./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d50ef4b-0f9a-42ab-8e3c-69014f36606c/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d50ef4b-0f9a-42ab-8e3c-69014f36606c/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d50ef4b-0f9a-42ab-8e3c-69014f36606c/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d50ef4b-0f9a-42ab-8e3c-69014f36606c/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d50ef4b-0f9a-42ab-8e3c-69014f36606c/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d50ef4b-0f9a-42ab-8e3c-69014f36606c/bin/uautomizer-verify-BQ2R08f2Ya --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0224e82797c7b26c7800eaf85be5e5678e7961d21aa4e2312eda2860d261b33a --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-28 20:27:10,078 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-28 20:27:10,135 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d50ef4b-0f9a-42ab-8e3c-69014f36606c/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-11-28 20:27:10,141 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-28 20:27:10,141 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-28 20:27:10,164 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-28 20:27:10,165 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-28 20:27:10,165 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-28 20:27:10,166 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-28 20:27:10,167 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-28 20:27:10,167 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-28 20:27:10,168 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-28 20:27:10,169 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-28 20:27:10,169 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-28 20:27:10,170 INFO L153 SettingsManager]: * Use SBE=true [2023-11-28 20:27:10,170 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-28 20:27:10,171 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-28 20:27:10,171 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-28 20:27:10,172 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-28 20:27:10,172 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-28 20:27:10,173 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-28 20:27:10,173 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-28 20:27:10,174 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-28 20:27:10,174 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-28 20:27:10,175 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-28 20:27:10,175 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-28 20:27:10,176 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-28 20:27:10,176 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-28 20:27:10,176 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-28 20:27:10,177 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-28 20:27:10,177 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-28 20:27:10,178 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-28 20:27:10,178 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-28 20:27:10,178 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 20:27:10,179 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-28 20:27:10,179 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-28 20:27:10,179 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-28 20:27:10,179 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-28 20:27:10,179 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-28 20:27:10,179 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-28 20:27:10,180 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-28 20:27:10,180 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-28 20:27:10,180 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-28 20:27:10,180 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-28 20:27:10,181 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_6d50ef4b-0f9a-42ab-8e3c-69014f36606c/bin/uautomizer-verify-BQ2R08f2Ya/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d50ef4b-0f9a-42ab-8e3c-69014f36606c/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0224e82797c7b26c7800eaf85be5e5678e7961d21aa4e2312eda2860d261b33a [2023-11-28 20:27:10,378 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-28 20:27:10,399 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-28 20:27:10,401 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-28 20:27:10,403 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-28 20:27:10,403 INFO L274 PluginConnector]: CDTParser initialized [2023-11-28 20:27:10,404 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d50ef4b-0f9a-42ab-8e3c-69014f36606c/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c [2023-11-28 20:27:13,163 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-28 20:27:13,345 INFO L384 CDTParser]: Found 1 translation units. [2023-11-28 20:27:13,346 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d50ef4b-0f9a-42ab-8e3c-69014f36606c/sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c [2023-11-28 20:27:13,353 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d50ef4b-0f9a-42ab-8e3c-69014f36606c/bin/uautomizer-verify-BQ2R08f2Ya/data/ddda25ae5/682a96e515d84a6ca03a725c98131a21/FLAG670e8c565 [2023-11-28 20:27:13,366 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d50ef4b-0f9a-42ab-8e3c-69014f36606c/bin/uautomizer-verify-BQ2R08f2Ya/data/ddda25ae5/682a96e515d84a6ca03a725c98131a21 [2023-11-28 20:27:13,368 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-28 20:27:13,370 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-28 20:27:13,371 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-28 20:27:13,371 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-28 20:27:13,375 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-28 20:27:13,376 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:27:13" (1/1) ... [2023-11-28 20:27:13,377 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33e298a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:27:13, skipping insertion in model container [2023-11-28 20:27:13,377 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:27:13" (1/1) ... [2023-11-28 20:27:13,405 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-28 20:27:13,609 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 20:27:13,620 INFO L202 MainTranslator]: Completed pre-run [2023-11-28 20:27:13,650 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 20:27:13,658 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-28 20:27:13,658 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-28 20:27:13,666 INFO L206 MainTranslator]: Completed translation [2023-11-28 20:27:13,667 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:27:13 WrapperNode [2023-11-28 20:27:13,667 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-28 20:27:13,668 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-28 20:27:13,668 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-28 20:27:13,668 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-28 20:27:13,676 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:27:13" (1/1) ... [2023-11-28 20:27:13,686 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:27:13" (1/1) ... [2023-11-28 20:27:13,711 INFO L138 Inliner]: procedures = 24, calls = 44, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 109 [2023-11-28 20:27:13,711 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-28 20:27:13,712 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-28 20:27:13,712 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-28 20:27:13,712 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-28 20:27:13,723 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:27:13" (1/1) ... [2023-11-28 20:27:13,723 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:27:13" (1/1) ... [2023-11-28 20:27:13,727 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:27:13" (1/1) ... [2023-11-28 20:27:13,744 INFO L175 MemorySlicer]: Split 15 memory accesses to 5 slices as follows [2, 2, 7, 2, 2]. 47 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 4 writes are split as follows [0, 1, 1, 1, 1]. [2023-11-28 20:27:13,744 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:27:13" (1/1) ... [2023-11-28 20:27:13,744 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:27:13" (1/1) ... [2023-11-28 20:27:13,755 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:27:13" (1/1) ... [2023-11-28 20:27:13,759 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:27:13" (1/1) ... [2023-11-28 20:27:13,761 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:27:13" (1/1) ... [2023-11-28 20:27:13,763 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:27:13" (1/1) ... [2023-11-28 20:27:13,767 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-28 20:27:13,768 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-28 20:27:13,768 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-28 20:27:13,768 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-28 20:27:13,769 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:27:13" (1/1) ... [2023-11-28 20:27:13,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 20:27:13,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d50ef4b-0f9a-42ab-8e3c-69014f36606c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:27:13,796 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d50ef4b-0f9a-42ab-8e3c-69014f36606c/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-28 20:27:13,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d50ef4b-0f9a-42ab-8e3c-69014f36606c/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-28 20:27:13,835 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-28 20:27:13,835 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-28 20:27:13,835 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-28 20:27:13,835 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-28 20:27:13,835 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-28 20:27:13,835 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-28 20:27:13,835 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-28 20:27:13,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-28 20:27:13,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-28 20:27:13,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-28 20:27:13,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-28 20:27:13,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-28 20:27:13,836 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-28 20:27:13,837 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-28 20:27:13,837 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-28 20:27:13,837 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-28 20:27:13,837 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-28 20:27:13,837 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-28 20:27:13,837 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-28 20:27:13,838 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-28 20:27:13,838 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-28 20:27:13,838 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-28 20:27:13,838 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-28 20:27:13,838 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-28 20:27:13,838 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-28 20:27:13,839 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-28 20:27:13,839 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-28 20:27:13,839 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-28 20:27:13,839 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-28 20:27:13,841 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-28 20:27:13,963 INFO L241 CfgBuilder]: Building ICFG [2023-11-28 20:27:13,965 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-28 20:27:14,260 INFO L282 CfgBuilder]: Performing block encoding [2023-11-28 20:27:14,469 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-28 20:27:14,470 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-28 20:27:14,470 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:27:14 BoogieIcfgContainer [2023-11-28 20:27:14,470 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-28 20:27:14,473 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-28 20:27:14,473 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-28 20:27:14,477 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-28 20:27:14,478 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 08:27:13" (1/3) ... [2023-11-28 20:27:14,478 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a153392 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:27:14, skipping insertion in model container [2023-11-28 20:27:14,479 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:27:13" (2/3) ... [2023-11-28 20:27:14,479 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a153392 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:27:14, skipping insertion in model container [2023-11-28 20:27:14,479 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:27:14" (3/3) ... [2023-11-28 20:27:14,480 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-min-array-hom.wvr.c [2023-11-28 20:27:14,490 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-28 20:27:14,499 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-28 20:27:14,499 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2023-11-28 20:27:14,500 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-28 20:27:14,559 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-28 20:27:14,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 49 transitions, 119 flow [2023-11-28 20:27:14,637 INFO L124 PetriNetUnfolderBase]: 4/46 cut-off events. [2023-11-28 20:27:14,637 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-28 20:27:14,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59 conditions, 46 events. 4/46 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 100 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2023-11-28 20:27:14,642 INFO L82 GeneralOperation]: Start removeDead. Operand has 55 places, 49 transitions, 119 flow [2023-11-28 20:27:14,645 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 44 transitions, 103 flow [2023-11-28 20:27:14,655 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-28 20:27:14,661 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@31a6423b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-28 20:27:14,662 INFO L358 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2023-11-28 20:27:14,667 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-28 20:27:14,667 INFO L124 PetriNetUnfolderBase]: 0/3 cut-off events. [2023-11-28 20:27:14,667 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-28 20:27:14,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:27:14,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-28 20:27:14,669 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 14 more)] === [2023-11-28 20:27:14,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:27:14,675 INFO L85 PathProgramCache]: Analyzing trace with hash 488644, now seen corresponding path program 1 times [2023-11-28 20:27:14,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:27:14,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375789678] [2023-11-28 20:27:14,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:27:14,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:27:14,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:27:14,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:27:14,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:27:14,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375789678] [2023-11-28 20:27:14,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375789678] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:27:14,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:27:14,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-28 20:27:14,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010564932] [2023-11-28 20:27:14,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:27:14,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 20:27:14,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:27:15,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 20:27:15,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-28 20:27:15,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2023-11-28 20:27:15,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 44 transitions, 103 flow. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:27:15,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:27:15,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2023-11-28 20:27:15,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:27:15,318 INFO L124 PetriNetUnfolderBase]: 467/874 cut-off events. [2023-11-28 20:27:15,318 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2023-11-28 20:27:15,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1623 conditions, 874 events. 467/874 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 4482 event pairs, 333 based on Foata normal form. 1/810 useless extension candidates. Maximal degree in co-relation 1350. Up to 681 conditions per place. [2023-11-28 20:27:15,333 INFO L140 encePairwiseOnDemand]: 43/49 looper letters, 27 selfloop transitions, 4 changer transitions 0/47 dead transitions. [2023-11-28 20:27:15,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 47 transitions, 171 flow [2023-11-28 20:27:15,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 20:27:15,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-28 20:27:15,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 109 transitions. [2023-11-28 20:27:15,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5561224489795918 [2023-11-28 20:27:15,347 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 109 transitions. [2023-11-28 20:27:15,348 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 109 transitions. [2023-11-28 20:27:15,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:27:15,352 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 109 transitions. [2023-11-28 20:27:15,354 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:27:15,358 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:27:15,359 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:27:15,361 INFO L175 Difference]: Start difference. First operand has 50 places, 44 transitions, 103 flow. Second operand 4 states and 109 transitions. [2023-11-28 20:27:15,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 47 transitions, 171 flow [2023-11-28 20:27:15,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 47 transitions, 162 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-28 20:27:15,368 INFO L231 Difference]: Finished difference. Result has 50 places, 47 transitions, 123 flow [2023-11-28 20:27:15,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=123, PETRI_PLACES=50, PETRI_TRANSITIONS=47} [2023-11-28 20:27:15,374 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 0 predicate places. [2023-11-28 20:27:15,374 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 47 transitions, 123 flow [2023-11-28 20:27:15,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:27:15,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:27:15,375 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-28 20:27:15,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-28 20:27:15,376 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 14 more)] === [2023-11-28 20:27:15,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:27:15,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1672769589, now seen corresponding path program 1 times [2023-11-28 20:27:15,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:27:15,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182897147] [2023-11-28 20:27:15,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:27:15,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:27:15,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:27:15,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:27:15,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:27:15,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182897147] [2023-11-28 20:27:15,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182897147] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:27:15,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842370986] [2023-11-28 20:27:15,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:27:15,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:27:15,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d50ef4b-0f9a-42ab-8e3c-69014f36606c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:27:15,523 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d50ef4b-0f9a-42ab-8e3c-69014f36606c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:27:15,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d50ef4b-0f9a-42ab-8e3c-69014f36606c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-28 20:27:15,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:27:15,624 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-28 20:27:15,627 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:27:15,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:27:15,669 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:27:15,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842370986] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:27:15,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-28 20:27:15,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-11-28 20:27:15,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349145608] [2023-11-28 20:27:15,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:27:15,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-28 20:27:15,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:27:15,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-28 20:27:15,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-28 20:27:15,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2023-11-28 20:27:15,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 47 transitions, 123 flow. Second operand has 6 states, 6 states have (on average 19.833333333333332) internal successors, (119), 6 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:27:15,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:27:15,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2023-11-28 20:27:15,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:27:15,915 INFO L124 PetriNetUnfolderBase]: 467/873 cut-off events. [2023-11-28 20:27:15,915 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-11-28 20:27:15,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1607 conditions, 873 events. 467/873 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 4478 event pairs, 333 based on Foata normal form. 1/810 useless extension candidates. Maximal degree in co-relation 1580. Up to 676 conditions per place. [2023-11-28 20:27:15,926 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 23 selfloop transitions, 7 changer transitions 0/46 dead transitions. [2023-11-28 20:27:15,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 46 transitions, 179 flow [2023-11-28 20:27:15,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-28 20:27:15,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-28 20:27:15,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2023-11-28 20:27:15,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4931972789115646 [2023-11-28 20:27:15,929 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 145 transitions. [2023-11-28 20:27:15,929 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 145 transitions. [2023-11-28 20:27:15,929 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:27:15,930 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 145 transitions. [2023-11-28 20:27:15,931 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 24.166666666666668) internal successors, (145), 6 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:27:15,933 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 49.0) internal successors, (343), 7 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:27:15,933 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 49.0) internal successors, (343), 7 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:27:15,933 INFO L175 Difference]: Start difference. First operand has 50 places, 47 transitions, 123 flow. Second operand 6 states and 145 transitions. [2023-11-28 20:27:15,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 46 transitions, 179 flow [2023-11-28 20:27:15,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 46 transitions, 176 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-28 20:27:15,936 INFO L231 Difference]: Finished difference. Result has 53 places, 46 transitions, 130 flow [2023-11-28 20:27:15,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=130, PETRI_PLACES=53, PETRI_TRANSITIONS=46} [2023-11-28 20:27:15,937 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 3 predicate places. [2023-11-28 20:27:15,938 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 46 transitions, 130 flow [2023-11-28 20:27:15,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.833333333333332) internal successors, (119), 6 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:27:15,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:27:15,938 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2023-11-28 20:27:15,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d50ef4b-0f9a-42ab-8e3c-69014f36606c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-28 20:27:16,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d50ef4b-0f9a-42ab-8e3c-69014f36606c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:27:16,140 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 14 more)] === [2023-11-28 20:27:16,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:27:16,141 INFO L85 PathProgramCache]: Analyzing trace with hash 316250188, now seen corresponding path program 1 times [2023-11-28 20:27:16,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:27:16,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10465091] [2023-11-28 20:27:16,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:27:16,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:27:16,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:27:16,334 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:27:16,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:27:16,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10465091] [2023-11-28 20:27:16,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10465091] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:27:16,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016016167] [2023-11-28 20:27:16,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:27:16,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:27:16,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d50ef4b-0f9a-42ab-8e3c-69014f36606c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:27:16,337 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d50ef4b-0f9a-42ab-8e3c-69014f36606c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:27:16,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d50ef4b-0f9a-42ab-8e3c-69014f36606c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-28 20:27:16,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:27:16,433 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-28 20:27:16,434 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:27:16,461 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:27:16,461 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:27:16,507 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:27:16,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016016167] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:27:16,508 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:27:16,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-11-28 20:27:16,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698781571] [2023-11-28 20:27:16,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:27:16,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-28 20:27:16,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:27:16,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-28 20:27:16,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-28 20:27:16,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2023-11-28 20:27:16,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 46 transitions, 130 flow. Second operand has 12 states, 12 states have (on average 20.083333333333332) internal successors, (241), 12 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:27:16,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:27:16,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2023-11-28 20:27:16,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:27:16,767 INFO L124 PetriNetUnfolderBase]: 470/885 cut-off events. [2023-11-28 20:27:16,767 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2023-11-28 20:27:16,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1651 conditions, 885 events. 470/885 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 4569 event pairs, 333 based on Foata normal form. 3/822 useless extension candidates. Maximal degree in co-relation 1581. Up to 683 conditions per place. [2023-11-28 20:27:16,776 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 26 selfloop transitions, 13 changer transitions 0/55 dead transitions. [2023-11-28 20:27:16,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 55 transitions, 262 flow [2023-11-28 20:27:16,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-28 20:27:16,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-28 20:27:16,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 232 transitions. [2023-11-28 20:27:16,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47346938775510206 [2023-11-28 20:27:16,780 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 232 transitions. [2023-11-28 20:27:16,780 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 232 transitions. [2023-11-28 20:27:16,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:27:16,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 232 transitions. [2023-11-28 20:27:16,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 23.2) internal successors, (232), 10 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:27:16,784 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 49.0) internal successors, (539), 11 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:27:16,785 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 49.0) internal successors, (539), 11 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:27:16,785 INFO L175 Difference]: Start difference. First operand has 53 places, 46 transitions, 130 flow. Second operand 10 states and 232 transitions. [2023-11-28 20:27:16,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 55 transitions, 262 flow [2023-11-28 20:27:16,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 55 transitions, 216 flow, removed 8 selfloop flow, removed 5 redundant places. [2023-11-28 20:27:16,788 INFO L231 Difference]: Finished difference. Result has 60 places, 55 transitions, 182 flow [2023-11-28 20:27:16,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=182, PETRI_PLACES=60, PETRI_TRANSITIONS=55} [2023-11-28 20:27:16,789 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 10 predicate places. [2023-11-28 20:27:16,790 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 55 transitions, 182 flow [2023-11-28 20:27:16,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 20.083333333333332) internal successors, (241), 12 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:27:16,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:27:16,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:27:16,797 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d50ef4b-0f9a-42ab-8e3c-69014f36606c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-28 20:27:16,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d50ef4b-0f9a-42ab-8e3c-69014f36606c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:27:16,991 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 14 more)] === [2023-11-28 20:27:16,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:27:16,992 INFO L85 PathProgramCache]: Analyzing trace with hash -828421432, now seen corresponding path program 1 times [2023-11-28 20:27:16,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:27:16,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940550149] [2023-11-28 20:27:16,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:27:16,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:27:17,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:27:17,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:27:17,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:27:17,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940550149] [2023-11-28 20:27:17,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940550149] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:27:17,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:27:17,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 20:27:17,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541566205] [2023-11-28 20:27:17,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:27:17,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 20:27:17,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:27:17,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 20:27:17,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-28 20:27:17,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2023-11-28 20:27:17,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 55 transitions, 182 flow. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:27:17,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:27:17,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2023-11-28 20:27:17,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:27:17,369 INFO L124 PetriNetUnfolderBase]: 1100/1898 cut-off events. [2023-11-28 20:27:17,369 INFO L125 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2023-11-28 20:27:17,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3600 conditions, 1898 events. 1100/1898 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 10439 event pairs, 467 based on Foata normal form. 42/1844 useless extension candidates. Maximal degree in co-relation 3566. Up to 1152 conditions per place. [2023-11-28 20:27:17,384 INFO L140 encePairwiseOnDemand]: 43/49 looper letters, 67 selfloop transitions, 4 changer transitions 0/85 dead transitions. [2023-11-28 20:27:17,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 85 transitions, 390 flow [2023-11-28 20:27:17,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 20:27:17,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-28 20:27:17,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 133 transitions. [2023-11-28 20:27:17,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6785714285714286 [2023-11-28 20:27:17,386 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 133 transitions. [2023-11-28 20:27:17,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 133 transitions. [2023-11-28 20:27:17,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:27:17,387 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 133 transitions. [2023-11-28 20:27:17,388 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:27:17,389 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:27:17,389 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:27:17,389 INFO L175 Difference]: Start difference. First operand has 60 places, 55 transitions, 182 flow. Second operand 4 states and 133 transitions. [2023-11-28 20:27:17,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 85 transitions, 390 flow [2023-11-28 20:27:17,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 85 transitions, 379 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-28 20:27:17,393 INFO L231 Difference]: Finished difference. Result has 63 places, 58 transitions, 200 flow [2023-11-28 20:27:17,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=200, PETRI_PLACES=63, PETRI_TRANSITIONS=58} [2023-11-28 20:27:17,395 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 13 predicate places. [2023-11-28 20:27:17,395 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 58 transitions, 200 flow [2023-11-28 20:27:17,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:27:17,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:27:17,395 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:27:17,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-28 20:27:17,396 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 14 more)] === [2023-11-28 20:27:17,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:27:17,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1786839766, now seen corresponding path program 1 times [2023-11-28 20:27:17,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:27:17,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882306868] [2023-11-28 20:27:17,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:27:17,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:27:17,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:27:17,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:27:17,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:27:17,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882306868] [2023-11-28 20:27:17,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882306868] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:27:17,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:27:17,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 20:27:17,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971411349] [2023-11-28 20:27:17,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:27:17,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 20:27:17,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:27:17,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 20:27:17,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-28 20:27:17,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2023-11-28 20:27:17,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 58 transitions, 200 flow. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:27:17,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:27:17,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2023-11-28 20:27:17,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:27:17,919 INFO L124 PetriNetUnfolderBase]: 1796/2971 cut-off events. [2023-11-28 20:27:17,920 INFO L125 PetriNetUnfolderBase]: For 769/1064 co-relation queries the response was YES. [2023-11-28 20:27:17,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6362 conditions, 2971 events. 1796/2971 cut-off events. For 769/1064 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 16896 event pairs, 901 based on Foata normal form. 167/2987 useless extension candidates. Maximal degree in co-relation 6326. Up to 1794 conditions per place. [2023-11-28 20:27:17,947 INFO L140 encePairwiseOnDemand]: 43/49 looper letters, 73 selfloop transitions, 4 changer transitions 0/92 dead transitions. [2023-11-28 20:27:17,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 92 transitions, 454 flow [2023-11-28 20:27:17,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 20:27:17,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-28 20:27:17,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 133 transitions. [2023-11-28 20:27:17,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6785714285714286 [2023-11-28 20:27:17,949 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 133 transitions. [2023-11-28 20:27:17,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 133 transitions. [2023-11-28 20:27:17,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:27:17,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 133 transitions. [2023-11-28 20:27:17,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:27:17,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:27:17,952 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:27:17,952 INFO L175 Difference]: Start difference. First operand has 63 places, 58 transitions, 200 flow. Second operand 4 states and 133 transitions. [2023-11-28 20:27:17,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 92 transitions, 454 flow [2023-11-28 20:27:17,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 92 transitions, 445 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-28 20:27:17,957 INFO L231 Difference]: Finished difference. Result has 67 places, 61 transitions, 226 flow [2023-11-28 20:27:17,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=226, PETRI_PLACES=67, PETRI_TRANSITIONS=61} [2023-11-28 20:27:17,958 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 17 predicate places. [2023-11-28 20:27:17,958 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 61 transitions, 226 flow [2023-11-28 20:27:17,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:27:17,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:27:17,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:27:17,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-28 20:27:17,959 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 14 more)] === [2023-11-28 20:27:17,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:27:17,960 INFO L85 PathProgramCache]: Analyzing trace with hash -2140939290, now seen corresponding path program 1 times [2023-11-28 20:27:17,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:27:17,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855921857] [2023-11-28 20:27:17,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:27:17,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:27:17,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:27:18,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:27:18,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:27:18,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855921857] [2023-11-28 20:27:18,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855921857] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:27:18,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:27:18,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-28 20:27:18,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357092792] [2023-11-28 20:27:18,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:27:18,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:27:18,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:27:18,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:27:18,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:27:18,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 49 [2023-11-28 20:27:18,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 61 transitions, 226 flow. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:27:18,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:27:18,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 49 [2023-11-28 20:27:18,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:27:18,385 INFO L124 PetriNetUnfolderBase]: 1115/1976 cut-off events. [2023-11-28 20:27:18,385 INFO L125 PetriNetUnfolderBase]: For 806/1119 co-relation queries the response was YES. [2023-11-28 20:27:18,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4469 conditions, 1976 events. 1115/1976 cut-off events. For 806/1119 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 11408 event pairs, 765 based on Foata normal form. 110/1959 useless extension candidates. Maximal degree in co-relation 4438. Up to 1553 conditions per place. [2023-11-28 20:27:18,408 INFO L140 encePairwiseOnDemand]: 46/49 looper letters, 39 selfloop transitions, 2 changer transitions 0/60 dead transitions. [2023-11-28 20:27:18,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 60 transitions, 305 flow [2023-11-28 20:27:18,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:27:18,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-28 20:27:18,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 92 transitions. [2023-11-28 20:27:18,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6258503401360545 [2023-11-28 20:27:18,410 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 92 transitions. [2023-11-28 20:27:18,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 92 transitions. [2023-11-28 20:27:18,410 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:27:18,410 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 92 transitions. [2023-11-28 20:27:18,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:27:18,411 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:27:18,411 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:27:18,412 INFO L175 Difference]: Start difference. First operand has 67 places, 61 transitions, 226 flow. Second operand 3 states and 92 transitions. [2023-11-28 20:27:18,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 60 transitions, 305 flow [2023-11-28 20:27:18,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 60 transitions, 302 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-28 20:27:18,416 INFO L231 Difference]: Finished difference. Result has 68 places, 60 transitions, 224 flow [2023-11-28 20:27:18,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=224, PETRI_PLACES=68, PETRI_TRANSITIONS=60} [2023-11-28 20:27:18,417 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 18 predicate places. [2023-11-28 20:27:18,418 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 60 transitions, 224 flow [2023-11-28 20:27:18,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:27:18,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:27:18,418 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:27:18,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-28 20:27:18,419 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 14 more)] === [2023-11-28 20:27:18,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:27:18,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1418473365, now seen corresponding path program 1 times [2023-11-28 20:27:18,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:27:18,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819940821] [2023-11-28 20:27:18,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:27:18,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:27:18,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:27:18,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 20:27:18,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:27:18,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819940821] [2023-11-28 20:27:18,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819940821] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:27:18,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:27:18,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-28 20:27:18,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875152006] [2023-11-28 20:27:18,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:27:18,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-28 20:27:18,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:27:18,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-28 20:27:18,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-28 20:27:18,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2023-11-28 20:27:18,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 60 transitions, 224 flow. Second operand has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:27:18,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:27:18,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2023-11-28 20:27:18,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:27:18,893 INFO L124 PetriNetUnfolderBase]: 1579/2472 cut-off events. [2023-11-28 20:27:18,894 INFO L125 PetriNetUnfolderBase]: For 948/1380 co-relation queries the response was YES. [2023-11-28 20:27:18,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5757 conditions, 2472 events. 1579/2472 cut-off events. For 948/1380 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 12903 event pairs, 405 based on Foata normal form. 235/2578 useless extension candidates. Maximal degree in co-relation 5733. Up to 821 conditions per place. [2023-11-28 20:27:18,909 INFO L140 encePairwiseOnDemand]: 43/49 looper letters, 69 selfloop transitions, 8 changer transitions 0/93 dead transitions. [2023-11-28 20:27:18,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 93 transitions, 488 flow [2023-11-28 20:27:18,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-28 20:27:18,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-28 20:27:18,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 145 transitions. [2023-11-28 20:27:18,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5918367346938775 [2023-11-28 20:27:18,911 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 145 transitions. [2023-11-28 20:27:18,911 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 145 transitions. [2023-11-28 20:27:18,912 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:27:18,912 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 145 transitions. [2023-11-28 20:27:18,912 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 29.0) internal successors, (145), 5 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:27:18,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 49.0) internal successors, (294), 6 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:27:18,913 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 49.0) internal successors, (294), 6 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:27:18,913 INFO L175 Difference]: Start difference. First operand has 68 places, 60 transitions, 224 flow. Second operand 5 states and 145 transitions. [2023-11-28 20:27:18,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 93 transitions, 488 flow [2023-11-28 20:27:18,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 93 transitions, 484 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-28 20:27:18,917 INFO L231 Difference]: Finished difference. Result has 69 places, 59 transitions, 234 flow [2023-11-28 20:27:18,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=234, PETRI_PLACES=69, PETRI_TRANSITIONS=59} [2023-11-28 20:27:18,918 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 19 predicate places. [2023-11-28 20:27:18,919 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 59 transitions, 234 flow [2023-11-28 20:27:18,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:27:18,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:27:18,919 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1] [2023-11-28 20:27:18,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-28 20:27:18,919 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 14 more)] === [2023-11-28 20:27:18,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:27:18,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1289947357, now seen corresponding path program 2 times [2023-11-28 20:27:18,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:27:18,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881731874] [2023-11-28 20:27:18,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:27:18,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:27:18,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:27:19,069 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:27:19,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:27:19,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881731874] [2023-11-28 20:27:19,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881731874] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:27:19,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731497530] [2023-11-28 20:27:19,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 20:27:19,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:27:19,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d50ef4b-0f9a-42ab-8e3c-69014f36606c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:27:19,071 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d50ef4b-0f9a-42ab-8e3c-69014f36606c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:27:19,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d50ef4b-0f9a-42ab-8e3c-69014f36606c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-28 20:27:19,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-28 20:27:19,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:27:19,162 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-28 20:27:19,163 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:27:19,217 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-28 20:27:19,218 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:27:19,259 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-28 20:27:19,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731497530] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:27:19,260 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:27:19,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 2, 2] total 12 [2023-11-28 20:27:19,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516090456] [2023-11-28 20:27:19,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:27:19,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-28 20:27:19,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:27:19,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-28 20:27:19,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-11-28 20:27:19,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2023-11-28 20:27:19,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 59 transitions, 234 flow. Second operand has 14 states, 14 states have (on average 20.142857142857142) internal successors, (282), 14 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:27:19,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:27:19,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2023-11-28 20:27:19,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:27:19,670 INFO L124 PetriNetUnfolderBase]: 1116/1811 cut-off events. [2023-11-28 20:27:19,670 INFO L125 PetriNetUnfolderBase]: For 870/1146 co-relation queries the response was YES. [2023-11-28 20:27:19,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4501 conditions, 1811 events. 1116/1811 cut-off events. For 870/1146 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 9377 event pairs, 765 based on Foata normal form. 99/1778 useless extension candidates. Maximal degree in co-relation 4462. Up to 1545 conditions per place. [2023-11-28 20:27:19,683 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 26 selfloop transitions, 18 changer transitions 0/61 dead transitions. [2023-11-28 20:27:19,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 61 transitions, 330 flow [2023-11-28 20:27:19,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-28 20:27:19,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-28 20:27:19,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 308 transitions. [2023-11-28 20:27:19,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2023-11-28 20:27:19,686 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 308 transitions. [2023-11-28 20:27:19,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 308 transitions. [2023-11-28 20:27:19,686 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:27:19,686 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 308 transitions. [2023-11-28 20:27:19,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 22.0) internal successors, (308), 14 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:27:19,689 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 49.0) internal successors, (735), 15 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:27:19,689 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 49.0) internal successors, (735), 15 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:27:19,689 INFO L175 Difference]: Start difference. First operand has 69 places, 59 transitions, 234 flow. Second operand 14 states and 308 transitions. [2023-11-28 20:27:19,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 61 transitions, 330 flow [2023-11-28 20:27:19,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 61 transitions, 300 flow, removed 2 selfloop flow, removed 8 redundant places. [2023-11-28 20:27:19,692 INFO L231 Difference]: Finished difference. Result has 73 places, 61 transitions, 248 flow [2023-11-28 20:27:19,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=60, 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=248, PETRI_PLACES=73, PETRI_TRANSITIONS=61} [2023-11-28 20:27:19,693 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 23 predicate places. [2023-11-28 20:27:19,693 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 61 transitions, 248 flow [2023-11-28 20:27:19,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 20.142857142857142) internal successors, (282), 14 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:27:19,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:27:19,694 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:27:19,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d50ef4b-0f9a-42ab-8e3c-69014f36606c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-28 20:27:19,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d50ef4b-0f9a-42ab-8e3c-69014f36606c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-28 20:27:19,896 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 14 more)] === [2023-11-28 20:27:19,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:27:19,897 INFO L85 PathProgramCache]: Analyzing trace with hash -427199221, now seen corresponding path program 1 times [2023-11-28 20:27:19,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:27:19,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205059295] [2023-11-28 20:27:19,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:27:19,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:27:19,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:27:20,065 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 20:27:20,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:27:20,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205059295] [2023-11-28 20:27:20,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205059295] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:27:20,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903755171] [2023-11-28 20:27:20,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:27:20,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:27:20,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d50ef4b-0f9a-42ab-8e3c-69014f36606c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:27:20,068 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d50ef4b-0f9a-42ab-8e3c-69014f36606c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:27:20,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d50ef4b-0f9a-42ab-8e3c-69014f36606c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-28 20:27:20,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:27:20,165 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-28 20:27:20,166 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:27:20,319 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:27:20,320 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:27:20,472 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:27:20,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903755171] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:27:20,473 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:27:20,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 8] total 19 [2023-11-28 20:27:20,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907770331] [2023-11-28 20:27:20,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:27:20,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-28 20:27:20,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:27:20,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-28 20:27:20,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2023-11-28 20:27:20,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 49 [2023-11-28 20:27:20,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 61 transitions, 248 flow. Second operand has 19 states, 19 states have (on average 17.0) internal successors, (323), 19 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:27:20,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:27:20,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 49 [2023-11-28 20:27:20,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:27:21,657 INFO L124 PetriNetUnfolderBase]: 3100/4790 cut-off events. [2023-11-28 20:27:21,657 INFO L125 PetriNetUnfolderBase]: For 1469/1951 co-relation queries the response was YES. [2023-11-28 20:27:21,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11366 conditions, 4790 events. 3100/4790 cut-off events. For 1469/1951 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 27290 event pairs, 538 based on Foata normal form. 294/4939 useless extension candidates. Maximal degree in co-relation 6822. Up to 716 conditions per place. [2023-11-28 20:27:21,689 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 157 selfloop transitions, 25 changer transitions 0/194 dead transitions. [2023-11-28 20:27:21,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 194 transitions, 995 flow [2023-11-28 20:27:21,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-28 20:27:21,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-28 20:27:21,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 367 transitions. [2023-11-28 20:27:21,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5349854227405247 [2023-11-28 20:27:21,692 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 367 transitions. [2023-11-28 20:27:21,692 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 367 transitions. [2023-11-28 20:27:21,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:27:21,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 367 transitions. [2023-11-28 20:27:21,694 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 26.214285714285715) internal successors, (367), 14 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:27:21,695 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 49.0) internal successors, (735), 15 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:27:21,695 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 49.0) internal successors, (735), 15 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:27:21,696 INFO L175 Difference]: Start difference. First operand has 73 places, 61 transitions, 248 flow. Second operand 14 states and 367 transitions. [2023-11-28 20:27:21,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 194 transitions, 995 flow [2023-11-28 20:27:21,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 194 transitions, 927 flow, removed 6 selfloop flow, removed 12 redundant places. [2023-11-28 20:27:21,703 INFO L231 Difference]: Finished difference. Result has 74 places, 65 transitions, 252 flow [2023-11-28 20:27:21,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=60, 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=252, PETRI_PLACES=74, PETRI_TRANSITIONS=65} [2023-11-28 20:27:21,704 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 24 predicate places. [2023-11-28 20:27:21,705 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 65 transitions, 252 flow [2023-11-28 20:27:21,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 17.0) internal successors, (323), 19 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:27:21,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:27:21,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:27:21,710 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d50ef4b-0f9a-42ab-8e3c-69014f36606c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-28 20:27:21,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d50ef4b-0f9a-42ab-8e3c-69014f36606c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:27:21,906 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread3Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 14 more)] === [2023-11-28 20:27:21,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:27:21,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1023001883, now seen corresponding path program 1 times [2023-11-28 20:27:21,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:27:21,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834777407] [2023-11-28 20:27:21,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:27:21,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:27:21,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:27:22,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:27:22,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:27:22,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834777407] [2023-11-28 20:27:22,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834777407] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:27:22,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852751771] [2023-11-28 20:27:22,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:27:22,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:27:22,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d50ef4b-0f9a-42ab-8e3c-69014f36606c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:27:22,065 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d50ef4b-0f9a-42ab-8e3c-69014f36606c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:27:22,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d50ef4b-0f9a-42ab-8e3c-69014f36606c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-28 20:27:22,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:27:22,175 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-28 20:27:22,177 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:27:22,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 20:27:22,272 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:27:22,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852751771] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:27:22,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-28 20:27:22,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2023-11-28 20:27:22,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994922535] [2023-11-28 20:27:22,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:27:22,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-28 20:27:22,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:27:22,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-28 20:27:22,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2023-11-28 20:27:22,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2023-11-28 20:27:22,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 65 transitions, 252 flow. Second operand has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:27:22,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:27:22,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2023-11-28 20:27:22,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:27:22,918 INFO L124 PetriNetUnfolderBase]: 3428/5068 cut-off events. [2023-11-28 20:27:22,918 INFO L125 PetriNetUnfolderBase]: For 4097/4638 co-relation queries the response was YES. [2023-11-28 20:27:22,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13002 conditions, 5068 events. 3428/5068 cut-off events. For 4097/4638 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 27590 event pairs, 1074 based on Foata normal form. 171/4843 useless extension candidates. Maximal degree in co-relation 7734. Up to 2223 conditions per place. [2023-11-28 20:27:22,942 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 77 selfloop transitions, 11 changer transitions 6/108 dead transitions. [2023-11-28 20:27:22,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 108 transitions, 626 flow [2023-11-28 20:27:22,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-28 20:27:22,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-28 20:27:22,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2023-11-28 20:27:22,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5408163265306123 [2023-11-28 20:27:22,944 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 159 transitions. [2023-11-28 20:27:22,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 159 transitions. [2023-11-28 20:27:22,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:27:22,944 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 159 transitions. [2023-11-28 20:27:22,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 26.5) internal successors, (159), 6 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:27:22,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 49.0) internal successors, (343), 7 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:27:22,946 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 49.0) internal successors, (343), 7 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:27:22,946 INFO L175 Difference]: Start difference. First operand has 74 places, 65 transitions, 252 flow. Second operand 6 states and 159 transitions. [2023-11-28 20:27:22,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 108 transitions, 626 flow [2023-11-28 20:27:22,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 108 transitions, 561 flow, removed 7 selfloop flow, removed 7 redundant places. [2023-11-28 20:27:22,952 INFO L231 Difference]: Finished difference. Result has 73 places, 64 transitions, 251 flow [2023-11-28 20:27:22,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=251, PETRI_PLACES=73, PETRI_TRANSITIONS=64} [2023-11-28 20:27:22,953 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 23 predicate places. [2023-11-28 20:27:22,953 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 64 transitions, 251 flow [2023-11-28 20:27:22,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:27:22,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:27:22,954 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:27:22,959 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d50ef4b-0f9a-42ab-8e3c-69014f36606c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-28 20:27:23,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d50ef4b-0f9a-42ab-8e3c-69014f36606c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-28 20:27:23,159 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 14 more)] === [2023-11-28 20:27:23,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:27:23,160 INFO L85 PathProgramCache]: Analyzing trace with hash -211690682, now seen corresponding path program 1 times [2023-11-28 20:27:23,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:27:23,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047947632] [2023-11-28 20:27:23,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:27:23,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:27:23,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:27:23,292 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-28 20:27:23,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:27:23,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047947632] [2023-11-28 20:27:23,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047947632] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:27:23,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896874470] [2023-11-28 20:27:23,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:27:23,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:27:23,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d50ef4b-0f9a-42ab-8e3c-69014f36606c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:27:23,294 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d50ef4b-0f9a-42ab-8e3c-69014f36606c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:27:23,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d50ef4b-0f9a-42ab-8e3c-69014f36606c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-28 20:27:23,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:27:23,401 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-28 20:27:23,403 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:27:23,488 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-28 20:27:23,488 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:27:23,574 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-28 20:27:23,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896874470] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:27:23,574 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:27:23,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2023-11-28 20:27:23,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256603295] [2023-11-28 20:27:23,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:27:23,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-28 20:27:23,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:27:23,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-28 20:27:23,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2023-11-28 20:27:23,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2023-11-28 20:27:23,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 64 transitions, 251 flow. Second operand has 16 states, 16 states have (on average 19.6875) internal successors, (315), 16 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:27:23,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:27:23,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2023-11-28 20:27:23,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:27:24,258 INFO L124 PetriNetUnfolderBase]: 2571/4238 cut-off events. [2023-11-28 20:27:24,258 INFO L125 PetriNetUnfolderBase]: For 3403/3617 co-relation queries the response was YES. [2023-11-28 20:27:24,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11311 conditions, 4238 events. 2571/4238 cut-off events. For 3403/3617 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 24859 event pairs, 1834 based on Foata normal form. 85/4220 useless extension candidates. Maximal degree in co-relation 7213. Up to 2919 conditions per place. [2023-11-28 20:27:24,278 INFO L140 encePairwiseOnDemand]: 42/49 looper letters, 31 selfloop transitions, 12 changer transitions 37/95 dead transitions. [2023-11-28 20:27:24,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 95 transitions, 520 flow [2023-11-28 20:27:24,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-28 20:27:24,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-28 20:27:24,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2023-11-28 20:27:24,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5255102040816326 [2023-11-28 20:27:24,280 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 206 transitions. [2023-11-28 20:27:24,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 206 transitions. [2023-11-28 20:27:24,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:27:24,281 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 206 transitions. [2023-11-28 20:27:24,281 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 25.75) internal successors, (206), 8 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:27:24,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 49.0) internal successors, (441), 9 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:27:24,283 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 49.0) internal successors, (441), 9 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:27:24,283 INFO L175 Difference]: Start difference. First operand has 73 places, 64 transitions, 251 flow. Second operand 8 states and 206 transitions. [2023-11-28 20:27:24,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 95 transitions, 520 flow [2023-11-28 20:27:24,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 95 transitions, 509 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-28 20:27:24,290 INFO L231 Difference]: Finished difference. Result has 77 places, 58 transitions, 243 flow [2023-11-28 20:27:24,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=243, PETRI_PLACES=77, PETRI_TRANSITIONS=58} [2023-11-28 20:27:24,291 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 27 predicate places. [2023-11-28 20:27:24,291 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 58 transitions, 243 flow [2023-11-28 20:27:24,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 19.6875) internal successors, (315), 16 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:27:24,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:27:24,291 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-28 20:27:24,296 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d50ef4b-0f9a-42ab-8e3c-69014f36606c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-28 20:27:24,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d50ef4b-0f9a-42ab-8e3c-69014f36606c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:27:24,492 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 14 more)] === [2023-11-28 20:27:24,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:27:24,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1012453380, now seen corresponding path program 1 times [2023-11-28 20:27:24,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:27:24,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127515930] [2023-11-28 20:27:24,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:27:24,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:27:24,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:27:24,570 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-28 20:27:24,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:27:24,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127515930] [2023-11-28 20:27:24,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127515930] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:27:24,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176564741] [2023-11-28 20:27:24,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:27:24,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:27:24,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d50ef4b-0f9a-42ab-8e3c-69014f36606c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:27:24,572 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d50ef4b-0f9a-42ab-8e3c-69014f36606c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:27:24,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d50ef4b-0f9a-42ab-8e3c-69014f36606c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-28 20:27:24,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:27:24,673 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-28 20:27:24,675 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:27:24,706 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-28 20:27:24,706 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:27:24,750 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-28 20:27:24,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176564741] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:27:24,751 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:27:24,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-28 20:27:24,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556473010] [2023-11-28 20:27:24,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:27:24,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-28 20:27:24,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:27:24,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-28 20:27:24,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-28 20:27:24,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2023-11-28 20:27:24,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 58 transitions, 243 flow. Second operand has 12 states, 12 states have (on average 19.916666666666668) internal successors, (239), 12 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:27:24,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:27:24,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2023-11-28 20:27:24,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:27:25,567 INFO L124 PetriNetUnfolderBase]: 4277/6787 cut-off events. [2023-11-28 20:27:25,567 INFO L125 PetriNetUnfolderBase]: For 6331/7506 co-relation queries the response was YES. [2023-11-28 20:27:25,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18402 conditions, 6787 events. 4277/6787 cut-off events. For 6331/7506 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 38617 event pairs, 913 based on Foata normal form. 553/7317 useless extension candidates. Maximal degree in co-relation 18326. Up to 2477 conditions per place. [2023-11-28 20:27:25,599 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 173 selfloop transitions, 13 changer transitions 0/199 dead transitions. [2023-11-28 20:27:25,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 199 transitions, 1153 flow [2023-11-28 20:27:25,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-28 20:27:25,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-28 20:27:25,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 329 transitions. [2023-11-28 20:27:25,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6714285714285714 [2023-11-28 20:27:25,602 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 329 transitions. [2023-11-28 20:27:25,602 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 329 transitions. [2023-11-28 20:27:25,602 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:27:25,602 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 329 transitions. [2023-11-28 20:27:25,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 32.9) internal successors, (329), 10 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:27:25,605 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 49.0) internal successors, (539), 11 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:27:25,605 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 49.0) internal successors, (539), 11 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:27:25,605 INFO L175 Difference]: Start difference. First operand has 77 places, 58 transitions, 243 flow. Second operand 10 states and 329 transitions. [2023-11-28 20:27:25,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 199 transitions, 1153 flow [2023-11-28 20:27:25,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 199 transitions, 1074 flow, removed 20 selfloop flow, removed 9 redundant places. [2023-11-28 20:27:25,620 INFO L231 Difference]: Finished difference. Result has 75 places, 67 transitions, 282 flow [2023-11-28 20:27:25,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=282, PETRI_PLACES=75, PETRI_TRANSITIONS=67} [2023-11-28 20:27:25,621 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 25 predicate places. [2023-11-28 20:27:25,621 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 67 transitions, 282 flow [2023-11-28 20:27:25,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 19.916666666666668) internal successors, (239), 12 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:27:25,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:27:25,622 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:27:25,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d50ef4b-0f9a-42ab-8e3c-69014f36606c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-28 20:27:25,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d50ef4b-0f9a-42ab-8e3c-69014f36606c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:27:25,823 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 14 more)] === [2023-11-28 20:27:25,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:27:25,824 INFO L85 PathProgramCache]: Analyzing trace with hash -668831819, now seen corresponding path program 2 times [2023-11-28 20:27:25,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:27:25,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409186796] [2023-11-28 20:27:25,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:27:25,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:27:25,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:27:25,903 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-28 20:27:25,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:27:25,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409186796] [2023-11-28 20:27:25,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409186796] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:27:25,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572813272] [2023-11-28 20:27:25,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 20:27:25,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:27:25,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d50ef4b-0f9a-42ab-8e3c-69014f36606c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:27:25,905 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d50ef4b-0f9a-42ab-8e3c-69014f36606c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:27:25,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d50ef4b-0f9a-42ab-8e3c-69014f36606c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-28 20:27:26,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 20:27:26,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:27:26,028 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-28 20:27:26,029 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:27:26,058 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-28 20:27:26,058 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:27:26,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572813272] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:27:26,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-28 20:27:26,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2023-11-28 20:27:26,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956697398] [2023-11-28 20:27:26,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:27:26,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-28 20:27:26,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:27:26,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-28 20:27:26,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-28 20:27:26,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2023-11-28 20:27:26,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 67 transitions, 282 flow. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:27:26,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:27:26,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2023-11-28 20:27:26,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:27:26,811 INFO L124 PetriNetUnfolderBase]: 5244/7753 cut-off events. [2023-11-28 20:27:26,811 INFO L125 PetriNetUnfolderBase]: For 9634/10147 co-relation queries the response was YES. [2023-11-28 20:27:26,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22513 conditions, 7753 events. 5244/7753 cut-off events. For 9634/10147 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 43331 event pairs, 599 based on Foata normal form. 176/7725 useless extension candidates. Maximal degree in co-relation 18360. Up to 3145 conditions per place. [2023-11-28 20:27:26,847 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 89 selfloop transitions, 7 changer transitions 0/110 dead transitions. [2023-11-28 20:27:26,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 110 transitions, 690 flow [2023-11-28 20:27:26,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 20:27:26,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-28 20:27:26,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 122 transitions. [2023-11-28 20:27:26,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6224489795918368 [2023-11-28 20:27:26,848 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 122 transitions. [2023-11-28 20:27:26,848 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 122 transitions. [2023-11-28 20:27:26,848 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:27:26,848 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 122 transitions. [2023-11-28 20:27:26,849 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:27:26,850 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:27:26,850 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:27:26,850 INFO L175 Difference]: Start difference. First operand has 75 places, 67 transitions, 282 flow. Second operand 4 states and 122 transitions. [2023-11-28 20:27:26,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 110 transitions, 690 flow [2023-11-28 20:27:26,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 110 transitions, 661 flow, removed 9 selfloop flow, removed 2 redundant places. [2023-11-28 20:27:26,863 INFO L231 Difference]: Finished difference. Result has 75 places, 66 transitions, 281 flow [2023-11-28 20:27:26,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=281, PETRI_PLACES=75, PETRI_TRANSITIONS=66} [2023-11-28 20:27:26,864 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 25 predicate places. [2023-11-28 20:27:26,864 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 66 transitions, 281 flow [2023-11-28 20:27:26,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:27:26,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:27:26,865 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:27:26,871 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d50ef4b-0f9a-42ab-8e3c-69014f36606c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-28 20:27:27,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d50ef4b-0f9a-42ab-8e3c-69014f36606c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-28 20:27:27,068 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 14 more)] === [2023-11-28 20:27:27,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:27:27,068 INFO L85 PathProgramCache]: Analyzing trace with hash 741050610, now seen corresponding path program 1 times [2023-11-28 20:27:27,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:27:27,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490233810] [2023-11-28 20:27:27,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:27:27,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:27:27,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:27:27,148 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-28 20:27:27,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:27:27,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490233810] [2023-11-28 20:27:27,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490233810] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:27:27,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956058501] [2023-11-28 20:27:27,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:27:27,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:27:27,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d50ef4b-0f9a-42ab-8e3c-69014f36606c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:27:27,150 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d50ef4b-0f9a-42ab-8e3c-69014f36606c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:27:27,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d50ef4b-0f9a-42ab-8e3c-69014f36606c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-28 20:27:27,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:27:27,267 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-28 20:27:27,269 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:27:27,450 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:27:27,450 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:27:27,651 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:27:27,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956058501] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:27:27,652 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:27:27,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 10, 10] total 24 [2023-11-28 20:27:27,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616974565] [2023-11-28 20:27:27,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:27:27,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-28 20:27:27,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:27:27,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-28 20:27:27,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2023-11-28 20:27:27,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 49 [2023-11-28 20:27:27,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 66 transitions, 281 flow. Second operand has 24 states, 24 states have (on average 17.041666666666668) internal successors, (409), 24 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:27:27,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:27:27,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 49 [2023-11-28 20:27:27,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:27:29,748 INFO L124 PetriNetUnfolderBase]: 10790/15996 cut-off events. [2023-11-28 20:27:29,748 INFO L125 PetriNetUnfolderBase]: For 21152/22230 co-relation queries the response was YES. [2023-11-28 20:27:29,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48056 conditions, 15996 events. 10790/15996 cut-off events. For 21152/22230 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 99737 event pairs, 3073 based on Foata normal form. 352/16206 useless extension candidates. Maximal degree in co-relation 39372. Up to 4470 conditions per place. [2023-11-28 20:27:29,831 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 235 selfloop transitions, 25 changer transitions 7/281 dead transitions. [2023-11-28 20:27:29,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 281 transitions, 1794 flow [2023-11-28 20:27:29,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-28 20:27:29,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-28 20:27:29,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 428 transitions. [2023-11-28 20:27:29,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5138055222088835 [2023-11-28 20:27:29,834 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 428 transitions. [2023-11-28 20:27:29,834 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 428 transitions. [2023-11-28 20:27:29,834 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:27:29,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 428 transitions. [2023-11-28 20:27:29,836 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 25.176470588235293) internal successors, (428), 17 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:27:29,838 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 49.0) internal successors, (882), 18 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:27:29,838 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 49.0) internal successors, (882), 18 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:27:29,839 INFO L175 Difference]: Start difference. First operand has 75 places, 66 transitions, 281 flow. Second operand 17 states and 428 transitions. [2023-11-28 20:27:29,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 281 transitions, 1794 flow [2023-11-28 20:27:29,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 281 transitions, 1764 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-28 20:27:29,900 INFO L231 Difference]: Finished difference. Result has 91 places, 74 transitions, 368 flow [2023-11-28 20:27:29,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=368, PETRI_PLACES=91, PETRI_TRANSITIONS=74} [2023-11-28 20:27:29,900 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 41 predicate places. [2023-11-28 20:27:29,900 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 74 transitions, 368 flow [2023-11-28 20:27:29,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 17.041666666666668) internal successors, (409), 24 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:27:29,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:27:29,901 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:27:29,906 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d50ef4b-0f9a-42ab-8e3c-69014f36606c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-28 20:27:30,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d50ef4b-0f9a-42ab-8e3c-69014f36606c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:27:30,102 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 14 more)] === [2023-11-28 20:27:30,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:27:30,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1482468706, now seen corresponding path program 2 times [2023-11-28 20:27:30,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:27:30,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818756839] [2023-11-28 20:27:30,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:27:30,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:27:30,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:27:30,416 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:27:30,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:27:30,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818756839] [2023-11-28 20:27:30,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818756839] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:27:30,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204665008] [2023-11-28 20:27:30,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 20:27:30,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:27:30,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d50ef4b-0f9a-42ab-8e3c-69014f36606c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:27:30,418 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d50ef4b-0f9a-42ab-8e3c-69014f36606c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:27:30,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d50ef4b-0f9a-42ab-8e3c-69014f36606c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-28 20:27:30,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-28 20:27:30,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:27:30,522 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-28 20:27:30,524 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:27:30,589 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-28 20:27:30,589 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:27:30,647 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-28 20:27:30,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204665008] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:27:30,647 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:27:30,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 3, 3] total 17 [2023-11-28 20:27:30,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384729342] [2023-11-28 20:27:30,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:27:30,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-28 20:27:30,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:27:30,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-28 20:27:30,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2023-11-28 20:27:30,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 49 [2023-11-28 20:27:30,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 74 transitions, 368 flow. Second operand has 18 states, 18 states have (on average 17.22222222222222) internal successors, (310), 18 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:27:30,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:27:30,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 49 [2023-11-28 20:27:30,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:27:33,645 INFO L124 PetriNetUnfolderBase]: 16675/24966 cut-off events. [2023-11-28 20:27:33,645 INFO L125 PetriNetUnfolderBase]: For 34245/36318 co-relation queries the response was YES. [2023-11-28 20:27:33,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76064 conditions, 24966 events. 16675/24966 cut-off events. For 34245/36318 co-relation queries the response was YES. Maximal size of possible extension queue 610. Compared 165812 event pairs, 3417 based on Foata normal form. 629/25484 useless extension candidates. Maximal degree in co-relation 62561. Up to 4613 conditions per place. [2023-11-28 20:27:33,769 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 188 selfloop transitions, 32 changer transitions 31/265 dead transitions. [2023-11-28 20:27:33,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 265 transitions, 1751 flow [2023-11-28 20:27:33,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-28 20:27:33,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-28 20:27:33,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 429 transitions. [2023-11-28 20:27:33,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48639455782312924 [2023-11-28 20:27:33,772 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 429 transitions. [2023-11-28 20:27:33,772 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 429 transitions. [2023-11-28 20:27:33,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:27:33,773 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 429 transitions. [2023-11-28 20:27:33,774 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 23.833333333333332) internal successors, (429), 18 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:27:33,776 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 49.0) internal successors, (931), 19 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:27:33,776 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 49.0) internal successors, (931), 19 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:27:33,776 INFO L175 Difference]: Start difference. First operand has 91 places, 74 transitions, 368 flow. Second operand 18 states and 429 transitions. [2023-11-28 20:27:33,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 265 transitions, 1751 flow [2023-11-28 20:27:33,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 265 transitions, 1705 flow, removed 7 selfloop flow, removed 8 redundant places. [2023-11-28 20:27:33,884 INFO L231 Difference]: Finished difference. Result has 102 places, 82 transitions, 461 flow [2023-11-28 20:27:33,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=461, PETRI_PLACES=102, PETRI_TRANSITIONS=82} [2023-11-28 20:27:33,885 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 52 predicate places. [2023-11-28 20:27:33,885 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 82 transitions, 461 flow [2023-11-28 20:27:33,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 17.22222222222222) internal successors, (310), 18 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:27:33,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:27:33,886 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2023-11-28 20:27:33,891 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d50ef4b-0f9a-42ab-8e3c-69014f36606c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-28 20:27:34,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d50ef4b-0f9a-42ab-8e3c-69014f36606c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:27:34,086 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 14 more)] === [2023-11-28 20:27:34,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:27:34,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1225900054, now seen corresponding path program 2 times [2023-11-28 20:27:34,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:27:34,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100802726] [2023-11-28 20:27:34,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:27:34,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:27:34,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:27:34,252 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-11-28 20:27:34,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:27:34,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100802726] [2023-11-28 20:27:34,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100802726] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:27:34,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907033124] [2023-11-28 20:27:34,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 20:27:34,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:27:34,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d50ef4b-0f9a-42ab-8e3c-69014f36606c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:27:34,254 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d50ef4b-0f9a-42ab-8e3c-69014f36606c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:27:34,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d50ef4b-0f9a-42ab-8e3c-69014f36606c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-28 20:27:34,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-28 20:27:34,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:27:34,348 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-28 20:27:34,349 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:27:34,422 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-11-28 20:27:34,422 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:27:34,475 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-11-28 20:27:34,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907033124] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:27:34,476 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:27:34,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 3, 3] total 11 [2023-11-28 20:27:34,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623072202] [2023-11-28 20:27:34,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:27:34,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-28 20:27:34,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:27:34,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-28 20:27:34,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2023-11-28 20:27:34,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 49 [2023-11-28 20:27:34,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 82 transitions, 461 flow. Second operand has 13 states, 13 states have (on average 17.307692307692307) internal successors, (225), 13 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:27:34,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:27:34,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 49 [2023-11-28 20:27:34,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:27:37,334 INFO L124 PetriNetUnfolderBase]: 16885/25719 cut-off events. [2023-11-28 20:27:37,334 INFO L125 PetriNetUnfolderBase]: For 54105/55735 co-relation queries the response was YES. [2023-11-28 20:27:37,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82154 conditions, 25719 events. 16885/25719 cut-off events. For 54105/55735 co-relation queries the response was YES. Maximal size of possible extension queue 584. Compared 174585 event pairs, 3268 based on Foata normal form. 674/26194 useless extension candidates. Maximal degree in co-relation 63610. Up to 6453 conditions per place. [2023-11-28 20:27:37,422 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 0 selfloop transitions, 0 changer transitions 271/271 dead transitions. [2023-11-28 20:27:37,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 271 transitions, 1993 flow [2023-11-28 20:27:37,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-28 20:27:37,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-28 20:27:37,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 397 transitions. [2023-11-28 20:27:37,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5063775510204082 [2023-11-28 20:27:37,424 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 397 transitions. [2023-11-28 20:27:37,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 397 transitions. [2023-11-28 20:27:37,425 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:27:37,425 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 397 transitions. [2023-11-28 20:27:37,426 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 24.8125) internal successors, (397), 16 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:27:37,428 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 49.0) internal successors, (833), 17 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:27:37,428 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 49.0) internal successors, (833), 17 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:27:37,428 INFO L175 Difference]: Start difference. First operand has 102 places, 82 transitions, 461 flow. Second operand 16 states and 397 transitions. [2023-11-28 20:27:37,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 271 transitions, 1993 flow [2023-11-28 20:27:37,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 271 transitions, 1930 flow, removed 15 selfloop flow, removed 12 redundant places. [2023-11-28 20:27:37,600 INFO L231 Difference]: Finished difference. Result has 104 places, 0 transitions, 0 flow [2023-11-28 20:27:37,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=0, PETRI_PLACES=104, PETRI_TRANSITIONS=0} [2023-11-28 20:27:37,601 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 54 predicate places. [2023-11-28 20:27:37,601 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 0 transitions, 0 flow [2023-11-28 20:27:37,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 17.307692307692307) internal successors, (225), 13 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:27:37,603 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (16 of 17 remaining) [2023-11-28 20:27:37,604 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (15 of 17 remaining) [2023-11-28 20:27:37,604 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (14 of 17 remaining) [2023-11-28 20:27:37,604 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (13 of 17 remaining) [2023-11-28 20:27:37,604 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (12 of 17 remaining) [2023-11-28 20:27:37,604 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread3Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (11 of 17 remaining) [2023-11-28 20:27:37,604 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (10 of 17 remaining) [2023-11-28 20:27:37,604 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 17 remaining) [2023-11-28 20:27:37,604 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 17 remaining) [2023-11-28 20:27:37,604 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 17 remaining) [2023-11-28 20:27:37,604 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 17 remaining) [2023-11-28 20:27:37,605 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 17 remaining) [2023-11-28 20:27:37,605 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 17 remaining) [2023-11-28 20:27:37,605 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 17 remaining) [2023-11-28 20:27:37,605 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 17 remaining) [2023-11-28 20:27:37,605 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 17 remaining) [2023-11-28 20:27:37,605 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread3Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 17 remaining) [2023-11-28 20:27:37,609 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d50ef4b-0f9a-42ab-8e3c-69014f36606c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-28 20:27:37,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d50ef4b-0f9a-42ab-8e3c-69014f36606c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:27:37,806 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:27:37,811 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-28 20:27:37,811 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-28 20:27:37,815 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 08:27:37 BasicIcfg [2023-11-28 20:27:37,815 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-28 20:27:37,816 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-28 20:27:37,816 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-28 20:27:37,816 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-28 20:27:37,816 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:27:14" (3/4) ... [2023-11-28 20:27:37,817 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-28 20:27:37,819 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2023-11-28 20:27:37,820 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2023-11-28 20:27:37,820 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread3 [2023-11-28 20:27:37,826 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 97 nodes and edges [2023-11-28 20:27:37,827 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 26 nodes and edges [2023-11-28 20:27:37,827 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2023-11-28 20:27:37,827 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-11-28 20:27:37,916 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d50ef4b-0f9a-42ab-8e3c-69014f36606c/bin/uautomizer-verify-BQ2R08f2Ya/witness.graphml [2023-11-28 20:27:37,917 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d50ef4b-0f9a-42ab-8e3c-69014f36606c/bin/uautomizer-verify-BQ2R08f2Ya/witness.yml [2023-11-28 20:27:37,917 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-28 20:27:37,918 INFO L158 Benchmark]: Toolchain (without parser) took 24547.99ms. Allocated memory was 148.9MB in the beginning and 1.8GB in the end (delta: 1.7GB). Free memory was 102.6MB in the beginning and 1.1GB in the end (delta: -1.0GB). Peak memory consumption was 632.3MB. Max. memory is 16.1GB. [2023-11-28 20:27:37,918 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 94.4MB. Free memory is still 42.2MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-28 20:27:37,918 INFO L158 Benchmark]: CACSL2BoogieTranslator took 296.17ms. Allocated memory is still 148.9MB. Free memory was 102.6MB in the beginning and 90.4MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-28 20:27:37,919 INFO L158 Benchmark]: Boogie Procedure Inliner took 43.22ms. Allocated memory is still 148.9MB. Free memory was 90.4MB in the beginning and 88.7MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-28 20:27:37,919 INFO L158 Benchmark]: Boogie Preprocessor took 55.27ms. Allocated memory is still 148.9MB. Free memory was 88.7MB in the beginning and 85.8MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-28 20:27:37,919 INFO L158 Benchmark]: RCFGBuilder took 702.49ms. Allocated memory was 148.9MB in the beginning and 230.7MB in the end (delta: 81.8MB). Free memory was 85.8MB in the beginning and 167.2MB in the end (delta: -81.4MB). Peak memory consumption was 17.6MB. Max. memory is 16.1GB. [2023-11-28 20:27:37,920 INFO L158 Benchmark]: TraceAbstraction took 23342.17ms. Allocated memory was 230.7MB in the beginning and 1.8GB in the end (delta: 1.6GB). Free memory was 167.2MB in the beginning and 1.2GB in the end (delta: -985.5MB). Peak memory consumption was 1.0GB. Max. memory is 16.1GB. [2023-11-28 20:27:37,920 INFO L158 Benchmark]: Witness Printer took 101.26ms. Allocated memory is still 1.8GB. Free memory was 1.2GB in the beginning and 1.1GB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-28 20:27:37,922 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 94.4MB. Free memory is still 42.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 296.17ms. Allocated memory is still 148.9MB. Free memory was 102.6MB in the beginning and 90.4MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 43.22ms. Allocated memory is still 148.9MB. Free memory was 90.4MB in the beginning and 88.7MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 55.27ms. Allocated memory is still 148.9MB. Free memory was 88.7MB in the beginning and 85.8MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 702.49ms. Allocated memory was 148.9MB in the beginning and 230.7MB in the end (delta: 81.8MB). Free memory was 85.8MB in the beginning and 167.2MB in the end (delta: -81.4MB). Peak memory consumption was 17.6MB. Max. memory is 16.1GB. * TraceAbstraction took 23342.17ms. Allocated memory was 230.7MB in the beginning and 1.8GB in the end (delta: 1.6GB). Free memory was 167.2MB in the beginning and 1.2GB in the end (delta: -985.5MB). Peak memory consumption was 1.0GB. Max. memory is 16.1GB. * Witness Printer took 101.26ms. Allocated memory is still 1.8GB. Free memory was 1.2GB in the beginning and 1.1GB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 46]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 46]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 58]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 58]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 70]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 70]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 110]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 110]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 76 locations, 17 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 23.2s, OverallIterations: 16, TraceHistogramMax: 5, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 15.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1863 SdHoareTripleChecker+Valid, 3.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1758 mSDsluCounter, 1408 SdHoareTripleChecker+Invalid, 3.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1375 mSDsCounter, 52 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6746 IncrementalHoareTripleChecker+Invalid, 6798 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 52 mSolverCounterUnsat, 33 mSDtfsCounter, 6746 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 512 GetRequests, 289 SyntacticMatches, 7 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 813 ImplicationChecksByTransitivity, 1.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=461occurred in iteration=15, InterpolantAutomatonStates: 143, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.3s InterpolantComputationTime, 462 NumberOfCodeBlocks, 405 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 591 ConstructedInterpolants, 0 QuantifiedInterpolants, 1927 SizeOfPredicates, 38 NumberOfNonLiveVariables, 1517 ConjunctsInSsa, 70 ConjunctsInUnsatCore, 35 InterpolantComputations, 8 PerfectInterpolantSequences, 272/460 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 8 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-11-28 20:27:37,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d50ef4b-0f9a-42ab-8e3c-69014f36606c/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE