./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/parallel-misc-3-extended.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_f35938a5-f1e7-40c4-97d1-59d057359109/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35938a5-f1e7-40c4-97d1-59d057359109/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_f35938a5-f1e7-40c4-97d1-59d057359109/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35938a5-f1e7-40c4-97d1-59d057359109/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/parallel-misc-3-extended.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35938a5-f1e7-40c4-97d1-59d057359109/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_f35938a5-f1e7-40c4-97d1-59d057359109/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 b699de581afb3d801299d89a35eee78f9e3cb86ad1a23fab537b92eb394c5e62 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:26:39,290 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:26:39,382 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35938a5-f1e7-40c4-97d1-59d057359109/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-11-06 22:26:39,389 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:26:39,390 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:26:39,426 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:26:39,427 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:26:39,427 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:26:39,429 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:26:39,429 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:26:39,431 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:26:39,432 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:26:39,432 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:26:39,433 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:26:39,434 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:26:39,435 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:26:39,435 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:26:39,436 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:26:39,436 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:26:39,437 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:26:39,438 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:26:39,446 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:26:39,447 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-06 22:26:39,447 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 22:26:39,448 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:26:39,448 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:26:39,449 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:26:39,449 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:26:39,451 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:26:39,451 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:26:39,453 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:26:39,453 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:26:39,454 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:26:39,454 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:26:39,454 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:26:39,455 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:26:39,455 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:26:39,455 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:26:39,456 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:26:39,456 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:26:39,456 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:26:39,457 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_f35938a5-f1e7-40c4-97d1-59d057359109/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35938a5-f1e7-40c4-97d1-59d057359109/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b699de581afb3d801299d89a35eee78f9e3cb86ad1a23fab537b92eb394c5e62 [2023-11-06 22:26:39,783 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:26:39,819 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:26:39,823 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:26:39,824 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:26:39,825 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:26:39,826 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35938a5-f1e7-40c4-97d1-59d057359109/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/parallel-misc-3-extended.wvr.c [2023-11-06 22:26:43,811 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:26:44,082 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:26:44,083 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35938a5-f1e7-40c4-97d1-59d057359109/sv-benchmarks/c/weaver/parallel-misc-3-extended.wvr.c [2023-11-06 22:26:44,094 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35938a5-f1e7-40c4-97d1-59d057359109/bin/uautomizer-verify-WvqO1wxjHP/data/32d8e4e7f/371cf38867cb4588aa21cca3c2918701/FLAGbdd51d5ae [2023-11-06 22:26:44,112 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35938a5-f1e7-40c4-97d1-59d057359109/bin/uautomizer-verify-WvqO1wxjHP/data/32d8e4e7f/371cf38867cb4588aa21cca3c2918701 [2023-11-06 22:26:44,116 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:26:44,118 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:26:44,120 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:26:44,120 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:26:44,127 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:26:44,128 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:26:44" (1/1) ... [2023-11-06 22:26:44,129 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28e4dff6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:44, skipping insertion in model container [2023-11-06 22:26:44,130 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:26:44" (1/1) ... [2023-11-06 22:26:44,162 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:26:44,455 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:26:44,469 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:26:44,521 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:26:44,535 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:26:44,535 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:26:44,545 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:26:44,546 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:44 WrapperNode [2023-11-06 22:26:44,546 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:26:44,548 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:26:44,548 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:26:44,548 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:26:44,558 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:44" (1/1) ... [2023-11-06 22:26:44,582 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:44" (1/1) ... [2023-11-06 22:26:44,611 INFO L138 Inliner]: procedures = 22, calls = 38, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 72 [2023-11-06 22:26:44,611 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:26:44,612 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:26:44,612 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:26:44,613 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:26:44,624 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:44" (1/1) ... [2023-11-06 22:26:44,625 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:44" (1/1) ... [2023-11-06 22:26:44,628 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:44" (1/1) ... [2023-11-06 22:26:44,629 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:44" (1/1) ... [2023-11-06 22:26:44,637 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:44" (1/1) ... [2023-11-06 22:26:44,652 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:44" (1/1) ... [2023-11-06 22:26:44,654 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:44" (1/1) ... [2023-11-06 22:26:44,656 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:44" (1/1) ... [2023-11-06 22:26:44,660 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:26:44,661 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:26:44,662 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:26:44,662 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:26:44,664 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:44" (1/1) ... [2023-11-06 22:26:44,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:26:44,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35938a5-f1e7-40c4-97d1-59d057359109/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:26:44,711 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35938a5-f1e7-40c4-97d1-59d057359109/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:26:44,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35938a5-f1e7-40c4-97d1-59d057359109/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:26:44,776 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:26:44,776 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 22:26:44,777 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 22:26:44,777 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 22:26:44,777 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 22:26:44,777 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-06 22:26:44,778 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-06 22:26:44,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:26:44,779 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:26:44,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:26:44,779 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-06 22:26:44,780 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-06 22:26:44,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:26:44,783 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:26:44,783 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:26:44,783 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:26:44,785 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 22:26:44,965 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:26:44,967 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:26:45,460 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:26:45,614 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:26:45,614 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-06 22:26:45,618 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:26:45 BoogieIcfgContainer [2023-11-06 22:26:45,618 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:26:45,622 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:26:45,622 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:26:45,631 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:26:45,631 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:26:44" (1/3) ... [2023-11-06 22:26:45,633 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@569157dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:26:45, skipping insertion in model container [2023-11-06 22:26:45,634 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:44" (2/3) ... [2023-11-06 22:26:45,634 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@569157dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:26:45, skipping insertion in model container [2023-11-06 22:26:45,635 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:26:45" (3/3) ... [2023-11-06 22:26:45,637 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-3-extended.wvr.c [2023-11-06 22:26:45,658 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 22:26:45,671 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:26:45,671 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2023-11-06 22:26:45,671 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:26:45,782 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-06 22:26:45,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 142 transitions, 305 flow [2023-11-06 22:26:45,921 INFO L124 PetriNetUnfolderBase]: 16/139 cut-off events. [2023-11-06 22:26:45,922 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 22:26:45,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152 conditions, 139 events. 16/139 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 215 event pairs, 0 based on Foata normal form. 0/111 useless extension candidates. Maximal degree in co-relation 87. Up to 4 conditions per place. [2023-11-06 22:26:45,934 INFO L82 GeneralOperation]: Start removeDead. Operand has 136 places, 142 transitions, 305 flow [2023-11-06 22:26:45,942 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 110 places, 115 transitions, 245 flow [2023-11-06 22:26:45,947 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:26:45,959 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 110 places, 115 transitions, 245 flow [2023-11-06 22:26:45,963 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 110 places, 115 transitions, 245 flow [2023-11-06 22:26:45,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 110 places, 115 transitions, 245 flow [2023-11-06 22:26:46,012 INFO L124 PetriNetUnfolderBase]: 15/115 cut-off events. [2023-11-06 22:26:46,013 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:26:46,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127 conditions, 115 events. 15/115 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 215 event pairs, 0 based on Foata normal form. 0/88 useless extension candidates. Maximal degree in co-relation 87. Up to 4 conditions per place. [2023-11-06 22:26:46,022 INFO L119 LiptonReduction]: Number of co-enabled transitions 4488 [2023-11-06 22:26:52,998 INFO L134 LiptonReduction]: Checked pairs total: 4663 [2023-11-06 22:26:52,999 INFO L136 LiptonReduction]: Total number of compositions: 118 [2023-11-06 22:26:53,019 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:26:53,028 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;@2947d9af, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:26:53,028 INFO L358 AbstractCegarLoop]: Starting to check reachability of 27 error locations. [2023-11-06 22:26:53,033 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:26:53,033 INFO L124 PetriNetUnfolderBase]: 1/3 cut-off events. [2023-11-06 22:26:53,034 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:26:53,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:26:53,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 22:26:53,035 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2023-11-06 22:26:53,042 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:53,042 INFO L85 PathProgramCache]: Analyzing trace with hash 600942, now seen corresponding path program 1 times [2023-11-06 22:26:53,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:26:53,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467448764] [2023-11-06 22:26:53,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:53,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:26:53,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:53,490 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 22:26:53,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:26:53,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467448764] [2023-11-06 22:26:53,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467448764] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:26:53,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:26:53,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:26:53,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088013714] [2023-11-06 22:26:53,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:26:53,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:26:53,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:26:53,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:26:53,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:26:53,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 260 [2023-11-06 22:26:53,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 29 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 0 states have call successors, (0), 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 22:26:53,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:26:53,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 260 [2023-11-06 22:26:53,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:26:54,126 INFO L124 PetriNetUnfolderBase]: 1473/2114 cut-off events. [2023-11-06 22:26:54,126 INFO L125 PetriNetUnfolderBase]: For 177/177 co-relation queries the response was YES. [2023-11-06 22:26:54,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4379 conditions, 2114 events. 1473/2114 cut-off events. For 177/177 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 9669 event pairs, 573 based on Foata normal form. 0/730 useless extension candidates. Maximal degree in co-relation 3776. Up to 2037 conditions per place. [2023-11-06 22:26:54,155 INFO L140 encePairwiseOnDemand]: 244/260 looper letters, 40 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2023-11-06 22:26:54,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 44 transitions, 203 flow [2023-11-06 22:26:54,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:26:54,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:26:54,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 392 transitions. [2023-11-06 22:26:54,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5025641025641026 [2023-11-06 22:26:54,177 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 392 transitions. [2023-11-06 22:26:54,178 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 392 transitions. [2023-11-06 22:26:54,180 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:26:54,183 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 392 transitions. [2023-11-06 22:26:54,188 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 0 states have call successors, (0), 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 22:26:54,194 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 260.0) internal successors, (1040), 4 states have internal predecessors, (1040), 0 states have call successors, (0), 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 22:26:54,196 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 260.0) internal successors, (1040), 4 states have internal predecessors, (1040), 0 states have call successors, (0), 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 22:26:54,198 INFO L175 Difference]: Start difference. First operand has 36 places, 29 transitions, 73 flow. Second operand 3 states and 392 transitions. [2023-11-06 22:26:54,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 44 transitions, 203 flow [2023-11-06 22:26:54,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 44 transitions, 187 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-06 22:26:54,206 INFO L231 Difference]: Finished difference. Result has 34 places, 32 transitions, 112 flow [2023-11-06 22:26:54,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=34, PETRI_TRANSITIONS=32} [2023-11-06 22:26:54,214 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -2 predicate places. [2023-11-06 22:26:54,214 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 32 transitions, 112 flow [2023-11-06 22:26:54,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 0 states have call successors, (0), 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 22:26:54,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:26:54,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 22:26:54,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:26:54,216 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2023-11-06 22:26:54,216 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:54,216 INFO L85 PathProgramCache]: Analyzing trace with hash 18631069, now seen corresponding path program 1 times [2023-11-06 22:26:54,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:26:54,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375512514] [2023-11-06 22:26:54,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:54,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:26:54,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:54,428 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 22:26:54,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:26:54,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375512514] [2023-11-06 22:26:54,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375512514] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:26:54,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139227173] [2023-11-06 22:26:54,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:54,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:26:54,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35938a5-f1e7-40c4-97d1-59d057359109/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:26:54,434 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35938a5-f1e7-40c4-97d1-59d057359109/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:26:54,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35938a5-f1e7-40c4-97d1-59d057359109/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:26:54,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:54,558 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:26:54,564 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:26:55,039 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 22:26:55,039 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:26:55,178 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 22:26:55,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139227173] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:26:55,180 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:26:55,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-11-06 22:26:55,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374849163] [2023-11-06 22:26:55,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:26:55,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:26:55,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:26:55,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:26:55,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:26:55,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 260 [2023-11-06 22:26:55,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 32 transitions, 112 flow. Second operand has 8 states, 8 states have (on average 106.5) internal successors, (852), 8 states have internal predecessors, (852), 0 states have call successors, (0), 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 22:26:55,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:26:55,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 260 [2023-11-06 22:26:55,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:26:57,095 INFO L124 PetriNetUnfolderBase]: 4078/6181 cut-off events. [2023-11-06 22:26:57,096 INFO L125 PetriNetUnfolderBase]: For 290/290 co-relation queries the response was YES. [2023-11-06 22:26:57,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16421 conditions, 6181 events. 4078/6181 cut-off events. For 290/290 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 37588 event pairs, 159 based on Foata normal form. 0/3427 useless extension candidates. Maximal degree in co-relation 11196. Up to 3797 conditions per place. [2023-11-06 22:26:57,169 INFO L140 encePairwiseOnDemand]: 244/260 looper letters, 142 selfloop transitions, 56 changer transitions 0/198 dead transitions. [2023-11-06 22:26:57,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 198 transitions, 1016 flow [2023-11-06 22:26:57,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 22:26:57,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-06 22:26:57,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1510 transitions. [2023-11-06 22:26:57,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.483974358974359 [2023-11-06 22:26:57,180 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1510 transitions. [2023-11-06 22:26:57,180 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1510 transitions. [2023-11-06 22:26:57,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:26:57,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1510 transitions. [2023-11-06 22:26:57,189 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 125.83333333333333) internal successors, (1510), 12 states have internal predecessors, (1510), 0 states have call successors, (0), 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 22:26:57,199 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 260.0) internal successors, (3380), 13 states have internal predecessors, (3380), 0 states have call successors, (0), 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 22:26:57,203 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 260.0) internal successors, (3380), 13 states have internal predecessors, (3380), 0 states have call successors, (0), 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 22:26:57,204 INFO L175 Difference]: Start difference. First operand has 34 places, 32 transitions, 112 flow. Second operand 12 states and 1510 transitions. [2023-11-06 22:26:57,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 198 transitions, 1016 flow [2023-11-06 22:26:57,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 198 transitions, 1012 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:26:57,212 INFO L231 Difference]: Finished difference. Result has 52 places, 94 transitions, 673 flow [2023-11-06 22:26:57,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=673, PETRI_PLACES=52, PETRI_TRANSITIONS=94} [2023-11-06 22:26:57,214 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 16 predicate places. [2023-11-06 22:26:57,214 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 94 transitions, 673 flow [2023-11-06 22:26:57,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 106.5) internal successors, (852), 8 states have internal predecessors, (852), 0 states have call successors, (0), 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 22:26:57,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:26:57,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 22:26:57,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35938a5-f1e7-40c4-97d1-59d057359109/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:26:57,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35938a5-f1e7-40c4-97d1-59d057359109/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:26:57,430 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2023-11-06 22:26:57,431 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:57,431 INFO L85 PathProgramCache]: Analyzing trace with hash 18631081, now seen corresponding path program 1 times [2023-11-06 22:26:57,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:26:57,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367848577] [2023-11-06 22:26:57,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:57,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:26:57,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:57,651 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 22:26:57,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:26:57,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367848577] [2023-11-06 22:26:57,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367848577] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:26:57,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431004905] [2023-11-06 22:26:57,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:57,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:26:57,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35938a5-f1e7-40c4-97d1-59d057359109/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:26:57,655 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35938a5-f1e7-40c4-97d1-59d057359109/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:26:57,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35938a5-f1e7-40c4-97d1-59d057359109/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:26:57,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:57,753 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:26:57,755 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:26:58,036 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 22:26:58,036 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:26:58,336 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 22:26:58,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431004905] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:26:58,337 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:26:58,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-11-06 22:26:58,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107638697] [2023-11-06 22:26:58,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:26:58,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:26:58,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:26:58,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:26:58,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:26:58,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 260 [2023-11-06 22:26:58,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 94 transitions, 673 flow. Second operand has 8 states, 8 states have (on average 106.5) internal successors, (852), 8 states have internal predecessors, (852), 0 states have call successors, (0), 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 22:26:58,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:26:58,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 260 [2023-11-06 22:26:58,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:27:00,515 INFO L124 PetriNetUnfolderBase]: 5525/8404 cut-off events. [2023-11-06 22:27:00,515 INFO L125 PetriNetUnfolderBase]: For 22813/22813 co-relation queries the response was YES. [2023-11-06 22:27:00,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35753 conditions, 8404 events. 5525/8404 cut-off events. For 22813/22813 co-relation queries the response was YES. Maximal size of possible extension queue 663. Compared 52991 event pairs, 147 based on Foata normal form. 844/8544 useless extension candidates. Maximal degree in co-relation 26042. Up to 5051 conditions per place. [2023-11-06 22:27:00,625 INFO L140 encePairwiseOnDemand]: 244/260 looper letters, 131 selfloop transitions, 73 changer transitions 0/204 dead transitions. [2023-11-06 22:27:00,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 204 transitions, 1757 flow [2023-11-06 22:27:00,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:27:00,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-06 22:27:00,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 982 transitions. [2023-11-06 22:27:00,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4721153846153846 [2023-11-06 22:27:00,632 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 982 transitions. [2023-11-06 22:27:00,632 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 982 transitions. [2023-11-06 22:27:00,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:27:00,634 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 982 transitions. [2023-11-06 22:27:00,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 122.75) internal successors, (982), 8 states have internal predecessors, (982), 0 states have call successors, (0), 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 22:27:00,644 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 260.0) internal successors, (2340), 9 states have internal predecessors, (2340), 0 states have call successors, (0), 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 22:27:00,647 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 260.0) internal successors, (2340), 9 states have internal predecessors, (2340), 0 states have call successors, (0), 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 22:27:00,647 INFO L175 Difference]: Start difference. First operand has 52 places, 94 transitions, 673 flow. Second operand 8 states and 982 transitions. [2023-11-06 22:27:00,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 204 transitions, 1757 flow [2023-11-06 22:27:01,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 204 transitions, 1622 flow, removed 65 selfloop flow, removed 3 redundant places. [2023-11-06 22:27:01,378 INFO L231 Difference]: Finished difference. Result has 60 places, 136 transitions, 1392 flow [2023-11-06 22:27:01,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=446, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1392, PETRI_PLACES=60, PETRI_TRANSITIONS=136} [2023-11-06 22:27:01,381 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 24 predicate places. [2023-11-06 22:27:01,381 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 136 transitions, 1392 flow [2023-11-06 22:27:01,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 106.5) internal successors, (852), 8 states have internal predecessors, (852), 0 states have call successors, (0), 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 22:27:01,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:27:01,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:27:01,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35938a5-f1e7-40c4-97d1-59d057359109/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:27:01,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35938a5-f1e7-40c4-97d1-59d057359109/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:27:01,589 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2023-11-06 22:27:01,590 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:27:01,590 INFO L85 PathProgramCache]: Analyzing trace with hash 974502825, now seen corresponding path program 1 times [2023-11-06 22:27:01,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:27:01,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643111248] [2023-11-06 22:27:01,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:27:01,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:27:01,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:27:01,875 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 22:27:01,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:27:01,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643111248] [2023-11-06 22:27:01,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643111248] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:27:01,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292036530] [2023-11-06 22:27:01,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:27:01,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:27:01,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35938a5-f1e7-40c4-97d1-59d057359109/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:27:01,878 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35938a5-f1e7-40c4-97d1-59d057359109/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:27:01,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35938a5-f1e7-40c4-97d1-59d057359109/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:27:01,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:27:01,983 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:27:01,987 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:27:02,114 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 22:27:02,114 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:27:02,370 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 22:27:02,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292036530] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:27:02,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:27:02,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3, 3] total 8 [2023-11-06 22:27:02,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407971699] [2023-11-06 22:27:02,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:27:02,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:27:02,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:27:02,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:27:02,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:27:02,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 260 [2023-11-06 22:27:02,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 136 transitions, 1392 flow. Second operand has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 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 22:27:02,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:27:02,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 260 [2023-11-06 22:27:02,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:27:04,177 INFO L124 PetriNetUnfolderBase]: 4826/7353 cut-off events. [2023-11-06 22:27:04,178 INFO L125 PetriNetUnfolderBase]: For 38865/38865 co-relation queries the response was YES. [2023-11-06 22:27:04,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36199 conditions, 7353 events. 4826/7353 cut-off events. For 38865/38865 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 44782 event pairs, 2301 based on Foata normal form. 236/7563 useless extension candidates. Maximal degree in co-relation 25419. Up to 7353 conditions per place. [2023-11-06 22:27:04,260 INFO L140 encePairwiseOnDemand]: 258/260 looper letters, 127 selfloop transitions, 1 changer transitions 0/128 dead transitions. [2023-11-06 22:27:04,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 128 transitions, 1565 flow [2023-11-06 22:27:04,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:27:04,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:27:04,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 350 transitions. [2023-11-06 22:27:04,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44871794871794873 [2023-11-06 22:27:04,271 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 350 transitions. [2023-11-06 22:27:04,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 350 transitions. [2023-11-06 22:27:04,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:27:04,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 350 transitions. [2023-11-06 22:27:04,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 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 22:27:04,277 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 260.0) internal successors, (1040), 4 states have internal predecessors, (1040), 0 states have call successors, (0), 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 22:27:04,277 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 260.0) internal successors, (1040), 4 states have internal predecessors, (1040), 0 states have call successors, (0), 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 22:27:04,277 INFO L175 Difference]: Start difference. First operand has 60 places, 136 transitions, 1392 flow. Second operand 3 states and 350 transitions. [2023-11-06 22:27:04,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 128 transitions, 1565 flow [2023-11-06 22:27:04,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 128 transitions, 1390 flow, removed 85 selfloop flow, removed 2 redundant places. [2023-11-06 22:27:04,832 INFO L231 Difference]: Finished difference. Result has 59 places, 128 transitions, 1136 flow [2023-11-06 22:27:04,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=1134, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1136, PETRI_PLACES=59, PETRI_TRANSITIONS=128} [2023-11-06 22:27:04,835 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 23 predicate places. [2023-11-06 22:27:04,835 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 128 transitions, 1136 flow [2023-11-06 22:27:04,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 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 22:27:04,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:27:04,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:27:04,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35938a5-f1e7-40c4-97d1-59d057359109/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:27:05,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35938a5-f1e7-40c4-97d1-59d057359109/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:27:05,043 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2023-11-06 22:27:05,043 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:27:05,043 INFO L85 PathProgramCache]: Analyzing trace with hash 978048911, now seen corresponding path program 1 times [2023-11-06 22:27:05,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:27:05,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292477980] [2023-11-06 22:27:05,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:27:05,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:27:05,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:27:05,174 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 22:27:05,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:27:05,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292477980] [2023-11-06 22:27:05,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292477980] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:27:05,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:27:05,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:27:05,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21895408] [2023-11-06 22:27:05,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:27:05,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:27:05,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:27:05,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:27:05,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:27:05,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 260 [2023-11-06 22:27:05,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 128 transitions, 1136 flow. Second operand has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 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 22:27:05,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:27:05,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 260 [2023-11-06 22:27:05,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:27:06,888 INFO L124 PetriNetUnfolderBase]: 4137/6308 cut-off events. [2023-11-06 22:27:06,889 INFO L125 PetriNetUnfolderBase]: For 22963/22963 co-relation queries the response was YES. [2023-11-06 22:27:06,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27195 conditions, 6308 events. 4137/6308 cut-off events. For 22963/22963 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 37485 event pairs, 2012 based on Foata normal form. 294/6578 useless extension candidates. Maximal degree in co-relation 27175. Up to 6308 conditions per place. [2023-11-06 22:27:06,966 INFO L140 encePairwiseOnDemand]: 258/260 looper letters, 119 selfloop transitions, 1 changer transitions 0/120 dead transitions. [2023-11-06 22:27:06,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 120 transitions, 1286 flow [2023-11-06 22:27:06,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:27:06,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:27:06,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 349 transitions. [2023-11-06 22:27:06,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44743589743589746 [2023-11-06 22:27:06,970 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 349 transitions. [2023-11-06 22:27:06,971 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 349 transitions. [2023-11-06 22:27:06,971 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:27:06,972 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 349 transitions. [2023-11-06 22:27:06,973 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 116.33333333333333) internal successors, (349), 3 states have internal predecessors, (349), 0 states have call successors, (0), 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 22:27:06,976 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 260.0) internal successors, (1040), 4 states have internal predecessors, (1040), 0 states have call successors, (0), 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 22:27:06,977 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 260.0) internal successors, (1040), 4 states have internal predecessors, (1040), 0 states have call successors, (0), 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 22:27:06,977 INFO L175 Difference]: Start difference. First operand has 59 places, 128 transitions, 1136 flow. Second operand 3 states and 349 transitions. [2023-11-06 22:27:06,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 120 transitions, 1286 flow [2023-11-06 22:27:07,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 120 transitions, 1285 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:27:07,247 INFO L231 Difference]: Finished difference. Result has 59 places, 120 transitions, 1047 flow [2023-11-06 22:27:07,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=1045, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1047, PETRI_PLACES=59, PETRI_TRANSITIONS=120} [2023-11-06 22:27:07,251 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 23 predicate places. [2023-11-06 22:27:07,251 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 120 transitions, 1047 flow [2023-11-06 22:27:07,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 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 22:27:07,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:27:07,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:27:07,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 22:27:07,253 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2023-11-06 22:27:07,253 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:27:07,253 INFO L85 PathProgramCache]: Analyzing trace with hash 978048901, now seen corresponding path program 1 times [2023-11-06 22:27:07,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:27:07,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656222586] [2023-11-06 22:27:07,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:27:07,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:27:07,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:27:07,447 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 22:27:07,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:27:07,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656222586] [2023-11-06 22:27:07,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656222586] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:27:07,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000764572] [2023-11-06 22:27:07,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:27:07,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:27:07,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35938a5-f1e7-40c4-97d1-59d057359109/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:27:07,451 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35938a5-f1e7-40c4-97d1-59d057359109/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:27:07,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35938a5-f1e7-40c4-97d1-59d057359109/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:27:07,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:27:07,564 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:27:07,568 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:27:08,114 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 22:27:08,114 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:27:08,300 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 22:27:08,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000764572] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:27:08,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:27:08,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3, 3] total 8 [2023-11-06 22:27:08,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874829513] [2023-11-06 22:27:08,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:27:08,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:27:08,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:27:08,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:27:08,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:27:08,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 260 [2023-11-06 22:27:08,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 120 transitions, 1047 flow. Second operand has 3 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 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 22:27:08,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:27:08,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 260 [2023-11-06 22:27:08,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:27:09,417 INFO L124 PetriNetUnfolderBase]: 3506/5381 cut-off events. [2023-11-06 22:27:09,418 INFO L125 PetriNetUnfolderBase]: For 19578/19578 co-relation queries the response was YES. [2023-11-06 22:27:09,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22774 conditions, 5381 events. 3506/5381 cut-off events. For 19578/19578 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 31364 event pairs, 1785 based on Foata normal form. 246/5603 useless extension candidates. Maximal degree in co-relation 22753. Up to 5381 conditions per place. [2023-11-06 22:27:09,472 INFO L140 encePairwiseOnDemand]: 258/260 looper letters, 111 selfloop transitions, 1 changer transitions 0/112 dead transitions. [2023-11-06 22:27:09,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 112 transitions, 1193 flow [2023-11-06 22:27:09,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:27:09,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:27:09,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 360 transitions. [2023-11-06 22:27:09,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2023-11-06 22:27:09,476 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 360 transitions. [2023-11-06 22:27:09,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 360 transitions. [2023-11-06 22:27:09,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:27:09,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 360 transitions. [2023-11-06 22:27:09,479 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 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 22:27:09,481 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 260.0) internal successors, (1040), 4 states have internal predecessors, (1040), 0 states have call successors, (0), 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 22:27:09,482 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 260.0) internal successors, (1040), 4 states have internal predecessors, (1040), 0 states have call successors, (0), 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 22:27:09,482 INFO L175 Difference]: Start difference. First operand has 59 places, 120 transitions, 1047 flow. Second operand 3 states and 360 transitions. [2023-11-06 22:27:09,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 112 transitions, 1193 flow [2023-11-06 22:27:09,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 112 transitions, 1192 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:27:09,656 INFO L231 Difference]: Finished difference. Result has 59 places, 112 transitions, 970 flow [2023-11-06 22:27:09,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=968, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=970, PETRI_PLACES=59, PETRI_TRANSITIONS=112} [2023-11-06 22:27:09,659 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 23 predicate places. [2023-11-06 22:27:09,660 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 112 transitions, 970 flow [2023-11-06 22:27:09,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 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 22:27:09,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:27:09,660 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:27:09,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35938a5-f1e7-40c4-97d1-59d057359109/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:27:09,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35938a5-f1e7-40c4-97d1-59d057359109/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-06 22:27:09,867 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2023-11-06 22:27:09,867 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:27:09,867 INFO L85 PathProgramCache]: Analyzing trace with hash 978048908, now seen corresponding path program 1 times [2023-11-06 22:27:09,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:27:09,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909139586] [2023-11-06 22:27:09,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:27:09,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:27:09,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:27:09,965 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 22:27:09,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:27:09,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909139586] [2023-11-06 22:27:09,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909139586] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:27:09,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616186833] [2023-11-06 22:27:09,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:27:09,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:27:09,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35938a5-f1e7-40c4-97d1-59d057359109/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:27:09,968 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35938a5-f1e7-40c4-97d1-59d057359109/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:27:09,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35938a5-f1e7-40c4-97d1-59d057359109/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:27:10,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:27:10,071 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:27:10,074 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:27:10,376 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 22:27:10,376 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:27:10,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616186833] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:27:10,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:27:10,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-06 22:27:10,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518346055] [2023-11-06 22:27:10,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:27:10,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:27:10,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:27:10,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:27:10,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:27:10,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 260 [2023-11-06 22:27:10,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 112 transitions, 970 flow. Second operand has 4 states, 4 states have (on average 112.75) internal successors, (451), 4 states have internal predecessors, (451), 0 states have call successors, (0), 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 22:27:10,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:27:10,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 260 [2023-11-06 22:27:10,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:27:11,154 INFO L124 PetriNetUnfolderBase]: 2527/3830 cut-off events. [2023-11-06 22:27:11,155 INFO L125 PetriNetUnfolderBase]: For 19154/19154 co-relation queries the response was YES. [2023-11-06 22:27:11,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15183 conditions, 3830 events. 2527/3830 cut-off events. For 19154/19154 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 20368 event pairs, 643 based on Foata normal form. 1054/4884 useless extension candidates. Maximal degree in co-relation 15161. Up to 2462 conditions per place. [2023-11-06 22:27:11,196 INFO L140 encePairwiseOnDemand]: 251/260 looper letters, 106 selfloop transitions, 36 changer transitions 0/142 dead transitions. [2023-11-06 22:27:11,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 142 transitions, 1447 flow [2023-11-06 22:27:11,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:27:11,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:27:11,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 494 transitions. [2023-11-06 22:27:11,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2023-11-06 22:27:11,200 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 494 transitions. [2023-11-06 22:27:11,200 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 494 transitions. [2023-11-06 22:27:11,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:27:11,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 494 transitions. [2023-11-06 22:27:11,203 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 123.5) internal successors, (494), 4 states have internal predecessors, (494), 0 states have call successors, (0), 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 22:27:11,206 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 260.0) internal successors, (1300), 5 states have internal predecessors, (1300), 0 states have call successors, (0), 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 22:27:11,206 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 260.0) internal successors, (1300), 5 states have internal predecessors, (1300), 0 states have call successors, (0), 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 22:27:11,207 INFO L175 Difference]: Start difference. First operand has 59 places, 112 transitions, 970 flow. Second operand 4 states and 494 transitions. [2023-11-06 22:27:11,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 142 transitions, 1447 flow [2023-11-06 22:27:11,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 142 transitions, 1442 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-06 22:27:11,313 INFO L231 Difference]: Finished difference. Result has 58 places, 117 transitions, 1204 flow [2023-11-06 22:27:11,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=731, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1204, PETRI_PLACES=58, PETRI_TRANSITIONS=117} [2023-11-06 22:27:11,314 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 22 predicate places. [2023-11-06 22:27:11,314 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 117 transitions, 1204 flow [2023-11-06 22:27:11,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 112.75) internal successors, (451), 4 states have internal predecessors, (451), 0 states have call successors, (0), 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 22:27:11,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:27:11,315 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-11-06 22:27:11,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35938a5-f1e7-40c4-97d1-59d057359109/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:27:11,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35938a5-f1e7-40c4-97d1-59d057359109/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-06 22:27:11,522 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2023-11-06 22:27:11,523 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:27:11,523 INFO L85 PathProgramCache]: Analyzing trace with hash 144817998, now seen corresponding path program 1 times [2023-11-06 22:27:11,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:27:11,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364057975] [2023-11-06 22:27:11,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:27:11,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:27:11,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:27:11,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:27:11,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:27:11,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364057975] [2023-11-06 22:27:11,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364057975] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:27:11,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620638869] [2023-11-06 22:27:11,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:27:11,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:27:11,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35938a5-f1e7-40c4-97d1-59d057359109/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:27:11,762 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35938a5-f1e7-40c4-97d1-59d057359109/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:27:11,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35938a5-f1e7-40c4-97d1-59d057359109/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:27:11,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:27:11,864 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 22:27:11,869 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:27:12,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:27:12,045 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:27:12,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:27:12,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620638869] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:27:12,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:27:12,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2023-11-06 22:27:12,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963252216] [2023-11-06 22:27:12,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:27:12,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 22:27:12,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:27:12,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 22:27:12,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:27:12,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 260 [2023-11-06 22:27:12,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 117 transitions, 1204 flow. Second operand has 14 states, 14 states have (on average 91.71428571428571) internal successors, (1284), 14 states have internal predecessors, (1284), 0 states have call successors, (0), 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 22:27:12,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:27:12,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 260 [2023-11-06 22:27:12,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:27:15,446 INFO L124 PetriNetUnfolderBase]: 5912/8803 cut-off events. [2023-11-06 22:27:15,447 INFO L125 PetriNetUnfolderBase]: For 38751/38751 co-relation queries the response was YES. [2023-11-06 22:27:15,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38770 conditions, 8803 events. 5912/8803 cut-off events. For 38751/38751 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 52029 event pairs, 307 based on Foata normal form. 330/9133 useless extension candidates. Maximal degree in co-relation 38746. Up to 3357 conditions per place. [2023-11-06 22:27:15,543 INFO L140 encePairwiseOnDemand]: 248/260 looper letters, 191 selfloop transitions, 238 changer transitions 0/429 dead transitions. [2023-11-06 22:27:15,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 429 transitions, 4726 flow [2023-11-06 22:27:15,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 22:27:15,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-06 22:27:15,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1467 transitions. [2023-11-06 22:27:15,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40302197802197803 [2023-11-06 22:27:15,552 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1467 transitions. [2023-11-06 22:27:15,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1467 transitions. [2023-11-06 22:27:15,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:27:15,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1467 transitions. [2023-11-06 22:27:15,561 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 104.78571428571429) internal successors, (1467), 14 states have internal predecessors, (1467), 0 states have call successors, (0), 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 22:27:15,570 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 260.0) internal successors, (3900), 15 states have internal predecessors, (3900), 0 states have call successors, (0), 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 22:27:15,572 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 260.0) internal successors, (3900), 15 states have internal predecessors, (3900), 0 states have call successors, (0), 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 22:27:15,573 INFO L175 Difference]: Start difference. First operand has 58 places, 117 transitions, 1204 flow. Second operand 14 states and 1467 transitions. [2023-11-06 22:27:15,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 429 transitions, 4726 flow [2023-11-06 22:27:15,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 429 transitions, 4725 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:27:15,879 INFO L231 Difference]: Finished difference. Result has 82 places, 305 transitions, 4485 flow [2023-11-06 22:27:15,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=1203, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4485, PETRI_PLACES=82, PETRI_TRANSITIONS=305} [2023-11-06 22:27:15,883 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 46 predicate places. [2023-11-06 22:27:15,883 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 305 transitions, 4485 flow [2023-11-06 22:27:15,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 91.71428571428571) internal successors, (1284), 14 states have internal predecessors, (1284), 0 states have call successors, (0), 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 22:27:15,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:27:15,885 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-11-06 22:27:15,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35938a5-f1e7-40c4-97d1-59d057359109/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:27:16,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35938a5-f1e7-40c4-97d1-59d057359109/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:27:16,092 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2023-11-06 22:27:16,092 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:27:16,093 INFO L85 PathProgramCache]: Analyzing trace with hash 144817975, now seen corresponding path program 1 times [2023-11-06 22:27:16,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:27:16,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630678878] [2023-11-06 22:27:16,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:27:16,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:27:16,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:27:16,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:27:16,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:27:16,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630678878] [2023-11-06 22:27:16,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630678878] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:27:16,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750894417] [2023-11-06 22:27:16,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:27:16,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:27:16,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35938a5-f1e7-40c4-97d1-59d057359109/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:27:16,422 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35938a5-f1e7-40c4-97d1-59d057359109/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:27:16,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35938a5-f1e7-40c4-97d1-59d057359109/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:27:16,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:27:16,524 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:27:16,528 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:27:16,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:27:16,712 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:27:17,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:27:17,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750894417] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:27:17,730 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:27:17,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2023-11-06 22:27:17,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158051450] [2023-11-06 22:27:17,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:27:17,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 22:27:17,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:27:17,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 22:27:17,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:27:17,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 260 [2023-11-06 22:27:17,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 305 transitions, 4485 flow. Second operand has 14 states, 14 states have (on average 95.71428571428571) internal successors, (1340), 14 states have internal predecessors, (1340), 0 states have call successors, (0), 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 22:27:17,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:27:17,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 260 [2023-11-06 22:27:17,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:27:22,298 INFO L124 PetriNetUnfolderBase]: 9805/14386 cut-off events. [2023-11-06 22:27:22,298 INFO L125 PetriNetUnfolderBase]: For 147276/147276 co-relation queries the response was YES. [2023-11-06 22:27:22,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85478 conditions, 14386 events. 9805/14386 cut-off events. For 147276/147276 co-relation queries the response was YES. Maximal size of possible extension queue 788. Compared 88336 event pairs, 691 based on Foata normal form. 518/14904 useless extension candidates. Maximal degree in co-relation 85441. Up to 5869 conditions per place. [2023-11-06 22:27:22,430 INFO L140 encePairwiseOnDemand]: 249/260 looper letters, 319 selfloop transitions, 459 changer transitions 0/778 dead transitions. [2023-11-06 22:27:22,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 778 transitions, 11846 flow [2023-11-06 22:27:22,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-06 22:27:22,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-06 22:27:22,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1845 transitions. [2023-11-06 22:27:22,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.417420814479638 [2023-11-06 22:27:22,441 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1845 transitions. [2023-11-06 22:27:22,441 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1845 transitions. [2023-11-06 22:27:22,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:27:22,443 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1845 transitions. [2023-11-06 22:27:22,448 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 108.52941176470588) internal successors, (1845), 17 states have internal predecessors, (1845), 0 states have call successors, (0), 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 22:27:22,458 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 260.0) internal successors, (4680), 18 states have internal predecessors, (4680), 0 states have call successors, (0), 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 22:27:22,459 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 260.0) internal successors, (4680), 18 states have internal predecessors, (4680), 0 states have call successors, (0), 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 22:27:22,460 INFO L175 Difference]: Start difference. First operand has 82 places, 305 transitions, 4485 flow. Second operand 17 states and 1845 transitions. [2023-11-06 22:27:22,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 778 transitions, 11846 flow [2023-11-06 22:27:24,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 778 transitions, 11105 flow, removed 368 selfloop flow, removed 2 redundant places. [2023-11-06 22:27:24,292 INFO L231 Difference]: Finished difference. Result has 110 places, 594 transitions, 10563 flow [2023-11-06 22:27:24,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=3818, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=10563, PETRI_PLACES=110, PETRI_TRANSITIONS=594} [2023-11-06 22:27:24,294 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 74 predicate places. [2023-11-06 22:27:24,294 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 594 transitions, 10563 flow [2023-11-06 22:27:24,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 95.71428571428571) internal successors, (1340), 14 states have internal predecessors, (1340), 0 states have call successors, (0), 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 22:27:24,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:27:24,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:27:24,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35938a5-f1e7-40c4-97d1-59d057359109/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:27:24,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35938a5-f1e7-40c4-97d1-59d057359109/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:27:24,496 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2023-11-06 22:27:24,496 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:27:24,496 INFO L85 PathProgramCache]: Analyzing trace with hash 974503748, now seen corresponding path program 2 times [2023-11-06 22:27:24,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:27:24,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503409179] [2023-11-06 22:27:24,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:27:24,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:27:24,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:27:24,622 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 22:27:24,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:27:24,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503409179] [2023-11-06 22:27:24,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503409179] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:27:24,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499666563] [2023-11-06 22:27:24,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:27:24,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:27:24,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35938a5-f1e7-40c4-97d1-59d057359109/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:27:24,624 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35938a5-f1e7-40c4-97d1-59d057359109/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:27:24,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35938a5-f1e7-40c4-97d1-59d057359109/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:27:24,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:27:24,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:27:24,732 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 22:27:24,733 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:27:24,833 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 22:27:24,834 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:27:25,332 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 22:27:25,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499666563] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:27:25,333 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:27:25,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2023-11-06 22:27:25,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942511743] [2023-11-06 22:27:25,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:27:25,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 22:27:25,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:27:25,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 22:27:25,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:27:25,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 260 [2023-11-06 22:27:25,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 594 transitions, 10563 flow. Second operand has 11 states, 11 states have (on average 97.9090909090909) internal successors, (1077), 11 states have internal predecessors, (1077), 0 states have call successors, (0), 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 22:27:25,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:27:25,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 260 [2023-11-06 22:27:25,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:27:34,049 INFO L124 PetriNetUnfolderBase]: 16637/24254 cut-off events. [2023-11-06 22:27:34,049 INFO L125 PetriNetUnfolderBase]: For 409609/409609 co-relation queries the response was YES. [2023-11-06 22:27:34,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173488 conditions, 24254 events. 16637/24254 cut-off events. For 409609/409609 co-relation queries the response was YES. Maximal size of possible extension queue 1368. Compared 157792 event pairs, 1023 based on Foata normal form. 622/24876 useless extension candidates. Maximal degree in co-relation 173437. Up to 8029 conditions per place. [2023-11-06 22:27:34,348 INFO L140 encePairwiseOnDemand]: 249/260 looper letters, 603 selfloop transitions, 996 changer transitions 0/1599 dead transitions. [2023-11-06 22:27:34,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 1599 transitions, 30359 flow [2023-11-06 22:27:34,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 22:27:34,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-06 22:27:34,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1988 transitions. [2023-11-06 22:27:34,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4247863247863248 [2023-11-06 22:27:34,364 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1988 transitions. [2023-11-06 22:27:34,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1988 transitions. [2023-11-06 22:27:34,369 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:27:34,369 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1988 transitions. [2023-11-06 22:27:34,374 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 110.44444444444444) internal successors, (1988), 18 states have internal predecessors, (1988), 0 states have call successors, (0), 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 22:27:34,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 260.0) internal successors, (4940), 19 states have internal predecessors, (4940), 0 states have call successors, (0), 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 22:27:34,385 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 260.0) internal successors, (4940), 19 states have internal predecessors, (4940), 0 states have call successors, (0), 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 22:27:34,385 INFO L175 Difference]: Start difference. First operand has 110 places, 594 transitions, 10563 flow. Second operand 18 states and 1988 transitions. [2023-11-06 22:27:34,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 1599 transitions, 30359 flow [2023-11-06 22:27:46,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 1599 transitions, 28782 flow, removed 771 selfloop flow, removed 6 redundant places. [2023-11-06 22:27:46,733 INFO L231 Difference]: Finished difference. Result has 136 places, 1367 transitions, 27968 flow [2023-11-06 22:27:46,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=9889, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=370, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=27968, PETRI_PLACES=136, PETRI_TRANSITIONS=1367} [2023-11-06 22:27:46,735 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 100 predicate places. [2023-11-06 22:27:46,735 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 1367 transitions, 27968 flow [2023-11-06 22:27:46,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 97.9090909090909) internal successors, (1077), 11 states have internal predecessors, (1077), 0 states have call successors, (0), 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 22:27:46,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:27:46,736 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2023-11-06 22:27:46,741 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35938a5-f1e7-40c4-97d1-59d057359109/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-06 22:27:46,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35938a5-f1e7-40c4-97d1-59d057359109/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 22:27:46,941 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2023-11-06 22:27:46,942 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:27:46,942 INFO L85 PathProgramCache]: Analyzing trace with hash 194391591, now seen corresponding path program 1 times [2023-11-06 22:27:46,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:27:46,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324895733] [2023-11-06 22:27:46,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:27:46,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:27:46,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:27:47,253 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:27:47,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:27:47,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324895733] [2023-11-06 22:27:47,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324895733] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:27:47,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171410546] [2023-11-06 22:27:47,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:27:47,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:27:47,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35938a5-f1e7-40c4-97d1-59d057359109/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:27:47,256 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35938a5-f1e7-40c4-97d1-59d057359109/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:27:47,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35938a5-f1e7-40c4-97d1-59d057359109/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:27:47,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:27:47,363 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 22:27:47,366 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:27:47,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:27:47,429 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:27:47,655 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:27:47,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171410546] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:27:47,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:27:47,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 11 [2023-11-06 22:27:47,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828505236] [2023-11-06 22:27:47,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:27:47,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 22:27:47,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:27:47,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 22:27:47,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:27:47,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 260 [2023-11-06 22:27:47,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 1367 transitions, 27968 flow. Second operand has 13 states, 13 states have (on average 102.07692307692308) internal successors, (1327), 13 states have internal predecessors, (1327), 0 states have call successors, (0), 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 22:27:47,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:27:47,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 260 [2023-11-06 22:27:47,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:28:07,380 INFO L124 PetriNetUnfolderBase]: 26571/39660 cut-off events. [2023-11-06 22:28:07,380 INFO L125 PetriNetUnfolderBase]: For 903299/903299 co-relation queries the response was YES. [2023-11-06 22:28:07,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 310347 conditions, 39660 events. 26571/39660 cut-off events. For 903299/903299 co-relation queries the response was YES. Maximal size of possible extension queue 2259. Compared 287172 event pairs, 1081 based on Foata normal form. 3520/43180 useless extension candidates. Maximal degree in co-relation 310283. Up to 10359 conditions per place. [2023-11-06 22:28:07,894 INFO L140 encePairwiseOnDemand]: 249/260 looper letters, 1588 selfloop transitions, 1831 changer transitions 0/3419 dead transitions. [2023-11-06 22:28:07,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 3419 transitions, 74092 flow [2023-11-06 22:28:07,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-06 22:28:07,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-06 22:28:07,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3042 transitions. [2023-11-06 22:28:07,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2023-11-06 22:28:07,908 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3042 transitions. [2023-11-06 22:28:07,908 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3042 transitions. [2023-11-06 22:28:07,911 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:28:07,912 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3042 transitions. [2023-11-06 22:28:07,921 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 112.66666666666667) internal successors, (3042), 27 states have internal predecessors, (3042), 0 states have call successors, (0), 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 22:28:07,936 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 260.0) internal successors, (7280), 28 states have internal predecessors, (7280), 0 states have call successors, (0), 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 22:28:07,939 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 260.0) internal successors, (7280), 28 states have internal predecessors, (7280), 0 states have call successors, (0), 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 22:28:07,939 INFO L175 Difference]: Start difference. First operand has 136 places, 1367 transitions, 27968 flow. Second operand 27 states and 3042 transitions. [2023-11-06 22:28:07,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 3419 transitions, 74092 flow [2023-11-06 22:29:06,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 3419 transitions, 72380 flow, removed 852 selfloop flow, removed 2 redundant places. [2023-11-06 22:29:06,283 INFO L231 Difference]: Finished difference. Result has 180 places, 2529 transitions, 59254 flow [2023-11-06 22:29:06,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=25828, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=651, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=59254, PETRI_PLACES=180, PETRI_TRANSITIONS=2529} [2023-11-06 22:29:06,285 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 144 predicate places. [2023-11-06 22:29:06,285 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 2529 transitions, 59254 flow [2023-11-06 22:29:06,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 102.07692307692308) internal successors, (1327), 13 states have internal predecessors, (1327), 0 states have call successors, (0), 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 22:29:06,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:29:06,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:29:06,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35938a5-f1e7-40c4-97d1-59d057359109/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:29:06,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35938a5-f1e7-40c4-97d1-59d057359109/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-06 22:29:06,488 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread3Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2023-11-06 22:29:06,488 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:29:06,488 INFO L85 PathProgramCache]: Analyzing trace with hash 144372977, now seen corresponding path program 1 times [2023-11-06 22:29:06,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:29:06,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265544182] [2023-11-06 22:29:06,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:29:06,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:29:06,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:29:06,604 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 22:29:06,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:29:06,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265544182] [2023-11-06 22:29:06,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265544182] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:29:06,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053284841] [2023-11-06 22:29:06,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:29:06,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:29:06,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35938a5-f1e7-40c4-97d1-59d057359109/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:29:06,608 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35938a5-f1e7-40c4-97d1-59d057359109/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:29:06,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f35938a5-f1e7-40c4-97d1-59d057359109/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:29:06,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:29:06,728 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:29:06,730 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:29:06,890 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 22:29:06,891 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:29:06,966 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 22:29:06,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053284841] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:29:06,967 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:29:06,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-11-06 22:29:06,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221135796] [2023-11-06 22:29:06,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:29:06,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:29:06,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:29:06,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:29:06,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:29:07,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 260 [2023-11-06 22:29:07,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 2529 transitions, 59254 flow. Second operand has 8 states, 8 states have (on average 108.0) internal successors, (864), 8 states have internal predecessors, (864), 0 states have call successors, (0), 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 22:29:07,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:29:07,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 260 [2023-11-06 22:29:07,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:29:40,292 INFO L124 PetriNetUnfolderBase]: 25490/38141 cut-off events. [2023-11-06 22:29:40,292 INFO L125 PetriNetUnfolderBase]: For 896668/896668 co-relation queries the response was YES. [2023-11-06 22:29:40,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 315409 conditions, 38141 events. 25490/38141 cut-off events. For 896668/896668 co-relation queries the response was YES. Maximal size of possible extension queue 2142. Compared 275574 event pairs, 2035 based on Foata normal form. 1500/39641 useless extension candidates. Maximal degree in co-relation 315325. Up to 22335 conditions per place. [2023-11-06 22:29:40,996 INFO L140 encePairwiseOnDemand]: 250/260 looper letters, 1426 selfloop transitions, 1159 changer transitions 0/2585 dead transitions. [2023-11-06 22:29:40,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 2585 transitions, 64407 flow [2023-11-06 22:29:40,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:29:40,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 22:29:40,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1169 transitions. [2023-11-06 22:29:41,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44961538461538464 [2023-11-06 22:29:41,001 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1169 transitions. [2023-11-06 22:29:41,001 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1169 transitions. [2023-11-06 22:29:41,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:29:41,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1169 transitions. [2023-11-06 22:29:41,015 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 116.9) internal successors, (1169), 10 states have internal predecessors, (1169), 0 states have call successors, (0), 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 22:29:41,021 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 260.0) internal successors, (2860), 11 states have internal predecessors, (2860), 0 states have call successors, (0), 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 22:29:41,022 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 260.0) internal successors, (2860), 11 states have internal predecessors, (2860), 0 states have call successors, (0), 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 22:29:41,022 INFO L175 Difference]: Start difference. First operand has 180 places, 2529 transitions, 59254 flow. Second operand 10 states and 1169 transitions. [2023-11-06 22:29:41,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 2585 transitions, 64407 flow