./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-figure1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fd385c-e484-4bc1-afd5-8470548f32b5/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fd385c-e484-4bc1-afd5-8470548f32b5/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fd385c-e484-4bc1-afd5-8470548f32b5/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fd385c-e484-4bc1-afd5-8470548f32b5/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-figure1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fd385c-e484-4bc1-afd5-8470548f32b5/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fd385c-e484-4bc1-afd5-8470548f32b5/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --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 33cf58268090640beca4b79cf718f2ee2d6c29dee3e4b3e200f8bf0a7c295123 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 21:58:21,402 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 21:58:21,538 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fd385c-e484-4bc1-afd5-8470548f32b5/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-11-06 21:58:21,545 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 21:58:21,546 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 21:58:21,576 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 21:58:21,577 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 21:58:21,578 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 21:58:21,579 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 21:58:21,579 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 21:58:21,581 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 21:58:21,581 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 21:58:21,582 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 21:58:21,583 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 21:58:21,584 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 21:58:21,584 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 21:58:21,585 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 21:58:21,586 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 21:58:21,587 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 21:58:21,587 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 21:58:21,588 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 21:58:21,589 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 21:58:21,590 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-06 21:58:21,590 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 21:58:21,591 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 21:58:21,592 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 21:58:21,593 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 21:58:21,594 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 21:58:21,594 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 21:58:21,595 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 21:58:21,596 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:58:21,597 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 21:58:21,597 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 21:58:21,598 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 21:58:21,599 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 21:58:21,600 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 21:58:21,600 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 21:58:21,601 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 21:58:21,602 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 21:58:21,602 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 21:58:21,603 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 21:58:21,604 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_c7fd385c-e484-4bc1-afd5-8470548f32b5/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fd385c-e484-4bc1-afd5-8470548f32b5/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 33cf58268090640beca4b79cf718f2ee2d6c29dee3e4b3e200f8bf0a7c295123 [2023-11-06 21:58:21,979 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 21:58:22,021 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 21:58:22,024 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 21:58:22,026 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 21:58:22,027 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 21:58:22,028 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fd385c-e484-4bc1-afd5-8470548f32b5/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/popl20-figure1.wvr.c [2023-11-06 21:58:25,517 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 21:58:25,806 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 21:58:25,809 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fd385c-e484-4bc1-afd5-8470548f32b5/sv-benchmarks/c/weaver/popl20-figure1.wvr.c [2023-11-06 21:58:25,822 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fd385c-e484-4bc1-afd5-8470548f32b5/bin/uautomizer-verify-WvqO1wxjHP/data/04e5654af/109a924701894852a6aef5a6b385ac3f/FLAG4625a842a [2023-11-06 21:58:25,844 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fd385c-e484-4bc1-afd5-8470548f32b5/bin/uautomizer-verify-WvqO1wxjHP/data/04e5654af/109a924701894852a6aef5a6b385ac3f [2023-11-06 21:58:25,854 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 21:58:25,858 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 21:58:25,863 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 21:58:25,863 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 21:58:25,870 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 21:58:25,871 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:58:25" (1/1) ... [2023-11-06 21:58:25,872 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a584c02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:25, skipping insertion in model container [2023-11-06 21:58:25,872 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:58:25" (1/1) ... [2023-11-06 21:58:25,903 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 21:58:26,145 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:58:26,157 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 21:58:26,182 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:58:26,192 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 21:58:26,192 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 21:58:26,201 INFO L206 MainTranslator]: Completed translation [2023-11-06 21:58:26,202 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:26 WrapperNode [2023-11-06 21:58:26,202 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 21:58:26,203 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 21:58:26,204 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 21:58:26,204 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 21:58:26,213 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:26" (1/1) ... [2023-11-06 21:58:26,224 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:26" (1/1) ... [2023-11-06 21:58:26,248 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 75 [2023-11-06 21:58:26,249 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 21:58:26,250 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 21:58:26,250 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 21:58:26,250 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 21:58:26,261 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:26" (1/1) ... [2023-11-06 21:58:26,261 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:26" (1/1) ... [2023-11-06 21:58:26,264 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:26" (1/1) ... [2023-11-06 21:58:26,264 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:26" (1/1) ... [2023-11-06 21:58:26,271 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:26" (1/1) ... [2023-11-06 21:58:26,274 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:26" (1/1) ... [2023-11-06 21:58:26,276 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:26" (1/1) ... [2023-11-06 21:58:26,277 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:26" (1/1) ... [2023-11-06 21:58:26,280 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 21:58:26,281 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 21:58:26,282 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 21:58:26,282 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 21:58:26,283 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:26" (1/1) ... [2023-11-06 21:58:26,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:58:26,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fd385c-e484-4bc1-afd5-8470548f32b5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:58:26,321 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fd385c-e484-4bc1-afd5-8470548f32b5/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 21:58:26,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fd385c-e484-4bc1-afd5-8470548f32b5/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 21:58:26,367 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 21:58:26,368 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 21:58:26,368 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 21:58:26,368 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 21:58:26,368 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 21:58:26,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 21:58:26,369 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 21:58:26,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 21:58:26,369 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-06 21:58:26,369 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-06 21:58:26,370 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 21:58:26,370 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 21:58:26,372 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 21:58:26,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 21:58:26,374 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 21:58:26,524 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 21:58:26,526 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 21:58:26,755 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 21:58:26,827 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 21:58:26,827 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-06 21:58:26,830 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:58:26 BoogieIcfgContainer [2023-11-06 21:58:26,830 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 21:58:26,833 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 21:58:26,834 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 21:58:26,837 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 21:58:26,838 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:58:25" (1/3) ... [2023-11-06 21:58:26,838 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f87db3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:58:26, skipping insertion in model container [2023-11-06 21:58:26,839 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:26" (2/3) ... [2023-11-06 21:58:26,839 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f87db3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:58:26, skipping insertion in model container [2023-11-06 21:58:26,839 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:58:26" (3/3) ... [2023-11-06 21:58:26,841 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure1.wvr.c [2023-11-06 21:58:26,850 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 21:58:26,863 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 21:58:26,863 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2023-11-06 21:58:26,864 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 21:58:26,976 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-06 21:58:27,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 92 places, 90 transitions, 194 flow [2023-11-06 21:58:27,087 INFO L124 PetriNetUnfolderBase]: 5/88 cut-off events. [2023-11-06 21:58:27,088 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 21:58:27,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97 conditions, 88 events. 5/88 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 106 event pairs, 0 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 45. Up to 2 conditions per place. [2023-11-06 21:58:27,095 INFO L82 GeneralOperation]: Start removeDead. Operand has 92 places, 90 transitions, 194 flow [2023-11-06 21:58:27,100 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 69 places, 66 transitions, 141 flow [2023-11-06 21:58:27,104 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 21:58:27,115 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 69 places, 66 transitions, 141 flow [2023-11-06 21:58:27,118 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 69 places, 66 transitions, 141 flow [2023-11-06 21:58:27,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 69 places, 66 transitions, 141 flow [2023-11-06 21:58:27,150 INFO L124 PetriNetUnfolderBase]: 4/66 cut-off events. [2023-11-06 21:58:27,150 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 21:58:27,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74 conditions, 66 events. 4/66 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 105 event pairs, 0 based on Foata normal form. 0/54 useless extension candidates. Maximal degree in co-relation 45. Up to 2 conditions per place. [2023-11-06 21:58:27,153 INFO L119 LiptonReduction]: Number of co-enabled transitions 1088 [2023-11-06 21:58:30,097 INFO L134 LiptonReduction]: Checked pairs total: 1107 [2023-11-06 21:58:30,098 INFO L136 LiptonReduction]: Total number of compositions: 58 [2023-11-06 21:58:30,117 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 21:58:30,125 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=LoopsAndPotentialCycles, 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;@4413a44c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 21:58:30,126 INFO L358 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2023-11-06 21:58:30,130 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 21:58:30,131 INFO L124 PetriNetUnfolderBase]: 1/5 cut-off events. [2023-11-06 21:58:30,131 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 21:58:30,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:58:30,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 21:58:30,133 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-06 21:58:30,139 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:30,140 INFO L85 PathProgramCache]: Analyzing trace with hash 11267814, now seen corresponding path program 1 times [2023-11-06 21:58:30,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:30,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416835668] [2023-11-06 21:58:30,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:30,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:30,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:30,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:30,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:30,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416835668] [2023-11-06 21:58:30,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416835668] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:30,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:58:30,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 21:58:30,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753096337] [2023-11-06 21:58:30,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:30,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:58:30,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:30,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:58:30,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:58:30,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 148 [2023-11-06 21:58:30,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 21 transitions, 51 flow. Second operand has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:30,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:58:30,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 148 [2023-11-06 21:58:30,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:58:30,652 INFO L124 PetriNetUnfolderBase]: 215/331 cut-off events. [2023-11-06 21:58:30,653 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2023-11-06 21:58:30,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 689 conditions, 331 events. 215/331 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 1196 event pairs, 41 based on Foata normal form. 0/130 useless extension candidates. Maximal degree in co-relation 595. Up to 303 conditions per place. [2023-11-06 21:58:30,663 INFO L140 encePairwiseOnDemand]: 137/148 looper letters, 21 selfloop transitions, 4 changer transitions 3/30 dead transitions. [2023-11-06 21:58:30,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 30 transitions, 131 flow [2023-11-06 21:58:30,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:58:30,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 21:58:30,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 261 transitions. [2023-11-06 21:58:30,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5878378378378378 [2023-11-06 21:58:30,693 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 261 transitions. [2023-11-06 21:58:30,693 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 261 transitions. [2023-11-06 21:58:30,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:58:30,701 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 261 transitions. [2023-11-06 21:58:30,704 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:30,709 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 148.0) internal successors, (592), 4 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:30,710 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 148.0) internal successors, (592), 4 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:30,712 INFO L175 Difference]: Start difference. First operand has 26 places, 21 transitions, 51 flow. Second operand 3 states and 261 transitions. [2023-11-06 21:58:30,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 30 transitions, 131 flow [2023-11-06 21:58:30,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 30 transitions, 123 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-06 21:58:30,719 INFO L231 Difference]: Finished difference. Result has 25 places, 23 transitions, 80 flow [2023-11-06 21:58:30,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=25, PETRI_TRANSITIONS=23} [2023-11-06 21:58:30,725 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -1 predicate places. [2023-11-06 21:58:30,726 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 23 transitions, 80 flow [2023-11-06 21:58:30,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:30,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:58:30,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 21:58:30,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 21:58:30,727 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-06 21:58:30,728 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:30,728 INFO L85 PathProgramCache]: Analyzing trace with hash 11267838, now seen corresponding path program 1 times [2023-11-06 21:58:30,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:30,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340898247] [2023-11-06 21:58:30,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:30,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:30,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:30,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:30,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:30,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340898247] [2023-11-06 21:58:30,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340898247] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:30,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:58:30,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:58:30,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776662872] [2023-11-06 21:58:30,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:30,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:58:30,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:30,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:58:30,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:58:30,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 148 [2023-11-06 21:58:30,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 23 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:30,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:58:30,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 148 [2023-11-06 21:58:30,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:58:30,987 INFO L124 PetriNetUnfolderBase]: 198/319 cut-off events. [2023-11-06 21:58:30,988 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-06 21:58:30,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 844 conditions, 319 events. 198/319 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 1310 event pairs, 95 based on Foata normal form. 0/186 useless extension candidates. Maximal degree in co-relation 651. Up to 305 conditions per place. [2023-11-06 21:58:30,998 INFO L140 encePairwiseOnDemand]: 143/148 looper letters, 22 selfloop transitions, 2 changer transitions 1/26 dead transitions. [2023-11-06 21:58:30,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 26 transitions, 132 flow [2023-11-06 21:58:30,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:58:30,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 21:58:31,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 246 transitions. [2023-11-06 21:58:31,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5540540540540541 [2023-11-06 21:58:31,003 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 246 transitions. [2023-11-06 21:58:31,003 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 246 transitions. [2023-11-06 21:58:31,003 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:58:31,004 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 246 transitions. [2023-11-06 21:58:31,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:31,015 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 148.0) internal successors, (592), 4 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:31,017 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 148.0) internal successors, (592), 4 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:31,017 INFO L175 Difference]: Start difference. First operand has 25 places, 23 transitions, 80 flow. Second operand 3 states and 246 transitions. [2023-11-06 21:58:31,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 26 transitions, 132 flow [2023-11-06 21:58:31,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 26 transitions, 130 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 21:58:31,020 INFO L231 Difference]: Finished difference. Result has 27 places, 21 transitions, 76 flow [2023-11-06 21:58:31,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=27, PETRI_TRANSITIONS=21} [2023-11-06 21:58:31,023 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 1 predicate places. [2023-11-06 21:58:31,024 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 21 transitions, 76 flow [2023-11-06 21:58:31,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:31,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:58:31,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 21:58:31,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 21:58:31,033 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-06 21:58:31,037 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:31,038 INFO L85 PathProgramCache]: Analyzing trace with hash 349303494, now seen corresponding path program 1 times [2023-11-06 21:58:31,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:31,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610906810] [2023-11-06 21:58:31,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:31,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:31,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:31,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:31,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:31,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610906810] [2023-11-06 21:58:31,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610906810] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:58:31,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803684046] [2023-11-06 21:58:31,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:31,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:58:31,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fd385c-e484-4bc1-afd5-8470548f32b5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:58:31,248 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fd385c-e484-4bc1-afd5-8470548f32b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:58:31,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fd385c-e484-4bc1-afd5-8470548f32b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 21:58:31,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:31,340 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 21:58:31,346 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:58:31,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:31,390 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:58:31,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:31,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803684046] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:58:31,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:58:31,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-06 21:58:31,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753462668] [2023-11-06 21:58:31,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:58:31,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 21:58:31,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:31,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 21:58:31,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-06 21:58:31,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 148 [2023-11-06 21:58:31,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 21 transitions, 76 flow. Second operand has 7 states, 7 states have (on average 74.42857142857143) internal successors, (521), 7 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:31,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:58:31,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 148 [2023-11-06 21:58:31,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:58:31,777 INFO L124 PetriNetUnfolderBase]: 521/757 cut-off events. [2023-11-06 21:58:31,777 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2023-11-06 21:58:31,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2112 conditions, 757 events. 521/757 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 3144 event pairs, 52 based on Foata normal form. 0/393 useless extension candidates. Maximal degree in co-relation 1589. Up to 488 conditions per place. [2023-11-06 21:58:31,788 INFO L140 encePairwiseOnDemand]: 143/148 looper letters, 59 selfloop transitions, 12 changer transitions 0/72 dead transitions. [2023-11-06 21:58:31,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 72 transitions, 392 flow [2023-11-06 21:58:31,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 21:58:31,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 21:58:31,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 585 transitions. [2023-11-06 21:58:31,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5646718146718147 [2023-11-06 21:58:31,792 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 585 transitions. [2023-11-06 21:58:31,792 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 585 transitions. [2023-11-06 21:58:31,793 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:58:31,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 585 transitions. [2023-11-06 21:58:31,796 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 83.57142857142857) internal successors, (585), 7 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:31,800 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 148.0) internal successors, (1184), 8 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:31,802 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 148.0) internal successors, (1184), 8 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:31,802 INFO L175 Difference]: Start difference. First operand has 27 places, 21 transitions, 76 flow. Second operand 7 states and 585 transitions. [2023-11-06 21:58:31,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 72 transitions, 392 flow [2023-11-06 21:58:31,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 72 transitions, 386 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-06 21:58:31,809 INFO L231 Difference]: Finished difference. Result has 34 places, 30 transitions, 152 flow [2023-11-06 21:58:31,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=152, PETRI_PLACES=34, PETRI_TRANSITIONS=30} [2023-11-06 21:58:31,811 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 8 predicate places. [2023-11-06 21:58:31,812 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 30 transitions, 152 flow [2023-11-06 21:58:31,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 74.42857142857143) internal successors, (521), 7 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:31,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:58:31,813 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-06 21:58:31,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fd385c-e484-4bc1-afd5-8470548f32b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 21:58:32,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fd385c-e484-4bc1-afd5-8470548f32b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:58:32,021 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-06 21:58:32,021 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:32,021 INFO L85 PathProgramCache]: Analyzing trace with hash -2056493063, now seen corresponding path program 1 times [2023-11-06 21:58:32,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:32,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304398267] [2023-11-06 21:58:32,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:32,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:32,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:32,121 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:32,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:32,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304398267] [2023-11-06 21:58:32,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304398267] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:58:32,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551721095] [2023-11-06 21:58:32,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:32,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:58:32,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fd385c-e484-4bc1-afd5-8470548f32b5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:58:32,124 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fd385c-e484-4bc1-afd5-8470548f32b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:58:32,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fd385c-e484-4bc1-afd5-8470548f32b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 21:58:32,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:32,224 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 21:58:32,226 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:58:32,246 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:32,246 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:58:32,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551721095] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:32,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 21:58:32,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-11-06 21:58:32,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560616073] [2023-11-06 21:58:32,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:32,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 21:58:32,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:32,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 21:58:32,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-06 21:58:32,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 148 [2023-11-06 21:58:32,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 152 flow. Second operand has 5 states, 5 states have (on average 74.2) internal successors, (371), 5 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:32,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:58:32,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 148 [2023-11-06 21:58:32,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:58:32,467 INFO L124 PetriNetUnfolderBase]: 462/684 cut-off events. [2023-11-06 21:58:32,468 INFO L125 PetriNetUnfolderBase]: For 105/105 co-relation queries the response was YES. [2023-11-06 21:58:32,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2143 conditions, 684 events. 462/684 cut-off events. For 105/105 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 2898 event pairs, 24 based on Foata normal form. 28/479 useless extension candidates. Maximal degree in co-relation 1819. Up to 434 conditions per place. [2023-11-06 21:58:32,477 INFO L140 encePairwiseOnDemand]: 144/148 looper letters, 40 selfloop transitions, 7 changer transitions 0/48 dead transitions. [2023-11-06 21:58:32,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 48 transitions, 289 flow [2023-11-06 21:58:32,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 21:58:32,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 21:58:32,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 410 transitions. [2023-11-06 21:58:32,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5540540540540541 [2023-11-06 21:58:32,481 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 410 transitions. [2023-11-06 21:58:32,482 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 410 transitions. [2023-11-06 21:58:32,487 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:58:32,487 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 410 transitions. [2023-11-06 21:58:32,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 82.0) internal successors, (410), 5 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:32,492 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 148.0) internal successors, (888), 6 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:32,493 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 148.0) internal successors, (888), 6 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:32,493 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 152 flow. Second operand 5 states and 410 transitions. [2023-11-06 21:58:32,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 48 transitions, 289 flow [2023-11-06 21:58:32,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 48 transitions, 277 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-06 21:58:32,504 INFO L231 Difference]: Finished difference. Result has 34 places, 26 transitions, 127 flow [2023-11-06 21:58:32,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=127, PETRI_PLACES=34, PETRI_TRANSITIONS=26} [2023-11-06 21:58:32,510 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 8 predicate places. [2023-11-06 21:58:32,510 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 26 transitions, 127 flow [2023-11-06 21:58:32,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.2) internal successors, (371), 5 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:32,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:58:32,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 21:58:32,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fd385c-e484-4bc1-afd5-8470548f32b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 21:58:32,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fd385c-e484-4bc1-afd5-8470548f32b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:58:32,725 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-06 21:58:32,725 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:32,725 INFO L85 PathProgramCache]: Analyzing trace with hash 349303470, now seen corresponding path program 1 times [2023-11-06 21:58:32,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:32,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948232987] [2023-11-06 21:58:32,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:32,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:32,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:32,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:32,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:32,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948232987] [2023-11-06 21:58:32,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948232987] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:58:32,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644056295] [2023-11-06 21:58:32,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:32,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:58:32,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fd385c-e484-4bc1-afd5-8470548f32b5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:58:32,846 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fd385c-e484-4bc1-afd5-8470548f32b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:58:32,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fd385c-e484-4bc1-afd5-8470548f32b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 21:58:32,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:32,923 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 21:58:32,924 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:58:32,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:32,938 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:58:32,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644056295] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:32,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 21:58:32,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 3 [2023-11-06 21:58:32,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514410058] [2023-11-06 21:58:32,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:32,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:58:32,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:32,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:58:32,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:58:32,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 148 [2023-11-06 21:58:32,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 26 transitions, 127 flow. Second operand has 4 states, 4 states have (on average 76.0) internal successors, (304), 4 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:32,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:58:32,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 148 [2023-11-06 21:58:32,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:58:33,085 INFO L124 PetriNetUnfolderBase]: 498/741 cut-off events. [2023-11-06 21:58:33,085 INFO L125 PetriNetUnfolderBase]: For 420/420 co-relation queries the response was YES. [2023-11-06 21:58:33,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2415 conditions, 741 events. 498/741 cut-off events. For 420/420 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 3005 event pairs, 61 based on Foata normal form. 0/548 useless extension candidates. Maximal degree in co-relation 2214. Up to 449 conditions per place. [2023-11-06 21:58:33,128 INFO L140 encePairwiseOnDemand]: 139/148 looper letters, 31 selfloop transitions, 12 changer transitions 0/45 dead transitions. [2023-11-06 21:58:33,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 45 transitions, 312 flow [2023-11-06 21:58:33,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:58:33,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 21:58:33,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 332 transitions. [2023-11-06 21:58:33,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5608108108108109 [2023-11-06 21:58:33,131 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 332 transitions. [2023-11-06 21:58:33,131 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 332 transitions. [2023-11-06 21:58:33,132 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:58:33,132 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 332 transitions. [2023-11-06 21:58:33,133 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 83.0) internal successors, (332), 4 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:33,135 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 148.0) internal successors, (740), 5 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:33,136 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 148.0) internal successors, (740), 5 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:33,136 INFO L175 Difference]: Start difference. First operand has 34 places, 26 transitions, 127 flow. Second operand 4 states and 332 transitions. [2023-11-06 21:58:33,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 45 transitions, 312 flow [2023-11-06 21:58:33,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 45 transitions, 296 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-06 21:58:33,140 INFO L231 Difference]: Finished difference. Result has 35 places, 35 transitions, 240 flow [2023-11-06 21:58:33,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=240, PETRI_PLACES=35, PETRI_TRANSITIONS=35} [2023-11-06 21:58:33,141 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 9 predicate places. [2023-11-06 21:58:33,142 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 35 transitions, 240 flow [2023-11-06 21:58:33,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 76.0) internal successors, (304), 4 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:33,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:58:33,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 21:58:33,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fd385c-e484-4bc1-afd5-8470548f32b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 21:58:33,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fd385c-e484-4bc1-afd5-8470548f32b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:58:33,348 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-06 21:58:33,348 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:33,348 INFO L85 PathProgramCache]: Analyzing trace with hash 349303471, now seen corresponding path program 1 times [2023-11-06 21:58:33,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:33,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767970073] [2023-11-06 21:58:33,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:33,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:33,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:33,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:33,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:33,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767970073] [2023-11-06 21:58:33,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767970073] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:58:33,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352211282] [2023-11-06 21:58:33,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:33,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:58:33,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fd385c-e484-4bc1-afd5-8470548f32b5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:58:33,447 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fd385c-e484-4bc1-afd5-8470548f32b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:58:33,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fd385c-e484-4bc1-afd5-8470548f32b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 21:58:33,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:33,514 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 21:58:33,515 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:58:33,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:33,528 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:58:33,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:33,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352211282] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:58:33,559 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:58:33,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-11-06 21:58:33,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963444492] [2023-11-06 21:58:33,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:58:33,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 21:58:33,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:33,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 21:58:33,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-06 21:58:33,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 148 [2023-11-06 21:58:33,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 35 transitions, 240 flow. Second operand has 7 states, 7 states have (on average 76.57142857142857) internal successors, (536), 7 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:33,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:58:33,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 148 [2023-11-06 21:58:33,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:58:33,868 INFO L124 PetriNetUnfolderBase]: 659/1042 cut-off events. [2023-11-06 21:58:33,868 INFO L125 PetriNetUnfolderBase]: For 1302/1302 co-relation queries the response was YES. [2023-11-06 21:58:33,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4207 conditions, 1042 events. 659/1042 cut-off events. For 1302/1302 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 4592 event pairs, 65 based on Foata normal form. 218/1076 useless extension candidates. Maximal degree in co-relation 4015. Up to 547 conditions per place. [2023-11-06 21:58:33,881 INFO L140 encePairwiseOnDemand]: 140/148 looper letters, 65 selfloop transitions, 29 changer transitions 0/96 dead transitions. [2023-11-06 21:58:33,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 96 transitions, 792 flow [2023-11-06 21:58:33,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 21:58:33,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 21:58:33,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 522 transitions. [2023-11-06 21:58:33,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5878378378378378 [2023-11-06 21:58:33,884 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 522 transitions. [2023-11-06 21:58:33,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 522 transitions. [2023-11-06 21:58:33,885 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:58:33,885 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 522 transitions. [2023-11-06 21:58:33,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 87.0) internal successors, (522), 6 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:33,890 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 148.0) internal successors, (1036), 7 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:33,890 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 148.0) internal successors, (1036), 7 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:33,891 INFO L175 Difference]: Start difference. First operand has 35 places, 35 transitions, 240 flow. Second operand 6 states and 522 transitions. [2023-11-06 21:58:33,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 96 transitions, 792 flow [2023-11-06 21:58:33,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 96 transitions, 713 flow, removed 39 selfloop flow, removed 1 redundant places. [2023-11-06 21:58:33,902 INFO L231 Difference]: Finished difference. Result has 43 places, 56 transitions, 532 flow [2023-11-06 21:58:33,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=532, PETRI_PLACES=43, PETRI_TRANSITIONS=56} [2023-11-06 21:58:33,905 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 17 predicate places. [2023-11-06 21:58:33,905 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 56 transitions, 532 flow [2023-11-06 21:58:33,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 76.57142857142857) internal successors, (536), 7 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:33,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:58:33,908 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:33,919 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fd385c-e484-4bc1-afd5-8470548f32b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-06 21:58:34,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fd385c-e484-4bc1-afd5-8470548f32b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:58:34,114 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-06 21:58:34,115 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:34,115 INFO L85 PathProgramCache]: Analyzing trace with hash -609416506, now seen corresponding path program 1 times [2023-11-06 21:58:34,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:34,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807902499] [2023-11-06 21:58:34,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:34,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:34,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:34,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:34,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:34,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807902499] [2023-11-06 21:58:34,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807902499] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:34,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:58:34,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:58:34,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475073629] [2023-11-06 21:58:34,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:34,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:58:34,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:34,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:58:34,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:58:34,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 148 [2023-11-06 21:58:34,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 56 transitions, 532 flow. Second operand has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:34,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:58:34,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 148 [2023-11-06 21:58:34,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:58:34,429 INFO L124 PetriNetUnfolderBase]: 630/1040 cut-off events. [2023-11-06 21:58:34,429 INFO L125 PetriNetUnfolderBase]: For 2509/2509 co-relation queries the response was YES. [2023-11-06 21:58:34,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4561 conditions, 1040 events. 630/1040 cut-off events. For 2509/2509 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 4747 event pairs, 261 based on Foata normal form. 0/912 useless extension candidates. Maximal degree in co-relation 4298. Up to 945 conditions per place. [2023-11-06 21:58:34,443 INFO L140 encePairwiseOnDemand]: 143/148 looper letters, 67 selfloop transitions, 5 changer transitions 2/75 dead transitions. [2023-11-06 21:58:34,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 75 transitions, 822 flow [2023-11-06 21:58:34,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:58:34,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 21:58:34,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 248 transitions. [2023-11-06 21:58:34,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5585585585585585 [2023-11-06 21:58:34,446 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 248 transitions. [2023-11-06 21:58:34,446 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 248 transitions. [2023-11-06 21:58:34,447 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:58:34,447 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 248 transitions. [2023-11-06 21:58:34,449 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:34,451 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 148.0) internal successors, (592), 4 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:34,452 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 148.0) internal successors, (592), 4 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:34,452 INFO L175 Difference]: Start difference. First operand has 43 places, 56 transitions, 532 flow. Second operand 3 states and 248 transitions. [2023-11-06 21:58:34,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 75 transitions, 822 flow [2023-11-06 21:58:34,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 75 transitions, 774 flow, removed 24 selfloop flow, removed 0 redundant places. [2023-11-06 21:58:34,479 INFO L231 Difference]: Finished difference. Result has 46 places, 59 transitions, 556 flow [2023-11-06 21:58:34,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=494, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=556, PETRI_PLACES=46, PETRI_TRANSITIONS=59} [2023-11-06 21:58:34,480 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 20 predicate places. [2023-11-06 21:58:34,485 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 59 transitions, 556 flow [2023-11-06 21:58:34,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:34,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:58:34,486 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-11-06 21:58:34,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 21:58:34,486 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-06 21:58:34,487 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:34,487 INFO L85 PathProgramCache]: Analyzing trace with hash -604856066, now seen corresponding path program 2 times [2023-11-06 21:58:34,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:34,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216286591] [2023-11-06 21:58:34,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:34,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:34,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:34,602 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:34,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:34,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216286591] [2023-11-06 21:58:34,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216286591] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:58:34,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995760103] [2023-11-06 21:58:34,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 21:58:34,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:58:34,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fd385c-e484-4bc1-afd5-8470548f32b5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:58:34,609 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fd385c-e484-4bc1-afd5-8470548f32b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:58:34,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fd385c-e484-4bc1-afd5-8470548f32b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 21:58:34,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 21:58:34,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:58:34,675 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 21:58:34,676 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:58:34,705 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-06 21:58:34,706 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:58:34,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995760103] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:34,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 21:58:34,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [6] total 7 [2023-11-06 21:58:34,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921556325] [2023-11-06 21:58:34,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:34,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:58:34,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:34,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:58:34,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-11-06 21:58:34,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 148 [2023-11-06 21:58:34,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 59 transitions, 556 flow. Second operand has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:34,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:58:34,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 148 [2023-11-06 21:58:34,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:58:34,876 INFO L124 PetriNetUnfolderBase]: 393/647 cut-off events. [2023-11-06 21:58:34,876 INFO L125 PetriNetUnfolderBase]: For 2160/2205 co-relation queries the response was YES. [2023-11-06 21:58:34,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2897 conditions, 647 events. 393/647 cut-off events. For 2160/2205 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 2714 event pairs, 191 based on Foata normal form. 92/686 useless extension candidates. Maximal degree in co-relation 2684. Up to 644 conditions per place. [2023-11-06 21:58:34,885 INFO L140 encePairwiseOnDemand]: 145/148 looper letters, 45 selfloop transitions, 1 changer transitions 0/48 dead transitions. [2023-11-06 21:58:34,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 48 transitions, 523 flow [2023-11-06 21:58:34,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:58:34,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 21:58:34,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 238 transitions. [2023-11-06 21:58:34,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.536036036036036 [2023-11-06 21:58:34,888 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 238 transitions. [2023-11-06 21:58:34,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 238 transitions. [2023-11-06 21:58:34,889 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:58:34,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 238 transitions. [2023-11-06 21:58:34,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 79.33333333333333) internal successors, (238), 3 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:34,892 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 148.0) internal successors, (592), 4 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:34,892 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 148.0) internal successors, (592), 4 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:34,893 INFO L175 Difference]: Start difference. First operand has 46 places, 59 transitions, 556 flow. Second operand 3 states and 238 transitions. [2023-11-06 21:58:34,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 48 transitions, 523 flow [2023-11-06 21:58:34,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 48 transitions, 498 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-06 21:58:34,909 INFO L231 Difference]: Finished difference. Result has 42 places, 48 transitions, 408 flow [2023-11-06 21:58:34,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=408, PETRI_PLACES=42, PETRI_TRANSITIONS=48} [2023-11-06 21:58:34,914 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 16 predicate places. [2023-11-06 21:58:34,915 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 48 transitions, 408 flow [2023-11-06 21:58:34,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:34,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:58:34,916 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-11-06 21:58:34,922 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fd385c-e484-4bc1-afd5-8470548f32b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-06 21:58:35,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fd385c-e484-4bc1-afd5-8470548f32b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-06 21:58:35,122 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-06 21:58:35,122 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:35,122 INFO L85 PathProgramCache]: Analyzing trace with hash -604856089, now seen corresponding path program 2 times [2023-11-06 21:58:35,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:35,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72916380] [2023-11-06 21:58:35,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:35,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:35,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:35,205 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:35,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:35,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72916380] [2023-11-06 21:58:35,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72916380] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:58:35,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603221404] [2023-11-06 21:58:35,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 21:58:35,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:58:35,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fd385c-e484-4bc1-afd5-8470548f32b5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:58:35,208 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fd385c-e484-4bc1-afd5-8470548f32b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:58:35,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fd385c-e484-4bc1-afd5-8470548f32b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 21:58:35,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 21:58:35,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:58:35,291 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 21:58:35,292 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:58:35,316 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:35,317 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:58:35,394 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:35,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603221404] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:58:35,395 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:58:35,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-06 21:58:35,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245567871] [2023-11-06 21:58:35,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:58:35,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 21:58:35,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:35,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 21:58:35,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-06 21:58:35,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 148 [2023-11-06 21:58:35,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 48 transitions, 408 flow. Second operand has 13 states, 13 states have (on average 76.3076923076923) internal successors, (992), 13 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:35,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:58:35,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 148 [2023-11-06 21:58:35,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:58:35,989 INFO L124 PetriNetUnfolderBase]: 1027/1738 cut-off events. [2023-11-06 21:58:35,989 INFO L125 PetriNetUnfolderBase]: For 6071/6188 co-relation queries the response was YES. [2023-11-06 21:58:35,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7101 conditions, 1738 events. 1027/1738 cut-off events. For 6071/6188 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 9103 event pairs, 87 based on Foata normal form. 397/1965 useless extension candidates. Maximal degree in co-relation 7083. Up to 523 conditions per place. [2023-11-06 21:58:36,007 INFO L140 encePairwiseOnDemand]: 142/148 looper letters, 112 selfloop transitions, 88 changer transitions 0/202 dead transitions. [2023-11-06 21:58:36,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 202 transitions, 1809 flow [2023-11-06 21:58:36,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 21:58:36,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-06 21:58:36,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1034 transitions. [2023-11-06 21:58:36,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5822072072072072 [2023-11-06 21:58:36,013 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1034 transitions. [2023-11-06 21:58:36,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1034 transitions. [2023-11-06 21:58:36,015 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:58:36,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1034 transitions. [2023-11-06 21:58:36,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 86.16666666666667) internal successors, (1034), 12 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:36,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 148.0) internal successors, (1924), 13 states have internal predecessors, (1924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:36,026 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 148.0) internal successors, (1924), 13 states have internal predecessors, (1924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:36,026 INFO L175 Difference]: Start difference. First operand has 42 places, 48 transitions, 408 flow. Second operand 12 states and 1034 transitions. [2023-11-06 21:58:36,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 202 transitions, 1809 flow [2023-11-06 21:58:36,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 202 transitions, 1808 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 21:58:36,054 INFO L231 Difference]: Finished difference. Result has 62 places, 117 transitions, 1565 flow [2023-11-06 21:58:36,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=407, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1565, PETRI_PLACES=62, PETRI_TRANSITIONS=117} [2023-11-06 21:58:36,056 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 36 predicate places. [2023-11-06 21:58:36,057 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 117 transitions, 1565 flow [2023-11-06 21:58:36,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 76.3076923076923) internal successors, (992), 13 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:36,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:58:36,058 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:36,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fd385c-e484-4bc1-afd5-8470548f32b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 21:58:36,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fd385c-e484-4bc1-afd5-8470548f32b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:58:36,265 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-06 21:58:36,265 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:36,265 INFO L85 PathProgramCache]: Analyzing trace with hash -156807532, now seen corresponding path program 1 times [2023-11-06 21:58:36,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:36,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868567092] [2023-11-06 21:58:36,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:36,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:36,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:36,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:58:36,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:36,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868567092] [2023-11-06 21:58:36,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868567092] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:36,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:58:36,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:58:36,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309386091] [2023-11-06 21:58:36,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:36,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:58:36,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:36,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:58:36,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:58:36,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 148 [2023-11-06 21:58:36,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 117 transitions, 1565 flow. Second operand has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:36,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:58:36,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 148 [2023-11-06 21:58:36,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:58:36,705 INFO L124 PetriNetUnfolderBase]: 859/1443 cut-off events. [2023-11-06 21:58:36,705 INFO L125 PetriNetUnfolderBase]: For 8310/8310 co-relation queries the response was YES. [2023-11-06 21:58:36,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6832 conditions, 1443 events. 859/1443 cut-off events. For 8310/8310 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 7105 event pairs, 245 based on Foata normal form. 0/1443 useless extension candidates. Maximal degree in co-relation 6803. Up to 735 conditions per place. [2023-11-06 21:58:36,720 INFO L140 encePairwiseOnDemand]: 145/148 looper letters, 140 selfloop transitions, 3 changer transitions 4/148 dead transitions. [2023-11-06 21:58:36,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 148 transitions, 2239 flow [2023-11-06 21:58:36,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:58:36,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 21:58:36,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 240 transitions. [2023-11-06 21:58:36,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5405405405405406 [2023-11-06 21:58:36,723 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 240 transitions. [2023-11-06 21:58:36,723 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 240 transitions. [2023-11-06 21:58:36,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:58:36,724 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 240 transitions. [2023-11-06 21:58:36,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:36,727 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 148.0) internal successors, (592), 4 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:36,728 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 148.0) internal successors, (592), 4 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:36,728 INFO L175 Difference]: Start difference. First operand has 62 places, 117 transitions, 1565 flow. Second operand 3 states and 240 transitions. [2023-11-06 21:58:36,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 148 transitions, 2239 flow [2023-11-06 21:58:36,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 148 transitions, 2053 flow, removed 93 selfloop flow, removed 0 redundant places. [2023-11-06 21:58:36,775 INFO L231 Difference]: Finished difference. Result has 63 places, 93 transitions, 1115 flow [2023-11-06 21:58:36,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=1119, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1115, PETRI_PLACES=63, PETRI_TRANSITIONS=93} [2023-11-06 21:58:36,777 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 37 predicate places. [2023-11-06 21:58:36,777 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 93 transitions, 1115 flow [2023-11-06 21:58:36,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:36,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:58:36,778 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1] [2023-11-06 21:58:36,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-06 21:58:36,778 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-06 21:58:36,779 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:36,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1916285977, now seen corresponding path program 3 times [2023-11-06 21:58:36,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:36,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215321730] [2023-11-06 21:58:36,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:36,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:36,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:37,000 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:37,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:37,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215321730] [2023-11-06 21:58:37,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215321730] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:58:37,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109242966] [2023-11-06 21:58:37,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 21:58:37,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:58:37,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fd385c-e484-4bc1-afd5-8470548f32b5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:58:37,005 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fd385c-e484-4bc1-afd5-8470548f32b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:58:37,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fd385c-e484-4bc1-afd5-8470548f32b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 21:58:37,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-06 21:58:37,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:58:37,128 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 21:58:37,131 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:58:37,188 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:37,189 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:58:37,512 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:37,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109242966] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:58:37,513 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:58:37,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2023-11-06 21:58:37,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107130937] [2023-11-06 21:58:37,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:58:37,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 21:58:37,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:37,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 21:58:37,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-11-06 21:58:37,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 148 [2023-11-06 21:58:37,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 93 transitions, 1115 flow. Second operand has 25 states, 25 states have (on average 76.16) internal successors, (1904), 25 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:37,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:58:37,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 148 [2023-11-06 21:58:37,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:58:38,929 INFO L124 PetriNetUnfolderBase]: 2204/3809 cut-off events. [2023-11-06 21:58:38,929 INFO L125 PetriNetUnfolderBase]: For 56322/56566 co-relation queries the response was YES. [2023-11-06 21:58:38,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16638 conditions, 3809 events. 2204/3809 cut-off events. For 56322/56566 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 21712 event pairs, 175 based on Foata normal form. 786/4594 useless extension candidates. Maximal degree in co-relation 16608. Up to 1279 conditions per place. [2023-11-06 21:58:38,975 INFO L140 encePairwiseOnDemand]: 143/148 looper letters, 131 selfloop transitions, 242 changer transitions 66/441 dead transitions. [2023-11-06 21:58:38,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 441 transitions, 4522 flow [2023-11-06 21:58:38,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-06 21:58:38,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-06 21:58:38,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2055 transitions. [2023-11-06 21:58:38,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5785472972972973 [2023-11-06 21:58:38,987 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2055 transitions. [2023-11-06 21:58:38,987 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2055 transitions. [2023-11-06 21:58:38,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:58:38,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2055 transitions. [2023-11-06 21:58:38,999 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 85.625) internal successors, (2055), 24 states have internal predecessors, (2055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:39,010 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 148.0) internal successors, (3700), 25 states have internal predecessors, (3700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:39,012 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 148.0) internal successors, (3700), 25 states have internal predecessors, (3700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:39,013 INFO L175 Difference]: Start difference. First operand has 63 places, 93 transitions, 1115 flow. Second operand 24 states and 2055 transitions. [2023-11-06 21:58:39,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 441 transitions, 4522 flow [2023-11-06 21:58:39,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 441 transitions, 4418 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-11-06 21:58:39,169 INFO L231 Difference]: Finished difference. Result has 106 places, 265 transitions, 4114 flow [2023-11-06 21:58:39,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=1099, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=4114, PETRI_PLACES=106, PETRI_TRANSITIONS=265} [2023-11-06 21:58:39,170 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 80 predicate places. [2023-11-06 21:58:39,170 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 265 transitions, 4114 flow [2023-11-06 21:58:39,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 76.16) internal successors, (1904), 25 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:39,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:58:39,171 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1] [2023-11-06 21:58:39,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fd385c-e484-4bc1-afd5-8470548f32b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 21:58:39,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fd385c-e484-4bc1-afd5-8470548f32b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:58:39,379 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-06 21:58:39,379 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:39,379 INFO L85 PathProgramCache]: Analyzing trace with hash 339567079, now seen corresponding path program 4 times [2023-11-06 21:58:39,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:39,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666676546] [2023-11-06 21:58:39,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:39,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:39,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:40,116 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:40,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:40,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666676546] [2023-11-06 21:58:40,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666676546] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:58:40,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769666022] [2023-11-06 21:58:40,117 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 21:58:40,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:58:40,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fd385c-e484-4bc1-afd5-8470548f32b5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:58:40,119 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fd385c-e484-4bc1-afd5-8470548f32b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:58:40,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fd385c-e484-4bc1-afd5-8470548f32b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 21:58:40,237 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 21:58:40,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:58:40,239 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-06 21:58:40,242 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:58:40,307 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:40,307 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:58:41,474 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:41,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769666022] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:58:41,475 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:58:41,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 47 [2023-11-06 21:58:41,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013049352] [2023-11-06 21:58:41,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:58:41,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-11-06 21:58:41,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:41,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-11-06 21:58:41,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-11-06 21:58:41,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 148 [2023-11-06 21:58:41,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 265 transitions, 4114 flow. Second operand has 49 states, 49 states have (on average 76.08163265306122) internal successors, (3728), 49 states have internal predecessors, (3728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:41,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:58:41,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 148 [2023-11-06 21:58:41,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:58:47,118 INFO L124 PetriNetUnfolderBase]: 7568/13121 cut-off events. [2023-11-06 21:58:47,118 INFO L125 PetriNetUnfolderBase]: For 701074/701607 co-relation queries the response was YES. [2023-11-06 21:58:47,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62140 conditions, 13121 events. 7568/13121 cut-off events. For 701074/701607 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 84035 event pairs, 743 based on Foata normal form. 1675/14796 useless extension candidates. Maximal degree in co-relation 62087. Up to 4351 conditions per place. [2023-11-06 21:58:47,282 INFO L140 encePairwiseOnDemand]: 143/148 looper letters, 251 selfloop transitions, 882 changer transitions 138/1273 dead transitions. [2023-11-06 21:58:47,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 1273 transitions, 17093 flow [2023-11-06 21:58:47,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-06 21:58:47,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-11-06 21:58:47,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 4119 transitions. [2023-11-06 21:58:47,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5798141891891891 [2023-11-06 21:58:47,298 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 4119 transitions. [2023-11-06 21:58:47,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 4119 transitions. [2023-11-06 21:58:47,303 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:58:47,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 4119 transitions. [2023-11-06 21:58:47,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 85.8125) internal successors, (4119), 48 states have internal predecessors, (4119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:47,335 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 148.0) internal successors, (7252), 49 states have internal predecessors, (7252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:47,339 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 148.0) internal successors, (7252), 49 states have internal predecessors, (7252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:47,339 INFO L175 Difference]: Start difference. First operand has 106 places, 265 transitions, 4114 flow. Second operand 48 states and 4119 transitions. [2023-11-06 21:58:47,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 1273 transitions, 17093 flow [2023-11-06 21:58:47,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 1273 transitions, 14201 flow, removed 1397 selfloop flow, removed 5 redundant places. [2023-11-06 21:58:47,930 INFO L231 Difference]: Finished difference. Result has 194 places, 905 transitions, 14361 flow [2023-11-06 21:58:47,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=3620, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=250, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=14361, PETRI_PLACES=194, PETRI_TRANSITIONS=905} [2023-11-06 21:58:47,932 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 168 predicate places. [2023-11-06 21:58:47,932 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 905 transitions, 14361 flow [2023-11-06 21:58:47,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 76.08163265306122) internal successors, (3728), 49 states have internal predecessors, (3728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:47,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:58:47,935 INFO L208 CegarLoopForPetriNet]: trace histogram [46, 1, 1, 1, 1] [2023-11-06 21:58:47,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fd385c-e484-4bc1-afd5-8470548f32b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 21:58:48,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fd385c-e484-4bc1-afd5-8470548f32b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:58:48,145 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-06 21:58:48,145 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:48,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1570082279, now seen corresponding path program 5 times [2023-11-06 21:58:48,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:48,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545773936] [2023-11-06 21:58:48,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:48,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:48,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:50,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:50,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:50,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545773936] [2023-11-06 21:58:50,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545773936] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:58:50,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300517940] [2023-11-06 21:58:50,682 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 21:58:50,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:58:50,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fd385c-e484-4bc1-afd5-8470548f32b5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:58:50,687 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fd385c-e484-4bc1-afd5-8470548f32b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:58:50,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fd385c-e484-4bc1-afd5-8470548f32b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 21:58:50,877 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2023-11-06 21:58:50,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:58:50,881 INFO L262 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-06 21:58:50,886 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:58:51,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:51,074 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:58:54,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:54,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300517940] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:58:54,817 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:58:54,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 95 [2023-11-06 21:58:54,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547895184] [2023-11-06 21:58:54,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:58:54,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2023-11-06 21:58:54,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:54,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2023-11-06 21:58:54,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2023-11-06 21:58:55,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 148 [2023-11-06 21:58:55,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 905 transitions, 14361 flow. Second operand has 97 states, 97 states have (on average 76.04123711340206) internal successors, (7376), 97 states have internal predecessors, (7376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:55,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:58:55,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 148 [2023-11-06 21:58:55,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:59:29,106 INFO L124 PetriNetUnfolderBase]: 27572/47969 cut-off events. [2023-11-06 21:59:29,106 INFO L125 PetriNetUnfolderBase]: For 6661735/6662844 co-relation queries the response was YES. [2023-11-06 21:59:29,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 227421 conditions, 47969 events. 27572/47969 cut-off events. For 6661735/6662844 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 347435 event pairs, 3087 based on Foata normal form. 3451/51420 useless extension candidates. Maximal degree in co-relation 227325. Up to 15703 conditions per place. [2023-11-06 21:59:29,921 INFO L140 encePairwiseOnDemand]: 143/148 looper letters, 491 selfloop transitions, 3322 changer transitions 282/4097 dead transitions. [2023-11-06 21:59:29,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 4097 transitions, 60840 flow [2023-11-06 21:59:29,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2023-11-06 21:59:29,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2023-11-06 21:59:29,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 8247 transitions. [2023-11-06 21:59:29,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5804476351351351 [2023-11-06 21:59:29,951 INFO L72 ComplementDD]: Start complementDD. Operand 96 states and 8247 transitions. [2023-11-06 21:59:29,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 96 states and 8247 transitions. [2023-11-06 21:59:29,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:59:29,961 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 96 states and 8247 transitions. [2023-11-06 21:59:29,997 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 97 states, 96 states have (on average 85.90625) internal successors, (8247), 96 states have internal predecessors, (8247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:59:30,038 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 97 states, 97 states have (on average 148.0) internal successors, (14356), 97 states have internal predecessors, (14356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:59:30,044 INFO L81 ComplementDD]: Finished complementDD. Result has 97 states, 97 states have (on average 148.0) internal successors, (14356), 97 states have internal predecessors, (14356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:59:30,045 INFO L175 Difference]: Start difference. First operand has 194 places, 905 transitions, 14361 flow. Second operand 96 states and 8247 transitions. [2023-11-06 21:59:30,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 4097 transitions, 60840 flow [2023-11-06 21:59:41,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 4097 transitions, 49624 flow, removed 5417 selfloop flow, removed 11 redundant places. [2023-11-06 21:59:41,088 INFO L231 Difference]: Finished difference. Result has 372 places, 3345 transitions, 53032 flow [2023-11-06 21:59:41,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=13127, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=905, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=890, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=96, PETRI_FLOW=53032, PETRI_PLACES=372, PETRI_TRANSITIONS=3345} [2023-11-06 21:59:41,090 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 346 predicate places. [2023-11-06 21:59:41,090 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 3345 transitions, 53032 flow [2023-11-06 21:59:41,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 76.04123711340206) internal successors, (7376), 97 states have internal predecessors, (7376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:59:41,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:59:41,093 INFO L208 CegarLoopForPetriNet]: trace histogram [94, 1, 1, 1, 1] [2023-11-06 21:59:41,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fd385c-e484-4bc1-afd5-8470548f32b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 21:59:41,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fd385c-e484-4bc1-afd5-8470548f32b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 21:59:41,300 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-06 21:59:41,300 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:59:41,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1274668519, now seen corresponding path program 6 times [2023-11-06 21:59:41,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:59:41,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6017594] [2023-11-06 21:59:41,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:41,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:59:41,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:48,239 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:59:48,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:59:48,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6017594] [2023-11-06 21:59:48,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6017594] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:59:48,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577336023] [2023-11-06 21:59:48,240 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 21:59:48,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:59:48,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fd385c-e484-4bc1-afd5-8470548f32b5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:59:48,242 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fd385c-e484-4bc1-afd5-8470548f32b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:59:48,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fd385c-e484-4bc1-afd5-8470548f32b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 21:59:48,589 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 48 check-sat command(s) [2023-11-06 21:59:48,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:59:48,596 INFO L262 TraceCheckSpWp]: Trace formula consists of 905 conjuncts, 97 conjunts are in the unsatisfiable core [2023-11-06 21:59:48,609 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:59:48,886 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:59:48,886 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:00:01,516 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:00:01,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577336023] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:00:01,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:00:01,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95, 95] total 191 [2023-11-06 22:00:01,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345920595] [2023-11-06 22:00:01,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:00:01,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2023-11-06 22:00:01,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:00:01,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2023-11-06 22:00:01,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2023-11-06 22:00:02,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 148 [2023-11-06 22:00:02,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 3345 transitions, 53032 flow. Second operand has 193 states, 193 states have (on average 76.02072538860104) internal successors, (14672), 193 states have internal predecessors, (14672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:00:02,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:00:02,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 148 [2023-11-06 22:00:02,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand