180124224 [2024-10-31 22:00:19,613 INFO L175 Difference]: Start difference. First operand has 85 places, 59 transitions, 393 flow. Second operand 14 states and 219 transitions. [2024-10-31 22:00:19,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 61 transitions, 503 flow [2024-10-31 22:00:19,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 61 transitions, 472 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-10-31 22:00:19,621 INFO L231 Difference]: Finished difference. Result has 89 places, 61 transitions, 414 flow [2024-10-31 22:00:19,621 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=76, 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=14, PETRI_FLOW=414, PETRI_PLACES=89, PETRI_TRANSITIONS=61} [2024-10-31 22:00:19,622 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 43 predicate places. [2024-10-31 22:00:19,622 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 61 transitions, 414 flow [2024-10-31 22:00:19,623 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 14.142857142857142) internal successors, (198), 14 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:19,623 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:19,623 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:19,643 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-31 22:00:19,825 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-31 22:00:19,825 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2024-10-31 22:00:19,826 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:19,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1105780607, now seen corresponding path program 1 times [2024-10-31 22:00:19,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:19,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538674072] [2024-10-31 22:00:19,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:19,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:19,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:20,037 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:00:20,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:20,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538674072] [2024-10-31 22:00:20,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538674072] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:00:20,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004479581] [2024-10-31 22:00:20,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:20,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:00:20,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:00:20,039 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:00:20,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-31 22:00:20,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:20,158 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-31 22:00:20,160 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:00:20,325 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:00:20,326 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:00:20,468 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:00:20,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004479581] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:00:20,469 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:00:20,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2024-10-31 22:00:20,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658075764] [2024-10-31 22:00:20,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:00:20,470 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-31 22:00:20,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:20,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-31 22:00:20,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2024-10-31 22:00:20,608 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 46 [2024-10-31 22:00:20,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 61 transitions, 414 flow. Second operand has 20 states, 20 states have (on average 10.65) internal successors, (213), 20 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:20,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:20,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 46 [2024-10-31 22:00:20,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:00:21,139 INFO L124 PetriNetUnfolderBase]: 565/1018 cut-off events. [2024-10-31 22:00:21,139 INFO L125 PetriNetUnfolderBase]: For 2927/2969 co-relation queries the response was YES. [2024-10-31 22:00:21,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3924 conditions, 1018 events. 565/1018 cut-off events. For 2927/2969 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 4979 event pairs, 356 based on Foata normal form. 24/1035 useless extension candidates. Maximal degree in co-relation 3900. Up to 708 conditions per place. [2024-10-31 22:00:21,149 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 35 selfloop transitions, 12 changer transitions 43/98 dead transitions. [2024-10-31 22:00:21,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 98 transitions, 829 flow [2024-10-31 22:00:21,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-31 22:00:21,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-31 22:00:21,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 155 transitions. [2024-10-31 22:00:21,152 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.33695652173913043 [2024-10-31 22:00:21,152 INFO L175 Difference]: Start difference. First operand has 89 places, 61 transitions, 414 flow. Second operand 10 states and 155 transitions. [2024-10-31 22:00:21,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 98 transitions, 829 flow [2024-10-31 22:00:21,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 98 transitions, 753 flow, removed 6 selfloop flow, removed 13 redundant places. [2024-10-31 22:00:21,160 INFO L231 Difference]: Finished difference. Result has 89 places, 55 transitions, 312 flow [2024-10-31 22:00:21,160 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=312, PETRI_PLACES=89, PETRI_TRANSITIONS=55} [2024-10-31 22:00:21,161 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 43 predicate places. [2024-10-31 22:00:21,161 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 55 transitions, 312 flow [2024-10-31 22:00:21,161 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 10.65) internal successors, (213), 20 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:21,162 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:21,162 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:21,183 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-31 22:00:21,362 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-31 22:00:21,363 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2024-10-31 22:00:21,363 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:21,363 INFO L85 PathProgramCache]: Analyzing trace with hash -97825753, now seen corresponding path program 2 times [2024-10-31 22:00:21,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:21,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426671980] [2024-10-31 22:00:21,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:21,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:21,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:21,802 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:00:21,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:21,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426671980] [2024-10-31 22:00:21,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426671980] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:00:21,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838356522] [2024-10-31 22:00:21,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:00:21,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:00:21,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:00:21,805 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:00:21,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-31 22:00:21,918 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 22:00:21,918 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:00:21,920 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-10-31 22:00:21,921 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:00:21,949 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 [2024-10-31 22:00:22,069 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:00:22,069 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:00:22,209 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2024-10-31 22:00:22,213 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 24 treesize of output 20 [2024-10-31 22:00:22,269 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:00:22,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838356522] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:00:22,270 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:00:22,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2024-10-31 22:00:22,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123026576] [2024-10-31 22:00:22,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:00:22,270 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-31 22:00:22,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:22,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-31 22:00:22,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2024-10-31 22:00:22,388 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-10-31 22:00:22,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 55 transitions, 312 flow. Second operand has 19 states, 19 states have (on average 11.368421052631579) internal successors, (216), 19 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) [2024-10-31 22:00:22,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:22,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-10-31 22:00:22,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:00:23,199 INFO L124 PetriNetUnfolderBase]: 564/1097 cut-off events. [2024-10-31 22:00:23,199 INFO L125 PetriNetUnfolderBase]: For 2937/2974 co-relation queries the response was YES. [2024-10-31 22:00:23,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4060 conditions, 1097 events. 564/1097 cut-off events. For 2937/2974 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 5685 event pairs, 86 based on Foata normal form. 18/1110 useless extension candidates. Maximal degree in co-relation 4034. Up to 276 conditions per place. [2024-10-31 22:00:23,209 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 105 selfloop transitions, 20 changer transitions 0/134 dead transitions. [2024-10-31 22:00:23,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 134 transitions, 1060 flow [2024-10-31 22:00:23,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-31 22:00:23,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-10-31 22:00:23,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 234 transitions. [2024-10-31 22:00:23,210 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.36335403726708076 [2024-10-31 22:00:23,211 INFO L175 Difference]: Start difference. First operand has 89 places, 55 transitions, 312 flow. Second operand 14 states and 234 transitions. [2024-10-31 22:00:23,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 134 transitions, 1060 flow [2024-10-31 22:00:23,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 134 transitions, 962 flow, removed 37 selfloop flow, removed 13 redundant places. [2024-10-31 22:00:23,219 INFO L231 Difference]: Finished difference. Result has 83 places, 59 transitions, 350 flow [2024-10-31 22:00:23,219 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=350, PETRI_PLACES=83, PETRI_TRANSITIONS=59} [2024-10-31 22:00:23,220 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 37 predicate places. [2024-10-31 22:00:23,220 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 59 transitions, 350 flow [2024-10-31 22:00:23,220 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 11.368421052631579) internal successors, (216), 19 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) [2024-10-31 22:00:23,220 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:23,221 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:23,244 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-31 22:00:23,425 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-10-31 22:00:23,425 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2024-10-31 22:00:23,426 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:23,426 INFO L85 PathProgramCache]: Analyzing trace with hash -97825752, now seen corresponding path program 1 times [2024-10-31 22:00:23,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:23,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229007709] [2024-10-31 22:00:23,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:23,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:23,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:23,840 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:00:23,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:23,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229007709] [2024-10-31 22:00:23,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229007709] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:00:23,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367934463] [2024-10-31 22:00:23,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:23,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:00:23,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:00:23,843 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:00:23,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-31 22:00:23,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:23,960 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-10-31 22:00:23,962 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:00:24,015 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 19 treesize of output 1 [2024-10-31 22:00:24,145 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:00:24,146 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:00:24,291 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 16 treesize of output 14 [2024-10-31 22:00:24,295 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 20 treesize of output 16 [2024-10-31 22:00:24,304 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:00:24,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367934463] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:00:24,305 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:00:24,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2024-10-31 22:00:24,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357722963] [2024-10-31 22:00:24,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:00:24,305 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-31 22:00:24,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:24,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-31 22:00:24,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2024-10-31 22:00:24,482 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-10-31 22:00:24,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 59 transitions, 350 flow. Second operand has 23 states, 23 states have (on average 11.434782608695652) internal successors, (263), 23 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:24,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:24,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-10-31 22:00:24,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:00:25,284 INFO L124 PetriNetUnfolderBase]: 536/1050 cut-off events. [2024-10-31 22:00:25,284 INFO L125 PetriNetUnfolderBase]: For 3148/3148 co-relation queries the response was YES. [2024-10-31 22:00:25,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3879 conditions, 1050 events. 536/1050 cut-off events. For 3148/3148 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 5334 event pairs, 75 based on Foata normal form. 18/1063 useless extension candidates. Maximal degree in co-relation 3859. Up to 262 conditions per place. [2024-10-31 22:00:25,293 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 104 selfloop transitions, 20 changer transitions 0/133 dead transitions. [2024-10-31 22:00:25,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 133 transitions, 1014 flow [2024-10-31 22:00:25,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-31 22:00:25,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-10-31 22:00:25,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 233 transitions. [2024-10-31 22:00:25,295 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.36180124223602483 [2024-10-31 22:00:25,295 INFO L175 Difference]: Start difference. First operand has 83 places, 59 transitions, 350 flow. Second operand 14 states and 233 transitions. [2024-10-31 22:00:25,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 133 transitions, 1014 flow [2024-10-31 22:00:25,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 133 transitions, 977 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-10-31 22:00:25,303 INFO L231 Difference]: Finished difference. Result has 87 places, 58 transitions, 345 flow [2024-10-31 22:00:25,304 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=305, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=345, PETRI_PLACES=87, PETRI_TRANSITIONS=58} [2024-10-31 22:00:25,305 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 41 predicate places. [2024-10-31 22:00:25,305 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 58 transitions, 345 flow [2024-10-31 22:00:25,305 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 11.434782608695652) internal successors, (263), 23 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:25,305 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:25,306 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:25,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-10-31 22:00:25,506 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:00:25,507 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2024-10-31 22:00:25,507 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:25,507 INFO L85 PathProgramCache]: Analyzing trace with hash -210533068, now seen corresponding path program 2 times [2024-10-31 22:00:25,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:25,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243126851] [2024-10-31 22:00:25,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:25,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:25,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:25,933 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:00:25,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:25,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243126851] [2024-10-31 22:00:25,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243126851] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:00:25,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549602121] [2024-10-31 22:00:25,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:00:25,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:00:25,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:00:25,936 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:00:25,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-31 22:00:26,046 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 22:00:26,047 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:00:26,048 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-10-31 22:00:26,050 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:00:26,076 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 [2024-10-31 22:00:26,174 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:00:26,175 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:00:26,305 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 16 treesize of output 14 [2024-10-31 22:00:26,308 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 20 treesize of output 16 [2024-10-31 22:00:26,366 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:00:26,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549602121] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:00:26,367 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:00:26,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2024-10-31 22:00:26,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235810440] [2024-10-31 22:00:26,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:00:26,368 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-31 22:00:26,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:26,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-31 22:00:26,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2024-10-31 22:00:26,485 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-10-31 22:00:26,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 58 transitions, 345 flow. Second operand has 19 states, 19 states have (on average 11.578947368421053) internal successors, (220), 19 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:26,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:26,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-10-31 22:00:26,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:00:27,151 INFO L124 PetriNetUnfolderBase]: 711/1284 cut-off events. [2024-10-31 22:00:27,151 INFO L125 PetriNetUnfolderBase]: For 5150/5150 co-relation queries the response was YES. [2024-10-31 22:00:27,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5171 conditions, 1284 events. 711/1284 cut-off events. For 5150/5150 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 6427 event pairs, 121 based on Foata normal form. 21/1294 useless extension candidates. Maximal degree in co-relation 5152. Up to 336 conditions per place. [2024-10-31 22:00:27,162 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 120 selfloop transitions, 20 changer transitions 0/149 dead transitions. [2024-10-31 22:00:27,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 149 transitions, 1376 flow [2024-10-31 22:00:27,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-31 22:00:27,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-10-31 22:00:27,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 228 transitions. [2024-10-31 22:00:27,164 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.35403726708074534 [2024-10-31 22:00:27,164 INFO L175 Difference]: Start difference. First operand has 87 places, 58 transitions, 345 flow. Second operand 14 states and 228 transitions. [2024-10-31 22:00:27,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 149 transitions, 1376 flow [2024-10-31 22:00:27,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 149 transitions, 1288 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-10-31 22:00:27,173 INFO L231 Difference]: Finished difference. Result has 91 places, 62 transitions, 404 flow [2024-10-31 22:00:27,174 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=404, PETRI_PLACES=91, PETRI_TRANSITIONS=62} [2024-10-31 22:00:27,174 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 45 predicate places. [2024-10-31 22:00:27,174 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 62 transitions, 404 flow [2024-10-31 22:00:27,175 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 11.578947368421053) internal successors, (220), 19 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:27,175 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:27,175 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:27,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-10-31 22:00:27,375 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:00:27,376 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2024-10-31 22:00:27,376 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:27,376 INFO L85 PathProgramCache]: Analyzing trace with hash 478755405, now seen corresponding path program 1 times [2024-10-31 22:00:27,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:27,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729585346] [2024-10-31 22:00:27,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:27,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:27,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:27,459 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-31 22:00:27,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:27,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729585346] [2024-10-31 22:00:27,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729585346] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:00:27,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21558337] [2024-10-31 22:00:27,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:27,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:00:27,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:00:27,464 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:00:27,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-31 22:00:27,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:27,576 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-31 22:00:27,578 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:00:27,612 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-31 22:00:27,613 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 22:00:27,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21558337] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:00:27,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 22:00:27,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2024-10-31 22:00:27,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516146446] [2024-10-31 22:00:27,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:00:27,614 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 22:00:27,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:27,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 22:00:27,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-10-31 22:00:27,631 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 46 [2024-10-31 22:00:27,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 62 transitions, 404 flow. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:27,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:27,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 46 [2024-10-31 22:00:27,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:00:28,003 INFO L124 PetriNetUnfolderBase]: 661/1290 cut-off events. [2024-10-31 22:00:28,004 INFO L125 PetriNetUnfolderBase]: For 5396/5396 co-relation queries the response was YES. [2024-10-31 22:00:28,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5269 conditions, 1290 events. 661/1290 cut-off events. For 5396/5396 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 6786 event pairs, 65 based on Foata normal form. 48/1335 useless extension candidates. Maximal degree in co-relation 5248. Up to 402 conditions per place. [2024-10-31 22:00:28,014 INFO L140 encePairwiseOnDemand]: 41/46 looper letters, 108 selfloop transitions, 9 changer transitions 0/126 dead transitions. [2024-10-31 22:00:28,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 126 transitions, 1160 flow [2024-10-31 22:00:28,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 22:00:28,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-31 22:00:28,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 136 transitions. [2024-10-31 22:00:28,016 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4927536231884058 [2024-10-31 22:00:28,016 INFO L175 Difference]: Start difference. First operand has 91 places, 62 transitions, 404 flow. Second operand 6 states and 136 transitions. [2024-10-31 22:00:28,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 126 transitions, 1160 flow [2024-10-31 22:00:28,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 126 transitions, 1060 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-10-31 22:00:28,023 INFO L231 Difference]: Finished difference. Result has 86 places, 61 transitions, 382 flow [2024-10-31 22:00:28,024 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=382, PETRI_PLACES=86, PETRI_TRANSITIONS=61} [2024-10-31 22:00:28,024 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 40 predicate places. [2024-10-31 22:00:28,024 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 61 transitions, 382 flow [2024-10-31 22:00:28,024 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:28,025 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:28,025 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:28,045 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-10-31 22:00:28,229 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-10-31 22:00:28,229 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2024-10-31 22:00:28,233 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:28,233 INFO L85 PathProgramCache]: Analyzing trace with hash -210533067, now seen corresponding path program 1 times [2024-10-31 22:00:28,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:28,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021690121] [2024-10-31 22:00:28,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:28,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:28,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:28,642 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:00:28,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:28,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021690121] [2024-10-31 22:00:28,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021690121] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:00:28,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297271889] [2024-10-31 22:00:28,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:28,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:00:28,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:00:28,645 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:00:28,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-31 22:00:28,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:28,761 INFO L255 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-10-31 22:00:28,767 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:00:28,821 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 19 treesize of output 1 [2024-10-31 22:00:28,972 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:00:28,973 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:00:29,128 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2024-10-31 22:00:29,134 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 24 treesize of output 20 [2024-10-31 22:00:29,149 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:00:29,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297271889] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:00:29,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:00:29,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2024-10-31 22:00:29,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495190427] [2024-10-31 22:00:29,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:00:29,150 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-31 22:00:29,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:29,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-31 22:00:29,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2024-10-31 22:00:29,327 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-10-31 22:00:29,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 61 transitions, 382 flow. Second operand has 23 states, 23 states have (on average 11.695652173913043) internal successors, (269), 23 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:29,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:29,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-10-31 22:00:29,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:00:30,211 INFO L124 PetriNetUnfolderBase]: 676/1226 cut-off events. [2024-10-31 22:00:30,211 INFO L125 PetriNetUnfolderBase]: For 5717/5717 co-relation queries the response was YES. [2024-10-31 22:00:30,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5249 conditions, 1226 events. 676/1226 cut-off events. For 5717/5717 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 6034 event pairs, 121 based on Foata normal form. 21/1236 useless extension candidates. Maximal degree in co-relation 5230. Up to 332 conditions per place. [2024-10-31 22:00:30,222 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 119 selfloop transitions, 20 changer transitions 0/147 dead transitions. [2024-10-31 22:00:30,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 147 transitions, 1404 flow [2024-10-31 22:00:30,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-31 22:00:30,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-10-31 22:00:30,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 227 transitions. [2024-10-31 22:00:30,224 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.35248447204968947 [2024-10-31 22:00:30,224 INFO L175 Difference]: Start difference. First operand has 86 places, 61 transitions, 382 flow. Second operand 14 states and 227 transitions. [2024-10-31 22:00:30,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 147 transitions, 1404 flow [2024-10-31 22:00:30,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 147 transitions, 1266 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-10-31 22:00:30,233 INFO L231 Difference]: Finished difference. Result has 93 places, 60 transitions, 392 flow [2024-10-31 22:00:30,233 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=352, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=392, PETRI_PLACES=93, PETRI_TRANSITIONS=60} [2024-10-31 22:00:30,234 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 47 predicate places. [2024-10-31 22:00:30,234 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 60 transitions, 392 flow [2024-10-31 22:00:30,234 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 11.695652173913043) internal successors, (269), 23 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:30,234 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:30,235 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:30,254 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-10-31 22:00:30,439 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-10-31 22:00:30,439 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2024-10-31 22:00:30,440 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:30,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1956516286, now seen corresponding path program 1 times [2024-10-31 22:00:30,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:30,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700038128] [2024-10-31 22:00:30,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:30,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:30,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:30,517 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-31 22:00:30,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:30,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700038128] [2024-10-31 22:00:30,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700038128] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:00:30,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079239570] [2024-10-31 22:00:30,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:30,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:00:30,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:00:30,520 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:00:30,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3751a638-f0d2-4c8b-aa1c-a683682f7ab6/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-31 22:00:30,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:30,631 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-31 22:00:30,632 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:00:30,666 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-31 22:00:30,666 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:00:30,713 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-31 22:00:30,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079239570] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:00:30,714 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:00:30,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-10-31 22:00:30,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075852560] [2024-10-31 22:00:30,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:00:30,715 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-31 22:00:30,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:30,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-31 22:00:30,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-10-31 22:00:30,743 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 46 [2024-10-31 22:00:30,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 60 transitions, 392 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) [2024-10-31 22:00:30,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:30,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 46 [2024-10-31 22:00:30,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand